| 1 | ! ============================================================================== |
| 2 | ! Module: system_interface |
| 3 | ! Purpose: C function interfaces and system call wrappers |
| 4 | ! ============================================================================== |
| 5 | module system_interface |
| 6 | use iso_c_binding |
| 7 | use shell_types |
| 8 | implicit none |
| 9 | |
| 10 | ! Signal numbers (platform-specific) |
| 11 | #ifdef __APPLE__ |
| 12 | ! macOS/Darwin signal numbers |
| 13 | integer(c_int), parameter :: SIGINT = 2 |
| 14 | integer(c_int), parameter :: SIGPIPE = 13 |
| 15 | integer(c_int), parameter :: SIGTSTP = 18 |
| 16 | integer(c_int), parameter :: SIGCHLD = 20 |
| 17 | integer(c_int), parameter :: SIGCONT = 19 |
| 18 | integer(c_int), parameter :: SIGTTIN = 21 |
| 19 | integer(c_int), parameter :: SIGTTOU = 22 |
| 20 | #else |
| 21 | ! Linux signal numbers |
| 22 | integer(c_int), parameter :: SIGINT = 2 |
| 23 | integer(c_int), parameter :: SIGPIPE = 13 |
| 24 | integer(c_int), parameter :: SIGTSTP = 20 |
| 25 | integer(c_int), parameter :: SIGCHLD = 17 |
| 26 | integer(c_int), parameter :: SIGCONT = 18 |
| 27 | integer(c_int), parameter :: SIGTTIN = 21 |
| 28 | integer(c_int), parameter :: SIGTTOU = 22 |
| 29 | #endif |
| 30 | |
| 31 | ! Wait options |
| 32 | integer(c_int), parameter :: WNOHANG = 1 |
| 33 | integer(c_int), parameter :: WUNTRACED = 2 |
| 34 | |
| 35 | ! Terminal control structures and constants |
| 36 | #ifdef __APPLE__ |
| 37 | ! macOS has NCCS=20 and uses 8-byte tcflag_t |
| 38 | integer(c_int), parameter :: NCCS = 20 |
| 39 | ! ioctl request for terminal size (macOS) |
| 40 | integer(c_long), parameter :: TIOCGWINSZ = int(z'40087468', c_long) |
| 41 | #else |
| 42 | ! Linux has NCCS=32 and uses 4-byte tcflag_t |
| 43 | integer(c_int), parameter :: NCCS = 32 |
| 44 | ! ioctl request for terminal size (Linux) |
| 45 | integer(c_long), parameter :: TIOCGWINSZ = int(z'5413', c_long) |
| 46 | #endif |
| 47 | |
| 48 | ! Window size structure for terminal dimensions |
| 49 | type, bind(c) :: winsize_t |
| 50 | integer(c_short) :: ws_row ! Number of rows |
| 51 | integer(c_short) :: ws_col ! Number of columns |
| 52 | integer(c_short) :: ws_xpixel ! Horizontal pixels |
| 53 | integer(c_short) :: ws_ypixel ! Vertical pixels |
| 54 | end type winsize_t |
| 55 | |
| 56 | ! termios structure - must match C struct termios exactly |
| 57 | type, bind(c) :: termios_t |
| 58 | #ifdef __APPLE__ |
| 59 | ! macOS: tcflag_t is unsigned long (8 bytes) |
| 60 | integer(c_long) :: c_iflag ! input flags (8 bytes) |
| 61 | integer(c_long) :: c_oflag ! output flags (8 bytes) |
| 62 | integer(c_long) :: c_cflag ! control flags (8 bytes) |
| 63 | integer(c_long) :: c_lflag ! local flags (8 bytes) |
| 64 | character(c_char) :: c_cc(20) ! control characters (20 bytes) |
| 65 | character(c_char) :: padding(4) ! padding for alignment (4 bytes) |
| 66 | integer(c_long) :: c_ispeed ! input speed (8 bytes) |
| 67 | integer(c_long) :: c_ospeed ! output speed (8 bytes) |
| 68 | ! Total: 72 bytes |
| 69 | #else |
| 70 | ! Linux: tcflag_t is unsigned int (4 bytes) |
| 71 | integer(c_int) :: c_iflag ! input flags (4 bytes) |
| 72 | integer(c_int) :: c_oflag ! output flags (4 bytes) |
| 73 | integer(c_int) :: c_cflag ! control flags (4 bytes) |
| 74 | integer(c_int) :: c_lflag ! local flags (4 bytes) |
| 75 | character(c_char) :: c_line ! line discipline (1 byte) |
| 76 | character(c_char) :: c_cc(NCCS) ! control characters (32 bytes) |
| 77 | character(c_char) :: padding(3) ! padding for alignment (3 bytes) |
| 78 | integer(c_int) :: c_ispeed ! input speed (4 bytes) |
| 79 | integer(c_int) :: c_ospeed ! output speed (4 bytes) |
| 80 | ! Total: 60 bytes (matches actual Linux struct termios) |
| 81 | #endif |
| 82 | end type termios_t |
| 83 | |
| 84 | ! Terminal flags (platform-specific values) |
| 85 | #ifdef __APPLE__ |
| 86 | ! macOS/Darwin values from sys/termios.h - use c_long to match tcflag_t |
| 87 | integer(c_long), parameter :: ICANON = int(z'00000100', c_long) ! canonical input |
| 88 | integer(c_long), parameter :: ECHO = int(z'00000008', c_long) ! enable echo |
| 89 | integer(c_long), parameter :: ECHOE = int(z'00000002', c_long) ! echo erase character |
| 90 | integer(c_long), parameter :: ECHOK = int(z'00000004', c_long) ! echo kill character |
| 91 | integer(c_long), parameter :: ECHONL = int(z'00000010', c_long) ! echo NL even if ECHO is off |
| 92 | integer(c_long), parameter :: IEXTEN = int(z'00000400', c_long) ! extended input processing |
| 93 | integer(c_long), parameter :: ISIG = int(z'00000080', c_long) ! enable signals |
| 94 | |
| 95 | ! Control character indices (macOS) |
| 96 | integer(c_int), parameter :: VEOF = 0 ! EOF character (Ctrl-D) |
| 97 | integer(c_int), parameter :: VEOL = 1 ! EOL character |
| 98 | integer(c_int), parameter :: VEOL2 = 2 ! EOL2 character |
| 99 | integer(c_int), parameter :: VERASE = 3 ! ERASE character |
| 100 | integer(c_int), parameter :: VWERASE = 4 ! WERASE character |
| 101 | integer(c_int), parameter :: VKILL = 5 ! KILL character |
| 102 | integer(c_int), parameter :: VREPRINT = 6 ! REPRINT character |
| 103 | integer(c_int), parameter :: VINTR = 8 ! INTR character (Ctrl-C) |
| 104 | integer(c_int), parameter :: VQUIT = 9 ! QUIT character |
| 105 | integer(c_int), parameter :: VSUSP = 10 ! SUSP character (Ctrl-Z) |
| 106 | integer(c_int), parameter :: VDSUSP = 11 ! DSUSP character |
| 107 | integer(c_int), parameter :: VSTART = 12 ! START character (Ctrl-Q) |
| 108 | integer(c_int), parameter :: VSTOP = 13 ! STOP character (Ctrl-S) |
| 109 | integer(c_int), parameter :: VLNEXT = 14 ! LNEXT character |
| 110 | integer(c_int), parameter :: VDISCARD = 15 ! DISCARD character |
| 111 | integer(c_int), parameter :: VMIN = 16 ! minimum chars for noncanonical read |
| 112 | integer(c_int), parameter :: VTIME = 17 ! timeout for noncanonical read |
| 113 | #else |
| 114 | ! Linux values from bits/termios.h - use c_int to match tcflag_t |
| 115 | integer(c_int), parameter :: ICANON = int(z'00000002', c_int) ! canonical input |
| 116 | integer(c_int), parameter :: ECHO = int(z'00000008', c_int) ! enable echo |
| 117 | integer(c_int), parameter :: ECHOE = int(z'00000010', c_int) ! echo erase character |
| 118 | integer(c_int), parameter :: ECHOK = int(z'00000020', c_int) ! echo kill character |
| 119 | integer(c_int), parameter :: ECHONL = int(z'00000040', c_int) ! echo NL even if ECHO is off |
| 120 | integer(c_int), parameter :: IEXTEN = int(z'00008000', c_int) ! extended input processing |
| 121 | integer(c_int), parameter :: ISIG = int(z'00000001', c_int) ! enable signals |
| 122 | |
| 123 | ! Control character indices (Linux) |
| 124 | integer(c_int), parameter :: VMIN = 6 ! minimum chars for noncanonical read |
| 125 | integer(c_int), parameter :: VTIME = 5 ! timeout for noncanonical read |
| 126 | #endif |
| 127 | |
| 128 | ! tcsetattr options |
| 129 | integer(c_int), parameter :: TCSANOW = 0 ! change immediately |
| 130 | integer(c_int), parameter :: TCSADRAIN = 1 ! change after output drained |
| 131 | integer(c_int), parameter :: TCSAFLUSH = 2 ! change after output drained and input flushed |
| 132 | |
| 133 | ! ANSI escape sequences for cursor control |
| 134 | character(len=*), parameter :: ESC_CLEAR_LINE = char(27) // '[K' |
| 135 | character(len=*), parameter :: ESC_MOVE_BOL = char(13) ! Carriage return |
| 136 | character(len=*), parameter :: ESC_CURSOR_LEFT = char(27) // '[D' |
| 137 | character(len=*), parameter :: ESC_CURSOR_RIGHT = char(27) // '[C' |
| 138 | character(len=*), parameter :: ESC_SAVE_CURSOR = char(27) // '[s' |
| 139 | character(len=*), parameter :: ESC_RESTORE_CURSOR = char(27) // '[u' |
| 140 | character(len=*), parameter :: ESC_HIDE_CURSOR = char(27) // '[?25l' |
| 141 | character(len=*), parameter :: ESC_SHOW_CURSOR = char(27) // '[?25h' |
| 142 | |
| 143 | ! stat structure (must be defined before interface block) |
| 144 | ! Platform-specific layouts - field order matters! |
| 145 | type, bind(c) :: stat_t |
| 146 | #ifdef __APPLE__ |
| 147 | ! macOS ARM64/x86_64 stat structure layout |
| 148 | integer(c_int) :: st_dev ! Device (4 bytes) - offset 0 |
| 149 | integer(c_short) :: st_mode ! File type and mode (2 bytes) - offset 4 |
| 150 | integer(c_short) :: st_nlink ! Number of hard links (2 bytes) - offset 6 |
| 151 | integer(c_long) :: st_ino ! Inode (8 bytes) - offset 8 |
| 152 | integer(c_int) :: st_uid ! User ID (4 bytes) - offset 16 |
| 153 | integer(c_int) :: st_gid ! Group ID (4 bytes) - offset 20 |
| 154 | integer(c_int) :: st_rdev ! Device type (4 bytes) - offset 24 |
| 155 | ! Timespec structures (16 bytes each = 8 bytes + 8 bytes) |
| 156 | integer(c_long) :: st_atimespec_sec ! Access time seconds |
| 157 | integer(c_long) :: st_atimespec_nsec ! Access time nanoseconds |
| 158 | integer(c_long) :: st_mtimespec_sec ! Modification time seconds |
| 159 | integer(c_long) :: st_mtimespec_nsec ! Modification time nanoseconds |
| 160 | integer(c_long) :: st_ctimespec_sec ! Status change time seconds |
| 161 | integer(c_long) :: st_ctimespec_nsec ! Status change time nanoseconds |
| 162 | integer(c_long) :: st_birthtimespec_sec ! Birth time seconds |
| 163 | integer(c_long) :: st_birthtimespec_nsec ! Birth time nanoseconds |
| 164 | integer(c_long) :: st_size ! Total size in bytes (8 bytes) |
| 165 | integer(c_long) :: st_blocks ! Number of 512-byte blocks (8 bytes) |
| 166 | integer(c_int) :: st_blksize ! Optimal block size (4 bytes) |
| 167 | integer(c_int) :: st_flags ! User defined flags (4 bytes) |
| 168 | integer(c_int) :: st_gen ! File generation number (4 bytes) |
| 169 | integer(c_int) :: st_lspare ! Reserved (4 bytes) |
| 170 | integer(c_long) :: st_qspare(2) ! Reserved (16 bytes) |
| 171 | #elif defined(__aarch64__) |
| 172 | ! Linux aarch64 stat structure layout (glibc generic 64-bit) |
| 173 | ! Field order and sizes differ from x86_64: mode/nlink swapped, nlink is 4B not 8B |
| 174 | integer(c_long) :: st_dev ! Device (8 bytes) - offset 0 |
| 175 | integer(c_long) :: st_ino ! Inode (8 bytes) - offset 8 |
| 176 | integer(c_int) :: st_mode ! File type and mode (4 bytes) - offset 16 |
| 177 | integer(c_int) :: st_nlink ! Number of hard links (4 bytes) - offset 20 |
| 178 | integer(c_int) :: st_uid ! User ID (4 bytes) - offset 24 |
| 179 | integer(c_int) :: st_gid ! Group ID (4 bytes) - offset 28 |
| 180 | integer(c_long) :: st_rdev ! Device type (8 bytes) - offset 32 |
| 181 | integer(c_long) :: pad1 ! __pad1 (8 bytes) - offset 40 |
| 182 | integer(c_long) :: st_size ! Total size in bytes (8 bytes) - offset 48 |
| 183 | integer(c_int) :: st_blksize ! Optimal block size (4 bytes) - offset 56 |
| 184 | integer(c_int) :: pad2 ! __pad2 (4 bytes) - offset 60 |
| 185 | integer(c_long) :: st_blocks ! Number of 512-byte blocks (8 bytes) - offset 64 |
| 186 | ! Time fields (struct timespec = 16 bytes each) |
| 187 | integer(c_long) :: st_atime ! Access time seconds - offset 72 |
| 188 | integer(c_long) :: st_atime_nsec ! Access time nanoseconds - offset 80 |
| 189 | integer(c_long) :: st_mtime ! Modification time seconds - offset 88 |
| 190 | integer(c_long) :: st_mtime_nsec ! Modification time nanoseconds - offset 96 |
| 191 | integer(c_long) :: st_ctime ! Status change time seconds - offset 104 |
| 192 | integer(c_long) :: st_ctime_nsec ! Status change time nanoseconds - offset 112 |
| 193 | integer(c_int) :: glibc_reserved(2) ! Reserved (8 bytes) - offset 120 |
| 194 | ! Total: 128 bytes |
| 195 | #else |
| 196 | ! Linux x86_64 stat structure layout |
| 197 | integer(c_long) :: st_dev ! Device (8 bytes) |
| 198 | integer(c_long) :: st_ino ! Inode (8 bytes) |
| 199 | integer(c_long) :: st_nlink ! Number of hard links (8 bytes) |
| 200 | integer(c_int) :: st_mode ! File type and mode (4 bytes) |
| 201 | integer(c_int) :: st_uid ! User ID (4 bytes) |
| 202 | integer(c_int) :: st_gid ! Group ID (4 bytes) |
| 203 | integer(c_int) :: pad0 ! Padding (4 bytes) |
| 204 | integer(c_long) :: st_rdev ! Device type (8 bytes) |
| 205 | integer(c_long) :: st_size ! Total size in bytes (8 bytes) |
| 206 | integer(c_long) :: st_blksize ! Optimal block size (8 bytes) |
| 207 | integer(c_long) :: st_blocks ! Number of 512-byte blocks (8 bytes) |
| 208 | ! Time fields |
| 209 | integer(c_long) :: st_atime ! Access time seconds |
| 210 | integer(c_long) :: st_atime_nsec ! Access time nanoseconds |
| 211 | integer(c_long) :: st_mtime ! Modification time seconds |
| 212 | integer(c_long) :: st_mtime_nsec ! Modification time nanoseconds |
| 213 | integer(c_long) :: st_ctime ! Status change time seconds |
| 214 | integer(c_long) :: st_ctime_nsec ! Status change time nanoseconds |
| 215 | integer(c_long) :: glibc_reserved(3) ! Reserved |
| 216 | #endif |
| 217 | end type stat_t |
| 218 | |
| 219 | ! timeval structure for getrusage |
| 220 | type, bind(c) :: timeval_t |
| 221 | integer(c_long) :: tv_sec ! Seconds |
| 222 | integer(c_long) :: tv_usec ! Microseconds |
| 223 | end type timeval_t |
| 224 | |
| 225 | ! rusage structure for getrusage |
| 226 | type, bind(c) :: rusage_t |
| 227 | type(timeval_t) :: ru_utime ! User CPU time used |
| 228 | type(timeval_t) :: ru_stime ! System CPU time used |
| 229 | integer(c_long) :: ru_maxrss ! Maximum resident set size |
| 230 | integer(c_long) :: ru_ixrss ! Integral shared memory size |
| 231 | integer(c_long) :: ru_idrss ! Integral unshared data size |
| 232 | integer(c_long) :: ru_isrss ! Integral unshared stack size |
| 233 | integer(c_long) :: ru_minflt ! Page reclaims (soft page faults) |
| 234 | integer(c_long) :: ru_majflt ! Page faults (hard page faults) |
| 235 | integer(c_long) :: ru_nswap ! Swaps |
| 236 | integer(c_long) :: ru_inblock ! Block input operations |
| 237 | integer(c_long) :: ru_oublock ! Block output operations |
| 238 | integer(c_long) :: ru_msgsnd ! IPC messages sent |
| 239 | integer(c_long) :: ru_msgrcv ! IPC messages received |
| 240 | integer(c_long) :: ru_nsignals ! Signals received |
| 241 | integer(c_long) :: ru_nvcsw ! Voluntary context switches |
| 242 | integer(c_long) :: ru_nivcsw ! Involuntary context switches |
| 243 | end type rusage_t |
| 244 | |
| 245 | ! getrusage who parameter values |
| 246 | integer(c_int), parameter :: RUSAGE_SELF = 0 |
| 247 | integer(c_int), parameter :: RUSAGE_CHILDREN = -1 |
| 248 | |
| 249 | ! rlimit structure for getrlimit/setrlimit |
| 250 | type, bind(c) :: rlimit_t |
| 251 | integer(c_long) :: rlim_cur ! Current (soft) limit |
| 252 | integer(c_long) :: rlim_max ! Maximum (hard) limit |
| 253 | end type rlimit_t |
| 254 | |
| 255 | ! Resource limit constants |
| 256 | integer(c_int), parameter :: RLIMIT_CPU = 0 ! CPU time in seconds |
| 257 | integer(c_int), parameter :: RLIMIT_FSIZE = 1 ! Maximum file size |
| 258 | integer(c_int), parameter :: RLIMIT_DATA = 2 ! Maximum data segment size |
| 259 | integer(c_int), parameter :: RLIMIT_STACK = 3 ! Maximum stack size |
| 260 | integer(c_int), parameter :: RLIMIT_CORE = 4 ! Maximum core file size |
| 261 | integer(c_int), parameter :: RLIMIT_RSS = 5 ! Maximum resident set size |
| 262 | #ifdef __APPLE__ |
| 263 | ! macOS uses different constant values than Linux for these |
| 264 | integer(c_int), parameter :: RLIMIT_MEMLOCK = 6 |
| 265 | integer(c_int), parameter :: RLIMIT_NPROC = 7 |
| 266 | integer(c_int), parameter :: RLIMIT_NOFILE = 8 |
| 267 | integer(c_int), parameter :: RLIMIT_AS = 5 ! Same as RSS on macOS |
| 268 | #else |
| 269 | integer(c_int), parameter :: RLIMIT_NPROC = 6 |
| 270 | integer(c_int), parameter :: RLIMIT_NOFILE = 7 |
| 271 | integer(c_int), parameter :: RLIMIT_MEMLOCK = 8 |
| 272 | integer(c_int), parameter :: RLIMIT_AS = 9 |
| 273 | integer(c_int), parameter :: RLIMIT_LOCKS = 10 |
| 274 | integer(c_int), parameter :: RLIMIT_SIGPENDING = 11 |
| 275 | #endif |
| 276 | integer(c_int), parameter :: RLIMIT_MSGQUEUE = 12 ! Maximum bytes in POSIX message queues |
| 277 | |
| 278 | ! Infinite limit value |
| 279 | #ifdef __APPLE__ |
| 280 | integer(c_long), parameter :: RLIM_INFINITY = 9223372036854775807_c_long ! 0x7FFFFFFFFFFFFFFF on macOS |
| 281 | #else |
| 282 | integer(c_long), parameter :: RLIM_INFINITY = -1 ! (unsigned long)-1 on Linux |
| 283 | #endif |
| 284 | |
| 285 | ! C function interfaces |
| 286 | interface |
| 287 | function c_fork() bind(C, name="fork") |
| 288 | import :: c_pid_t |
| 289 | integer(c_pid_t) :: c_fork |
| 290 | end function |
| 291 | |
| 292 | function c_execvp(file, argv) bind(C, name="execvp") |
| 293 | import :: c_ptr, c_int |
| 294 | type(c_ptr), value :: file, argv |
| 295 | integer(c_int) :: c_execvp |
| 296 | end function |
| 297 | |
| 298 | function c_waitpid(pid, status, options) bind(C, name="waitpid") |
| 299 | import :: c_pid_t, c_ptr, c_int |
| 300 | integer(c_pid_t), value :: pid |
| 301 | type(c_ptr), value :: status |
| 302 | integer(c_int), value :: options |
| 303 | integer(c_pid_t) :: c_waitpid |
| 304 | end function |
| 305 | |
| 306 | function c_gethostname(name, len) bind(C, name="gethostname") |
| 307 | import :: c_ptr, c_size_t, c_int |
| 308 | type(c_ptr), value :: name |
| 309 | integer(c_size_t), value :: len |
| 310 | integer(c_int) :: c_gethostname |
| 311 | end function |
| 312 | |
| 313 | function c_getenv(name) bind(C, name="getenv") |
| 314 | import :: c_ptr |
| 315 | type(c_ptr), value :: name |
| 316 | type(c_ptr) :: c_getenv |
| 317 | end function |
| 318 | |
| 319 | function c_setenv(name, value, overwrite) bind(C, name="setenv") |
| 320 | import :: c_ptr, c_int |
| 321 | type(c_ptr), value :: name, value |
| 322 | integer(c_int), value :: overwrite |
| 323 | integer(c_int) :: c_setenv |
| 324 | end function |
| 325 | |
| 326 | function c_unsetenv(name) bind(C, name="unsetenv") |
| 327 | import :: c_ptr, c_int |
| 328 | type(c_ptr), value :: name |
| 329 | integer(c_int) :: c_unsetenv |
| 330 | end function |
| 331 | |
| 332 | function c_chdir(path) bind(C, name="chdir") |
| 333 | import :: c_ptr, c_int |
| 334 | type(c_ptr), value :: path |
| 335 | integer(c_int) :: c_chdir |
| 336 | end function |
| 337 | |
| 338 | function c_getcwd(buf, size) bind(C, name="getcwd") |
| 339 | import :: c_ptr, c_size_t |
| 340 | type(c_ptr), value :: buf |
| 341 | integer(c_size_t), value :: size |
| 342 | type(c_ptr) :: c_getcwd |
| 343 | end function |
| 344 | |
| 345 | function c_open(pathname, flags, mode) bind(C, name="open") |
| 346 | import :: c_ptr, c_int |
| 347 | type(c_ptr), value :: pathname |
| 348 | integer(c_int), value :: flags, mode |
| 349 | integer(c_int) :: c_open |
| 350 | end function |
| 351 | |
| 352 | function c_close(fd) bind(C, name="close") |
| 353 | import :: c_int |
| 354 | integer(c_int), value :: fd |
| 355 | integer(c_int) :: c_close |
| 356 | end function |
| 357 | |
| 358 | function c_dup(fd) bind(C, name="dup") |
| 359 | import :: c_int |
| 360 | integer(c_int), value :: fd |
| 361 | integer(c_int) :: c_dup |
| 362 | end function |
| 363 | |
| 364 | function c_dup2(oldfd, newfd) bind(C, name="dup2") |
| 365 | import :: c_int |
| 366 | integer(c_int), value :: oldfd, newfd |
| 367 | integer(c_int) :: c_dup2 |
| 368 | end function |
| 369 | |
| 370 | function c_pipe(pipefd) bind(C, name="pipe") |
| 371 | import :: c_ptr, c_int |
| 372 | type(c_ptr), value :: pipefd |
| 373 | integer(c_int) :: c_pipe |
| 374 | end function |
| 375 | |
| 376 | function c_getpid() bind(C, name="getpid") |
| 377 | import :: c_pid_t |
| 378 | integer(c_pid_t) :: c_getpid |
| 379 | end function |
| 380 | |
| 381 | function c_getpgid(pid) bind(C, name="getpgid") |
| 382 | import :: c_pid_t |
| 383 | integer(c_pid_t), value :: pid |
| 384 | integer(c_pid_t) :: c_getpgid |
| 385 | end function |
| 386 | |
| 387 | function c_setpgid(pid, pgid) bind(C, name="setpgid") |
| 388 | import :: c_pid_t, c_int |
| 389 | integer(c_pid_t), value :: pid, pgid |
| 390 | integer(c_int) :: c_setpgid |
| 391 | end function |
| 392 | |
| 393 | function c_tcgetpgrp(fd) bind(C, name="tcgetpgrp") |
| 394 | import :: c_int, c_pid_t |
| 395 | integer(c_int), value :: fd |
| 396 | integer(c_pid_t) :: c_tcgetpgrp |
| 397 | end function |
| 398 | |
| 399 | function c_tcsetpgrp(fd, pgrp) bind(C, name="tcsetpgrp") |
| 400 | import :: c_int, c_pid_t |
| 401 | integer(c_int), value :: fd |
| 402 | integer(c_pid_t), value :: pgrp |
| 403 | integer(c_int) :: c_tcsetpgrp |
| 404 | end function |
| 405 | |
| 406 | function c_kill(pid, sig) bind(C, name="kill") |
| 407 | import :: c_pid_t, c_int |
| 408 | integer(c_pid_t), value :: pid |
| 409 | integer(c_int), value :: sig |
| 410 | integer(c_int) :: c_kill |
| 411 | end function |
| 412 | |
| 413 | function c_signal(signum, handler) bind(C, name="signal") |
| 414 | import :: c_int, c_funptr |
| 415 | integer(c_int), value :: signum |
| 416 | type(c_funptr), value :: handler |
| 417 | type(c_funptr) :: c_signal |
| 418 | end function |
| 419 | |
| 420 | function c_isatty(fd) bind(C, name="isatty") |
| 421 | import :: c_int |
| 422 | integer(c_int), value :: fd |
| 423 | integer(c_int) :: c_isatty |
| 424 | end function |
| 425 | |
| 426 | function c_write(fd, buf, count) bind(C, name="write") |
| 427 | import :: c_int, c_ptr, c_size_t, c_intptr_t |
| 428 | integer(c_int), value :: fd |
| 429 | type(c_ptr), value :: buf |
| 430 | integer(c_size_t), value :: count |
| 431 | integer(c_intptr_t) :: c_write ! ssize_t is signed, returns -1 on error |
| 432 | end function |
| 433 | |
| 434 | function c_popen(command, type) bind(C, name="popen") |
| 435 | import :: c_ptr |
| 436 | type(c_ptr), value :: command, type |
| 437 | type(c_ptr) :: c_popen |
| 438 | end function |
| 439 | |
| 440 | function c_pclose(stream) bind(C, name="pclose") |
| 441 | import :: c_ptr, c_int |
| 442 | type(c_ptr), value :: stream |
| 443 | integer(c_int) :: c_pclose |
| 444 | end function |
| 445 | |
| 446 | function c_fgets(s, size, stream) bind(C, name="fgets") |
| 447 | import :: c_ptr, c_int |
| 448 | type(c_ptr), value :: s |
| 449 | integer(c_int), value :: size |
| 450 | type(c_ptr), value :: stream |
| 451 | type(c_ptr) :: c_fgets |
| 452 | end function |
| 453 | |
| 454 | ! Write a null-terminated string to a stream (shift phase Sprint 5: |
| 455 | ! used to pipe text into clipboard tools like pbcopy via popen("w")). |
| 456 | function c_fputs(s, stream) bind(C, name="fputs") |
| 457 | import :: c_ptr, c_int |
| 458 | type(c_ptr), value :: s |
| 459 | type(c_ptr), value :: stream |
| 460 | integer(c_int) :: c_fputs |
| 461 | end function |
| 462 | |
| 463 | subroutine c_exit(status) bind(C, name="exit") |
| 464 | import :: c_int |
| 465 | integer(c_int), value :: status |
| 466 | end subroutine |
| 467 | |
| 468 | subroutine c_perror(s) bind(C, name="perror") |
| 469 | import :: c_ptr |
| 470 | type(c_ptr), value :: s |
| 471 | end subroutine |
| 472 | |
| 473 | ! Terminal control functions |
| 474 | function c_tcgetattr(fd, termios_p) bind(C, name="tcgetattr") |
| 475 | import :: c_int, termios_t |
| 476 | integer(c_int), value :: fd |
| 477 | type(termios_t), intent(out) :: termios_p |
| 478 | integer(c_int) :: c_tcgetattr |
| 479 | end function |
| 480 | |
| 481 | function c_tcsetattr(fd, optional_actions, termios_p) bind(C, name="tcsetattr") |
| 482 | import :: c_int, termios_t |
| 483 | integer(c_int), value :: fd, optional_actions |
| 484 | type(termios_t), intent(in) :: termios_p |
| 485 | integer(c_int) :: c_tcsetattr |
| 486 | end function |
| 487 | |
| 488 | function c_read(fd, buf, count) bind(C, name="read") |
| 489 | import :: c_int, c_ptr, c_size_t |
| 490 | integer(c_int), value :: fd |
| 491 | type(c_ptr), value :: buf |
| 492 | integer(c_size_t), value :: count |
| 493 | integer(c_size_t) :: c_read |
| 494 | end function |
| 495 | |
| 496 | subroutine c_cfmakeraw(termios_p) bind(C, name="cfmakeraw") |
| 497 | import :: termios_t |
| 498 | type(termios_t), intent(inout) :: termios_p |
| 499 | end subroutine |
| 500 | |
| 501 | function c_getppid() bind(C, name="getppid") |
| 502 | import :: c_pid_t |
| 503 | integer(c_pid_t) :: c_getppid |
| 504 | end function |
| 505 | |
| 506 | function c_getuid() bind(C, name="getuid") |
| 507 | import :: c_int |
| 508 | integer(c_int) :: c_getuid |
| 509 | end function |
| 510 | |
| 511 | function c_geteuid() bind(C, name="geteuid") |
| 512 | import :: c_int |
| 513 | integer(c_int) :: c_geteuid |
| 514 | end function |
| 515 | |
| 516 | function c_stat(pathname, statbuf) bind(C, name="stat") |
| 517 | import :: c_ptr, c_int, stat_t |
| 518 | type(c_ptr), value :: pathname |
| 519 | type(stat_t), intent(out) :: statbuf |
| 520 | integer(c_int) :: c_stat |
| 521 | end function |
| 522 | |
| 523 | function c_lstat(pathname, statbuf) bind(C, name="lstat") |
| 524 | import :: c_ptr, c_int, stat_t |
| 525 | type(c_ptr), value :: pathname |
| 526 | type(stat_t), intent(out) :: statbuf |
| 527 | integer(c_int) :: c_lstat |
| 528 | end function |
| 529 | |
| 530 | ! Portable stat helpers — bypass Fortran struct stat layout across architectures |
| 531 | function fortsh_stat_mode(pathname) bind(C, name="fortsh_stat_mode") |
| 532 | import :: c_ptr, c_int |
| 533 | type(c_ptr), value :: pathname |
| 534 | integer(c_int) :: fortsh_stat_mode |
| 535 | end function |
| 536 | |
| 537 | function fortsh_lstat_mode(pathname) bind(C, name="fortsh_lstat_mode") |
| 538 | import :: c_ptr, c_int |
| 539 | type(c_ptr), value :: pathname |
| 540 | integer(c_int) :: fortsh_lstat_mode |
| 541 | end function |
| 542 | |
| 543 | function fortsh_stat_size(pathname) bind(C, name="fortsh_stat_size") |
| 544 | import :: c_ptr, c_long_long |
| 545 | type(c_ptr), value :: pathname |
| 546 | integer(c_long_long) :: fortsh_stat_size |
| 547 | end function |
| 548 | |
| 549 | function fortsh_stat_uid(pathname) bind(C, name="fortsh_stat_uid") |
| 550 | import :: c_ptr, c_int |
| 551 | type(c_ptr), value :: pathname |
| 552 | integer(c_int) :: fortsh_stat_uid |
| 553 | end function |
| 554 | |
| 555 | function fortsh_stat_mtime(pathname) bind(C, name="fortsh_stat_mtime") |
| 556 | import :: c_ptr, c_long_long |
| 557 | type(c_ptr), value :: pathname |
| 558 | integer(c_long_long) :: fortsh_stat_mtime |
| 559 | end function |
| 560 | |
| 561 | function fortsh_stat_dev(pathname) bind(C, name="fortsh_stat_dev") |
| 562 | import :: c_ptr, c_long_long |
| 563 | type(c_ptr), value :: pathname |
| 564 | integer(c_long_long) :: fortsh_stat_dev |
| 565 | end function |
| 566 | |
| 567 | function fortsh_stat_ino(pathname) bind(C, name="fortsh_stat_ino") |
| 568 | import :: c_ptr, c_long_long |
| 569 | type(c_ptr), value :: pathname |
| 570 | integer(c_long_long) :: fortsh_stat_ino |
| 571 | end function |
| 572 | |
| 573 | function c_access(pathname, mode) bind(C, name="access") |
| 574 | import :: c_ptr, c_int |
| 575 | type(c_ptr), value :: pathname |
| 576 | integer(c_int), value :: mode |
| 577 | integer(c_int) :: c_access |
| 578 | end function |
| 579 | |
| 580 | function c_umask(mask) bind(C, name="umask") |
| 581 | import :: c_int |
| 582 | integer(c_int), value :: mask |
| 583 | integer(c_int) :: c_umask |
| 584 | end function |
| 585 | |
| 586 | function c_getrusage(who, usage) bind(C, name="getrusage") |
| 587 | import :: c_int, rusage_t |
| 588 | integer(c_int), value :: who |
| 589 | type(rusage_t), intent(out) :: usage |
| 590 | integer(c_int) :: c_getrusage |
| 591 | end function |
| 592 | |
| 593 | function c_getrlimit(resource, rlim) bind(C, name="getrlimit") |
| 594 | import :: c_int, rlimit_t |
| 595 | integer(c_int), value :: resource |
| 596 | type(rlimit_t), intent(out) :: rlim |
| 597 | integer(c_int) :: c_getrlimit |
| 598 | end function |
| 599 | |
| 600 | function c_setrlimit(resource, rlim) bind(C, name="setrlimit") |
| 601 | import :: c_int, rlimit_t |
| 602 | integer(c_int), value :: resource |
| 603 | type(rlimit_t), intent(in) :: rlim |
| 604 | integer(c_int) :: c_setrlimit |
| 605 | end function |
| 606 | |
| 607 | function c_mkfifo(pathname, mode) bind(C, name="mkfifo") |
| 608 | import :: c_ptr, c_int |
| 609 | type(c_ptr), value :: pathname |
| 610 | integer(c_int), value :: mode |
| 611 | integer(c_int) :: c_mkfifo |
| 612 | end function |
| 613 | |
| 614 | function c_unlink(pathname) bind(C, name="unlink") |
| 615 | import :: c_ptr, c_int |
| 616 | type(c_ptr), value :: pathname |
| 617 | integer(c_int) :: c_unlink |
| 618 | end function |
| 619 | |
| 620 | function c_ioctl(fd, request, argp) bind(C, name="ioctl") |
| 621 | import :: c_int, c_long, c_ptr |
| 622 | integer(c_int), value :: fd |
| 623 | integer(c_long), value :: request |
| 624 | type(c_ptr), value :: argp |
| 625 | integer(c_int) :: c_ioctl |
| 626 | end function |
| 627 | |
| 628 | ! C wrapper for getting terminal size |
| 629 | function get_term_size_c(rows, cols) bind(C, name="get_term_size_c") |
| 630 | import :: c_int |
| 631 | integer(c_int) :: rows, cols |
| 632 | integer(c_int) :: get_term_size_c |
| 633 | end function |
| 634 | |
| 635 | ! Get environ pointer (array of environment strings) |
| 636 | function c_get_environ_ptr(idx) bind(C, name="get_environ_ptr") |
| 637 | import :: c_ptr, c_int |
| 638 | integer(c_int), value :: idx |
| 639 | type(c_ptr) :: c_get_environ_ptr |
| 640 | end function |
| 641 | end interface |
| 642 | |
| 643 | ! Signal handler types (initialized in module initialization) |
| 644 | type(c_funptr) :: SIG_DFL, SIG_IGN |
| 645 | |
| 646 | ! File flags for open() - platform-specific values |
| 647 | integer(c_int), parameter :: O_RDONLY = 0 |
| 648 | integer(c_int), parameter :: O_WRONLY = 1 |
| 649 | ! macOS/Darwin values (TODO: add Linux support) |
| 650 | integer(c_int), parameter :: O_CREAT = 512 ! 0x200 on macOS, 0x40 on Linux |
| 651 | integer(c_int), parameter :: O_TRUNC = 1024 ! 0x400 on macOS, 0x200 on Linux |
| 652 | integer(c_int), parameter :: O_APPEND = 8 ! 0x8 on macOS, 0x400 on Linux |
| 653 | |
| 654 | ! File descriptors |
| 655 | integer(c_int), parameter :: STDIN_FD = 0 |
| 656 | integer(c_int), parameter :: STDOUT_FD = 1 |
| 657 | integer(c_int), parameter :: STDERR_FD = 2 |
| 658 | |
| 659 | ! File mode bits (for stat st_mode field) |
| 660 | integer(c_int), parameter :: S_IFMT = int(o'170000', c_int) ! File type mask |
| 661 | integer(c_int), parameter :: S_IFREG = int(o'100000', c_int) ! Regular file |
| 662 | integer(c_int), parameter :: S_IFDIR = int(o'040000', c_int) ! Directory |
| 663 | integer(c_int), parameter :: S_IFLNK = int(o'120000', c_int) ! Symbolic link |
| 664 | integer(c_int), parameter :: S_IFBLK = int(o'060000', c_int) ! Block device |
| 665 | integer(c_int), parameter :: S_IFCHR = int(o'020000', c_int) ! Character device |
| 666 | integer(c_int), parameter :: S_IFIFO = int(o'010000', c_int) ! FIFO (named pipe) |
| 667 | integer(c_int), parameter :: S_IFSOCK = int(o'140000', c_int) ! Socket |
| 668 | |
| 669 | integer(c_int), parameter :: S_ISUID = int(o'004000', c_int) ! Set UID bit |
| 670 | integer(c_int), parameter :: S_ISGID = int(o'002000', c_int) ! Set GID bit |
| 671 | integer(c_int), parameter :: S_ISVTX = int(o'001000', c_int) ! Sticky bit |
| 672 | |
| 673 | integer(c_int), parameter :: S_IRUSR = int(o'000400', c_int) ! Owner read |
| 674 | integer(c_int), parameter :: S_IWUSR = int(o'000200', c_int) ! Owner write |
| 675 | integer(c_int), parameter :: S_IXUSR = int(o'000100', c_int) ! Owner execute |
| 676 | integer(c_int), parameter :: S_IRGRP = int(o'000040', c_int) ! Group read |
| 677 | integer(c_int), parameter :: S_IWGRP = int(o'000020', c_int) ! Group write |
| 678 | integer(c_int), parameter :: S_IXGRP = int(o'000010', c_int) ! Group execute |
| 679 | integer(c_int), parameter :: S_IROTH = int(o'000004', c_int) ! Others read |
| 680 | integer(c_int), parameter :: S_IWOTH = int(o'000002', c_int) ! Others write |
| 681 | integer(c_int), parameter :: S_IXOTH = int(o'000001', c_int) ! Others execute |
| 682 | |
| 683 | ! Access mode flags |
| 684 | integer(c_int), parameter :: F_OK = 0 ! File exists |
| 685 | integer(c_int), parameter :: R_OK = 4 ! Read permission |
| 686 | integer(c_int), parameter :: W_OK = 2 ! Write permission |
| 687 | integer(c_int), parameter :: X_OK = 1 ! Execute permission |
| 688 | |
| 689 | contains |
| 690 | |
| 691 | function get_environment_var(var_name) result(value) |
| 692 | character(len=*), intent(in) :: var_name |
| 693 | character(len=:), allocatable :: value |
| 694 | type(c_ptr) :: c_value_ptr |
| 695 | character(kind=c_char), pointer :: c_value(:) |
| 696 | integer :: i |
| 697 | character(len=256), target :: c_var_name |
| 698 | |
| 699 | c_var_name = trim(var_name)//c_null_char |
| 700 | c_value_ptr = c_getenv(c_loc(c_var_name)) |
| 701 | |
| 702 | if (c_associated(c_value_ptr)) then |
| 703 | call c_f_pointer(c_value_ptr, c_value, [MAX_ENV_LEN]) |
| 704 | |
| 705 | do i = 1, MAX_ENV_LEN |
| 706 | if (c_value(i) == c_null_char) exit |
| 707 | end do |
| 708 | |
| 709 | allocate(character(len=i-1) :: value) |
| 710 | do i = 1, len(value) |
| 711 | value(i:i) = c_value(i) |
| 712 | end do |
| 713 | else |
| 714 | allocate(character(len=0) :: value) |
| 715 | end if |
| 716 | end function |
| 717 | |
| 718 | function set_environment_var(var_name, var_value) result(success) |
| 719 | character(len=*), intent(in) :: var_name, var_value |
| 720 | logical :: success |
| 721 | integer :: ret |
| 722 | character(len=MAX_TOKEN_LEN), target :: c_var_name |
| 723 | character(len=MAX_PATH_LEN), target :: c_var_value |
| 724 | |
| 725 | c_var_name = trim(var_name)//c_null_char |
| 726 | c_var_value = trim(var_value)//c_null_char |
| 727 | ret = c_setenv(c_loc(c_var_name), c_loc(c_var_value), 1_c_int) |
| 728 | success = (ret == 0) |
| 729 | end function |
| 730 | |
| 731 | subroutine unset_environment_var(var_name) |
| 732 | character(len=*), intent(in) :: var_name |
| 733 | integer :: ret |
| 734 | character(len=256), target :: c_var_name |
| 735 | |
| 736 | c_var_name = trim(var_name)//c_null_char |
| 737 | ret = c_unsetenv(c_loc(c_var_name)) |
| 738 | ! Ignore return value - unsetenv doesn't typically fail |
| 739 | end subroutine |
| 740 | |
| 741 | ! Get environment entry by index (for iterating through all env vars) |
| 742 | ! Returns empty string when index is beyond end of environ array |
| 743 | function get_environ_entry(idx) result(entry) |
| 744 | integer, intent(in) :: idx |
| 745 | character(len=:), allocatable :: entry |
| 746 | type(c_ptr) :: c_entry_ptr |
| 747 | character(kind=c_char), pointer :: c_entry(:) |
| 748 | integer :: i |
| 749 | |
| 750 | c_entry_ptr = c_get_environ_ptr(int(idx, c_int)) |
| 751 | |
| 752 | if (c_associated(c_entry_ptr)) then |
| 753 | call c_f_pointer(c_entry_ptr, c_entry, [MAX_ENV_LEN]) |
| 754 | |
| 755 | do i = 1, MAX_ENV_LEN |
| 756 | if (c_entry(i) == c_null_char) exit |
| 757 | end do |
| 758 | |
| 759 | allocate(character(len=i-1) :: entry) |
| 760 | do i = 1, len(entry) |
| 761 | entry(i:i) = c_entry(i) |
| 762 | end do |
| 763 | else |
| 764 | allocate(character(len=0) :: entry) |
| 765 | end if |
| 766 | end function |
| 767 | |
| 768 | function change_directory(path) result(success) |
| 769 | character(len=*), intent(in) :: path |
| 770 | logical :: success |
| 771 | integer :: ret |
| 772 | character(len=256), target :: c_path |
| 773 | |
| 774 | c_path = trim(path)//c_null_char |
| 775 | ret = c_chdir(c_loc(c_path)) |
| 776 | success = (ret == 0) |
| 777 | end function |
| 778 | |
| 779 | function get_current_directory() result(path) |
| 780 | character(len=:), allocatable :: path |
| 781 | character(kind=c_char), target :: c_path(MAX_PATH_LEN) |
| 782 | type(c_ptr) :: ret_ptr |
| 783 | integer :: i |
| 784 | |
| 785 | ret_ptr = c_getcwd(c_loc(c_path), int(MAX_PATH_LEN, c_size_t)) |
| 786 | |
| 787 | if (c_associated(ret_ptr)) then |
| 788 | do i = 1, MAX_PATH_LEN |
| 789 | if (c_path(i) == c_null_char) exit |
| 790 | end do |
| 791 | |
| 792 | allocate(character(len=i-1) :: path) |
| 793 | do i = 1, len(path) |
| 794 | path(i:i) = c_path(i) |
| 795 | end do |
| 796 | else |
| 797 | allocate(character(len=0) :: path) |
| 798 | end if |
| 799 | end function |
| 800 | |
| 801 | function create_pipe(read_fd, write_fd) result(success) |
| 802 | integer(c_int), intent(out) :: read_fd, write_fd |
| 803 | logical :: success |
| 804 | integer(c_int), target :: pipefd(2) |
| 805 | integer :: ret |
| 806 | |
| 807 | ret = c_pipe(c_loc(pipefd)) |
| 808 | if (ret == 0) then |
| 809 | read_fd = pipefd(1) |
| 810 | write_fd = pipefd(2) |
| 811 | success = .true. |
| 812 | else |
| 813 | success = .false. |
| 814 | end if |
| 815 | end function |
| 816 | |
| 817 | ! Check process status macros |
| 818 | function WIFEXITED(status) result(exited) |
| 819 | integer(c_int), intent(in) :: status |
| 820 | logical :: exited |
| 821 | exited = (iand(status, 127) == 0) |
| 822 | end function |
| 823 | |
| 824 | function WIFSTOPPED(status) result(stopped) |
| 825 | integer(c_int), intent(in) :: status |
| 826 | logical :: stopped |
| 827 | stopped = (iand(status, 255) == 127) |
| 828 | end function |
| 829 | |
| 830 | function WEXITSTATUS(status) result(exit_status) |
| 831 | integer(c_int), intent(in) :: status |
| 832 | integer :: exit_status |
| 833 | exit_status = ishft(iand(status, 65280), -8) |
| 834 | end function |
| 835 | |
| 836 | function WIFSIGNALED(status) result(signaled) |
| 837 | integer(c_int), intent(in) :: status |
| 838 | logical :: signaled |
| 839 | integer :: low7 |
| 840 | low7 = iand(status, 127) |
| 841 | ! Process was killed by a signal if low 7 bits are non-zero and not 0x7f (stopped) |
| 842 | signaled = (low7 /= 0) .and. (low7 /= 127) |
| 843 | end function |
| 844 | |
| 845 | function WTERMSIG(status) result(sig) |
| 846 | integer(c_int), intent(in) :: status |
| 847 | integer :: sig |
| 848 | sig = iand(status, 127) |
| 849 | end function |
| 850 | |
| 851 | function WSTOPSIG(status) result(sig) |
| 852 | integer(c_int), intent(in) :: status |
| 853 | integer :: sig |
| 854 | sig = iand(ishft(status, -8), 255) |
| 855 | end function |
| 856 | |
| 857 | function execute_and_capture(command) result(output) |
| 858 | character(len=*), intent(in) :: command |
| 859 | character(len=:), allocatable :: output |
| 860 | |
| 861 | type(c_ptr) :: pipe_ptr |
| 862 | character(kind=c_char), target :: buffer(4096) ! Larger buffer per read |
| 863 | character(len=65536) :: temp_output ! 64KB buffer |
| 864 | type(c_ptr) :: ret_ptr |
| 865 | integer :: i, pos, bytes_read |
| 866 | character(len=256), target :: c_command |
| 867 | character(len=4), target :: c_mode |
| 868 | |
| 869 | ! Convert strings to proper format |
| 870 | c_command = trim(command)//c_null_char |
| 871 | c_mode = 'r'//c_null_char |
| 872 | |
| 873 | ! Open pipe to command |
| 874 | pipe_ptr = c_popen(c_loc(c_command), c_loc(c_mode)) |
| 875 | |
| 876 | if (.not. c_associated(pipe_ptr)) then |
| 877 | allocate(character(len=0) :: output) |
| 878 | return |
| 879 | end if |
| 880 | |
| 881 | temp_output = '' |
| 882 | pos = 1 |
| 883 | |
| 884 | ! Read output with larger buffer |
| 885 | do |
| 886 | ! Initialize buffer for this read |
| 887 | buffer = c_null_char |
| 888 | |
| 889 | ret_ptr = c_fgets(c_loc(buffer), int(4096, c_int), pipe_ptr) |
| 890 | if (.not. c_associated(ret_ptr)) exit |
| 891 | |
| 892 | ! Convert to Fortran string |
| 893 | bytes_read = 0 |
| 894 | do i = 1, 4096 |
| 895 | if (buffer(i) == c_null_char) exit |
| 896 | bytes_read = bytes_read + 1 |
| 897 | if (pos > len(temp_output)) exit ! Buffer full |
| 898 | |
| 899 | if (buffer(i) /= char(10)) then ! Skip newlines |
| 900 | temp_output(pos:pos) = buffer(i) |
| 901 | pos = pos + 1 |
| 902 | else if (pos > 1 .and. temp_output(pos-1:pos-1) /= ' ') then |
| 903 | temp_output(pos:pos) = ' ' |
| 904 | pos = pos + 1 |
| 905 | end if |
| 906 | end do |
| 907 | |
| 908 | ! Debug: Check if we should continue reading |
| 909 | ! Exit if we read less than expected OR hit buffer limit |
| 910 | if (pos > len(temp_output)) exit |
| 911 | if (bytes_read == 0) exit |
| 912 | end do |
| 913 | |
| 914 | ! Close pipe |
| 915 | i = c_pclose(pipe_ptr) |
| 916 | |
| 917 | ! Return output (deallocate first if already allocated, which shouldn't happen but prevents crash) |
| 918 | if (allocated(output)) deallocate(output) |
| 919 | allocate(character(len=pos-1) :: output) |
| 920 | output = temp_output(:pos-1) |
| 921 | end function |
| 922 | |
| 923 | ! Like execute_and_capture but converts newlines to tabs instead of spaces. |
| 924 | ! This preserves filenames with spaces for completion parsing. |
| 925 | function execute_and_capture_tabs(command) result(output) |
| 926 | character(len=*), intent(in) :: command |
| 927 | character(len=:), allocatable :: output |
| 928 | |
| 929 | type(c_ptr) :: pipe_ptr |
| 930 | character(kind=c_char), target :: buffer(4096) |
| 931 | character(len=65536) :: temp_output |
| 932 | type(c_ptr) :: ret_ptr |
| 933 | integer :: i, pos, bytes_read |
| 934 | character(len=256), target :: c_command |
| 935 | character(len=4), target :: c_mode |
| 936 | |
| 937 | c_command = trim(command)//c_null_char |
| 938 | c_mode = 'r'//c_null_char |
| 939 | |
| 940 | pipe_ptr = c_popen(c_loc(c_command), c_loc(c_mode)) |
| 941 | if (.not. c_associated(pipe_ptr)) then |
| 942 | allocate(character(len=0) :: output) |
| 943 | return |
| 944 | end if |
| 945 | |
| 946 | temp_output = '' |
| 947 | pos = 1 |
| 948 | |
| 949 | do |
| 950 | buffer = c_null_char |
| 951 | ret_ptr = c_fgets(c_loc(buffer), int(4096, c_int), pipe_ptr) |
| 952 | if (.not. c_associated(ret_ptr)) exit |
| 953 | |
| 954 | bytes_read = 0 |
| 955 | do i = 1, 4096 |
| 956 | if (buffer(i) == c_null_char) exit |
| 957 | bytes_read = bytes_read + 1 |
| 958 | if (pos > len(temp_output)) exit |
| 959 | |
| 960 | if (buffer(i) == char(10)) then |
| 961 | ! Convert newline to tab (preserves spaces in filenames) |
| 962 | if (pos > 1 .and. temp_output(pos-1:pos-1) /= char(9)) then |
| 963 | temp_output(pos:pos) = char(9) |
| 964 | pos = pos + 1 |
| 965 | end if |
| 966 | else |
| 967 | temp_output(pos:pos) = buffer(i) |
| 968 | pos = pos + 1 |
| 969 | end if |
| 970 | end do |
| 971 | |
| 972 | if (pos > len(temp_output)) exit |
| 973 | if (bytes_read == 0) exit |
| 974 | end do |
| 975 | |
| 976 | i = c_pclose(pipe_ptr) |
| 977 | |
| 978 | if (allocated(output)) deallocate(output) |
| 979 | allocate(character(len=pos-1) :: output) |
| 980 | output = temp_output(:pos-1) |
| 981 | end function |
| 982 | |
| 983 | ! Terminal control functions |
| 984 | function enable_raw_mode(original_termios) result(success) |
| 985 | use iso_fortran_env, only: output_unit, error_unit |
| 986 | type(termios_t), intent(out) :: original_termios |
| 987 | logical :: success |
| 988 | type(termios_t) :: raw_termios |
| 989 | integer :: ret |
| 990 | logical :: mode_ok ! Workaround for potential LLVM Flang compiler bug |
| 991 | integer, save :: call_count = 0 |
| 992 | |
| 993 | success = .false. |
| 994 | mode_ok = .false. |
| 995 | |
| 996 | call_count = call_count + 1 |
| 997 | |
| 998 | ! Verify stdin is actually a TTY |
| 999 | if (c_isatty(STDIN_FD) == 0) then |
| 1000 | return |
| 1001 | end if |
| 1002 | |
| 1003 | ! Get current terminal settings |
| 1004 | ret = c_tcgetattr(STDIN_FD, original_termios) |
| 1005 | if (ret /= 0) then |
| 1006 | write(*, '(a,i15)') '[ERROR: tcgetattr failed: ', ret, ']' |
| 1007 | return |
| 1008 | end if |
| 1009 | |
| 1010 | ! Copy to modify for raw mode |
| 1011 | raw_termios = original_termios |
| 1012 | |
| 1013 | ! DEBUG: Commented out - too noisy for normal use |
| 1014 | |
| 1015 | ! Disable input processing that might consume control chars |
| 1016 | #ifdef __APPLE__ |
| 1017 | ! macOS: Disable IXON (Ctrl-S/Q flow control), IXOFF, IXANY, BRKINT |
| 1018 | raw_termios%c_iflag = iand(raw_termios%c_iflag, not(int(z'00000600', c_long))) ! IXON | IXOFF |
| 1019 | raw_termios%c_iflag = iand(raw_termios%c_iflag, not(int(z'00000800', c_long))) ! IXANY |
| 1020 | raw_termios%c_iflag = iand(raw_termios%c_iflag, not(int(z'00000002', c_long))) ! BRKINT |
| 1021 | #else |
| 1022 | ! Linux: Disable flow control |
| 1023 | raw_termios%c_iflag = iand(raw_termios%c_iflag, not(int(z'00000400', c_int))) ! IXON |
| 1024 | raw_termios%c_iflag = iand(raw_termios%c_iflag, not(int(z'00001000', c_int))) ! IXOFF |
| 1025 | raw_termios%c_iflag = iand(raw_termios%c_iflag, not(int(z'00000800', c_int))) ! IXANY |
| 1026 | raw_termios%c_iflag = iand(raw_termios%c_iflag, not(int(z'00000002', c_int))) ! BRKINT |
| 1027 | #endif |
| 1028 | |
| 1029 | ! Disable canonical mode, echo, and signals |
| 1030 | raw_termios%c_lflag = iand(raw_termios%c_lflag, not(ior(ior(ICANON, ECHO), ior(ECHOE, ECHOK)))) |
| 1031 | raw_termios%c_lflag = iand(raw_termios%c_lflag, not(ior(ior(ECHONL, IEXTEN), ISIG))) |
| 1032 | |
| 1033 | ! Also disable ECHOCTL which echoes control chars as ^C |
| 1034 | #ifdef __APPLE__ |
| 1035 | ! macOS ECHOCTL flag (0x40) |
| 1036 | raw_termios%c_lflag = iand(raw_termios%c_lflag, not(int(z'00000040', c_long))) |
| 1037 | #else |
| 1038 | ! Linux ECHOCTL flag (typically 0x200) |
| 1039 | raw_termios%c_lflag = iand(raw_termios%c_lflag, not(int(z'00000200', c_int))) |
| 1040 | #endif |
| 1041 | |
| 1042 | ! Set minimum characters and timeout for read |
| 1043 | raw_termios%c_cc(VMIN + 1) = char(1) ! Read at least 1 character |
| 1044 | raw_termios%c_cc(VTIME + 1) = char(0) ! No timeout |
| 1045 | |
| 1046 | #ifdef __APPLE__ |
| 1047 | ! Disable special character mappings that might intercept control chars |
| 1048 | ! With ISIG and ICANON disabled, most of these shouldn't matter, but |
| 1049 | ! explicitly clearing them ensures no control chars are intercepted |
| 1050 | raw_termios%c_cc(VINTR + 1) = char(0) ! Disable Ctrl-C (we handle it ourselves) |
| 1051 | raw_termios%c_cc(VQUIT + 1) = char(0) ! Disable Ctrl-\ quit |
| 1052 | raw_termios%c_cc(VSUSP + 1) = char(0) ! Disable Ctrl-Z suspend |
| 1053 | raw_termios%c_cc(VDSUSP + 1) = char(0) ! Disable delayed suspend |
| 1054 | raw_termios%c_cc(VSTART + 1) = char(0) ! Disable Ctrl-Q start (XON) |
| 1055 | raw_termios%c_cc(VSTOP + 1) = char(0) ! Disable Ctrl-S stop (XOFF) |
| 1056 | raw_termios%c_cc(VLNEXT + 1) = char(0) ! Disable literal next (Ctrl-V) |
| 1057 | raw_termios%c_cc(VDISCARD + 1) = char(0) ! Disable output discard |
| 1058 | raw_termios%c_cc(VWERASE + 1) = char(0) ! Disable word erase |
| 1059 | raw_termios%c_cc(VREPRINT + 1) = char(0) ! Disable reprint line |
| 1060 | ! Don't disable VEOF, VERASE, VKILL - we may want to check them |
| 1061 | #endif |
| 1062 | |
| 1063 | ! Apply raw mode settings - use TCSAFLUSH to discard pending input |
| 1064 | ! TCSAFLUSH is critical on macOS to ensure settings actually take effect |
| 1065 | ret = c_tcsetattr(STDIN_FD, TCSAFLUSH, raw_termios) |
| 1066 | ! DEBUG: Commented out - too noisy |
| 1067 | mode_ok = (ret == 0) |
| 1068 | ! DEBUG: Commented out - too noisy |
| 1069 | ! if (mode_ok) then |
| 1070 | ! else |
| 1071 | ! end if |
| 1072 | |
| 1073 | ! Verify flags were actually set |
| 1074 | ret = c_tcgetattr(STDIN_FD, raw_termios) |
| 1075 | if (ret == 0) then |
| 1076 | if (iand(raw_termios%c_lflag, ISIG) /= 0) then |
| 1077 | write(*, '(a)') '[BUG: ISIG still SET after tcsetattr!]' |
| 1078 | ! else |
| 1079 | end if |
| 1080 | if (iand(raw_termios%c_lflag, ICANON) /= 0) then |
| 1081 | write(*, '(a)') '[BUG: ICANON still SET!]' |
| 1082 | ! else |
| 1083 | end if |
| 1084 | ! DEBUG: Commented out - too noisy |
| 1085 | |
| 1086 | #ifdef __APPLE__ |
| 1087 | ! DEBUG: Commented out - too noisy |
| 1088 | #endif |
| 1089 | end if |
| 1090 | |
| 1091 | ! Assign to result variable at the very end |
| 1092 | success = mode_ok |
| 1093 | |
| 1094 | ! Enable bracketed paste mode (if raw mode succeeded). |
| 1095 | ! FORTSH_NO_BRACKETED_PASTE=1 disables the emit — a kill switch for |
| 1096 | ! bug triage on terminals that mishandle the mode (pattern #20). |
| 1097 | if (success) then |
| 1098 | block |
| 1099 | character(len=8) :: no_bp_env |
| 1100 | integer :: bp_stat |
| 1101 | logical :: bp_disabled |
| 1102 | call get_environment_variable('FORTSH_NO_BRACKETED_PASTE', no_bp_env, status=bp_stat) |
| 1103 | bp_disabled = (bp_stat == 0 .and. trim(no_bp_env) == '1') |
| 1104 | if (.not. bp_disabled) then |
| 1105 | ! ESC[?2004h = Enable bracketed paste |
| 1106 | ! Terminal will wrap pasted text in ESC[200~ ... ESC[201~ |
| 1107 | write(output_unit, '(A)', advance='no') char(27) // '[?2004h' |
| 1108 | flush(output_unit) |
| 1109 | end if |
| 1110 | end block |
| 1111 | |
| 1112 | ! Debug: Check if FORTSH_DEBUG_PASTE is set |
| 1113 | block |
| 1114 | character(len=16) :: debug_paste |
| 1115 | integer :: stat |
| 1116 | call get_environment_variable('FORTSH_DEBUG_PASTE', debug_paste, status=stat) |
| 1117 | if (stat == 0 .and. len_trim(debug_paste) > 0) then |
| 1118 | write(error_unit, '(A)') '[DEBUG: Bracketed paste mode ENABLED]' |
| 1119 | end if |
| 1120 | end block |
| 1121 | end if |
| 1122 | |
| 1123 | ! DEBUG: Commented out - too noisy |
| 1124 | ! if (success) then |
| 1125 | ! else |
| 1126 | ! end if |
| 1127 | end function |
| 1128 | |
| 1129 | function restore_terminal(original_termios) result(success) |
| 1130 | use iso_fortran_env, only: output_unit |
| 1131 | type(termios_t), intent(in) :: original_termios |
| 1132 | logical :: success |
| 1133 | integer :: ret |
| 1134 | character(len=8) :: no_bp_env |
| 1135 | integer :: bp_stat |
| 1136 | logical :: bp_disabled |
| 1137 | |
| 1138 | ! Disable bracketed paste mode before restoring terminal, |
| 1139 | ! unless FORTSH_NO_BRACKETED_PASTE=1 (we never enabled it). |
| 1140 | call get_environment_variable('FORTSH_NO_BRACKETED_PASTE', no_bp_env, status=bp_stat) |
| 1141 | bp_disabled = (bp_stat == 0 .and. trim(no_bp_env) == '1') |
| 1142 | if (.not. bp_disabled) then |
| 1143 | ! ESC[?2004l = Disable bracketed paste |
| 1144 | write(output_unit, '(A)', advance='no') char(27) // '[?2004l' |
| 1145 | flush(output_unit) |
| 1146 | end if |
| 1147 | |
| 1148 | ret = c_tcsetattr(STDIN_FD, TCSANOW, original_termios) |
| 1149 | success = (ret == 0) |
| 1150 | end function |
| 1151 | |
| 1152 | function read_single_char(ch) result(success) |
| 1153 | use iso_fortran_env, only: error_unit |
| 1154 | character, intent(out) :: ch |
| 1155 | logical :: success |
| 1156 | character(c_char), target :: c_ch |
| 1157 | integer(c_size_t) :: bytes_read |
| 1158 | |
| 1159 | |
| 1160 | bytes_read = c_read(STDIN_FD, c_loc(c_ch), 1_c_size_t) |
| 1161 | |
| 1162 | success = (bytes_read == 1) |
| 1163 | if (success) then |
| 1164 | ch = c_ch |
| 1165 | else |
| 1166 | ch = char(0) |
| 1167 | end if |
| 1168 | end function |
| 1169 | |
| 1170 | ! Read a complete UTF-8 character (1-4 bytes) |
| 1171 | ! Returns the character in utf8_char and the number of bytes read |
| 1172 | function read_utf8_char(utf8_char, num_bytes) result(success) |
| 1173 | character(len=4), intent(out) :: utf8_char |
| 1174 | integer, intent(out) :: num_bytes |
| 1175 | logical :: success |
| 1176 | character(c_char), target :: bytes(4) |
| 1177 | integer(c_size_t) :: bytes_read |
| 1178 | integer :: lead_byte_val, i, expected_bytes |
| 1179 | |
| 1180 | ! Initialize output |
| 1181 | utf8_char = '' |
| 1182 | num_bytes = 0 |
| 1183 | |
| 1184 | ! Read first byte |
| 1185 | bytes_read = c_read(STDIN_FD, c_loc(bytes(1)), 1_c_size_t) |
| 1186 | if (bytes_read /= 1) then |
| 1187 | success = .false. |
| 1188 | return |
| 1189 | end if |
| 1190 | |
| 1191 | ! Get value of first byte (0-255) |
| 1192 | lead_byte_val = iand(iachar(bytes(1)), 255) |
| 1193 | |
| 1194 | ! Determine how many bytes this UTF-8 character should have |
| 1195 | if (lead_byte_val < 128) then |
| 1196 | ! ASCII character (0x00-0x7F): 1 byte |
| 1197 | expected_bytes = 1 |
| 1198 | else if (iand(lead_byte_val, 224) == 192) then |
| 1199 | ! 2-byte UTF-8 (0xC0-0xDF) |
| 1200 | expected_bytes = 2 |
| 1201 | else if (iand(lead_byte_val, 240) == 224) then |
| 1202 | ! 3-byte UTF-8 (0xE0-0xEF) |
| 1203 | expected_bytes = 3 |
| 1204 | else if (iand(lead_byte_val, 248) == 240) then |
| 1205 | ! 4-byte UTF-8 (0xF0-0xF7) |
| 1206 | expected_bytes = 4 |
| 1207 | else |
| 1208 | ! Invalid UTF-8 lead byte - treat as single byte |
| 1209 | expected_bytes = 1 |
| 1210 | end if |
| 1211 | |
| 1212 | ! Read continuation bytes if needed |
| 1213 | if (expected_bytes > 1) then |
| 1214 | do i = 2, expected_bytes |
| 1215 | bytes_read = c_read(STDIN_FD, c_loc(bytes(i)), 1_c_size_t) |
| 1216 | if (bytes_read /= 1) then |
| 1217 | ! Failed to read continuation byte - return what we have |
| 1218 | success = .false. |
| 1219 | return |
| 1220 | end if |
| 1221 | end do |
| 1222 | end if |
| 1223 | |
| 1224 | ! Copy bytes to output string |
| 1225 | do i = 1, expected_bytes |
| 1226 | utf8_char(i:i) = bytes(i) |
| 1227 | end do |
| 1228 | |
| 1229 | num_bytes = expected_bytes |
| 1230 | success = .true. |
| 1231 | end function read_utf8_char |
| 1232 | |
| 1233 | ! Get current process ID |
| 1234 | function get_pid() result(pid) |
| 1235 | integer(c_pid_t) :: pid |
| 1236 | pid = c_getpid() |
| 1237 | end function |
| 1238 | |
| 1239 | ! Get parent process ID |
| 1240 | function get_ppid() result(ppid) |
| 1241 | integer(c_pid_t) :: ppid |
| 1242 | ppid = c_getppid() |
| 1243 | end function |
| 1244 | |
| 1245 | function get_uid() result(uid) |
| 1246 | integer :: uid |
| 1247 | uid = int(c_getuid()) |
| 1248 | end function |
| 1249 | |
| 1250 | function get_euid() result(euid) |
| 1251 | integer :: euid |
| 1252 | euid = int(c_geteuid()) |
| 1253 | end function |
| 1254 | |
| 1255 | ! File test functions for test builtin support |
| 1256 | ! On aarch64 Linux, struct stat layout differs from x86_64 (mode/nlink swapped, |
| 1257 | ! different field sizes). USE_C_STAT routes through C helpers that use system headers. |
| 1258 | function file_exists(path) result(exists) |
| 1259 | character(len=*), intent(in) :: path |
| 1260 | logical :: exists |
| 1261 | character(len=256), target :: c_path |
| 1262 | #ifdef USE_C_STAT |
| 1263 | integer :: mode |
| 1264 | c_path = trim(path)//c_null_char |
| 1265 | mode = fortsh_stat_mode(c_loc(c_path)) |
| 1266 | exists = (mode >= 0) |
| 1267 | #else |
| 1268 | integer :: ret |
| 1269 | type(stat_t) :: statbuf |
| 1270 | c_path = trim(path)//c_null_char |
| 1271 | ret = c_stat(c_loc(c_path), statbuf) |
| 1272 | exists = (ret == 0) |
| 1273 | #endif |
| 1274 | end function |
| 1275 | |
| 1276 | function file_is_regular(path) result(is_reg) |
| 1277 | character(len=*), intent(in) :: path |
| 1278 | logical :: is_reg |
| 1279 | character(len=256), target :: c_path |
| 1280 | #ifdef USE_C_STAT |
| 1281 | integer :: mode |
| 1282 | c_path = trim(path)//c_null_char |
| 1283 | mode = fortsh_stat_mode(c_loc(c_path)) |
| 1284 | is_reg = (mode >= 0 .and. iand(mode, S_IFMT) == S_IFREG) |
| 1285 | #else |
| 1286 | integer :: ret |
| 1287 | type(stat_t) :: statbuf |
| 1288 | c_path = trim(path)//c_null_char |
| 1289 | ret = c_stat(c_loc(c_path), statbuf) |
| 1290 | is_reg = (ret == 0 .and. iand(int(statbuf%st_mode, c_int), S_IFMT) == S_IFREG) |
| 1291 | #endif |
| 1292 | end function |
| 1293 | |
| 1294 | function file_is_directory(path) result(is_dir) |
| 1295 | character(len=*), intent(in) :: path |
| 1296 | logical :: is_dir |
| 1297 | character(len=256), target :: c_path |
| 1298 | #ifdef USE_C_STAT |
| 1299 | integer :: mode |
| 1300 | c_path = trim(path)//c_null_char |
| 1301 | mode = fortsh_stat_mode(c_loc(c_path)) |
| 1302 | is_dir = (mode >= 0 .and. iand(mode, S_IFMT) == S_IFDIR) |
| 1303 | #else |
| 1304 | integer :: ret |
| 1305 | type(stat_t) :: statbuf |
| 1306 | c_path = trim(path)//c_null_char |
| 1307 | ret = c_stat(c_loc(c_path), statbuf) |
| 1308 | is_dir = (ret == 0 .and. iand(int(statbuf%st_mode, c_int), S_IFMT) == S_IFDIR) |
| 1309 | #endif |
| 1310 | end function |
| 1311 | |
| 1312 | function file_is_symlink(path) result(is_link) |
| 1313 | character(len=*), intent(in) :: path |
| 1314 | logical :: is_link |
| 1315 | character(len=256), target :: c_path |
| 1316 | #ifdef USE_C_STAT |
| 1317 | integer :: mode |
| 1318 | c_path = trim(path)//c_null_char |
| 1319 | mode = fortsh_lstat_mode(c_loc(c_path)) |
| 1320 | is_link = (mode >= 0 .and. iand(mode, S_IFMT) == S_IFLNK) |
| 1321 | #else |
| 1322 | integer :: ret |
| 1323 | type(stat_t) :: statbuf |
| 1324 | c_path = trim(path)//c_null_char |
| 1325 | ret = c_lstat(c_loc(c_path), statbuf) |
| 1326 | is_link = (ret == 0 .and. iand(int(statbuf%st_mode, c_int), S_IFMT) == S_IFLNK) |
| 1327 | #endif |
| 1328 | end function |
| 1329 | |
| 1330 | function file_is_block_device(path) result(is_blk) |
| 1331 | character(len=*), intent(in) :: path |
| 1332 | logical :: is_blk |
| 1333 | character(len=256), target :: c_path |
| 1334 | #ifdef USE_C_STAT |
| 1335 | integer :: mode |
| 1336 | c_path = trim(path)//c_null_char |
| 1337 | mode = fortsh_stat_mode(c_loc(c_path)) |
| 1338 | is_blk = (mode >= 0 .and. iand(mode, S_IFMT) == S_IFBLK) |
| 1339 | #else |
| 1340 | integer :: ret |
| 1341 | type(stat_t) :: statbuf |
| 1342 | c_path = trim(path)//c_null_char |
| 1343 | ret = c_stat(c_loc(c_path), statbuf) |
| 1344 | is_blk = (ret == 0 .and. iand(int(statbuf%st_mode, c_int), S_IFMT) == S_IFBLK) |
| 1345 | #endif |
| 1346 | end function |
| 1347 | |
| 1348 | function file_is_char_device(path) result(is_chr) |
| 1349 | character(len=*), intent(in) :: path |
| 1350 | logical :: is_chr |
| 1351 | character(len=256), target :: c_path |
| 1352 | #ifdef USE_C_STAT |
| 1353 | integer :: mode |
| 1354 | c_path = trim(path)//c_null_char |
| 1355 | mode = fortsh_stat_mode(c_loc(c_path)) |
| 1356 | is_chr = (mode >= 0 .and. iand(mode, S_IFMT) == S_IFCHR) |
| 1357 | #else |
| 1358 | integer :: ret |
| 1359 | type(stat_t) :: statbuf |
| 1360 | c_path = trim(path)//c_null_char |
| 1361 | ret = c_stat(c_loc(c_path), statbuf) |
| 1362 | is_chr = (ret == 0 .and. iand(int(statbuf%st_mode, c_int), S_IFMT) == S_IFCHR) |
| 1363 | #endif |
| 1364 | end function |
| 1365 | |
| 1366 | function file_is_fifo(path) result(is_fifo) |
| 1367 | character(len=*), intent(in) :: path |
| 1368 | logical :: is_fifo |
| 1369 | character(len=256), target :: c_path |
| 1370 | #ifdef USE_C_STAT |
| 1371 | integer :: mode |
| 1372 | c_path = trim(path)//c_null_char |
| 1373 | mode = fortsh_stat_mode(c_loc(c_path)) |
| 1374 | is_fifo = (mode >= 0 .and. iand(mode, S_IFMT) == S_IFIFO) |
| 1375 | #else |
| 1376 | integer :: ret |
| 1377 | type(stat_t) :: statbuf |
| 1378 | c_path = trim(path)//c_null_char |
| 1379 | ret = c_stat(c_loc(c_path), statbuf) |
| 1380 | is_fifo = (ret == 0 .and. iand(int(statbuf%st_mode, c_int), S_IFMT) == S_IFIFO) |
| 1381 | #endif |
| 1382 | end function |
| 1383 | |
| 1384 | function file_is_socket(path) result(is_sock) |
| 1385 | character(len=*), intent(in) :: path |
| 1386 | logical :: is_sock |
| 1387 | character(len=256), target :: c_path |
| 1388 | #ifdef USE_C_STAT |
| 1389 | integer :: mode |
| 1390 | c_path = trim(path)//c_null_char |
| 1391 | mode = fortsh_stat_mode(c_loc(c_path)) |
| 1392 | is_sock = (mode >= 0 .and. iand(mode, S_IFMT) == S_IFSOCK) |
| 1393 | #else |
| 1394 | integer :: ret |
| 1395 | type(stat_t) :: statbuf |
| 1396 | c_path = trim(path)//c_null_char |
| 1397 | ret = c_stat(c_loc(c_path), statbuf) |
| 1398 | is_sock = (ret == 0 .and. iand(int(statbuf%st_mode, c_int), S_IFMT) == S_IFSOCK) |
| 1399 | #endif |
| 1400 | end function |
| 1401 | |
| 1402 | function file_is_readable(path) result(is_readable) |
| 1403 | character(len=*), intent(in) :: path |
| 1404 | logical :: is_readable |
| 1405 | character(len=256), target :: c_path |
| 1406 | integer :: ret |
| 1407 | |
| 1408 | c_path = trim(path)//c_null_char |
| 1409 | ret = c_access(c_loc(c_path), R_OK) |
| 1410 | is_readable = (ret == 0) |
| 1411 | end function |
| 1412 | |
| 1413 | function file_is_writable(path) result(is_writable) |
| 1414 | character(len=*), intent(in) :: path |
| 1415 | logical :: is_writable |
| 1416 | character(len=256), target :: c_path |
| 1417 | integer :: ret |
| 1418 | |
| 1419 | c_path = trim(path)//c_null_char |
| 1420 | ret = c_access(c_loc(c_path), W_OK) |
| 1421 | is_writable = (ret == 0) |
| 1422 | end function |
| 1423 | |
| 1424 | function file_is_executable(path) result(is_exec) |
| 1425 | character(len=*), intent(in) :: path |
| 1426 | logical :: is_exec |
| 1427 | character(len=256), target :: c_path |
| 1428 | integer :: ret |
| 1429 | |
| 1430 | c_path = trim(path)//c_null_char |
| 1431 | ret = c_access(c_loc(c_path), X_OK) |
| 1432 | is_exec = (ret == 0) |
| 1433 | end function |
| 1434 | |
| 1435 | function file_has_suid(path) result(has_suid) |
| 1436 | character(len=*), intent(in) :: path |
| 1437 | logical :: has_suid |
| 1438 | character(len=256), target :: c_path |
| 1439 | #ifdef USE_C_STAT |
| 1440 | integer :: mode |
| 1441 | c_path = trim(path)//c_null_char |
| 1442 | mode = fortsh_stat_mode(c_loc(c_path)) |
| 1443 | has_suid = (mode >= 0 .and. iand(mode, S_ISUID) /= 0) |
| 1444 | #else |
| 1445 | integer :: ret |
| 1446 | type(stat_t) :: statbuf |
| 1447 | c_path = trim(path)//c_null_char |
| 1448 | ret = c_stat(c_loc(c_path), statbuf) |
| 1449 | has_suid = (ret == 0 .and. iand(int(statbuf%st_mode, c_int), S_ISUID) /= 0) |
| 1450 | #endif |
| 1451 | end function |
| 1452 | |
| 1453 | function file_has_sgid(path) result(has_sgid) |
| 1454 | character(len=*), intent(in) :: path |
| 1455 | logical :: has_sgid |
| 1456 | character(len=256), target :: c_path |
| 1457 | #ifdef USE_C_STAT |
| 1458 | integer :: mode |
| 1459 | c_path = trim(path)//c_null_char |
| 1460 | mode = fortsh_stat_mode(c_loc(c_path)) |
| 1461 | has_sgid = (mode >= 0 .and. iand(mode, S_ISGID) /= 0) |
| 1462 | #else |
| 1463 | integer :: ret |
| 1464 | type(stat_t) :: statbuf |
| 1465 | c_path = trim(path)//c_null_char |
| 1466 | ret = c_stat(c_loc(c_path), statbuf) |
| 1467 | has_sgid = (ret == 0 .and. iand(int(statbuf%st_mode, c_int), S_ISGID) /= 0) |
| 1468 | #endif |
| 1469 | end function |
| 1470 | |
| 1471 | function file_has_sticky(path) result(has_sticky) |
| 1472 | character(len=*), intent(in) :: path |
| 1473 | logical :: has_sticky |
| 1474 | character(len=256), target :: c_path |
| 1475 | #ifdef USE_C_STAT |
| 1476 | integer :: mode |
| 1477 | c_path = trim(path)//c_null_char |
| 1478 | mode = fortsh_stat_mode(c_loc(c_path)) |
| 1479 | has_sticky = (mode >= 0 .and. iand(mode, S_ISVTX) /= 0) |
| 1480 | #else |
| 1481 | integer :: ret |
| 1482 | type(stat_t) :: statbuf |
| 1483 | c_path = trim(path)//c_null_char |
| 1484 | ret = c_stat(c_loc(c_path), statbuf) |
| 1485 | has_sticky = (ret == 0 .and. iand(int(statbuf%st_mode, c_int), S_ISVTX) /= 0) |
| 1486 | #endif |
| 1487 | end function |
| 1488 | |
| 1489 | function file_has_size(path) result(has_size) |
| 1490 | character(len=*), intent(in) :: path |
| 1491 | logical :: has_size |
| 1492 | character(len=256), target :: c_path |
| 1493 | #ifdef USE_C_STAT |
| 1494 | integer(c_long_long) :: sz |
| 1495 | c_path = trim(path)//c_null_char |
| 1496 | sz = fortsh_stat_size(c_loc(c_path)) |
| 1497 | has_size = (sz > 0) |
| 1498 | #else |
| 1499 | integer :: ret |
| 1500 | type(stat_t) :: statbuf |
| 1501 | c_path = trim(path)//c_null_char |
| 1502 | ret = c_stat(c_loc(c_path), statbuf) |
| 1503 | has_size = (ret == 0 .and. statbuf%st_size > 0) |
| 1504 | #endif |
| 1505 | end function |
| 1506 | |
| 1507 | function file_owned_by_euid(path) result(is_owned) |
| 1508 | character(len=*), intent(in) :: path |
| 1509 | logical :: is_owned |
| 1510 | character(len=256), target :: c_path |
| 1511 | #ifdef USE_C_STAT |
| 1512 | integer :: uid |
| 1513 | c_path = trim(path)//c_null_char |
| 1514 | uid = fortsh_stat_uid(c_loc(c_path)) |
| 1515 | is_owned = (uid >= 0 .and. uid == c_geteuid()) |
| 1516 | #else |
| 1517 | integer :: ret |
| 1518 | type(stat_t) :: statbuf |
| 1519 | c_path = trim(path)//c_null_char |
| 1520 | ret = c_stat(c_loc(c_path), statbuf) |
| 1521 | is_owned = (ret == 0 .and. statbuf%st_uid == c_geteuid()) |
| 1522 | #endif |
| 1523 | end function |
| 1524 | |
| 1525 | function file_owned_by_egid(path) result(is_owned) |
| 1526 | character(len=*), intent(in) :: path |
| 1527 | logical :: is_owned |
| 1528 | ! Note: getegid() not declared yet, so we'll skip this check for now |
| 1529 | ! This should be added when getegid() is available |
| 1530 | is_owned = .false. |
| 1531 | if (.false.) print *, path ! Silence unused warning |
| 1532 | end function |
| 1533 | |
| 1534 | function file_is_newer(file1, file2) result(is_newer) |
| 1535 | character(len=*), intent(in) :: file1, file2 |
| 1536 | logical :: is_newer |
| 1537 | character(len=256), target :: c_path1, c_path2 |
| 1538 | #ifdef USE_C_STAT |
| 1539 | integer(c_long_long) :: mt1, mt2 |
| 1540 | c_path1 = trim(file1)//c_null_char |
| 1541 | c_path2 = trim(file2)//c_null_char |
| 1542 | mt1 = fortsh_stat_mtime(c_loc(c_path1)) |
| 1543 | mt2 = fortsh_stat_mtime(c_loc(c_path2)) |
| 1544 | is_newer = (mt1 >= 0 .and. mt2 >= 0 .and. mt1 > mt2) |
| 1545 | #else |
| 1546 | integer :: ret1, ret2 |
| 1547 | type(stat_t) :: stat1, stat2 |
| 1548 | c_path1 = trim(file1)//c_null_char |
| 1549 | c_path2 = trim(file2)//c_null_char |
| 1550 | ret1 = c_stat(c_loc(c_path1), stat1) |
| 1551 | ret2 = c_stat(c_loc(c_path2), stat2) |
| 1552 | #ifdef __APPLE__ |
| 1553 | is_newer = (ret1 == 0 .and. ret2 == 0 .and. stat1%st_mtimespec_sec > stat2%st_mtimespec_sec) |
| 1554 | #else |
| 1555 | is_newer = (ret1 == 0 .and. ret2 == 0 .and. stat1%st_mtime > stat2%st_mtime) |
| 1556 | #endif |
| 1557 | #endif |
| 1558 | end function |
| 1559 | |
| 1560 | function file_is_older(file1, file2) result(is_older) |
| 1561 | character(len=*), intent(in) :: file1, file2 |
| 1562 | logical :: is_older |
| 1563 | character(len=256), target :: c_path1, c_path2 |
| 1564 | #ifdef USE_C_STAT |
| 1565 | integer(c_long_long) :: mt1, mt2 |
| 1566 | c_path1 = trim(file1)//c_null_char |
| 1567 | c_path2 = trim(file2)//c_null_char |
| 1568 | mt1 = fortsh_stat_mtime(c_loc(c_path1)) |
| 1569 | mt2 = fortsh_stat_mtime(c_loc(c_path2)) |
| 1570 | is_older = (mt1 >= 0 .and. mt2 >= 0 .and. mt1 < mt2) |
| 1571 | #else |
| 1572 | integer :: ret1, ret2 |
| 1573 | type(stat_t) :: stat1, stat2 |
| 1574 | c_path1 = trim(file1)//c_null_char |
| 1575 | c_path2 = trim(file2)//c_null_char |
| 1576 | ret1 = c_stat(c_loc(c_path1), stat1) |
| 1577 | ret2 = c_stat(c_loc(c_path2), stat2) |
| 1578 | #ifdef __APPLE__ |
| 1579 | is_older = (ret1 == 0 .and. ret2 == 0 .and. stat1%st_mtimespec_sec < stat2%st_mtimespec_sec) |
| 1580 | #else |
| 1581 | is_older = (ret1 == 0 .and. ret2 == 0 .and. stat1%st_mtime < stat2%st_mtime) |
| 1582 | #endif |
| 1583 | #endif |
| 1584 | end function |
| 1585 | |
| 1586 | function file_same_as(file1, file2) result(is_same) |
| 1587 | character(len=*), intent(in) :: file1, file2 |
| 1588 | logical :: is_same |
| 1589 | character(len=256), target :: c_path1, c_path2 |
| 1590 | #ifdef USE_C_STAT |
| 1591 | integer(c_long_long) :: dev1, dev2, ino1, ino2 |
| 1592 | c_path1 = trim(file1)//c_null_char |
| 1593 | c_path2 = trim(file2)//c_null_char |
| 1594 | dev1 = fortsh_stat_dev(c_loc(c_path1)) |
| 1595 | dev2 = fortsh_stat_dev(c_loc(c_path2)) |
| 1596 | ino1 = fortsh_stat_ino(c_loc(c_path1)) |
| 1597 | ino2 = fortsh_stat_ino(c_loc(c_path2)) |
| 1598 | is_same = (dev1 >= 0 .and. dev2 >= 0 .and. dev1 == dev2 .and. ino1 == ino2) |
| 1599 | #else |
| 1600 | integer :: ret1, ret2 |
| 1601 | type(stat_t) :: stat1, stat2 |
| 1602 | c_path1 = trim(file1)//c_null_char |
| 1603 | c_path2 = trim(file2)//c_null_char |
| 1604 | ret1 = c_stat(c_loc(c_path1), stat1) |
| 1605 | ret2 = c_stat(c_loc(c_path2), stat2) |
| 1606 | is_same = (ret1 == 0 .and. ret2 == 0 .and. & |
| 1607 | stat1%st_dev == stat2%st_dev .and. & |
| 1608 | stat1%st_ino == stat2%st_ino) |
| 1609 | #endif |
| 1610 | end function |
| 1611 | |
| 1612 | ! Create a named pipe (FIFO) |
| 1613 | function create_fifo(path, mode) result(success) |
| 1614 | character(len=*), intent(in) :: path |
| 1615 | integer, intent(in), optional :: mode |
| 1616 | logical :: success |
| 1617 | character(len=256), target :: c_path |
| 1618 | integer(c_int) :: ret |
| 1619 | integer(c_int) :: fifo_mode |
| 1620 | |
| 1621 | ! Default mode is 0600 (read/write for owner only) |
| 1622 | if (present(mode)) then |
| 1623 | fifo_mode = int(mode, c_int) |
| 1624 | else |
| 1625 | fifo_mode = ior(S_IRUSR, S_IWUSR) |
| 1626 | end if |
| 1627 | |
| 1628 | c_path = trim(path)//c_null_char |
| 1629 | ret = c_mkfifo(c_loc(c_path), fifo_mode) |
| 1630 | success = (ret == 0) |
| 1631 | end function |
| 1632 | |
| 1633 | ! Remove a file or FIFO |
| 1634 | function remove_file(path) result(success) |
| 1635 | character(len=*), intent(in) :: path |
| 1636 | logical :: success |
| 1637 | character(len=256), target :: c_path |
| 1638 | integer :: ret |
| 1639 | |
| 1640 | c_path = trim(path)//c_null_char |
| 1641 | ret = c_unlink(c_loc(c_path)) |
| 1642 | success = (ret == 0) |
| 1643 | end function |
| 1644 | |
| 1645 | ! Initialize signal handler constants |
| 1646 | ! Must be called before using SIG_DFL or SIG_IGN |
| 1647 | subroutine init_signal_constants() |
| 1648 | ! SIG_DFL is (void(*)())0 which is c_null_funptr |
| 1649 | SIG_DFL = c_null_funptr |
| 1650 | ! SIG_IGN is (void(*)())1, use transfer to convert integer to c_funptr |
| 1651 | SIG_IGN = transfer(1_c_intptr_t, SIG_IGN) |
| 1652 | end subroutine |
| 1653 | |
| 1654 | ! Get terminal size (rows and columns) |
| 1655 | function get_terminal_size(rows, cols) result(success) |
| 1656 | use iso_fortran_env, only: error_unit |
| 1657 | integer, intent(out) :: rows, cols |
| 1658 | logical :: success |
| 1659 | type(winsize_t), target :: ws |
| 1660 | integer(c_int) :: ret, c_rows, c_cols |
| 1661 | character(len=16) :: debug_env |
| 1662 | integer :: stat |
| 1663 | |
| 1664 | ! Try using C wrapper first (more reliable) |
| 1665 | c_rows = 0 |
| 1666 | c_cols = 0 |
| 1667 | ret = get_term_size_c(c_rows, c_cols) |
| 1668 | |
| 1669 | call get_environment_variable('FORTSH_DEBUG_WINSIZE', debug_env, status=stat) |
| 1670 | if (stat == 0 .and. len_trim(debug_env) > 0) then |
| 1671 | write(error_unit, '(A,I0,A,I0,A,I0)') '[DEBUG: C wrapper ret=', ret, ' rows=', c_rows, ' cols=', c_cols |
| 1672 | end if |
| 1673 | |
| 1674 | if (ret == 0 .and. c_rows > 0 .and. c_cols > 0) then |
| 1675 | rows = int(c_rows) |
| 1676 | cols = int(c_cols) |
| 1677 | success = .true. |
| 1678 | return |
| 1679 | end if |
| 1680 | |
| 1681 | ! Fallback to direct ioctl if C wrapper fails |
| 1682 | ! Initialize structure to zero |
| 1683 | ws%ws_row = 0 |
| 1684 | ws%ws_col = 0 |
| 1685 | ws%ws_xpixel = 0 |
| 1686 | ws%ws_ypixel = 0 |
| 1687 | |
| 1688 | ! Debug: Check if FDs are actually TTYs |
| 1689 | call get_environment_variable('FORTSH_DEBUG_WINSIZE', debug_env, status=stat) |
| 1690 | if (stat == 0 .and. len_trim(debug_env) > 0) then |
| 1691 | write(error_unit, '(A,I0,A,I0,A,I0)') '[DEBUG: isatty(0)=', c_isatty(STDIN_FD), & |
| 1692 | ' isatty(1)=', c_isatty(STDOUT_FD), ' isatty(2)=', c_isatty(STDERR_FD) |
| 1693 | end if |
| 1694 | |
| 1695 | ! Try to get window size using ioctl |
| 1696 | ! Try stdout first, then stderr if stdout gives 0 dimensions |
| 1697 | ret = c_ioctl(STDOUT_FD, TIOCGWINSZ, c_loc(ws)) |
| 1698 | |
| 1699 | ! Debug output |
| 1700 | call get_environment_variable('FORTSH_DEBUG_WINSIZE', debug_env, status=stat) |
| 1701 | if (stat == 0 .and. len_trim(debug_env) > 0) then |
| 1702 | write(error_unit, '(A,I0,A,I0,A,I0)') '[DEBUG: ioctl(STDOUT) ret=', ret, ' rows=', ws%ws_row, ' cols=', ws%ws_col |
| 1703 | end if |
| 1704 | |
| 1705 | ! If stdout doesn't give valid dimensions, try stderr |
| 1706 | if (ret /= 0 .or. ws%ws_row == 0 .or. ws%ws_col == 0) then |
| 1707 | ws%ws_row = 0 |
| 1708 | ws%ws_col = 0 |
| 1709 | ret = c_ioctl(STDERR_FD, TIOCGWINSZ, c_loc(ws)) |
| 1710 | |
| 1711 | call get_environment_variable('FORTSH_DEBUG_WINSIZE', debug_env, status=stat) |
| 1712 | if (stat == 0 .and. len_trim(debug_env) > 0) then |
| 1713 | write(error_unit, '(A,I0,A,I0,A,I0)') '[DEBUG: ioctl(STDERR) ret=', ret, ' rows=', ws%ws_row, ' cols=', ws%ws_col |
| 1714 | end if |
| 1715 | end if |
| 1716 | |
| 1717 | ! If stderr also doesn't work, try stdin |
| 1718 | if (ret /= 0 .or. ws%ws_row == 0 .or. ws%ws_col == 0) then |
| 1719 | ws%ws_row = 0 |
| 1720 | ws%ws_col = 0 |
| 1721 | ret = c_ioctl(STDIN_FD, TIOCGWINSZ, c_loc(ws)) |
| 1722 | |
| 1723 | call get_environment_variable('FORTSH_DEBUG_WINSIZE', debug_env, status=stat) |
| 1724 | if (stat == 0 .and. len_trim(debug_env) > 0) then |
| 1725 | write(error_unit, '(A,I0,A,I0,A,I0)') '[DEBUG: ioctl(STDIN) ret=', ret, ' rows=', ws%ws_row, ' cols=', ws%ws_col |
| 1726 | end if |
| 1727 | end if |
| 1728 | |
| 1729 | if (ret == 0 .and. ws%ws_row > 0 .and. ws%ws_col > 0) then |
| 1730 | rows = int(ws%ws_row) |
| 1731 | cols = int(ws%ws_col) |
| 1732 | success = .true. |
| 1733 | else |
| 1734 | ! Fallback to common defaults if ioctl fails |
| 1735 | rows = 24 |
| 1736 | cols = 80 |
| 1737 | success = .false. |
| 1738 | end if |
| 1739 | end function |
| 1740 | |
| 1741 | ! Check if a path is a directory |
| 1742 | function test_is_directory(path) result(is_dir) |
| 1743 | character(len=*), intent(in) :: path |
| 1744 | logical :: is_dir |
| 1745 | character(len=len(path)+1), target :: c_path |
| 1746 | #ifdef USE_C_STAT |
| 1747 | integer :: mode |
| 1748 | is_dir = .false. |
| 1749 | c_path = trim(path) // c_null_char |
| 1750 | mode = fortsh_stat_mode(c_loc(c_path)) |
| 1751 | is_dir = (mode >= 0 .and. iand(mode, S_IFDIR) /= 0) |
| 1752 | #else |
| 1753 | integer :: stat_result |
| 1754 | type(stat_t) :: file_stat |
| 1755 | is_dir = .false. |
| 1756 | c_path = trim(path) // c_null_char |
| 1757 | stat_result = c_stat(c_loc(c_path), file_stat) |
| 1758 | if (stat_result == 0) then |
| 1759 | is_dir = iand(int(file_stat%st_mode, c_int), S_IFDIR) /= 0 |
| 1760 | end if |
| 1761 | #endif |
| 1762 | end function |
| 1763 | |
| 1764 | ! Set terminal title using OSC sequences |
| 1765 | ! OSC 0 ; title BEL sets both icon and window title |
| 1766 | subroutine set_terminal_title(title) |
| 1767 | use iso_fortran_env, only: output_unit |
| 1768 | character(len=*), intent(in) :: title |
| 1769 | ! ESC ] 0 ; title BEL |
| 1770 | write(output_unit, '(A)', advance='no') char(27) // ']0;' // trim(title) // char(7) |
| 1771 | flush(output_unit) |
| 1772 | end subroutine |
| 1773 | |
| 1774 | ! Check if terminal supports ANSI escape codes |
| 1775 | function terminal_supports_ansi() result(supports) |
| 1776 | logical :: supports |
| 1777 | character(len=256) :: term_type |
| 1778 | integer :: status |
| 1779 | |
| 1780 | call get_environment_variable('TERM', term_type, status=status) |
| 1781 | |
| 1782 | if (status /= 0 .or. len_trim(term_type) == 0) then |
| 1783 | ! No TERM set - assume dumb terminal |
| 1784 | supports = .false. |
| 1785 | return |
| 1786 | end if |
| 1787 | |
| 1788 | ! Known dumb/non-ANSI terminals |
| 1789 | select case (trim(term_type)) |
| 1790 | case ('dumb', 'unknown', 'cons25') |
| 1791 | supports = .false. |
| 1792 | case default |
| 1793 | supports = .true. |
| 1794 | end select |
| 1795 | end function terminal_supports_ansi |
| 1796 | |
| 1797 | end module system_interface |