| 1 | #include "beos/beosish.h" |
| 2 | |
| 3 | #undef waitpid |
| 4 | #undef kill |
| 5 | #undef sigaction |
| 6 | |
| 7 | #include <errno.h> |
| 8 | #include <signal.h> |
| 9 | #include <stdio.h> |
| 10 | #include <stdlib.h> |
| 11 | #include <unistd.h> |
| 12 | #include <sys/wait.h> |
| 13 | |
| 14 | #include <OS.h> |
| 15 | |
| 16 | /* In BeOS 5.0 the waitpid() seems to misbehave in that the status |
| 17 | * has the upper and lower bytes swapped compared with the usual |
| 18 | * POSIX/UNIX implementations. To undo the surpise effect to the |
| 19 | * rest of Perl we need this wrapper. (The rest of BeOS might be |
| 20 | * surprised because of this, though.) */ |
| 21 | |
| 22 | pid_t beos_waitpid(pid_t process_id, int *status_location, int options) { |
| 23 | pid_t got = waitpid(process_id, status_location, options); |
| 24 | if (status_location) |
| 25 | *status_location = |
| 26 | (*status_location & 0x00FF) << 8 | |
| 27 | (*status_location & 0xFF00) >> 8; |
| 28 | return got; |
| 29 | } |
| 30 | |
| 31 | |
| 32 | /* BeOS kill() doesn't like the combination of the pseudo-signal 0 and |
| 33 | * specifying a process group (i.e. pid < -1 || pid == 0). We work around |
| 34 | * by changing pid to the respective process group leader. That should work |
| 35 | * well enough in most cases. */ |
| 36 | |
| 37 | int beos_kill(pid_t pid, int sig) |
| 38 | { |
| 39 | if (sig == 0) { |
| 40 | if (pid == 0) { |
| 41 | /* it's our process group */ |
| 42 | pid = getpgrp(); |
| 43 | } else if (pid < -1) { |
| 44 | /* just address the process group leader */ |
| 45 | pid = -pid; |
| 46 | } |
| 47 | } |
| 48 | |
| 49 | return kill(pid, sig); |
| 50 | } |
| 51 | |
| 52 | /* sigaction() should fail, if trying to ignore or install a signal handler |
| 53 | * for a signal that cannot be caught or ignored. The BeOS R5 sigaction() |
| 54 | * doesn't return an error, though. */ |
| 55 | int beos_sigaction(int sig, const struct sigaction *act, |
| 56 | struct sigaction *oact) |
| 57 | { |
| 58 | int result = sigaction(sig, act, oact); |
| 59 | |
| 60 | if (result == 0 && act && act->sa_handler != SIG_DFL |
| 61 | && act->sa_handler != SIG_ERR && (sig == SIGKILL || sig == SIGSTOP)) { |
| 62 | result = -1; |
| 63 | errno = EINVAL; |
| 64 | } |
| 65 | |
| 66 | return result; |
| 67 | } |