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add file actions support to posix_spawn

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This commit is contained in:
Rich Felker
2011-05-28 23:30:47 -04:00
parent d6c0c97846
commit a0ae0b0936
5 changed files with 85 additions and 2 deletions
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28
src/process/posix_spawn.c
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@ -2,7 +2,9 @@
#include <unistd.h>
#include <signal.h>
#include <stdint.h>
#include <fcntl.h>
#include "syscall.h"
#include "fdop.h"
extern char **environ;
@ -49,6 +51,32 @@ int __posix_spawnx(pid_t *res, const char *path,
__syscall(SYS_setuid, __syscall(SYS_getuid)) ))
_exit(127);
if (fa) {
struct fdop *op;
int ret, fd;
for (op = fa->__actions; op; op = op->next) {
switch(op->cmd) {
case FDOP_CLOSE:
ret = __syscall(SYS_close, op->fd);
break;
case FDOP_DUP2:
ret = __syscall(SYS_dup2, op->fd, op->newfd)<0;
break;
case FDOP_OPEN:
fd = __syscall(SYS_open, op->path,
op->oflag | O_LARGEFILE, op->mode);
if (fd == op->fd) {
ret = 0;
} else {
ret = __syscall(SYS_dup2, fd, op->fd)<0;
__syscall(SYS_close, fd);
}
break;
}
if (ret) _exit(127);
}
}
sigprocmask(SIG_SETMASK, (attr->__flags & POSIX_SPAWN_SETSIGMASK)
? &attr->__mask : &oldmask, 0);