add file actions support to posix_spawn

[musl] / src / process / posix_spawn.c

diff --git a/src/process/posix_spawn.c b/src/process/posix_spawn.c
index 7018c37..59f4a8b 100644 (file)
--- a/src/process/posix_spawn.c
+++ b/src/process/posix_spawn.c
@@ -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);