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fix backwards posix_spawn file action order

This commit is contained in:
Rich Felker 2011-05-29 12:58:02 -04:00
parent dd45edb5ff
commit f48832ee15
5 changed files with 10 additions and 6 deletions
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2
src/process/fdop.h
View File

@ -3,7 +3,7 @@
#define FDOP_OPEN 3
struct fdop {
struct fdop *next;
struct fdop *next, *prev;
int cmd, fd, newfd, oflag;
mode_t mode;
char path[];

5
src/process/posix_spawn.c
View File

@ -51,10 +51,11 @@ int __posix_spawnx(pid_t *res, const char *path,
__syscall(SYS_setuid, __syscall(SYS_getuid)) ))
_exit(127);
if (fa) {
if (fa && fa->__actions) {
struct fdop *op;
int ret, fd;
for (op = fa->__actions; op; op = op->next) {
for (op = fa->__actions; op->next; op = op->next);
for (; op; op = op->prev) {
switch(op->cmd) {
case FDOP_CLOSE:
ret = __syscall(SYS_close, op->fd);

3
src/process/posix_spawn_file_actions_addclose.c
View File

@ -9,7 +9,8 @@ int posix_spawn_file_actions_addclose(posix_spawn_file_actions_t *fa, int fd)
if (!op) return ENOMEM;
op->cmd = FDOP_CLOSE;
op->fd = fd;
op->next = fa->__actions;
if ((op->next = fa->__actions)) op->next->prev = op;
op->prev = 0;
fa->__actions = op;
return 0;
}

3
src/process/posix_spawn_file_actions_adddup2.c
View File

@ -10,7 +10,8 @@ int posix_spawn_file_actions_adddup2(posix_spawn_file_actions_t *fa, int fd, int
op->cmd = FDOP_DUP2;
op->fd = fd;
op->newfd = newfd;
op->next = fa->__actions;
if ((op->next = fa->__actions)) op->next->prev = op;
op->prev = 0;
fa->__actions = op;
return 0;
}

3
src/process/posix_spawn_file_actions_addopen.c
View File

@ -13,7 +13,8 @@ int posix_spawn_file_actions_addopen(posix_spawn_file_actions_t *fa, int fd, con
op->oflag = flags;
op->mode = mode;
strcpy(op->path, path);
op->next = fa->__actions;
if ((op->next = fa->__actions)) op->next->prev = op;
op->prev = 0;
fa->__actions = op;
return 0;
}