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os-posix: reorder parent notification for -daemonize

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Put "success" parent reporting in os_setup_post() to after
all other initializers which may also fail, to the very end,
so more possible failure cases are reported properly to the
calling process.

Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
Reviewed-by: Gonglei <arei.gonglei@huawei.com>
This commit is contained in:
Michael Tokarev 2014-10-30 17:47:46 +03:00
parent fee78fd6d2
commit 25cec2b896
1 changed files with 10 additions and 9 deletions
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19
os-posix.c
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@ -255,15 +255,6 @@ void os_setup_post(void)
int fd = 0;
if (daemonize) {
uint8_t status = 0;
ssize_t len;
do {
len = write(daemon_pipe, &status, 1);
} while (len < 0 && errno == EINTR);
if (len != 1) {
exit(1);
}
if (chdir("/")) {
perror("not able to chdir to /");
exit(1);
@ -278,11 +269,21 @@ void os_setup_post(void)
change_process_uid();
if (daemonize) {
uint8_t status = 0;
ssize_t len;
dup2(fd, 0);
dup2(fd, 1);
dup2(fd, 2);
close(fd);
do {
len = write(daemon_pipe, &status, 1);
} while (len < 0 && errno == EINTR);
if (len != 1) {
exit(1);
}
}
}