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different compiler warning fixes

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Solve some unchecked return codes in the new daemonization file

AG adapted a bit

Signed-off-by: Edwin van den Oetelaar <oetelaar.automatisering@gmail.com>
Signed-off-by: Andy Green <andy.green@linaro.org>
This commit is contained in:
Edwin van den Oetelaar 2013-01-18 09:20:54 +08:00 • committed by Andy Green
parent 6d1fcb7a95
commit 759c9ac465
1 changed files with 27 additions and 10 deletions
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37
lib/daemonize.c
View file

@ -24,9 +24,12 @@
static int pid_daemon;
static char lock_path[PATH_MAX];
static void child_handler(int signum)
static void
child_handler(int signum)
{
int fd;
int len;
int sent;
char sz[20];
switch (signum) {
@ -45,10 +48,15 @@ static void child_handler(int signum)
lock_path, errno, strerror(errno));
exit(1);
}
sprintf(sz, "%u", pid_daemon);
write(fd, sz, strlen(sz));
close(fd);
exit(0);
len = sprintf(sz, "%u", pid_daemon);
sent = write(fd, sz, len);
if (sent != len)
fprintf(stderr, "unable write pid to lock"
" file %s, code=%d (%s)",
lock_path, errno, strerror(errno));
close(fd);
exit(!!(sent == len));
case SIGCHLD: /* daemonization failed */
exit(1);
@ -64,7 +72,8 @@ static void child_handler(int signum)
* The process context you called from has been terminated then.
*/
int lws_daemonize(const char *_lock_path)
int
lws_daemonize(const char *_lock_path)
{
pid_t sid, parent;
@ -129,7 +138,7 @@ int lws_daemonize(const char *_lock_path)
* Change the current working directory. This prevents the current
* directory from being locked; hence not being able to remove it.
*/
if ((chdir("/")) < 0) {
if (chdir("/") < 0) {
fprintf(stderr,
"unable to change directory to %s, code %d (%s)",
"/", errno, strerror(errno));
@ -137,9 +146,17 @@ int lws_daemonize(const char *_lock_path)
}
/* Redirect standard files to /dev/null */
freopen("/dev/null", "r", stdin);
freopen("/dev/null", "w", stdout);
freopen("/dev/null", "w", stderr);
if (!freopen("/dev/null", "r", stdin))
fprintf(stderr, "unable to freopen() stdin, code %d (%s)",
errno, strerror(errno));
if (!freopen("/dev/null", "w", stdout))
fprintf(stderr, "unable to freopen() stdout, code %d (%s)",
errno, strerror(errno));
if (!freopen("/dev/null", "w", stderr))
fprintf(stderr, "unable to freopen() stderr, code %d (%s)",
errno, strerror(errno));
/* Tell the parent process that we are A-okay */
kill(parent, SIGUSR1);