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* PID and lock file fixes

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git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@299 fefdeb5f-60dc-0310-8127-8f9354f1896f
This commit is contained in:
Lennart Poettering 2004-11-21 13:18:56 +00:00
parent fa751e537d
commit f2b11dbef8
2 changed files with 105 additions and 40 deletions
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48
polyp/util.c
View file

@ -646,26 +646,50 @@ char* pa_strip_nl(char *s) {
/* Create a temporary lock file and lock it. */
int pa_lock_lockfile(const char *fn) {
int fd;
int fd = -1;
assert(fn);
if ((fd = open(fn, O_CREAT|O_RDWR, S_IRUSR|S_IWUSR)) < 0) {
pa_log(__FILE__": failed to create lock file '%s': %s\n", fn, strerror(errno));
goto fail;
for (;;) {
struct stat st;
if ((fd = open(fn, O_CREAT|O_RDWR, S_IRUSR|S_IWUSR)) < 0) {
pa_log(__FILE__": failed to create lock file '%s': %s\n", fn, strerror(errno));
goto fail;
}
if (pa_lock_fd(fd, 1) < 0) {
pa_log(__FILE__": failed to lock file '%s'.\n", fn);
goto fail;
}
if (fstat(fd, &st) < 0) {
pa_log(__FILE__": failed to fstat() file '%s'.\n", fn);
goto fail;
}
/* Check wheter the file has been removed meanwhile. When yes, restart this loop, otherwise, we're done */
if (st.st_nlink >= 1)
break;
if (pa_lock_fd(fd, 0) < 0) {
pa_log(__FILE__": failed to unlock file '%s'.\n", fn);
goto fail;
}
if (close(fd) < 0) {
pa_log(__FILE__": failed to close file '%s'.\n", fn);
goto fail;
}
fd = -1;
}
if (pa_lock_fd(fd, 1) < 0)
pa_log(__FILE__": failed to lock file '%s'.\n", fn);
goto fail;
return fd;
fail:
if (fd >= 0) {
unlink(fn);
if (fd >= 0)
close(fd);
}
return -1;
}