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add proper locking when autospawning a daemon


git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@245 fefdeb5f-60dc-0310-8127-8f9354f1896f
This commit is contained in:
Lennart Poettering 2004-09-28 22:47:48 +00:00
parent 450ad85b35
commit 6f59ae1763
14 changed files with 554 additions and 59 deletions
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43
polyp/util.c
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@ -502,7 +502,7 @@ finish:
return r;
}
int pa_lock_file(int fd, int b) {
int pa_lock_fd(int fd, int b) {
struct flock flock;
@ -525,3 +525,44 @@ char* pa_strip_nl(char *s) {
s[strcspn(s, "\r\n")] = 0;
return s;
}
int pa_lock_lockfile(const char *fn) {
int fd;
assert(fn);
if ((fd = open(fn, O_CREAT|O_RDWR, S_IRUSR|S_IWUSR)) < 0) {
pa_log(__FILE__": failed to create lock file '%s'\n", fn);
goto fail;
}
if (pa_lock_fd(fd, 1) < 0)
goto fail;
return fd;
fail:
if (fd >= 0)
close(fd);
return -1;
}
int pa_unlock_lockfile(int fd) {
int r = 0;
assert(fd >= 0);
if (pa_lock_fd(fd, 0) < 0) {
pa_log(__FILE__": WARNING: failed to unlock file.\n");
r = -1;
}
if (close(fd) < 0) {
pa_log(__FILE__": WARNING: failed to close lock file.\n");
r = -1;
}
return r;
}