diff options
Diffstat (limited to '')
| -rw-r--r-- | src/daemonise.c | 37 |
1 files changed, 21 insertions, 16 deletions
diff --git a/src/daemonise.c b/src/daemonise.c index c9de08a..f8da122 100644 --- a/src/daemonise.c +++ b/src/daemonise.c @@ -60,7 +60,7 @@ static char* __pidfile = NULL; */ static int dup_at_least_3(int old) { - int intermediary[] = { -1, -1, -1 }; + int intermediary[3]; int i = 0, saved_errno; do @@ -73,12 +73,12 @@ static int dup_at_least_3(int old) intermediary[i++] = old; } while (old < 3); + i--; fail: saved_errno = errno; - if (intermediary[0] >= 0) close(intermediary[0]); - if (intermediary[1] >= 0) close(intermediary[1]); - if (intermediary[2] >= 0) close(intermediary[2]); + while (i--) + close(intermediary[i]); errno = saved_errno; return old; } @@ -167,6 +167,7 @@ static int dup_at_least_3(int old) * - `DAEMONISE_KEEP_STDIN` * - `DAEMONISE_KEEP_STDOUT` * - `DAEMONISE_KEEP_FDS` + * - `DAEMONISE_NEW_PID` * @param ... Enabled if `DAEMONISE_KEEP_FDS` is used, * do not add anything if `DAEMONISE_KEEP_FDS` * is unused. This is a `-1`-terminated list @@ -182,9 +183,10 @@ static int dup_at_least_3(int old) * has exited without removing the PID file. * @throws EINVAL `flags` contains an unsupported bit, both * `DAEMONISE_KEEP_STDERR` and `DAEMONISE_CLOSE_STDERR` - * are set, or both `DAEMONISE_CLOSE_STDERR` and - * `DAEMONISE_KEEP_FDS` are set whilst `2` is - * in the list of file descriptor not to close, + * are set, both `DAEMONISE_NO_PID_FILE` and + * `DAEMONISE_NEW_PID`, or both `DAEMONISE_CLOSE_STDERR` + * and `DAEMONISE_KEEP_FDS` are set whilst `2` is + * in the list of file descriptor not to close. * @throws Any error specified for signal(3). * @throws Any error specified for sigemptyset(3). * @throws Any error specified for sigprocmask(3). @@ -218,20 +220,22 @@ int daemonise(const char* name, int flags, ...) /* Validate flags. */ - if (flags & ~2047) + if (flags & (int)~(2048L * 2 - 1)) return errno = EINVAL, -1; - if (flags & DAEMONISE_KEEP_STDERR) - if (flags & DAEMONISE_CLOSE_STDERR) + if ((flags & DAEMONISE_KEEP_STDERR) && (flags & DAEMONISE_CLOSE_STDERR)) + return errno = EINVAL, -1; + if ((flags & DAEMONISE_NO_PID_FILE) && (flags & DAEMONISE_NEW_PID)) return errno = EINVAL, -1; /* Find out which file descriptors not too close. */ - if ((flags & DAEMONISE_KEEP_FDS) == 0) + if (flags & DAEMONISE_KEEP_FDS) { va_start(args, flags); - while (va_arg(args, int) >= 0) + while ((fd = va_arg(args, int)) >= 0) if ((fd > 2) && (keepmax < fd)) keepmax = fd; + fd = -1; va_end(args); keep = calloc((size_t)keepmax + 1, sizeof(char)); t (keep == NULL); @@ -249,8 +253,8 @@ int daemonise(const char* name, int flags, ...) keep[fd] = 1; break; } - va_end(args); fd = -1; + va_end(args); } /* We assume that the maximum file descriptor is not extremely large. * We also assume the number of file descriptors too keep is very small, @@ -264,7 +268,7 @@ int daemonise(const char* name, int flags, ...) for (i = 3; (rlim_t)i < rlimit.rlim_cur; i++) /* File descriptors with numbers above and including * `rlimit.rlim_cur` cannot be created. They cause EBADF. */ - if ((keep == NULL) || (keep[i] == 0)) + if ((i > keepmax) || (keep[i] == 0)) close(i); } free(keep), keep = NULL; @@ -272,7 +276,8 @@ int daemonise(const char* name, int flags, ...) /* Reset all signal handlers. */ if ((flags & DAEMONISE_NO_SIG_DFL) == 0) for (i = 1; i < _NSIG; i++) - t (signal(i, SIG_DFL) == SIG_ERR); + if (signal(i, SIG_DFL) == SIG_ERR) + t (errno != EINVAL); /* Set signal mask. */ if ((flags & DAEMONISE_KEEP_SIGMASK) == 0) @@ -337,7 +342,7 @@ int daemonise(const char* name, int flags, ...) t (__pidfile == NULL); stpcpy(stpcpy(stpcpy(__pidfile, "/run/"), name), ".pid"); } - fd = open(__pidfile, O_WRONLY | O_CREAT | O_EXCL, 0644); + fd = open(__pidfile, O_WRONLY | O_CREAT | ((flags & DAEMONISE_NEW_PID) ? 0 : O_EXCL), 0644); if (fd == -1) { saved_errno = errno; |