| /* vi: set sw=4 ts=4: */ |
| /* |
| * pid file routines |
| * |
| * Copyright (C) 2007 by Stephane Billiart <stephane.billiart@gmail.com> |
| * |
| * Licensed under GPLv2 or later, see file LICENSE in this source tree. |
| */ |
| |
| /* Override ENABLE_FEATURE_PIDFILE */ |
| #define WANT_PIDFILE 1 |
| #include "libbb.h" |
| |
| smallint wrote_pidfile; |
| |
| void FAST_FUNC write_pidfile(const char *path) |
| { |
| int pid_fd; |
| char *end; |
| char buf[sizeof(int)*3 + 2]; |
| struct stat sb; |
| |
| if (!path) |
| return; |
| /* we will overwrite stale pidfile */ |
| pid_fd = open(path, O_WRONLY|O_CREAT|O_TRUNC, 0666); |
| if (pid_fd < 0) |
| return; |
| |
| /* path can be "/dev/null"! Test for such cases */ |
| wrote_pidfile = (fstat(pid_fd, &sb) == 0) && S_ISREG(sb.st_mode); |
| |
| if (wrote_pidfile) { |
| /* few bytes larger, but doesn't use stdio */ |
| end = utoa_to_buf(getpid(), buf, sizeof(buf)); |
| *end = '\n'; |
| full_write(pid_fd, buf, end - buf + 1); |
| } |
| close(pid_fd); |
| } |