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authorGlenn L McGrath2003-05-11 14:52:39 +0000
committerGlenn L McGrath2003-05-11 14:52:39 +0000
commit1e11c34be4decfef8fbda8a8e01cd60def8232e5 (patch)
tree6e93956fef2bcd4c1db18031dc081dcaf689f2d1 /init/pidfilehack.c
parent8c6887c855460ee9e688e2a51e29f99faa2a2d8c (diff)
downloadbusybox-1e11c34be4decfef8fbda8a8e01cd60def8232e5.zip
busybox-1e11c34be4decfef8fbda8a8e01cd60def8232e5.tar.gz
minit, a Minimal init system.
Diffstat (limited to 'init/pidfilehack.c')
-rw-r--r--init/pidfilehack.c78
1 files changed, 78 insertions, 0 deletions
diff --git a/init/pidfilehack.c b/init/pidfilehack.c
new file mode 100644
index 0000000..a2d905b
--- /dev/null
+++ b/init/pidfilehack.c
@@ -0,0 +1,78 @@
+/*
+ * minit version 0.9.1 by Felix von Leitner
+ * ported to busybox by Glenn McGrath <bug1@optushome.com.au>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#include <unistd.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <sys/fcntl.h>
+
+#include "busybox.h"
+/* purpose: argv[1] is the full path to a PID file,
+ * argv+2 is the daemon to run.
+ * the daemon is expected to fork in the background and write its PID in
+ * the pid file.
+ */
+
+extern int pidfilehack_main(int argc, char **argv)
+{
+ int count = 0;
+
+ if (argc < 3) {
+ bb_show_usage();
+
+ }
+ if (unlink(argv[2]) && (errno != ENOENT)) {
+ bb_perror_msg("could not remove pid file");
+ }
+ switch (fork()) {
+ case -1:
+ bb_perror_msg("could not fork");
+ return 2;
+ case 0: /* child */
+ execv(argv[3], argv + 3);
+ bb_perror_msg("execvp failed");
+ return 3;
+ }
+ do {
+ int fd = open(argv[2], O_RDONLY);
+
+ if (fd >= 0) {
+ static char buf[100] = "-P";
+ int len = read(fd, buf + 2, 100);
+
+ close(fd);
+ if (len > 0) {
+ char *_argv[] = { "msvc", 0, 0, 0 };
+ if (buf[len + 1] == '\n') {
+ buf[len + 1] = 0;
+ } else {
+ buf[len + 2] = 0;
+ }
+ _argv[1] = buf;
+ _argv[2] = argv[1];
+ execvp(_argv[0], _argv);
+ bb_perror_msg("execvp failed");
+ return 0;
+ }
+ }
+ sleep(1);
+ } while (++count < 30);
+
+ return(0);
+}