79 lines
2.0 KiB
C
79 lines
2.0 KiB
C
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/*
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* minit version 0.9.1 by Felix von Leitner
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* ported to busybox by Glenn McGrath <bug1@optushome.com.au>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include <unistd.h>
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#include <errno.h>
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#include <stdlib.h>
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#include <sys/fcntl.h>
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#include "busybox.h"
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/* purpose: argv[1] is the full path to a PID file,
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* argv+2 is the daemon to run.
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* the daemon is expected to fork in the background and write its PID in
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* the pid file.
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*/
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extern int pidfilehack_main(int argc, char **argv)
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{
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int count = 0;
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if (argc < 3) {
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bb_show_usage();
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}
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if (unlink(argv[2]) && (errno != ENOENT)) {
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bb_perror_msg("could not remove pid file");
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}
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switch (fork()) {
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case -1:
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bb_perror_msg("could not fork");
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return 2;
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case 0: /* child */
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execv(argv[3], argv + 3);
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bb_perror_msg("execvp failed");
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return 3;
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}
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do {
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int fd = open(argv[2], O_RDONLY);
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if (fd >= 0) {
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static char buf[100] = "-P";
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int len = read(fd, buf + 2, 100);
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close(fd);
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if (len > 0) {
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char *_argv[] = { "msvc", 0, 0, 0 };
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if (buf[len + 1] == '\n') {
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buf[len + 1] = 0;
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} else {
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buf[len + 2] = 0;
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}
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_argv[1] = buf;
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_argv[2] = argv[1];
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execvp(_argv[0], _argv);
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bb_perror_msg("execvp failed");
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return 0;
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}
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}
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sleep(1);
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} while (++count < 30);
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return(0);
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}
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