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#include <unistd.h>
#include <errno.h>
#include <stdlib.h>
#include <fcntl.h>
#include <stdio.h>
#define NOVARS
#include "minit.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 char** environ;
int main(int argc, char* argv[]) {
int count=0;
if (argc<3) {
write(1,"usage: pidfilehack service /var/run/daemon.pid /usr/sbin/daemon args...\n",72);
return 0;
}
if (unlink(argv[2])) {
if (errno!=ENOENT) {
perror("could not remove pid file");
return 1;
}
}
switch (fork()) {
case -1:
perror("could not fork");
return 2;
case 0: /* child */
execve(argv[3],argv+3,environ);
perror("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+2,98);
close(fd);
if (len>0) {
char* _argv[] = { MSVC_NAME, 0, 0, 0 };
if (buf[len+1]=='\n')
buf[len+1]=0;
else
buf[len+2]=0;
_argv[1]=buf;
_argv[2]=argv[1];
/* printf("execvp %s %s %s\n",_argv[0],_argv[1],_argv[2]); */
execvp(_argv[0],_argv);
perror("execvp failed");
return 0;
} /* else
printf("file there but open returned %d\n",fd); */
} /* else
printf("%s not there yet\n",argv[2]); */
sleep(1);
if (++count>=30)
exit(0);
} while (1);
}
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