anndl: Fixed a couple of bugs.

[utils.git] / serialize.c

#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/file.h>

int main(int argc, unsigned char **argv)
{
    int c;
    int fd, locktype;
    pid_t pid;
    int status;
    
    locktype = LOCK_EX;
    while((c = getopt(argc, argv, "se")) > 0)
    {
	switch(c)
	{
	case 's':
	    locktype = LOCK_SH;
	    break;
	case 'e':
	    locktype = LOCK_EX;
	    break;
	default:
	    return(1);
	}
    }
    if(argc - optind < 2)
    {
	fprintf(stderr, "Wrong number of arguments\n");
	return(1);
    }
    if((fd = open(argv[optind], O_RDWR | O_CREAT, 0600)) < 0)
    {
	perror(argv[optind]);
	return(1);
    }
    optind++;
    flock(fd, locktype);
    if((pid = fork()) < 0)
    {
	perror("fork");
	return(1);
    } else if(!pid) {
	execvp(argv[optind], argv + optind);
	perror(argv[optind]);
	exit(127);
    }
    while(wait(&status) != pid);
    flock(fd, LOCK_UN);
    return(status);
}