【转】linux监控程序程序自动重启方法

原文：http://blog.chinaunix.net/uid-26588712-id-3196464.html

    #include <stdio.h>
    #include <unistd.h>
    #include <errno.h>
    #include <string.h>
    #include <sys/types.h>
    #include <sys/wait.h>
    #include <stdlib.h>
     
    int
    main(int argc, char **argv)
    {
        int ret, i, status;
        char *child_argv[100] = {0};
        pid_t pid;
        if (argc < 2) {
     
            fprintf(stderr, "Usage:%s <exe_path> <args...>\n", argv[0]);
            return -1;
        }
        for (i = 1; i < argc; ++i) {
            child_argv[i-1] = (char *)malloc(strlen(argv[i])+1);
            strncpy(child_argv[i-1], argv[i], strlen(argv[i]));
            child_argv[i-1][strlen(argv[i])] = '\0';
        }
        while(1){
     
            pid = fork();
            if (pid == -1) {
                fprintf(stderr, "fork() error.errno:%d error:%sn\n", errno, strerror(errno));
                break;
            }
            if (pid == 0) {
                ret = execv(child_argv[0], (char **)child_argv);
                //ret = execl(child_argv[0], "portmap", NULL, 0);
                if (ret < 0) {
                    fprintf(stderr, "execv ret:%d errno:%d error:%sn \n", ret, errno, strerror(errno));
                    continue;
                }
                exit(0);
            }
     
            if (pid > 0) {
                pid = wait(&status);
     
                fprintf(stdout, "wait return");
            }
     
        }
     
     
        return 0;
    }