p5-2.c

来自「UNIX程序设计教程」· C语言 代码 · 共 36 行

#include <unistd.h>
#include <stdio.h>
int main (int argc, char **argv)
{   
    int index;
    int opt;
    int iflag = 0, lflag = 0;
    char *fvalue = NULL, *svalue = NULL;
    while ((opt = getopt (argc, argv, ":if:ls:")) != -1)
        switch (opt) {
        case 'i':
            iflag = 1;
            break;
        case 'l':
            lflag = 1;
            break;
        case 's':
            svalue = optarg;
            break;
        case 'f':
            fvalue = optarg;
            break;
        case '?':
            printf ("Unknown option `-%c'.\n", optopt);
            break;
        case ':':
            printf (" `-%c' missing option argument.\n", optopt);
            break;
        }
    printf("iflag = %d, lflag = %d, fvalue = %s, svalue = %s\n",
           iflag, lflag, fvalue, svalue);
    for (index = optind; index < argc; index++)
        printf ("Non-option argument: %s\n", argv[index]);
    return 0;
}