54 lines
1.1 KiB
C++
54 lines
1.1 KiB
C++
#include <getopt.h>
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#include <libgen.h>
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#include <stdio.h>
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int main(int argc, char* argv[])
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{
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bool zero = false;
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for (;;)
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{
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static option long_options[] {
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{ "zero", no_argument, nullptr, 'z' },
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{ "help", no_argument, nullptr, 'h' },
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};
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int ch = getopt_long(argc, argv, "zh", long_options, nullptr);
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if (ch == -1)
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break;
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switch (ch)
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{
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case 'z':
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zero = true;
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break;
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case 'h':
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fprintf(stderr, "usage: %s [OPTION] NAME...\n", argv[0]);
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fprintf(stderr, " output the directory containing each NAME\n");
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fprintf(stderr, "OPTIONS:\n");
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fprintf(stderr, " -z, --zero end each output with NUL instead of a newline\n");
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fprintf(stderr, " -h, --help show this message and exit\n");
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return 0;
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case '?':
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fprintf(stderr, "invalid option %c\n", optopt);
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fprintf(stderr, "see '%s --help' for usage\n", argv[0]);
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return 1;
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}
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}
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if (optind >= argc)
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{
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fprintf(stderr, "missing operand\n");
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fprintf(stderr, "see '%s --help' for usage\n", argv[0]);
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return 1;
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}
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for (int i = optind; i < argc; i++)
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{
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printf("%s", dirname(argv[i]));
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putchar(zero ? '\0' : '\n');
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}
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return 0;
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}
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