48 lines
828 B
C
48 lines
828 B
C
#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <unistd.h>
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double convert(const char *num) {
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if (atof(num) <= 0) {
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fprintf(stderr, "sleep: %s < 1\n", num);
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exit(1);
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}
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return atof(num);
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}
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int main(const int argc, const char **argv) {
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if (argc == 1 || !strcmp(argv[argc - 1], "--help")) {
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printf("sleep [num[m - minute / h - hour / d - days]] / [inf infinity]\n");
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return 0;
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}
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if (!strcmp(argv[1], "inf"))
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for (;;)
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sleep(1);
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double sec = 0;
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for (int i = 1; i < argc; i++) {
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switch (argv[i][strlen(argv[i]) - 1]) {
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case 'd':
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sec += convert(argv[i]) * 86400;
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break;
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case 'h':
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sec += convert(argv[i]) * 3600;
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break;
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case 'm':
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sec += convert(argv[i]) * 60;
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break;
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default:
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sec += convert(argv[i]);
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}
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}
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usleep(sec * 1000000);
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return 0;
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}
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