mirror of https://github.com/pygos/init.git
83 lines
1.3 KiB
C
83 lines
1.3 KiB
C
/* SPDX-License-Identifier: ISC */
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <stdlib.h>
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#include <limits.h>
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#include <unistd.h>
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#include <signal.h>
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#include <stdio.h>
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#include <ctype.h>
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#include <poll.h>
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static int strtoui(const char *str)
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{
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int i = 0;
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if (!isdigit(*str))
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return -1;
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while (isdigit(*str)) {
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if (i > (INT_MAX / 10))
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return -1;
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i = i * 10 + (*(str++)) - '0';
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}
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if (*str != '\0')
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return -1;
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return i;
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}
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static void sigproc(int signo)
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{
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if (signo == SIGALRM) {
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fputs("waitfile timeout\n", stderr);
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exit(EXIT_FAILURE);
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}
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}
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int main(int argc, char **argv)
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{
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int i, found, timeout, probetime;
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struct stat sb;
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if (argc < 4)
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goto fail_usage;
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timeout = strtoui(argv[1]);
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probetime = strtoui(argv[2]);
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if (timeout < 0 || probetime < 0)
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goto fail_timeout;
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signal(SIGALRM, sigproc);
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alarm(timeout);
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for (;;) {
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found = 1;
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for (i = 3; i < argc; ++i) {
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if (stat(argv[i], &sb) != 0) {
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found = 0;
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break;
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}
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}
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if (found) {
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alarm(0);
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break;
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}
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poll(NULL, 0, probetime);
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}
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return EXIT_SUCCESS;
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fail_timeout:
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fputs("Timeout values must be integers!\n", stderr);
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goto fail_usage;
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fail_usage:
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fputs("Usage: waitfile <timeout secs> <probe time ms> FILES...\n",
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stderr);
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return EXIT_FAILURE;
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}
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