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