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Add hacky utiliy that waits for the presence of some files

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Signed-off-by: David Oberhollenzer <goliath@infraroot.at>
This commit is contained in:
David Oberhollenzer 2019-03-24 18:02:17 +01:00
parent ec04681c4d
commit 9fece2eb88
3 changed files with 89 additions and 1 deletions
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1
.gitignore vendored
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@ -21,5 +21,6 @@ shutdown
killall5
runsvc
gcrond
waitfile
etc/initd.env

7
cmd/Makemodule.am
View file

@ -14,6 +14,11 @@ killall5_CPPFLAGS = $(AM_CPPFLAGS)
killall5_CFLAGS = $(AM_CFLAGS)
killall5_LDFLAGS = $(AM_LDFLAGS)
waitfile_SOURCES = cmd/waitfile.c
waitfile_CPPFLAGS = $(AM_CPPFLAGS)
waitfile_CFLAGS = $(AM_CFLAGS)
waitfile_LDFLAGS = $(AM_LDFLAGS)
SRVHEADERS = cmd/service/servicecmd.h
service_SOURCES = cmd/service/servicecmd.c cmd/service/help.c
@ -31,4 +36,4 @@ dist_man8_MANS += cmd/shutdown.8 cmd/service/service.8
EXTRA_DIST += $(SRVHEADERS)
sbin_PROGRAMS += service shutdown
helper_PROGRAMS += killall5 runsvc
helper_PROGRAMS += killall5 runsvc waitfile

82
cmd/waitfile.c Normal file
View file

@ -0,0 +1,82 @@
/* 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;
}