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Use vfork(2) instead of fork(2) to create child process for "gzip" and

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wait until it terminates. Problem noted by Enami Tsugutomo on
"current-users@netbsd.org"
This commit is contained in:
tron 2000-08-22 14:20:17 +00:00
parent 863e9c9128
commit 815deae8b6
1 changed files with 13 additions and 6 deletions
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19
usr.bin/newsyslog/newsyslog.c
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@ -1,4 +1,4 @@
/* $NetBSD: newsyslog.c,v 1.35 2000/07/24 15:15:25 ad Exp $ */
/* $NetBSD: newsyslog.c,v 1.36 2000/08/22 14:20:17 tron Exp $ */
/*
* Copyright (c) 1999, 2000 Andrew Doran <ad@NetBSD.org>
@ -55,13 +55,14 @@
#include <sys/cdefs.h>
#ifndef lint
__RCSID("$NetBSD: newsyslog.c,v 1.35 2000/07/24 15:15:25 ad Exp $");
__RCSID("$NetBSD: newsyslog.c,v 1.36 2000/08/22 14:20:17 tron Exp $");
#endif /* not lint */
#include <sys/types.h>
#include <sys/time.h>
#include <sys/stat.h>
#include <sys/param.h>
#include <sys/wait.h>
#include <ctype.h>
#include <fcntl.h>
@ -647,16 +648,22 @@ void
log_compress(struct conf_entry *log, const char *fn)
{
char tmp[MAXPATHLEN];
pid_t pid;
PRINFO(("gzip %s\n", fn));
if (!noaction) {
if ((pid = fork()) < 0)
err(EXIT_FAILURE, "fork");
pid_t pid;
int status;
if ((pid = vfork()) < 0)
err(EXIT_FAILURE, "vfork");
else if (pid == 0) {
execl(_PATH_GZIP, "gzip", "-f", fn, NULL);
err(EXIT_FAILURE, _PATH_GZIP);
_exit(EXIT_FAILURE);
}
while (waitpid(pid, &status, 0) != pid);
if (!WIFEXITED(status) || (WEXITSTATUS(status) != 0))
errx(EXIT_FAILURE, "gzip failed");
}
snprintf(tmp, sizeof (tmp), "%s.gz", fn);