chg: extract the logic of setting FD_CLOEXEC to a utility function
Setting FD_CLOEXEC is useful for other fds such like lockfd and sockdirfd,
move the logic from hgc_open to util.
--- a/contrib/chg/hgclient.c Sun Apr 10 03:14:32 2016 +0100
+++ b/contrib/chg/hgclient.c Mon Apr 11 00:17:17 2016 +0100
@@ -418,11 +418,7 @@
/* don't keep fd on fork(), so that it can be closed when the parent
* process get terminated. */
- int flags = fcntl(fd, F_GETFD);
- if (flags < 0)
- abortmsgerrno("cannot get flags of socket");
- if (fcntl(fd, F_SETFD, flags | FD_CLOEXEC) < 0)
- abortmsgerrno("cannot set flags of socket");
+ fsetcloexec(fd);
struct sockaddr_un addr;
addr.sun_family = AF_UNIX;
--- a/contrib/chg/util.c Sun Apr 10 03:14:32 2016 +0100
+++ b/contrib/chg/util.c Mon Apr 11 00:17:17 2016 +0100
@@ -8,6 +8,7 @@
*/
#include <errno.h>
+#include <fcntl.h>
#include <signal.h>
#include <stdarg.h>
#include <stdio.h>
@@ -91,6 +92,15 @@
abortmsgerrno("failed to fchdir");
}
+void fsetcloexec(int fd)
+{
+ int flags = fcntl(fd, F_GETFD);
+ if (flags < 0)
+ abortmsgerrno("cannot get flags of fd %d", fd);
+ if (fcntl(fd, F_SETFD, flags | FD_CLOEXEC) < 0)
+ abortmsgerrno("cannot set flags of fd %d", fd);
+}
+
void *mallocx(size_t size)
{
void *result = malloc(size);
--- a/contrib/chg/util.h Sun Apr 10 03:14:32 2016 +0100
+++ b/contrib/chg/util.h Mon Apr 11 00:17:17 2016 +0100
@@ -24,6 +24,7 @@
void debugmsg(const char *fmt, ...) PRINTF_FORMAT_;
void fchdirx(int dirfd);
+void fsetcloexec(int fd);
void *mallocx(size_t size);
void *reallocx(void *ptr, size_t size);