This function is going to be used on FDs inherited from parent.
Parent can't set O_CLOEXEC obviously, so we have to set it
ourselves.
Signed-off-by: Michal Privoznik <mprivozn(a)redhat.com>
---
util.c | 17 +++++++++++++++++
util.h | 1 +
2 files changed, 18 insertions(+)
diff --git a/util.c b/util.c
index 1d00404..9817c74 100644
--- a/util.c
+++ b/util.c
@@ -526,6 +526,23 @@ int write_file(const char *path, const char *buf)
return len == 0 ? 0 : -1;
}
+/**
+ * set_cloexec() - Set Close-on-exec flag on given FD
+ * @fd: FD to set the flag on
+ *
+ * Return: 0 on success, -1 on any error
+ */
+int set_cloexec(int fd)
+{
+ int fflags;
+ if ((fflags = fcntl(fd, F_GETFD)) < 0)
+ return -1;
+ fflags |= FD_CLOEXEC;
+ if ((fcntl(fd, F_SETFD, fflags)) < 0)
+ return -1;
+ return 0;
+}
+
#ifdef __ia64__
/* Needed by do_clone() below: glibc doesn't export the prototype of __clone2(),
* use the description from clone(2).
diff --git a/util.h b/util.h
index 26892aa..3db901d 100644
--- a/util.h
+++ b/util.h
@@ -222,5 +222,6 @@ void write_pidfile(int fd, pid_t pid);
int __daemon(int pidfile_fd, int devnull_fd);
int fls(unsigned long x);
int write_file(const char *path, const char *buf);
+int set_cloexec(int fd);
#endif /* UTIL_H */
--
2.39.3