ioops: Add mkostemp_or_die() wrapper for mkostemp(3)

Add a panic()ing wrapper for mkostemp(3). This will be used to safely
create unique temporary files.

Signed-off-by: Tobias Klauser <tklauser@distanz.ch>

1 files changed, 10 insertions, 0 deletions

diff --git a/ioops.c b/ioops.c
index c1eeddc..160c74e 100644
--- a/ioops.c
+++ b/ioops.c
@@ -1,6 +1,7 @@
 #ifndef _GNU_SOURCE
 # define _GNU_SOURCE
 #endif
+#include <stdlib.h>
 #include <unistd.h>
 #include <sys/types.h>
 #include <sys/stat.h>
@@ -53,6 +54,15 @@ void create_or_die(const char *file, mode_t mode)
 	close(fd);
 }
 
+int mkostemp_or_die(char *templ, int flags)
+{
+	/* mode is 0600 (S_IRUSR | S_IWUSR) by default */
+	int fd = mkostemp(templ, flags);
+	if (unlikely(fd < 0))
+		panic("Cannot create unique temporary file! %s\n", strerror(errno));
+	return fd;
+}
+
 void pipe_or_die(int pipefd[2], int flags)
 {
 	int ret = pipe2(pipefd, flags);