ioops: misc: add dup{,2}_or_die to ioops

Bail out if it should ever fail. Detected by coverty in the
translate_pcap_to_txf() path.

Signed-off-by: Daniel Borkmann <dborkman@redhat.com>

1 files changed, 16 insertions, 0 deletions

diff --git a/ioops.c b/ioops.c
index 7cec2fd..4ac0f3a 100644
--- a/ioops.c
+++ b/ioops.c
@@ -12,6 +12,7 @@
 #include "dev.h"
 #include "ioops.h"
 #include "str.h"
+#include "built_in.h"
 
 int open_or_die(const char *file, int flags)
 {
@@ -30,6 +31,21 @@ int open_or_die_m(const char *file, int flags, mode_t mode)
 	return ret;
 }
 
+int dup_or_die(int oldfd)
+{
+	int newfd = dup(oldfd);
+	if (unlikely(newfd < 0))
+		panic("Cannot dup old file descriptor!\n");
+	return newfd;
+}
+
+void dup2_or_die(int oldfd, int newfd)
+{
+	int ret = dup2(oldfd, newfd);
+	if (unlikely(ret < 0))
+		panic("Cannot dup2 old/new file descriptor!\n");
+}
+
 void create_or_die(const char *file, mode_t mode)
 {
 	int fd = open_or_die_m(file, O_WRONLY | O_CREAT, mode);