Add a sys_check routine

2 files changed, 14 insertions, 0 deletions

diff --git a/src/system.c b/src/system.c
index df53e99..2f95661 100644
--- a/src/system.c
+++ b/src/system.c
@@ -10,6 +10,16 @@
 #include <unistd.h>
 
 #include "system.h"
+#include "utils.h"
+
+void __sys_check(int cond, const char *prefix, const char *file, int line)
+{
+	if (!cond) {
+		fprintf(stderr, "%s:%d: %s: ", file, line, prefix);
+		perror("");
+		exit(EXIT_FAILURE);
+	}
+}
 
 int file_exists(const char *path)
 {
diff --git a/src/system.h b/src/system.h
index 950a82a..1045153 100644
--- a/src/system.h
+++ b/src/system.h
@@ -4,6 +4,10 @@
 /* Routines for interacting with the system, mainly executing processes and
  * dealing with the file system. */
 
+void __sys_check(int cond, const char *prefix, const char *file, int line);
+
+#define sys_check(COND, PREFIX)	__sys_check(COND, PREFIX, __FILE__, __LINE__)
+
 /* Used when encrypting or decrypting a file, see the copy_file_with_encryption
  * function. */
 enum encrypt {