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-rw-r--r--src/shared/util.c37
-rw-r--r--src/shared/util.h3
2 files changed, 40 insertions, 0 deletions
diff --git a/src/shared/util.c b/src/shared/util.c
index d2ca3fc783..64d6e62a53 100644
--- a/src/shared/util.c
+++ b/src/shared/util.c
@@ -56,6 +56,7 @@
#include <sys/mman.h>
#include <sys/vfs.h>
#include <linux/magic.h>
+#include <limits.h>
#include "macro.h"
#include "util.h"
@@ -5851,3 +5852,39 @@ void closedirp(DIR **d) {
void umaskp(mode_t *u) {
umask(*u);
}
+
+bool filename_is_safe(const char *p) {
+
+ if (isempty(p))
+ return false;
+
+ if (strchr(p, '/'))
+ return false;
+
+ if (streq(p, "."))
+ return false;
+
+ if (streq(p, ".."))
+ return false;
+
+ if (strlen(p) > FILENAME_MAX)
+ return false;
+
+ return true;
+}
+
+bool string_is_safe(const char *p) {
+ const char *t;
+
+ assert(p);
+
+ for (t = p; *t; t++) {
+ if (*p < ' ')
+ return false;
+
+ if (strchr("\\\"\'", *p))
+ return false;
+ }
+
+ return true;
+}
diff --git a/src/shared/util.h b/src/shared/util.h
index 61b88a8b2e..cbded08617 100644
--- a/src/shared/util.h
+++ b/src/shared/util.h
@@ -558,3 +558,6 @@ _malloc_ static inline void *memdup_multiply(const void *p, size_t a, size_t b)
return memdup(p, a * b);
}
+
+bool filename_is_safe(const char *p);
+bool string_is_safe(const char *p);