@@ -85,6 +85,7 @@
#include <stdint.h>
#include <stdbool.h>
#include <unistd.h>
+#include <sys/stat.h>
#define ARRAY_SIZE(_n) (sizeof(_n) / sizeof((_n)[0]))
@@ -770,7 +771,14 @@ static int hash_file(struct hash_type *t, const char *filename, bool add_filenam
if (!filename || !strcmp(filename, "-")) {
str = t->func(stdin);
} else {
- FILE *f = fopen(filename, "r");
+ struct stat path_stat;
+ stat(filename, &path_stat);
+ if (S_ISDIR(path_stat.st_mode)) {
+ fprintf(stderr, "Failed to open '%s': Is a directory\n", filename);
+ return 1;
+ }
+
+ FILE *f = fopen(filename, "r+");
if (!f) {
fprintf(stderr, "Failed to open '%s'\n", filename);
mkhash currently returns the hash of an empty input when trying to hash a folder. This can be missleading in caseswhere e.g. an env variable is undefined which should contain a filename. `mkhash ./path/to/$FILE` would exit with code 0 and return a legit looking checksum. A better behaviour would be to fail with exit code 1, which imitates the behaviour of `md5sum` and `sha256sum`. To avoid hashing of folders the `stat()` is checked. Hashing empty inputs result in the following checksums: md5: d41d8cd98f00b204e9800998ecf8427e sha256: e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855 Signed-off-by: Paul Spooren <mail@aparcar.org> --- scripts/mkhash.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-)