sbase

commit 61b58e3c2731966a8fa4d60e33a724a27e722f76
parent fdcca1be51cad2c0b53d41d829830c1a7070def0
Author: Carlos J. Torres <vlaadbrain@gmail.com>
Date:   Mon,  3 Nov 2025 10:10:31 -0500

basename: Ignore suffix when its an empty string

basename(3) manual states if path is a null pointer or emtpy
string, a pointer to "." is returned. We shouldn't attempt
to modify it because its const.

Diffstat:
M
basename.c
 | 
5
+++--

1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/basename.c b/basename.c
@@ -15,6 +15,7 @@ int
 main(int argc, char *argv[])
 {
 	ssize_t off;
+	size_t slen;
 	char *p;
 
 	ARGBEGIN {
@@ -26,8 +27,8 @@ main(int argc, char *argv[])
 		usage();
 
 	p = basename(argv[0]);
-	if (argc == 2) {
-		off = strlen(p) - strlen(argv[1]);
+	if (argc == 2 && (slen = strlen(argv[1])) > 0) {
+		off = strlen(p) - slen;
 		if (off > 0 && !strcmp(p + off, argv[1]))
 			p[off] = '\0';
 	}