utils-std

commit: 530f0fc4f8110f461e796e83934ee132893089e5
parent 875b0a4d6e3750c482341a2bd78e266bf8154947
Author: Haelwenn (lanodan) Monnier <contact@hacktivis.me>
Date:   Fri,  6 Jun 2025 06:38:59 +0200

cmd/which: handle unexpected errors from access(3)

Diffstat:
M
cmd/which.c
15
+++++++++++++++

1 file changed, 15 insertions(+), 0 deletions(-)
diff --git a/cmd/which.c b/cmd/which.c
@@ -6,6 +6,7 @@
 #include "../lib/getopt_nolong.h"
 #include "../lib/strchrnul.h"
 
+#include <errno.h>
 #include <limits.h> // PATH_MAX
 #include <stdbool.h>
 #include <stdio.h>  // fprintf
@@ -84,6 +85,7 @@ main(int argc, char *argv[])
 			buflen += cmdlen;
 			buf[buflen] = '\0';
 
+			errno = 0;
 			if(access(buf, X_OK) == 0)
 			{
 				if(!opt_s) puts(buf);
@@ -93,6 +95,19 @@ main(int argc, char *argv[])
 				if(!opt_a) break;
 			}
 
+			switch(errno)
+			{
+			case ENOENT:
+			case 0:
+				break;
+			default:
+				fprintf(stderr,
+				        "which: warning: Failed checking access on file '%s': %s\n",
+				        buf,
+				        strerror(errno));
+				break;
+			}
+
 		which_cont:
 			if(*stop == '\0') break;
 			prev = stop + 1;