discovered perror(3)

pschdir/pschdir.c

@@ -1,6 +1,7 @@
 #include <errno.h> /* EACCESS, ELOOP, ENAMETOOLONG, ENOENT, ENOTDIR, errno */
 #include <stdio.h> /* fprintf(3) */
 #include <stdlib.h> /* stderr */
+#include <string.h> /* strerror(3) */
 #include <sysexits.h> /* EX_OSERR, EX_NOPERM, EX_NOINPUT, EX_UNAVAILABLE,
                        * EX_USAGE */
 #include <unistd.h> /* chdir(2) */
@@ -17,26 +18,15 @@ int main(int argc, char *argv[]){
 	}
 
 	if(chdir(argv[1]) != 0){
-		fprintf(stderr, "%s: %s: ", argv[0], argv[1]);
+		fprintf(stderr, "%s: %s: %s", argv[0], argv[1],
+			strerror(errno));
 		switch(errno){
-		case EACCES:
-			fprintf(stderr, "Access to directory denied.\n");
-			return EX_NOPERM;
-		case ELOOP:
-			fprintf(stderr, "Symbolic link loop.\n");
-			return EX_UNAVAILABLE;
-		case ENAMETOOLONG:
-			fprintf(stderr, "Name too long.\n");
-			return EX_OSERR;
-		case ENOENT:
-			fprintf(stderr, "Not found.\n");
-			return EX_NOINPUT;
-		case ENOTDIR:
-			fprintf(stderr, "Not a directory.\n");
-			return EX_NOINPUT;
-		default:
-			fprintf(stderr, "Unknown error.\n");
-			return EX_UNAVAILABLE;
+		case EACCES:	return EX_NOPERM;
+		case ELOOP:	return EX_UNAVAILABLE;
+		case ENAMETOOLONG:	return EX_OSERR;
+		case ENOENT:	return EX_NOINPUT;
+		case ENOTDIR:	return EX_NOINPUT;
+		default:	return EX_UNAVAILABLE;
 		}
 	}