stest: get rid of getopt, use suckless arg.h

... also some style improvements.

Makefile

@@ -22,7 +22,7 @@ config.h:
 	@echo creating $@ from config.def.h
 	@cp config.def.h $@
 
-${OBJ}: config.h config.mk drw.h
+${OBJ}: arg.h config.h config.mk drw.h
 
 dmenu: dmenu.o drw.o util.o
 	@echo CC -o $@
@@ -39,8 +39,8 @@ clean:
 dist: clean
 	@echo creating dist tarball
 	@mkdir -p dmenu-${VERSION}
-	@cp LICENSE Makefile README config.mk dmenu.1 drw.h util.h dmenu_path \
-		dmenu_run stest.1 ${SRC} dmenu-${VERSION}
+	@cp LICENSE Makefile README arg.h config.mk dmenu.1 drw.h util.h \
+		dmenu_path dmenu_run stest.1 ${SRC} dmenu-${VERSION}
 	@tar -cf dmenu-${VERSION}.tar dmenu-${VERSION}
 	@gzip dmenu-${VERSION}.tar
 	@rm -rf dmenu-${VERSION}

arg.h

@@ -0,0 +1,63 @@
+/*
+ * Copy me if you can.
+ * by 20h
+ */
+
+#ifndef ARG_H__
+#define ARG_H__
+
+extern char *argv0;
+
+/* use main(int argc, char *argv[]) */
+#define ARGBEGIN	for (argv0 = *argv, argv++, argc--;\
+					argv[0] && argv[0][1]\
+					&& argv[0][0] == '-';\
+					argc--, argv++) {\
+				char argc_;\
+				char **argv_;\
+				int brk_;\
+				if (argv[0][1] == '-' && argv[0][2] == '\0') {\
+					argv++;\
+					argc--;\
+					break;\
+				}\
+				for (brk_ = 0, argv[0]++, argv_ = argv;\
+						argv[0][0] && !brk_;\
+						argv[0]++) {\
+					if (argv_ != argv)\
+						break;\
+					argc_ = argv[0][0];\
+					switch (argc_)
+
+/* Handles obsolete -NUM syntax */
+#define ARGNUM				case '0':\
+					case '1':\
+					case '2':\
+					case '3':\
+					case '4':\
+					case '5':\
+					case '6':\
+					case '7':\
+					case '8':\
+					case '9'
+
+#define ARGEND			}\
+			}
+
+#define ARGC()		argc_
+
+#define ARGNUMF(base)	(brk_ = 1, estrtol(argv[0], (base)))
+
+#define EARGF(x)	((argv[0][1] == '\0' && argv[1] == NULL)?\
+				((x), abort(), (char *)0) :\
+				(brk_ = 1, (argv[0][1] != '\0')?\
+					(&argv[0][1]) :\
+					(argc--, argv++, argv[0])))
+
+#define ARGF()		((argv[0][1] == '\0' && argv[1] == NULL)?\
+				(char *)0 :\
+				(brk_ = 1, (argv[0][1] != '\0')?\
+					(&argv[0][1]) :\
+					(argc--, argv++, argv[0])))
+
+#endif

stest.c

@@ -1,63 +1,28 @@
 /* See LICENSE file for copyright and license details. */
+#include <sys/stat.h>
+
 #include <dirent.h>
-#include <stdbool.h>
+#include <limits.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
-#include <sys/stat.h>
+
+#include "arg.h"
+char *argv0;
 
 #define FLAG(x)  (flag[(x)-'a'])
 
 static void test(const char *, const char *);
+static void usage(void);
 
-static bool match = false;
-static bool flag[26];
+static int match = 0;
+static int flag[26];
 static struct stat old, new;
 
-int
-main(int argc, char *argv[]) {
-	struct dirent *d;
-	char buf[BUFSIZ], *p;
-	DIR *dir;
-	int opt;
-
-	while((opt = getopt(argc, argv, "abcdefghln:o:pqrsuvwx")) != -1)
-		switch(opt) {
-		case 'n': /* newer than file */
-		case 'o': /* older than file */
-			if(!(FLAG(opt) = !stat(optarg, (opt == 'n' ? &new : &old))))
-				perror(optarg);
-			break;
-		default:  /* miscellaneous operators */
-			FLAG(opt) = true;
-			break;
-		case '?': /* error: unknown flag */
-			fprintf(stderr, "usage: %s [-abcdefghlpqrsuvwx] [-n file] [-o file] [file...]\n", argv[0]);
-			exit(2);
-		}
-	if(optind == argc)
-		while(fgets(buf, sizeof buf, stdin)) {
-			if((p = strchr(buf, '\n')))
-				*p = '\0';
-			test(buf, buf);
-		}
-	for(; optind < argc; optind++)
-		if(FLAG('l') && (dir = opendir(argv[optind]))) {
-			/* test directory contents */
-			while((d = readdir(dir)))
-				if(snprintf(buf, sizeof buf, "%s/%s", argv[optind], d->d_name) < sizeof buf)
-					test(buf, d->d_name);
-			closedir(dir);
-		}
-		else
-			test(argv[optind], argv[optind]);
-
-	return match ? 0 : 1;
-}
-
-void
-test(const char *path, const char *name) {
+static void
+test(const char *path, const char *name)
+{
 	struct stat st, ln;
 
 	if ((!stat(path, &st) && (FLAG('a') || name[0] != '.')        /* hidden files      */
@@ -78,7 +43,67 @@ test(const char *path, const char *name) {
 	&& (!FLAG('x') || access(path, X_OK) == 0)) != FLAG('v')) {   /* executable        */
 		if (FLAG('q'))
 			exit(0);
-		match = true;
+		match = 1;
 		puts(name);
 	}
 }
+
+static void
+usage(void)
+{
+	fprintf(stderr, "usage: %s [-abcdefghlpqrsuvwx] "
+	        "[-n file] [-o file] [file...]\n", argv0);
+	exit(2); /* like test(1) return > 1 on error */
+}
+
+int
+main(int argc, char *argv[])
+{
+	struct dirent *d;
+	char path[PATH_MAX], *line = NULL, *file;
+	size_t linesiz = 0;
+	ssize_t n;
+	DIR *dir;
+	int r;
+
+	ARGBEGIN {
+	case 'n': /* newer than file */
+	case 'o': /* older than file */
+		file = EARGF(usage());
+		if (!(FLAG(ARGC()) = !stat(file, (ARGC() == 'n' ? &new : &old))))
+			perror(file);
+		break;
+	default:
+		/* miscellaneous operators */
+		if (strchr("abcdefghlpqrsuvwx", ARGC()))
+			FLAG(ARGC()) = 1;
+		else
+			usage(); /* unknown flag */
+	} ARGEND;
+
+	if (!argc) {
+		/* read list from stdin */
+		while ((n = getline(&line, &linesiz, stdin)) > 0) {
+			if (n && line[n - 1] == '\n')
+				line[n - 1] = '\0';
+			test(line, line);
+		}
+		free(line);
+	} else {
+		for (; argc; argc--, argv++) {
+			if (FLAG('l') && (dir = opendir(*argv))) {
+				/* test directory contents */
+				while ((d = readdir(dir))) {
+					r = snprintf(path, sizeof path, "%s/%s",
+					             *argv, d->d_name);
+					if (r >= 0 && (size_t)r < sizeof path)
+						test(path, d->d_name);
+				}
+				closedir(dir);
+			} else {
+				test(*argv, *argv);
+			}
+		}
+	}
+	return match ? 0 : 1;
+}