replace lsx with stest

Makefile

@@ -3,10 +3,10 @@
 
 include config.mk
 
-SRC = dmenu.c draw.c lsx.c
+SRC = dmenu.c draw.c stest.c
 OBJ = ${SRC:.c=.o}
 
-all: options dmenu lsx
+all: options dmenu stest
 
 options:
 	@echo dmenu build options:
@@ -24,18 +24,18 @@ dmenu: dmenu.o draw.o
 	@echo CC -o $@
 	@${CC} -o $@ dmenu.o draw.o ${LDFLAGS}
 
-lsx: lsx.o
+stest: stest.o
 	@echo CC -o $@
-	@${CC} -o $@ lsx.o ${LDFLAGS}
+	@${CC} -o $@ stest.o ${LDFLAGS}
 
 clean:
 	@echo cleaning
-	@rm -f dmenu lsx ${OBJ} dmenu-${VERSION}.tar.gz
+	@rm -f dmenu stest ${OBJ} dmenu-${VERSION}.tar.gz
 
 dist: clean
 	@echo creating dist tarball
 	@mkdir -p dmenu-${VERSION}
-	@cp LICENSE Makefile README config.mk dmenu.1 draw.h dmenu_run lsx.1 ${SRC} dmenu-${VERSION}
+	@cp LICENSE Makefile README config.mk dmenu.1 draw.h dmenu_run stest.1 ${SRC} dmenu-${VERSION}
 	@tar -cf dmenu-${VERSION}.tar dmenu-${VERSION}
 	@gzip dmenu-${VERSION}.tar
 	@rm -rf dmenu-${VERSION}
@@ -43,24 +43,24 @@ dist: clean
 install: all
 	@echo installing executables to ${DESTDIR}${PREFIX}/bin
 	@mkdir -p ${DESTDIR}${PREFIX}/bin
-	@cp -f dmenu dmenu_run lsx ${DESTDIR}${PREFIX}/bin
+	@cp -f dmenu dmenu_run stest ${DESTDIR}${PREFIX}/bin
 	@chmod 755 ${DESTDIR}${PREFIX}/bin/dmenu
 	@chmod 755 ${DESTDIR}${PREFIX}/bin/dmenu_run
-	@chmod 755 ${DESTDIR}${PREFIX}/bin/lsx
+	@chmod 755 ${DESTDIR}${PREFIX}/bin/stest
 	@echo installing manual pages to ${DESTDIR}${MANPREFIX}/man1
 	@mkdir -p ${DESTDIR}${MANPREFIX}/man1
 	@sed "s/VERSION/${VERSION}/g" < dmenu.1 > ${DESTDIR}${MANPREFIX}/man1/dmenu.1
-	@sed "s/VERSION/${VERSION}/g" < lsx.1 > ${DESTDIR}${MANPREFIX}/man1/lsx.1
+	@sed "s/VERSION/${VERSION}/g" < stest.1 > ${DESTDIR}${MANPREFIX}/man1/stest.1
 	@chmod 644 ${DESTDIR}${MANPREFIX}/man1/dmenu.1
-	@chmod 644 ${DESTDIR}${MANPREFIX}/man1/lsx.1
+	@chmod 644 ${DESTDIR}${MANPREFIX}/man1/stest.1
 
 uninstall:
 	@echo removing executables from ${DESTDIR}${PREFIX}/bin
 	@rm -f ${DESTDIR}${PREFIX}/bin/dmenu
 	@rm -f ${DESTDIR}${PREFIX}/bin/dmenu_run
-	@rm -f ${DESTDIR}${PREFIX}/bin/lsx
+	@rm -f ${DESTDIR}${PREFIX}/bin/stest
 	@echo removing manual page from ${DESTDIR}${MANPREFIX}/man1
 	@rm -f ${DESTDIR}${MANPREFIX}/man1/dmenu.1
-	@rm -f ${DESTDIR}${MANPREFIX}/man1/lsx.1
+	@rm -f ${DESTDIR}${MANPREFIX}/man1/stest.1
 
 .PHONY: all options clean dist install uninstall

config.mk

@@ -17,7 +17,7 @@ INCS = -I${X11INC}
 LIBS = -L${X11LIB} -lX11 ${XINERAMALIBS}
 
 # flags
-CPPFLAGS = -D_BSD_SOURCE -DVERSION=\"${VERSION}\" ${XINERAMAFLAGS}
+CPPFLAGS = -D_BSD_SOURCE -D_POSIX_C_SOURCE=2 -DVERSION=\"${VERSION}\" ${XINERAMAFLAGS}
 CFLAGS   = -ansi -pedantic -Wall -Os ${INCS} ${CPPFLAGS}
 LDFLAGS  = -s ${LIBS}
 

dmenu_run

@@ -5,8 +5,10 @@ if [ ! -d "`dirname "$CACHE"`" ]; then
 fi
 (
 	IFS=:
-	if [ "`ls -dt $PATH "$CACHE" | head -n 1`" != "$CACHE" ]; then
-		lsx $PATH | sort -u > "$CACHE"
+	if ls -d $PATH | stest -q -n "$CACHE"; then
+		for dir in $PATH; do
+			ls $dir | stest -C $dir -fx
+		done | sort -u > "$CACHE"
 	fi
 )
 cmd=`dmenu "$@" < "$CACHE"` && exec sh -c "$cmd"

lsx.1

@@ -1,11 +0,0 @@
-.TH LSX 1 dmenu\-VERSION
-.SH NAME
-lsx \- list executables
-.SH SYNOPSIS
-.B lsx
-.RI [ directory ...]
-.SH DESCRIPTION
-.B lsx
-lists the executables in each
-.IR directory .
-If none are given the current working directory is used.

lsx.c

@@ -1,43 +0,0 @@
-/* See LICENSE file for copyright and license details. */
-#include <dirent.h>
-#include <errno.h>
-#include <limits.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <sys/stat.h>
-
-static void lsx(const char *dir);
-
-static int status = EXIT_SUCCESS;
-
-int
-main(int argc, char *argv[]) {
-	int i;
-
-	if(argc < 2)
-		lsx(".");
-	else for(i = 1; i < argc; i++)
-		lsx(argv[i]);
-	return status;
-}
-
-void
-lsx(const char *dir) {
-	char buf[PATH_MAX];
-	struct dirent *d;
-	struct stat st;
-	DIR *dp;
-
-	for(dp = opendir(dir); dp && (d = readdir(dp)); errno = 0)
-		if(snprintf(buf, sizeof buf, "%s/%s", dir, d->d_name) < (int)sizeof buf
-		&& access(buf, X_OK) == 0 && stat(buf, &st) == 0 && S_ISREG(st.st_mode))
-			puts(d->d_name);
-
-	if(errno != 0) {
-		status = EXIT_FAILURE;
-		perror(dir);
-	}
-	if(dp)
-		closedir(dp);
-}

stest.1

@@ -0,0 +1,87 @@
+.TH STEST 1 dmenu\-VERSION
+.SH NAME
+stest \- filter a list of files by properties
+.SH SYNOPSIS
+.B stest
+.RB [ -bcdefghpqrsuwx ]
+.RB [ -C
+.IR dir ]
+.RB [ -n
+.IR file ]
+.RB [ -o
+.IR file ]
+.RI [ file ...]
+.SH DESCRIPTION
+.B stest
+takes a list of files and filters by the files' properties, analogous to
+.IR test (1).
+Files which pass all tests are printed to stdout. If no files are given as
+arguments, stest will read a list of files from stdin, one path per line.
+.SH OPTIONS
+.TP
+.BI \-C " dir"
+Tests files relative to directory
+.IR dir .
+.TP
+.B \-b
+Test that files are block specials.
+.TP
+.B \-c
+Test that files are character specials.
+.TP
+.B \-d
+Test that files are directories.
+.TP
+.B \-e
+Test that files exist.
+.TP
+.B \-f
+Test that files are regular files.
+.TP
+.B \-g
+Test that files have their set-group-ID flag set.
+.TP
+.B \-h
+Test that files are symbolic links.
+.TP
+.BI \-n " file"
+Test that files are newer than
+.IR file .
+.TP
+.BI \-o " file"
+Test that files are older than
+.IR file .
+.TP
+.B \-p
+Test that files are named pipes.
+.TP
+.B \-q
+No files are printed, only the exit status is returned.
+.TP
+.B \-r
+Test that files are readable.
+.TP
+.B \-s
+Test that files are not empty.
+.TP
+.B \-u
+Test that files have their set-user-ID flag set.
+.TP
+.B \-w
+Test that files are writable.
+.TP
+.B \-x
+Test that files are executable.
+.SH EXIT STATUS
+.TP
+.B 0
+At least one file passed all tests.
+.TP
+.B 1
+No files passed all tests.
+.TP
+.B 2
+An error occurred.
+.SH SEE ALSO
+.IR dmenu (1),
+.IR test (1)

stest.c

@@ -0,0 +1,85 @@
+/* See LICENSE file for copyright and license details. */
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/stat.h>
+
+#define OPER(x)  (oper[(x)-'a'])
+
+static bool test(const char *);
+
+static bool quiet = false;
+static bool oper[26];
+static struct stat old, new;
+
+int
+main(int argc, char *argv[]) {
+	char buf[BUFSIZ], *p;
+	bool match = false;
+	int opt;
+
+	while((opt = getopt(argc, argv, "C:bcdefghn:o:pqrsuwx")) != -1)
+		switch(opt) {
+		case 'C': /* tests relative to directory */
+			if(chdir(optarg) == -1) {
+				perror(optarg);
+				exit(2);
+			}
+			break;
+		case 'n': /* newer than file */
+		case 'o': /* older than file */
+			if(!(OPER(opt) = stat(optarg, (opt == 'n' ? &new : &old)) == 0))
+				perror(optarg);
+			break;
+		case 'q': /* quiet (no output, just status) */
+			quiet = true;
+			break;
+		default:  /* miscellaneous operators */
+			OPER(opt) = true;
+			break;
+		case '?': /* error: unknown flag */
+			fprintf(stderr, "usage: %s [-bcdefghpqrsuwx] [-C dir] [-n file] [-o file] [file...]\n", argv[0]);
+			exit(2);
+		}
+	if(optind == argc)
+		while(fgets(buf, sizeof buf, stdin)) {
+			if(*(p = &buf[strlen(buf)-1]) == '\n')
+				*p = '\0';
+			match |= test(buf);
+		}
+	else
+		while(optind < argc)
+			match |= test(argv[optind++]);
+
+	return match ? 0 : 1;
+}
+
+bool
+test(const char *path) {
+	struct stat st;
+
+	if((!OPER('b') || (stat(path, &st) == 0 && S_ISBLK(st.st_mode)))        /* block special     */
+	&& (!OPER('c') || (stat(path, &st) == 0 && S_ISCHR(st.st_mode)))        /* character special */
+	&& (!OPER('d') || (stat(path, &st) == 0 && S_ISDIR(st.st_mode)))        /* directory         */
+	&& (!OPER('e') || (access(path, F_OK) == 0))                            /* exists            */
+	&& (!OPER('f') || (stat(path, &st) == 0 && S_ISREG(st.st_mode)))        /* regular file      */
+	&& (!OPER('g') || (stat(path, &st) == 0 && (st.st_mode & S_ISGID)))     /* set-group-id flag */
+	&& (!OPER('h') || (lstat(path, &st) == 0 && S_ISLNK(st.st_mode)))       /* symbolic link     */
+	&& (!OPER('n') || (stat(path, &st) == 0 && st.st_mtime > new.st_mtime)) /* newer than file   */
+	&& (!OPER('o') || (stat(path, &st) == 0 && st.st_mtime < old.st_mtime)) /* older than file   */
+	&& (!OPER('p') || (stat(path, &st) == 0 && S_ISFIFO(st.st_mode)))       /* named pipe        */
+	&& (!OPER('r') || (access(path, R_OK) == 0))                            /* readable          */
+	&& (!OPER('s') || (stat(path, &st) == 0 && st.st_size > 0))             /* not empty         */
+	&& (!OPER('u') || (stat(path, &st) == 0 && (st.st_mode & S_ISUID)))     /* set-user-id flag  */
+	&& (!OPER('w') || (access(path, W_OK) == 0))                            /* writable          */
+	&& (!OPER('x') || (access(path, X_OK) == 0))) {                         /* executable        */
+		if(quiet)
+			exit(0);
+		puts(path);
+		return true;
+	}
+	else
+		return false;
+}