[hackers] [dmenu] fast dmenu_path script || Connor Lane Smith

changeset: 395:3b1b7ad976b2
tag: tip
user: Connor Lane Smith <cls_AT_lubutu.com>
date: Sat May 14 20:43:11 2011 +0100
files: Makefile dmenu.1 dmenu_path dmenu_path.c
description:
fast dmenu_path script

diff -r 9448d6224fb5 -r 3b1b7ad976b2 Makefile
--- a/Makefile Sat May 14 18:39:27 2011 +0100
+++ b/Makefile Sat May 14 20:43:11 2011 +0100
@@ -3,7 +3,7 @@
 
 include config.mk
 
-all: options dmenu dmenu_path
+all: options dmenu
 
 options:
         @echo dmenu build options:
@@ -15,22 +15,18 @@
         @echo CC -o $@
         @${CC} -o $@ dmenu.o draw.o ${LDFLAGS}
 
-dmenu_path: dmenu_path.o
- @echo CC -o $@
- @${CC} -o $@ dmenu_path.o ${LDFLAGS}
-
 .c.o: config.mk
         @echo CC -c $<
         @${CC} -c $< ${CFLAGS}
 
 clean:
         @echo cleaning
- @rm -f dmenu dmenu.o draw.o dmenu_path dmenu_path.o dmenu-${VERSION}.tar.gz
+ @rm -f dmenu dmenu.o draw.o dmenu-${VERSION}.tar.gz
 
 dist: clean
         @echo creating dist tarball
         @mkdir -p dmenu-${VERSION}
- @cp LICENSE Makefile README config.mk dmenu.1 dmenu.c draw.c draw.h dmenu_path.c dmenu_run dmenu-${VERSION}
+ @cp LICENSE Makefile README config.mk dmenu.1 dmenu.c draw.c draw.h dmenu_path dmenu_run dmenu-${VERSION}
         @tar -cf dmenu-${VERSION}.tar dmenu-${VERSION}
         @gzip dmenu-${VERSION}.tar
         @rm -rf dmenu-${VERSION}
diff -r 9448d6224fb5 -r 3b1b7ad976b2 dmenu.1
--- a/dmenu.1 Sat May 14 18:39:27 2011 +0100
+++ b/dmenu.1 Sat May 14 20:43:11 2011 +0100
@@ -42,7 +42,7 @@
 executes the selected item.
 .P
 .B dmenu_path
-is a program used by dmenu_run to find and cache a list of executables.
+is a script used by dmenu_run to find and cache a list of executables.
 .SH OPTIONS
 .TP
 .B \-b
diff -r 9448d6224fb5 -r 3b1b7ad976b2 dmenu_path
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/dmenu_path Sat May 14 20:43:11 2011 +0100
@@ -0,0 +1,9 @@
+#!/bin/sh
+CACHE=$HOME/.dmenu_cache
+IFS=:
+
+if ! test -f "$CACHE" || find $PATH -type d -newer "$CACHE" | grep -q .; then
+ find $PATH -type f \( -perm -1 -o -perm -10 -o -perm -100 \) | sort -u > "$CACHE"
+fi
+
+cat "$CACHE"
diff -r 9448d6224fb5 -r 3b1b7ad976b2 dmenu_path.c
--- a/dmenu_path.c Sat May 14 18:39:27 2011 +0100
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,100 +0,0 @@
-/* See LICENSE file for copyright and license details. */
-#include <dirent.h>
-#include <limits.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-#include <sys/stat.h>
-
-static void die(const char *s);
-static int qstrcmp(const void *a, const void *b);
-static void scan(void);
-static int uptodate(void);
-
-static char **items = NULL;
-static const char *home, *path;
-
-int
-main(void) {
- if(!(home = getenv("HOME")))
- die("no $HOME");
- if(!(path = getenv("PATH")))
- die("no $PATH");
- if(chdir(home) < 0)
- die("chdir failed");
- if(uptodate()) {
- execl("/bin/cat", "cat", CACHE, NULL);
- die("exec failed");
- }
- scan();
- return EXIT_SUCCESS;
-}
-
-void
-die(const char *s) {
- fprintf(stderr, "dmenu_path: %s\n", s);
- exit(EXIT_FAILURE);
-}
-
-int
-qstrcmp(const void *a, const void *b) {
- return strcmp(*(const char **)a, *(const char **)b);
-}
-
-void
-scan(void) {
- char buf[PATH_MAX];
- char *dir, *p;
- size_t i, count;
- struct dirent *ent;
- DIR *dp;
- FILE *cache;
-
- count = 0;
- if(!(p = strdup(path)))
- die("strdup failed");
- for(dir = strtok(p, ":"); dir; dir = strtok(NULL, ":")) {
- if(!(dp = opendir(dir)))
- continue;
- while((ent = readdir(dp))) {
- snprintf(buf, sizeof buf, "%s/%s", dir, ent->d_name);
- if(ent->d_name[0] == '.' || access(buf, X_OK) < 0)
- continue;
- if(!(items = realloc(items, ++count * sizeof *items)))
- die("malloc failed");
- if(!(items[count-1] = strdup(ent->d_name)))
- die("strdup failed");
- }
- closedir(dp);
- }
- qsort(items, count, sizeof *items, qstrcmp);
- if(!(cache = fopen(CACHE, "w")))
- die("open failed");
- for(i = 0; i < count; i++) {
- if(i > 0 && !strcmp(items[i], items[i-1]))
- continue;
- fprintf(cache, "%s\n", items[i]);
- fprintf(stdout, "%s\n", items[i]);
- }
- fclose(cache);
- free(p);
-}
-
-int
-uptodate(void) {
- char *dir, *p;
- time_t mtime;
- struct stat st;
-
- if(stat(CACHE, &st) < 0)
- return 0;
- mtime = st.st_mtime;
- if(!(p = strdup(path)))
- die("strdup failed");
- for(dir = strtok(p, ":"); dir; dir = strtok(NULL, ":"))
- if(!stat(dir, &st) && st.st_mtime > mtime)
- return 0;
- free(p);
- return 1;
-}
Received on Sat May 14 2011 - 21:43:16 CEST