X-Git-Url: https://jasonwoof.com/gitweb/?p=dwm.git;a=blobdiff_plain;f=util.c;h=d39d73c65b26873d3d2e59f4eb1633b17a13c7f6;hp=c0f248961241cb285381591b8e3f479e05d0dfc3;hb=2091200c957783deed032380d56c4199a23c6b81;hpb=16c67f32d62849792c8e6d4fdec22a1896f9c279

diff --git a/util.c b/util.c
index c0f2489..d39d73c 100644
--- a/util.c
+++ b/util.c
@@ -1,149 +1,52 @@
-/*
- * (C)opyright MMVI Anselm R. Garbe <garbeam at gmail dot com>
- * See LICENSE file for license details.
- */
-
+/* See LICENSE file for copyright and license details. */
+#include "dwm.h"
 #include <stdarg.h>
 #include <stdio.h>
 #include <stdlib.h>
-#include <string.h>
-#include <sys/types.h>
 #include <sys/wait.h>
 #include <unistd.h>
 
-#include "util.h"
-
-static char *shell = NULL;
-
-void
-error(char *errstr, ...) {
-	va_list ap;
-	va_start(ap, errstr);
-	vfprintf(stderr, errstr, ap);
-	va_end(ap);
-	exit(1);
-}
-
-static void
-bad_malloc(unsigned int size)
-{
-	fprintf(stderr, "fatal: could not malloc() %d bytes\n",
-			(int) size);
-	exit(1);
-}
+/* extern */
 
 void *
-emallocz(unsigned int size)
-{
+emallocz(unsigned int size) {
 	void *res = calloc(1, size);
-	if(!res)
-		bad_malloc(size);
-	return res;
-}
-
-void *
-emalloc(unsigned int size)
-{
-	void *res = malloc(size);
-	if(!res)
-		bad_malloc(size);
-	return res;
-}
-
-void *
-erealloc(void *ptr, unsigned int size)
-{
-	void *res = realloc(ptr, size);
-	if(!res)
-		bad_malloc(size);
-	return res;
-}
 
-char *
-estrdup(const char *str)
-{
-	void *res = strdup(str);
 	if(!res)
-		bad_malloc(strlen(str));
+		eprint("fatal: could not malloc() %u bytes\n", size);
 	return res;
 }
 
 void
-failed_assert(char *a, char *file, int line)
-{
-	fprintf(stderr, "Assertion \"%s\" failed at %s:%d\n", a, file, line);
-	abort();
-}
+eprint(const char *errstr, ...) {
+	va_list ap;
 
-void
-swap(void **p1, void **p2)
-{
-	void *tmp = *p1;
-	*p1 = *p2;
-	*p2 = tmp;
+	va_start(ap, errstr);
+	vfprintf(stderr, errstr, ap);
+	va_end(ap);
+	exit(EXIT_FAILURE);
 }
 
 void
-spawn(Display *dpy, const char *cmd)
-{
+spawn(const char *arg) {
+	static char *shell = NULL;
+
 	if(!shell && !(shell = getenv("SHELL")))
 		shell = "/bin/sh";
-
-	if(!cmd)
+	if(!arg)
 		return;
+	/* The double-fork construct avoids zombie processes and keeps the code
+	 * clean from stupid signal handlers. */
 	if(fork() == 0) {
 		if(fork() == 0) {
 			if(dpy)
 				close(ConnectionNumber(dpy));
 			setsid();
-			fprintf(stderr, "gridwm: execlp %s %s -c %s", shell, shell, cmd);
-			execlp(shell, shell, "-c", cmd, NULL);
-			fprintf(stderr, "gridwm: execlp %s", cmd);
+			execl(shell, shell, "-c", arg, (char *)NULL);
+			fprintf(stderr, "dwm: execl '%s -c %s'", shell, arg);
 			perror(" failed");
 		}
-		exit (0);
-	}
-	wait(0);
-}
-
-void
-pipe_spawn(char *buf, unsigned int len, Display *dpy, const char *cmd)
-{
-	unsigned int l, n;
-	int pfd[2];
-
-	if(!shell && !(shell = getenv("SHELL")))
-		shell = "/bin/sh";
-
-	if(!cmd)
-		return;
-
-	if(pipe(pfd) == -1) {
-		perror("pipe");
-		exit(1);
-	}
-
-	if(fork() == 0) {
-		if(dpy)
-			close(ConnectionNumber(dpy));
-		setsid();
-		dup2(pfd[1], STDOUT_FILENO);
-		close(pfd[0]);
-		close(pfd[1]);
-		execlp(shell, shell, "-c", cmd, NULL);
-		fprintf(stderr, "gridwm: execlp %s", cmd);
-		perror(" failed");
-	}
-	else {
-		n = 0;
-		close(pfd[1]);
-		while(l > n) {
-			if((l = read(pfd[0], buf + n, len - n)) < 1)
-				break;
-			n += l;
-		}
-		close(pfd[0]);
-		buf[n - 1] = 0;
+		exit(0);
 	}
 	wait(0);
 }