0.1.9 initial svn release

git-svn-id: http://dzen.googlecode.com/svn/trunk@1 f2baff5b-bf2c-0410-a398-912abdc3d8b2

1 files changed, 62 insertions, 0 deletions

diff --git a/util.c b/util.c
new file mode 100644
index 0000000..d584a4a
--- /dev/null
+++ b/util.c
@@ -0,0 +1,62 @@
+/* (C)opyright MMVI-MMVII Anselm R. Garbe <garbeam at gmail dot com>
+ * (C)opyright MMVII Robert Manea <rob dot manea  at gmail dot com>
+ * See LICENSE file for license details.
+ */
+
+#include "dzen.h"
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/wait.h>
+#include <unistd.h>
+
+void *
+emalloc(unsigned int size) {
+	void *res = malloc(size);
+
+	if(!res)
+		eprint("fatal: could not malloc() %u bytes\n", size);
+	return res;
+}
+
+void
+eprint(const char *errstr, ...) {
+	va_list ap;
+
+	va_start(ap, errstr);
+	vfprintf(stderr, errstr, ap);
+	va_end(ap);
+	exit(EXIT_FAILURE);
+}
+
+char *
+estrdup(const char *str) {
+	void *res = strdup(str);
+
+	if(!res)
+		eprint("fatal: could not malloc() %u bytes\n", strlen(str));
+	return res;
+}
+void
+spawn(const char *arg) {
+	static char *shell = NULL;
+
+	if(!shell && !(shell = getenv("SHELL")))
+		shell = "/bin/sh";
+	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) {
+			setsid();
+			execl(shell, shell, "-c", arg, (char *)NULL);
+			fprintf(stderr, "dzen: execl '%s -c %s'", shell, arg);
+			perror(" failed");
+		}
+		exit(0);
+	}
+	wait(0);
+}
+