util.c
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/*
* (C)opyright MMVI Anselm R. Garbe <garbeam at gmail dot com>
* See LICENSE file for license details.
*/
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>
#include "dwm.h"
void
error(const 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);
}
void *
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)
{
char *res = strdup(str);
if(!res)
bad_malloc(strlen(str));
return res;
}
void
swap(void **p1, void **p2)
{
void *tmp = *p1;
*p1 = *p2;
*p2 = tmp;
}
void
spawn(Arg *arg)
{
char **argv = (char **)arg->argv;
if(!argv || !argv[0])
return;
if(fork() == 0) {
if(fork() == 0) {
if(dpy)
close(ConnectionNumber(dpy));
setsid();
execvp(argv[0], argv);
fprintf(stderr, "dwm: execvp %s", argv[0]);
perror(" failed");
}
exit (0);
}
wait(0);
}