dwm/util.c

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/*
* (C)opyright MMVI Anselm R. Garbe <garbeam at gmail dot com>
* See LICENSE file for license details.
*/
#include "dwm.h"
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#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
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#include <sys/wait.h>
#include <unistd.h>
/* static */
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static void
bad_malloc(unsigned int size)
{
eprint("fatal: could not malloc() %u bytes\n", size);
}
/* extern */
void *
emallocz(unsigned int size)
{
void *res = calloc(1, size);
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if(!res)
bad_malloc(size);
return res;
}
void
eprint(const char *errstr, ...) {
va_list ap;
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va_start(ap, errstr);
vfprintf(stderr, errstr, ap);
va_end(ap);
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exit(EXIT_FAILURE);
}
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void
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spawn(Arg *arg)
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{
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char **argv = (char **)arg->argv;
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if(!argv || !argv[0])
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return;
if(fork() == 0) {
if(fork() == 0) {
if(dpy)
close(ConnectionNumber(dpy));
setsid();
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execvp(argv[0], argv);
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fprintf(stderr, "dwm: execvp %s", argv[0]);
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perror(" failed");
}
exit(0);
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}
wait(0);
}