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/* (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);
}
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