141 lines
2.1 KiB
C
141 lines
2.1 KiB
C
/*
|
|
* (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 "util.h"
|
|
|
|
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);
|
|
}
|
|
|
|
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)
|
|
{
|
|
void *res = strdup(str);
|
|
if(!res)
|
|
bad_malloc(strlen(str));
|
|
return res;
|
|
}
|
|
|
|
void
|
|
failed_assert(char *a, char *file, int line)
|
|
{
|
|
fprintf(stderr, "Assertion \"%s\" failed at %s:%d\n", a, file, line);
|
|
abort();
|
|
}
|
|
|
|
void
|
|
swap(void **p1, void **p2)
|
|
{
|
|
void *tmp = *p1;
|
|
*p1 = *p2;
|
|
*p2 = tmp;
|
|
}
|
|
|
|
void
|
|
spawn(Display *dpy, char *argv[])
|
|
{
|
|
if(!argv || !argv[0])
|
|
return;
|
|
if(fork() == 0) {
|
|
if(fork() == 0) {
|
|
if(dpy)
|
|
close(ConnectionNumber(dpy));
|
|
setsid();
|
|
execvp(argv[0], argv);
|
|
fprintf(stderr, "gridwm: execvp %s", argv[0]);
|
|
perror(" failed");
|
|
}
|
|
exit (0);
|
|
}
|
|
wait(0);
|
|
}
|
|
|
|
void
|
|
pipe_spawn(char *buf, unsigned int len, Display *dpy, char *argv[])
|
|
{
|
|
unsigned int l, n;
|
|
int pfd[2];
|
|
|
|
if(!argv || !argv[0])
|
|
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]);
|
|
execvp(argv[0], argv);
|
|
fprintf(stderr, "gridwm: execvp %s", argv[0]);
|
|
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 < len ? n : len - 1] = 0;
|
|
}
|
|
wait(0);
|
|
}
|