140 lines
2.1 KiB
C
140 lines
2.1 KiB
C
/*
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* (C)opyright MMVI Anselm R. Garbe <garbeam at gmail dot com>
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* See LICENSE file for license details.
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*/
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#include <stdarg.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/types.h>
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#include <sys/wait.h>
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#include <unistd.h>
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#include "util.h"
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void
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error(char *errstr, ...) {
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va_list ap;
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va_start(ap, errstr);
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vfprintf(stderr, errstr, ap);
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va_end(ap);
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exit(1);
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}
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static void
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bad_malloc(unsigned int size)
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{
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fprintf(stderr, "fatal: could not malloc() %d bytes\n",
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(int) size);
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exit(1);
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}
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void *
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emallocz(unsigned int size)
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{
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void *res = calloc(1, size);
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if(!res)
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bad_malloc(size);
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return res;
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}
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void *
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emalloc(unsigned int size)
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{
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void *res = malloc(size);
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if(!res)
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bad_malloc(size);
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return res;
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}
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void *
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erealloc(void *ptr, unsigned int size)
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{
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void *res = realloc(ptr, size);
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if(!res)
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bad_malloc(size);
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return res;
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}
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char *
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estrdup(const char *str)
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{
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void *res = strdup(str);
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if(!res)
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bad_malloc(strlen(str));
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return res;
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}
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void
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failed_assert(char *a, char *file, int line)
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{
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fprintf(stderr, "Assertion \"%s\" failed at %s:%d\n", a, file, line);
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abort();
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}
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void
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swap(void **p1, void **p2)
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{
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void *tmp = *p1;
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*p1 = *p2;
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*p2 = tmp;
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}
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void
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spawn(Display *dpy, char *argv[])
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{
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if(!argv || !argv[0])
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return;
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if(fork() == 0) {
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if(fork() == 0) {
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if(dpy)
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close(ConnectionNumber(dpy));
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setsid();
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execvp(argv[0], argv);
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fprintf(stderr, "gridwm: execvp %s", argv[0]);
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perror(" failed");
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}
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exit (0);
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}
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wait(0);
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}
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void
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pipe_spawn(char *buf, unsigned int len, Display *dpy, char *argv[])
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{
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unsigned int l, n;
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int pfd[2];
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if(!argv || !argv[0])
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return;
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if(pipe(pfd) == -1) {
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perror("pipe");
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exit(1);
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}
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if(fork() == 0) {
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if(dpy)
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close(ConnectionNumber(dpy));
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setsid();
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dup2(pfd[1], STDOUT_FILENO);
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close(pfd[0]);
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close(pfd[1]);
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execvp(argv[0], argv);
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fprintf(stderr, "gridwm: execvp %s", argv[0]);
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perror(" failed");
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}
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else {
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n = 0;
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close(pfd[1]);
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while(l > n) {
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if((l = read(pfd[0], buf + n, len - n)) < 1)
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break;
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n += l;
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}
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close(pfd[0]);
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buf[n < len ? n : len - 1] = 0;
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}
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wait(0);
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}
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