#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, ...) {
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);
+}