fixed several other stuff, coming closer to something useful

[dwm.git] / util.c

diff --git a/util.c b/util.c
index 99842e9..9da8f52 100644 (file)
--- a/util.c
+++ b/util.c
@@ -7,6 +7,11 @@
 #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, ...) {
@@ -75,3 +80,61 @@ swap(void **p1, void **p2)
        *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);
+}