added gridsel to gridwm

[dwm.git] / util.c

diff --git a/util.c b/util.c
index 435069f..052d535 100644 (file)
--- a/util.c
+++ b/util.c
@@ -10,9 +10,12 @@
 #include <sys/types.h>
 #include <sys/wait.h>
 #include <unistd.h>
+#include <X11/Xatom.h>
 
 #include "util.h"
 
+static char *shell = NULL;
+
 void
 error(char *errstr, ...) {
        va_list ap;
@@ -82,19 +85,103 @@ swap(void **p1, void **p2)
 }
 
 void
-spawn(Display *dpy, const char *shell, const char *cmd)
+spawn(Display *dpy, const char *cmd)
 {
-       if(!cmd || !shell)
+       if(!shell && !(shell = getenv("SHELL")))
+               shell = "/bin/sh";
+
+       if(!cmd)
                return;
        if(fork() == 0) {
                if(fork() == 0) {
                        if(dpy)
                                close(ConnectionNumber(dpy));
-                       execl(shell, shell, "-c", cmd, (const char *)0);
-                       fprintf(stderr, "gridwm: execl %s", shell);
+                       setsid();
+                       fprintf(stderr, "gridwm: execlp %s %s -c %s", shell, shell, cmd);
+                       execlp(shell, shell, "-c", cmd, NULL);
+                       fprintf(stderr, "gridwm: execlp %s", cmd);
                        perror(" failed");
                }
                exit (0);
        }
        wait(0);
 }
+
+void
+pipe_spawn(char *buf, unsigned int len, Display *dpy, const char *cmd)
+{
+       unsigned int l, n;
+       int pfd[2];
+
+       if(!shell && !(shell = getenv("SHELL")))
+               shell = "/bin/sh";
+
+       if(!cmd)
+               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]);
+               execlp(shell, shell, "-c", cmd, NULL);
+               fprintf(stderr, "gridwm: execlp %s", cmd);
+               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 - 1] = 0;
+       }
+       wait(0);
+}
+
+
+unsigned char *
+getselection(unsigned long offset, unsigned long *len, unsigned long *remain)
+{
+       Display *dpy;
+       Atom xa_clip_string;
+       Window w;
+       XEvent ev;
+       Atom typeret;
+       int format;
+       unsigned char *data;
+       unsigned char *result = NULL;
+
+       dpy = XOpenDisplay(0);
+       if(!dpy)
+               return NULL;
+       xa_clip_string = XInternAtom(dpy, "_SEL_STRING", False);
+       w = XCreateSimpleWindow(dpy, DefaultRootWindow(dpy), 10, 10, 200, 200,
+                       1, CopyFromParent, CopyFromParent);
+       XConvertSelection(dpy, XA_PRIMARY, XA_STRING, xa_clip_string,
+                       w, CurrentTime);
+       XFlush(dpy);
+       XNextEvent(dpy, &ev);
+       if(ev.type == SelectionNotify && ev.xselection.property != None) {
+               XGetWindowProperty(dpy, w, ev.xselection.property, offset, 4096L, False,
+                               AnyPropertyType, &typeret, &format, len, remain, &data);
+               if(*len) {
+                       result = emalloc(sizeof(unsigned char) * *len);
+                       memcpy(result, data, *len);
+               }
+               XDeleteProperty(dpy, w, ev.xselection.property);
+       }
+       XDestroyWindow(dpy, w);
+       XCloseDisplay(dpy);
+       return result;
+}