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/* evilwm - Minimalist Window Manager for X
* Copyright (C) 1999-2007 Ciaran Anscomb <evilwm@6809.org.uk>
* see README for license and other details. */
#include <X11/Xproto.h>
#include <stdlib.h>
#include <stdarg.h>
#include <signal.h>
#include <sys/wait.h>
#include <unistd.h>
#include "evilwm.h"
#include "log.h"
int need_client_tidy = 0;
int ignore_xerror = 0;
/* Now do this by fork()ing twice so we don't have to worry about SIGCHLDs */
void spawn(const char *const cmd[]) {
ScreenInfo *current_screen = find_current_screen();
pid_t pid;
if (current_screen && current_screen->display)
putenv(current_screen->display);
if (!(pid = fork())) {
setsid();
switch (fork()) {
/* Expect compiler warnings because of half-broken SUS
* execvp prototype: "char *const argv[]" should have
* been "const char *const argv[]", but the committee
* favored legacy code over modern code, and modern
* compilers bark at our extra const. (LD) */
case 0: execvp(cmd[0], cmd+1);
default: _exit(0);
}
}
if (pid > 0)
wait(NULL);
}
void handle_signal(int signo) {
int i;
(void)signo; /* unused */
/* SIGCHLD check no longer necessary */
/* Quit Nicely */
while(head_client) remove_client(head_client);
XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
if (font) XFreeFont(dpy, font);
for (i = 0; i < num_screens; i++) {
XFreeGC(dpy, screens[i].invert_gc);
XInstallColormap(dpy, DefaultColormap(dpy, i));
}
free(screens);
XCloseDisplay(dpy);
exit(0);
}
int handle_xerror(Display *dsply, XErrorEvent *e) {
Client *c;
(void)dsply; /* unused */
if (ignore_xerror) {
LOG_DEBUG("handle_xerror() ignored an XErrorEvent: %d\n", e->error_code);
return 0;
}
/* If this error actually occurred while setting up the new
* window, best let make_new_client() know not to bother */
if (initialising != None && e->resourceid == initialising) {
LOG_DEBUG("\t **SAVED?** handle_xerror() caught error %d while initialising\n", e->error_code);
initialising = None;
return 0;
}
LOG_DEBUG("**ERK** handle_xerror() caught an XErrorEvent: error_code=%d request_code=%d minor_code=%d\n",
e->error_code, e->request_code, e->minor_code);
if (e->error_code == BadAccess && e->request_code == X_ChangeWindowAttributes) {
LOG_ERROR("root window unavailable (maybe another wm is running?)\n");
exit(1);
}
c = find_client(e->resourceid);
if (c) {
LOG_DEBUG("\thandle_xerror() : flagging client for removal\n");
c->remove = 1;
need_client_tidy = 1;
}
return 0;
}
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