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/* evilwm - Minimalist Window Manager for X |
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* Copyright (C) 1999-2006 Ciaran Anscomb <evilwm@6809.org.uk> |
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* see README for license and other details. */ |
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#include <X11/Xproto.h> |
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#include <stdlib.h> |
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#include <stdarg.h> |
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#include <signal.h> |
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#include <sys/wait.h> |
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#include <unistd.h> |
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#include "evilwm.h" |
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#include "log.h" |
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int need_client_tidy = 0; |
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int ignore_xerror = 0; |
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/* Now do this by fork()ing twice so we don't have to worry about SIGCHLDs */ |
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void spawn(const char *const cmd[]) { |
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ScreenInfo *current_screen = find_current_screen(); |
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pid_t pid; |
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if (current_screen && current_screen->display) |
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putenv(current_screen->display); |
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if (!(pid = fork())) { |
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setsid(); |
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switch (fork()) { |
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/* Expect compiler warnings because of half-broken SUS |
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* execvp prototype: "char *const argv[]" should have |
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* been "const char *const argv[]", but the committee |
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* favored legacy code over modern code, and modern |
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* compilers bark at our extra const. (LD) */ |
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case 0: execvp(cmd[0], cmd+1); |
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default: _exit(0); |
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} |
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} |
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if (pid > 0) |
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wait(NULL); |
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} |
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void handle_signal(int signo) { |
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int i; |
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(void)signo; /* unused */ |
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/* SIGCHLD check no longer necessary */ |
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/* Quit Nicely */ |
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while(head_client) remove_client(head_client); |
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XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime); |
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if (font) XFreeFont(dpy, font); |
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for (i = 0; i < num_screens; i++) { |
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XFreeGC(dpy, screens[i].invert_gc); |
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XInstallColormap(dpy, DefaultColormap(dpy, i)); |
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} |
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free(screens); |
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XCloseDisplay(dpy); |
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exit(0); |
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} |
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|
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int handle_xerror(Display *dsply, XErrorEvent *e) { |
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Client *c; |
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(void)dsply; /* unused */ |
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if (ignore_xerror) { |
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LOG_DEBUG("handle_xerror() ignored an XErrorEvent: %d\n", e->error_code); |
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return 0; |
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} |
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/* If this error actually occurred while setting up the new |
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* window, best let make_new_client() know not to bother */ |
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if (initialising != None && e->resourceid == initialising) { |
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LOG_DEBUG("\t **SAVED?** handle_xerror() caught error %d while initialising\n", e->error_code); |
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initialising = None; |
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return 0; |
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} |
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LOG_DEBUG("**ERK** handle_xerror() caught an XErrorEvent: error_code=%d request_code=%d minor_code=%d\n", |
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e->error_code, e->request_code, e->minor_code); |
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if (e->error_code == BadAccess && e->request_code == X_ChangeWindowAttributes) { |
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LOG_ERROR("root window unavailable (maybe another wm is running?)\n"); |
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exit(1); |
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} |
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c = find_client(e->resourceid); |
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if (c) { |
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LOG_DEBUG("\thandle_xerror() : flagging client for removal\n"); |
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c->remove = 1; |
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need_client_tidy = 1; |
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} |
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return 0; |
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} |
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