mirror of
https://github.com/awesomeWM/awesome
synced 2024-10-01 06:35:20 +02:00
120 lines
2.9 KiB
C
120 lines
2.9 KiB
C
/*
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* util.c - useful functions
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*
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* Copyright © 2007 Julien Danjou <julien@danjou.info>
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* Copyright © 2006 Pierre Habouzit <madcoder@debian.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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*/
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#include <stdarg.h>
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#include <stdio.h>
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#include <sys/wait.h>
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#include <unistd.h>
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#include <X11/Xutil.h>
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#include <X11/Xatom.h>
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#include "util.h"
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void
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eprint(const char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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vfprintf(stderr, fmt, ap);
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va_end(ap);
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exit(EXIT_FAILURE);
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}
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void
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uicb_spawn(Display * disp,
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DC *drawcontext __attribute__ ((unused)),
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awesome_config * awesomeconf __attribute__ ((unused)),
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const char *arg)
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{
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static char *shell = NULL;
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if(!shell && !(shell = getenv("SHELL")))
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shell = strdup("/bin/sh");
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if(!arg)
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return;
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/* The double-fork construct avoids zombie processes and keeps the code
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* clean from stupid signal handlers. */
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if(fork() == 0)
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{
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if(fork() == 0)
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{
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if(disp)
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close(ConnectionNumber(disp));
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setsid();
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execl(shell, shell, "-c", arg, (char *) NULL);
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fprintf(stderr, "awesome: execl '%s -c %s'", shell, arg);
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perror(" failed");
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}
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exit(EXIT_SUCCESS);
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}
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wait(0);
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}
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Bool
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xgettextprop(Display *disp, Window w, Atom atom, char *text, unsigned int size)
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{
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char **list = NULL;
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int n;
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XTextProperty name;
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if(!text || size == 0)
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return False;
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text[0] = '\0';
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XGetTextProperty(disp, w, &name, atom);
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if(!name.nitems)
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return False;
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if(name.encoding == XA_STRING)
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strncpy(text, (char *) name.value, size - 1);
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else if(XmbTextPropertyToTextList(disp, &name, &list, &n) >= Success && n > 0 && *list)
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{
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strncpy(text, *list, size - 1);
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XFreeStringList(list);
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}
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text[size - 1] = '\0';
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XFree(name.value);
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return True;
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}
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double
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compute_new_value_from_arg(const char *arg, double current_value)
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{
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double delta;
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if(arg && sscanf(arg, "%lf", &delta) == 1)
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{
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if(arg[0] == '+' || arg[0] == '-')
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current_value += delta;
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else
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current_value = delta;
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}
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return current_value;
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}
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