bsetroot_wallpaper.c

/*
 * Copyright (c) 2004 - 2016 Han Boetes <hboetes@gmail.com>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#include "fbsetbg.h"

/* This module forwards arguments to bsetroot and remembers them on succesfull
 * execution. */
int
bsetroot_wallpaper(int argc, char *argv[], int remember)
{
        char *arguments[MAXARGS];
        int i, pid, ret;
        char *optstring, *tempstring = ""; /* stupid compiler :-) */

        optstring = malloc(MAXPATHLEN);
        if (optstring == NULL)
                err(1, "out of memory");

        /* The arguments have to be shifted */
        for(i = 1; i < argc && i < MAXARGS; i++)
                arguments[i - 1] = argv[i];

        /* The mantra for executing something in the background. */
        pid = fork();
        if (pid == -1)
                err(1, "couldn't fork");

        if (!pid)
        {
                ret = execvp("bsetroot", arguments);
                if (ret == -1)
                {
                        ret = execvp("fbsetroot", arguments);
                        if (ret == -1)
                                /* Not that bsetroot can actually return errors,
                                 * but suppose it doesn't exist. */
                                err(1, "executing your bsetroot command failed");
                }
        }

        if (pid)
                waitpid(pid, NULL, 0);

        if (remember == REMEMBER)
        {
                /* Copy the arguments to a string. */
                for(i = 1; arguments[i] != 0; i++)
                {
                        if ((tempstring = strdup(optstring)) == NULL)
                                err(1, "out of memory");
                        ret = snprintf(optstring, MAXPATHLEN,
                            "%s %s", tempstring, arguments[i]);
                        if (ret < 0 || ret >= MAXPATHLEN)
                                errx(1, "too many arguments to save");
                        free(tempstring);
                }
                write_lastwallpaper("bsetroot", optstring);
        }
        free(optstring);
        return (TRUE);
}