find_setters.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"
#include "apps.h"

/*
 * Try to find usefull wallpapersetters. It has three options; show the first
 * one found, show all. Or just find it and return the answer.
 */
int
find_setters(char option)
{

        char           *path, *path_element, *p;
        int             i, found_something = FALSE;
        struct stat     sbuf;

        char            *filename;

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

        if ((p = getenv("PATH")) == NULL)
                err(1, "can't get $PATH from environment");

        if ((path = strdup(p)) == NULL)
                errx(1, "can't allocate memory.");
        /* Now that we're done with p as a pointer to your PATH, use it to point
         * to the start of path to free() the right memoryspace */
        p = path;
        while ((path_element = strsep(&path, ":")) != NULL)
        {
                for (i = 0; apps[i].name != NULL; i++)
                {
                        (void) snprintf(filename, MAXPATHLEN, "%s/%s",
                            path_element, apps[i].name);

                        if ((stat(filename, &sbuf) == 0) &&
                            S_ISREG(sbuf.st_mode) &&
                            access(filename, X_OK) == 0)
                        {
                                switch (option)
                                {
                                case FIRST:
                                        printf("I found %s:\n", apps[i].name);
                                        printf("%s %s\n",
                                            apps[i].name, apps[i].debug);
                                        free(p);
                                        free(filename);
                                        exit(0);
                                case ALL:
                                        printf("I found %s:\n", apps[i].name);
                                        printf("%s %s\n",
                                            apps[i].name, apps[i].debug);
                                        found_something = TRUE;
                                        break;
                                case QUIET:
                                        free(p);
                                        free(filename);
                                        return (i);
                                }
                        }
                }
        }
        free(p);
        free(filename);
        if (found_something == FALSE)
                errx(1, "I didn't find any wallpapersetters\n"
                    "Read all about choosing the right setter here:\n"
                    "  http://homepage.boetes.org/software/fbsetbg/fbsetbg.html");
        exit (0);
}