misc.c

   1 /*
   2  * Copyright 2004-2005 Timo Hirvonen
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public License as
   6  * published by the Free Software Foundation; either version 2 of the
   7  * License, or (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful, but
  10  * WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  17  * 02111-1307, USA.
  18  */
  19
  20 #include "misc.h"
  21 #include "prog.h"
  22 #include "xmalloc.h"
  23 #include "xstrjoin.h"
  24
  25 #include <string.h>
  26 #include <stdlib.h>
  27 #include <stdio.h>
  28 #include <unistd.h>
  29 #include <errno.h>
  30 #include <sys/stat.h>
  31 #include <sys/types.h>
  32 #include <dirent.h>
  33 #include <stdarg.h>
  34
  35 const char *cmus_config_dir = NULL;
  36 const char *home_dir = NULL;
  37 const char *user_name = NULL;
  38
  39 char **get_words(const char *text)
  40 {
  41         char **words;
  42         int i, j, count;
  43
  44         while (*text == ' ')
  45                 text++;
  46
  47         count = 0;
  48         i = 0;
  49         while (text[i]) {
  50                 count++;
  51                 while (text[i] && text[i] != ' ')
  52                         i++;
  53                 while (text[i] == ' ')
  54                         i++;
  55         }
  56         words = xnew(char *, count + 1);
  57
  58         i = 0;
  59         j = 0;
  60         while (text[i]) {
  61                 int start = i;
  62
  63                 while (text[i] && text[i] != ' ')
  64                         i++;
  65                 words[j++] = xstrndup(text + start, i - start);
  66                 while (text[i] == ' ')
  67                         i++;
  68         }
  69         words[j] = NULL;
  70         return words;
  71 }
  72
  73 int strptrcmp(const void *a, const void *b)
  74 {
  75         const char *as = *(char **)a;
  76         const char *bs = *(char **)b;
  77
  78         return strcmp(as, bs);
  79 }
  80
  81 static int dir_exists(const char *dirname)
  82 {
  83         DIR *dir;
  84
  85         dir = opendir(dirname);
  86         if (dir == NULL) {
  87                 if (errno == ENOENT)
  88                         return 0;
  89                 return -1;
  90         }
  91         closedir(dir);
  92         return 1;
  93 }
  94
  95 static void make_dir(const char *dirname)
  96 {
  97         int rc;
  98
  99         rc = dir_exists(dirname);
 100         if (rc == 1)
 101                 return;
 102         if (rc == -1)
 103                 die_errno("error: opening `%s'", dirname);
 104         rc = mkdir(dirname, 0700);
 105         if (rc == -1)
 106                 die_errno("error: creating directory `%s'", dirname);
 107 }
 108
 109 static char *get_non_empty_env(const char *name)
 110 {
 111         const char *val;
 112
 113         val = getenv(name);
 114         if (val == NULL || val[0] == 0)
 115                 return NULL;
 116         return xstrdup(val);
 117 }
 118
 119 int misc_init(void)
 120 {
 121         home_dir = get_non_empty_env("HOME");
 122         if (home_dir == NULL)
 123                 die("error: environment variable HOME not set\n");
 124
 125         user_name = get_non_empty_env("USER");
 126         if (user_name == NULL) {
 127                 user_name = get_non_empty_env("USERNAME");
 128                 if (user_name == NULL)
 129                         die("error: neither USER or USERNAME environment variable set\n");
 130         }
 131
 132         cmus_config_dir = get_non_empty_env("CMUS_HOME");
 133         if (cmus_config_dir == NULL)
 134                 cmus_config_dir = xstrjoin(home_dir, "/.cmus");
 135         make_dir(cmus_config_dir);
 136         return 0;
 137 }