conf.c

   1 #include <stdio.h>
   2 #include <errno.h>
   3 #include <stdlib.h>
   4 #include <unistd.h>
   5 #include <string.h>
   6 #include <sys/types.h>
   7 #include <sys/stat.h>
   8 #include <fcntl.h>
   9
  10 #include <glib.h>
  11 #include <ncurses.h>
  12
  13 #include "config.h"
  14 #include "options.h"
  15 #include "support.h"
  16 #include "conf.h"
  17
  18 #ifdef DEBUG
  19 #define D(x) x
  20 #else
  21 #define D(x)
  22 #endif
  23
  24 #define RCFILE "." PACKAGE "rc"
  25
  26 #define MAX_LINE_LENGTH 1024
  27 #define COMMENT_TOKEN   '#'
  28
  29 /* configuration field names */
  30 #define CONF_ENABLE_COLORS           "enable_colors"
  31 #define CONF_AUTO_CENTER             "auto_center"
  32
  33 /* configuration field names - colors */
  34 #define CONF_COLOR_BACKGROUND        "background_color"
  35 #define CONF_COLOR_TITLE             "title_color"
  36 #define CONF_COLOR_LINE              "line_color"
  37 #define CONF_COLOR_LIST              "list_color"
  38 #define CONF_COLOR_PROGRESS          "progress_color"
  39 #define CONF_COLOR_STATUS            "status_color"
  40 #define CONF_COLOR_ALERT             "alert_color"
  41
  42
  43 static int
  44 str2bool(char *str)
  45 {
  46   if( !strcasecmp(str,"no")  || !strcasecmp(str,"false") ||
  47       !strcasecmp(str,"off") || !strcasecmp(str,"0") )
  48     return 0;
  49   return 1;
  50 }
  51
  52 static int
  53 str2color(char *str)
  54 {
  55   if( !strcasecmp(str,"black") )
  56     return COLOR_BLACK;
  57   else if( !strcasecmp(str,"red") )
  58     return COLOR_RED;
  59   else if( !strcasecmp(str,"green") )
  60     return COLOR_GREEN;
  61   else if( !strcasecmp(str,"yellow") )
  62     return COLOR_YELLOW;
  63   else if( !strcasecmp(str,"blue") )
  64     return COLOR_BLUE;
  65   else if( !strcasecmp(str,"magenta") )
  66     return COLOR_MAGENTA;
  67   else if( !strcasecmp(str,"cyan") )
  68     return COLOR_CYAN;
  69   else if( !strcasecmp(str,"white") )
  70     return COLOR_WHITE;
  71   fprintf(stderr,"Warning: unknown color %s\n", str);
  72   return -1;
  73 }
  74
  75 int
  76 read_rc_file(char *filename, options_t *options)
  77 {
  78   int fd;
  79   int quit  = 0;
  80   int color = -1;
  81   int free_filename = 0;
  82
  83   if( filename==NULL )
  84     {
  85       filename = g_build_filename(g_get_home_dir(), RCFILE, NULL);
  86       free_filename = 1;
  87     }
  88
  89   D(printf("\n--Reading configuration file %s\n", filename));
  90   if( (fd=open(filename,O_RDONLY)) <0 )
  91     {
  92       D(perror(filename));
  93       if( free_filename )
  94         g_free(filename);
  95       return -1;
  96     }
  97
  98   while( !quit )
  99     {
 100       int i,j;
 101       int len;
 102       int match_found;
 103       char line[MAX_LINE_LENGTH];
 104       char name[MAX_LINE_LENGTH];
 105       char value[MAX_LINE_LENGTH];
 106
 107       line[0]  = '\0';
 108       value[0] = '\0';
 109
 110       i = 0;
 111       /* read a line ending with '\n' */
 112       do {
 113         len = read( fd, &line[i], 1 );
 114         if( len == 1 )
 115           i++;
 116         else
 117           quit = 1;
 118       } while( !quit && i<MAX_LINE_LENGTH && line[i-1]!='\n' );
 119
 120
 121       /* remove trailing whitespace */
 122       line[i] = '\0';
 123       i--;
 124       while( i>=0 && IS_WHITESPACE(line[i]) )
 125         {
 126           line[i] = '\0';
 127           i--;
 128         }
 129       len = i+1;
 130
 131       if( len>0 )
 132         {
 133           i = 0;
 134           /* skip whitespace */
 135           while( i<len && IS_WHITESPACE(line[i]) )
 136             i++;
 137
 138           /* continue if this line is not a comment */
 139           if( line[i] != COMMENT_TOKEN )
 140             {
 141               /* get the name part */
 142               j=0;
 143               while( i<len && line[i]!='=' && !IS_WHITESPACE(line[i]) )
 144                 {
 145                   name[j++] = line[i++];
 146                 }
 147               name[j] = '\0';
 148
 149               /* skip '=' and whitespace */
 150               while( i<len && (line[i]=='=' || IS_WHITESPACE(line[i])) )
 151                 i++;
 152
 153               /* get the value part */
 154               j=0;
 155               while( i<len )
 156                 {
 157                   value[j++] = line[i++];
 158                 }
 159               value[j] = '\0';
 160
 161               match_found = 0;
 162
 163               /* enable colors */
 164               if( !strcasecmp(CONF_ENABLE_COLORS, name) )
 165                 {
 166                   options->enable_colors = str2bool(value);
 167                   match_found = 1;
 168                 }
 169               /* auto center */
 170               else if( !strcasecmp(CONF_AUTO_CENTER, name) )
 171                 {
 172                   options->auto_center = str2bool(value);
 173                   match_found = 1;
 174                 }
 175               /* background color */
 176               else if( !strcasecmp(CONF_COLOR_BACKGROUND, name) )
 177                 {
 178                   if( (color=str2color(value)) >= 0 )
 179                     options->bg_color = color;
 180                   match_found = 1;
 181                 }
 182               /* color - top (title) window */
 183               else if( !strcasecmp(CONF_COLOR_TITLE, name) )
 184                 {
 185                   if( (color=str2color(value)) >= 0 )
 186                     options->title_color = color;
 187                   match_found = 1;
 188                 }
 189               /* color - line (title) window */
 190               else if( !strcasecmp(CONF_COLOR_LINE, name) )
 191                 {
 192                   if( (color=str2color(value)) >= 0 )
 193                     options->line_color = color;
 194                   match_found = 1;
 195                 }
 196               /* color - list window */
 197               else if( !strcasecmp(CONF_COLOR_LIST, name) )
 198                 {
 199                   if( (color=str2color(value)) >= 0 )
 200                     options->list_color = color;
 201                   match_found = 1;
 202                 }
 203               /* color - progress bar */
 204               else if( !strcasecmp(CONF_COLOR_PROGRESS, name) )
 205                 {
 206                   if( (color=str2color(value)) >= 0 )
 207                     options->progress_color = color;
 208                   match_found = 1;
 209                 }
 210               /* color - status window */
 211               else if( !strcasecmp(CONF_COLOR_STATUS, name) )
 212                 {
 213                   if( (color=str2color(value)) >= 0 )
 214                     options->status_color = color;
 215                   match_found = 1;
 216                 }
 217               /* color - alerts */
 218               else if( !strcasecmp(CONF_COLOR_ALERT, name) )
 219                 {
 220                   if( (color=str2color(value)) >= 0 )
 221                     options->alert_color = color;
 222                   match_found = 1;
 223                 }
 224
 225
 226               if( !match_found )
 227                 fprintf(stderr,
 228                         "Unknown configuration parameter: %s\n",
 229                         name);
 230 #ifdef DEBUG
 231               printf( "  %s = %s %s\n",
 232                       name,
 233                       value,
 234                       match_found ? "" : "- UNKNOWN SETTING!" );
 235 #endif
 236
 237             }
 238         }
 239     }
 240
 241   D(printf( "--\n\n" ));
 242
 243   if( free_filename )
 244     g_free(filename);
 245
 246   return 0;
 247 }
 248
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