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_COLOR_BACKGROUND        "background_color"
  32 #define CONF_COLOR_TITLE             "title_color"
  33 #define CONF_COLOR_LINE              "line_color"
  34 #define CONF_COLOR_LIST              "list_color"
  35 #define CONF_COLOR_PROGRESS          "progress_color"
  36 #define CONF_COLOR_STATUS            "status_color"
  37 #define CONF_COLOR_ALERT             "alert_color"
  38
  39
  40 static int
  41 str2bool(char *str)
  42 {
  43   if( !strcasecmp(str,"no")  || !strcasecmp(str,"false") ||
  44       !strcasecmp(str,"off") || !strcasecmp(str,"0") )
  45     return 0;
  46   return 1;
  47 }
  48
  49 static int
  50 str2color(char *str)
  51 {
  52   if( !strcasecmp(str,"black") )
  53     return COLOR_BLACK;
  54   else if( !strcasecmp(str,"red") )
  55     return COLOR_RED;
  56   else if( !strcasecmp(str,"green") )
  57     return COLOR_GREEN;
  58   else if( !strcasecmp(str,"yellow") )
  59     return COLOR_YELLOW;
  60   else if( !strcasecmp(str,"blue") )
  61     return COLOR_BLUE;
  62   else if( !strcasecmp(str,"magenta") )
  63     return COLOR_MAGENTA;
  64   else if( !strcasecmp(str,"cyan") )
  65     return COLOR_CYAN;
  66   else if( !strcasecmp(str,"white") )
  67     return COLOR_WHITE;
  68 #if 0
  69    else if( !strcasecmp(str,"grey") )
  70      return COLOR_BLACK | A_BOLD;
  71   else if( !strcasecmp(str,"brightred") )
  72     return COLOR_RED | A_BOLD;
  73   else if( !strcasecmp(str,"brightgreen") )
  74     return COLOR_GREEN | A_BOLD;
  75   else if( !strcasecmp(str,"brightyellow") )
  76     return COLOR_YELLOW | A_BOLD;
  77   else if( !strcasecmp(str,"brightblue") )
  78     return COLOR_BLUE | A_BOLD;
  79   else if( !strcasecmp(str,"brightmagenta") )
  80     return COLOR_MAGENTA | A_BOLD;
  81   else if( !strcasecmp(str,"brightcyan") )
  82     return COLOR_CYAN | A_BOLD;
  83   else if( !strcasecmp(str,"brightwhite") )
  84     return COLOR_WHITE | A_BOLD;
  85 #endif
  86   fprintf(stderr,"Warning: unknown color %s\n", str);
  87   return -1;
  88 }
  89
  90 int
  91 read_rc_file(char *filename, options_t *options)
  92 {
  93   int fd;
  94   int quit  = 0;
  95   int color = -1;
  96   int free_filename = 0;
  97
  98   if( filename==NULL )
  99     {
 100       filename = concat_path(getenv("HOME"), RCFILE);
 101       free_filename = 1;
 102     }
 103
 104   D(printf("\n--Reading configuration file %s\n", filename));
 105   if( (fd=open(filename,O_RDONLY)) <0 )
 106     {
 107       D(perror(filename));
 108       if( free_filename )
 109         g_free(filename);
 110       return -1;
 111     }
 112
 113   while( !quit )
 114     {
 115       int i,j;
 116       int len;
 117       int match_found;
 118       char line[MAX_LINE_LENGTH];
 119       char name[MAX_LINE_LENGTH];
 120       char value[MAX_LINE_LENGTH];
 121
 122       line[0]  = '\0';
 123       value[0] = '\0';
 124
 125       i = 0;
 126       /* read a line ending with '\n' */
 127       do {
 128         len = read( fd, &line[i], 1 );
 129         if( len == 1 )
 130           i++;
 131         else
 132           quit = 1;
 133       } while( !quit && i<MAX_LINE_LENGTH && line[i-1]!='\n' );
 134
 135
 136       /* remove trailing whitespace */
 137       line[i] = '\0';
 138       i--;
 139       while( i>=0 && IS_WHITESPACE(line[i]) )
 140         {
 141           line[i] = '\0';
 142           i--;
 143         }
 144       len = i+1;
 145
 146       if( len>0 )
 147         {
 148           i = 0;
 149           /* skip whitespace */
 150           while( i<len && IS_WHITESPACE(line[i]) )
 151             i++;
 152
 153           /* continue if this line is not a comment */
 154           if( line[i] != COMMENT_TOKEN )
 155             {
 156               /* get the name part */
 157               j=0;
 158               while( i<len && line[i]!='=' && !IS_WHITESPACE(line[i]) )
 159                 {
 160                   name[j++] = line[i++];
 161                 }
 162               name[j] = '\0';
 163
 164               /* skip '=' and whitespace */
 165               while( i<len && (line[i]=='=' || IS_WHITESPACE(line[i])) )
 166                 i++;
 167
 168               /* get the value part */
 169               j=0;
 170               while( i<len )
 171                 {
 172                   value[j++] = line[i++];
 173                 }
 174               value[j] = '\0';
 175
 176               match_found = 0;
 177
 178               /* enable colors */
 179               if( !strcasecmp(CONF_ENABLE_COLORS, name) )
 180                 {
 181                   options->enable_colors = str2bool(value);
 182                   match_found = 1;
 183                 }
 184               /* background color */
 185               else if( !strcasecmp(CONF_COLOR_BACKGROUND, name) )
 186                 {
 187                   if( (color=str2color(value)) >= 0 )
 188                     options->bg_color = color;
 189                   match_found = 1;
 190                 }
 191               /* color - top (title) window */
 192               else if( !strcasecmp(CONF_COLOR_TITLE, name) )
 193                 {
 194                   if( (color=str2color(value)) >= 0 )
 195                     options->title_color = color;
 196                   match_found = 1;
 197                 }
 198               /* color - line (title) window */
 199               else if( !strcasecmp(CONF_COLOR_LINE, name) )
 200                 {
 201                   if( (color=str2color(value)) >= 0 )
 202                     options->line_color = color;
 203                   match_found = 1;
 204                 }
 205               /* color - list window */
 206               else if( !strcasecmp(CONF_COLOR_LIST, name) )
 207                 {
 208                   if( (color=str2color(value)) >= 0 )
 209                     options->list_color = color;
 210                   match_found = 1;
 211                 }
 212               /* color - progress bar */
 213               else if( !strcasecmp(CONF_COLOR_PROGRESS, name) )
 214                 {
 215                   if( (color=str2color(value)) >= 0 )
 216                     options->progress_color = color;
 217                   match_found = 1;
 218                 }
 219               /* color - status window */
 220               else if( !strcasecmp(CONF_COLOR_STATUS, name) )
 221                 {
 222                   if( (color=str2color(value)) >= 0 )
 223                     options->status_color = color;
 224                   match_found = 1;
 225                 }
 226               /* color - alerts */
 227               else if( !strcasecmp(CONF_COLOR_ALERT, name) )
 228                 {
 229                   if( (color=str2color(value)) >= 0 )
 230                     options->alert_color = color;
 231                   match_found = 1;
 232                 }
 233
 234
 235               if( !match_found )
 236                 fprintf(stderr,
 237                         "Unknown configuration parameter: %s\n",
 238                         name);
 239 #ifdef DEBUG
 240               printf( "  %s = %s %s\n",
 241                       name,
 242                       value,
 243                       match_found ? "" : "- UNKNOWN SETTING!" );
 244 #endif
 245
 246             }
 247         }
 248     }
 249
 250   D(printf( "--\n\n" ));
 251
 252   if( free_filename )
 253     g_free(filename);
 254
 255   return 0;
 256 }
 257
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