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 #include <ncurses.h>
  10
  11 #include "config.h"
  12 #include "options.h"
  13 #include "support.h"
  14 #include "conf.h"
  15
  16 #ifdef DEBUG
  17 #define D(x) x
  18 #else
  19 #define D(x)
  20 #endif
  21
  22 #define RCFILE "." PACKAGE "rc"
  23
  24 #define MAX_LINE_LENGTH 1024
  25 #define COMMENT_TOKEN   '#'
  26
  27 /* configuration field names */
  28 #define CONF_ENABLE_COLORS           "enable_colors"
  29 #define CONF_COLOR_BACKGROUND        "background_color"
  30 #define CONF_COLOR_TITLE             "title_color"
  31 #define CONF_COLOR_LINE              "line_color"
  32 #define CONF_COLOR_LIST              "list_color"
  33 #define CONF_COLOR_PROGRESS          "progress_color"
  34 #define CONF_COLOR_STATUS            "status_color"
  35 #define CONF_COLOR_ALERT             "alert_color"
  36
  37
  38 static int
  39 str2bool(char *str)
  40 {
  41   if( !strcasecmp(str,"no")  || !strcasecmp(str,"false") ||
  42       !strcasecmp(str,"off") || !strcasecmp(str,"0") )
  43     return 0;
  44   return 1;
  45 }
  46
  47 static int
  48 str2color(char *str)
  49 {
  50   if( !strcasecmp(str,"black") )
  51     return COLOR_BLACK;
  52   else if( !strcasecmp(str,"red") )
  53     return COLOR_RED;
  54   else if( !strcasecmp(str,"green") )
  55     return COLOR_GREEN;
  56   else if( !strcasecmp(str,"yellow") )
  57     return COLOR_YELLOW;
  58   else if( !strcasecmp(str,"blue") )
  59     return COLOR_BLUE;
  60   else if( !strcasecmp(str,"magenta") )
  61     return COLOR_MAGENTA;
  62   else if( !strcasecmp(str,"cyan") )
  63     return COLOR_CYAN;
  64   else if( !strcasecmp(str,"white") )
  65     return COLOR_WHITE;
  66 #if 0
  67    else if( !strcasecmp(str,"grey") )
  68      return COLOR_BLACK | A_BOLD;
  69   else if( !strcasecmp(str,"brightred") )
  70     return COLOR_RED | A_BOLD;
  71   else if( !strcasecmp(str,"brightgreen") )
  72     return COLOR_GREEN | A_BOLD;
  73   else if( !strcasecmp(str,"brightyellow") )
  74     return COLOR_YELLOW | A_BOLD;
  75   else if( !strcasecmp(str,"brightblue") )
  76     return COLOR_BLUE | A_BOLD;
  77   else if( !strcasecmp(str,"brightmagenta") )
  78     return COLOR_MAGENTA | A_BOLD;
  79   else if( !strcasecmp(str,"brightcyan") )
  80     return COLOR_CYAN | A_BOLD;
  81   else if( !strcasecmp(str,"brightwhite") )
  82     return COLOR_WHITE | A_BOLD;
  83 #endif
  84   fprintf(stderr,"Warning: unknown color %s\n", str);
  85   return -1;
  86 }
  87
  88 int
  89 read_rc_file(char *filename, options_t *options)
  90 {
  91   int fd;
  92   int quit  = 0;
  93   int color = -1;
  94   int free_filename = 0;
  95
  96   if( filename==NULL )
  97     {
  98       filename = concat_path(getenv("HOME"), RCFILE);
  99       free_filename = 1;
 100     }
 101
 102   D(printf("\n--Reading configuration file %s\n", filename));
 103   if( (fd=open(filename,O_RDONLY)) <0 )
 104     {
 105       D(perror(filename));
 106       if( free_filename )
 107         free(filename);
 108       return -1;
 109     }
 110
 111   while( !quit )
 112     {
 113       int i,j;
 114       int len;
 115       int match_found;
 116       char line[MAX_LINE_LENGTH];
 117       char name[MAX_LINE_LENGTH];
 118       char value[MAX_LINE_LENGTH];
 119
 120       line[0]  = '\0';
 121       value[0] = '\0';
 122
 123       i = 0;
 124       /* read a line ending with '\n' */
 125       do {
 126         len = read( fd, &line[i], 1 );
 127         if( len == 1 )
 128           i++;
 129         else
 130           quit = 1;
 131       } while( !quit && i<MAX_LINE_LENGTH && line[i-1]!='\n' );
 132
 133
 134       /* remove trailing whitespace */
 135       line[i] = '\0';
 136       i--;
 137       while( i>=0 && IS_WHITESPACE(line[i]) )
 138         {
 139           line[i] = '\0';
 140           i--;
 141         }
 142       len = i+1;
 143
 144       if( len>0 )
 145         {
 146           i = 0;
 147           /* skip whitespace */
 148           while( i<len && IS_WHITESPACE(line[i]) )
 149             i++;
 150
 151           /* continue if this line is not a comment */
 152           if( line[i] != COMMENT_TOKEN )
 153             {
 154               /* get the name part */
 155               j=0;
 156               while( i<len && line[i]!='=' && !IS_WHITESPACE(line[i]) )
 157                 {
 158                   name[j++] = line[i++];
 159                 }
 160               name[j] = '\0';
 161
 162               /* skip '=' and whitespace */
 163               while( i<len && (line[i]=='=' || IS_WHITESPACE(line[i])) )
 164                 i++;
 165
 166               /* get the value part */
 167               j=0;
 168               while( i<len )
 169                 {
 170                   value[j++] = line[i++];
 171                 }
 172               value[j] = '\0';
 173
 174               match_found = 0;
 175
 176               /* enable colors */
 177               if( !strcasecmp(CONF_ENABLE_COLORS, name) )
 178                 {
 179                   options->enable_colors = str2bool(value);
 180                   match_found = 1;
 181                 }
 182               /* background color */
 183               else if( !strcasecmp(CONF_COLOR_BACKGROUND, name) )
 184                 {
 185                   if( (color=str2color(value)) >= 0 )
 186                     options->bg_color = color;
 187                   match_found = 1;
 188                 }
 189               /* color - top (title) window */
 190               else if( !strcasecmp(CONF_COLOR_TITLE, name) )
 191                 {
 192                   if( (color=str2color(value)) >= 0 )
 193                     options->title_color = color;
 194                   match_found = 1;
 195                 }
 196               /* color - line (title) window */
 197               else if( !strcasecmp(CONF_COLOR_LINE, name) )
 198                 {
 199                   if( (color=str2color(value)) >= 0 )
 200                     options->line_color = color;
 201                   match_found = 1;
 202                 }
 203               /* color - list window */
 204               else if( !strcasecmp(CONF_COLOR_LIST, name) )
 205                 {
 206                   if( (color=str2color(value)) >= 0 )
 207                     options->list_color = color;
 208                   match_found = 1;
 209                 }
 210               /* color - progress bar */
 211               else if( !strcasecmp(CONF_COLOR_PROGRESS, name) )
 212                 {
 213                   if( (color=str2color(value)) >= 0 )
 214                     options->progress_color = color;
 215                   match_found = 1;
 216                 }
 217               /* color - status window */
 218               else if( !strcasecmp(CONF_COLOR_STATUS, name) )
 219                 {
 220                   if( (color=str2color(value)) >= 0 )
 221                     options->status_color = color;
 222                   match_found = 1;
 223                 }
 224               /* color - alerts */
 225               else if( !strcasecmp(CONF_COLOR_ALERT, name) )
 226                 {
 227                   if( (color=str2color(value)) >= 0 )
 228                     options->alert_color = color;
 229                   match_found = 1;
 230                 }
 231
 232
 233               if( !match_found )
 234                 fprintf(stderr,
 235                         "Unknown configuration parameter: %s\n",
 236                         name);
 237 #ifdef DEBUG
 238               printf( "  %s = %s %s\n",
 239                       name,
 240                       value,
 241                       match_found ? "" : "- UNKNOWN SETTING!" );
 242 #endif
 243
 244             }
 245         }
 246     }
 247
 248   D(printf( "--\n\n" ));
 249
 250   if( free_filename )
 251     free(filename);
 252
 253   return 0;
 254 }
 255
 256
 257
 258
 259
 260