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