parser-cfg.c

   1 #include "config.h"
   2
   3 #include <stdio.h>
   4 #include <stdlib.h>
   5 #include <string.h>
   6 #include <errno.h>
   7 #include <ctype.h>
   8
   9 #ifdef MP_DEBUG
  10 #include <assert.h>
  11 #endif
  12
  13 #include "mp_msg.h"
  14 #include "m_option.h"
  15 #include "m_config.h"
  16
  17 #define MAX_RECURSION_DEPTH     8
  18
  19 static int recursion_depth = 0;
  20
  21 int m_config_parse_config_file(m_config_t* config, char *conffile)
  22 {
  23 #define PRINT_LINENUM   mp_msg(MSGT_CFGPARSER,MSGL_V,"%s(%d): ", conffile, line_num)
  24 #define MAX_LINE_LEN    10000
  25 #define MAX_OPT_LEN     1000
  26 #define MAX_PARAM_LEN   1000
  27         FILE *fp;
  28         char *line;
  29         char opt[MAX_OPT_LEN + 1];
  30         char param[MAX_PARAM_LEN + 1];
  31         char c;         /* for the "" and '' check */
  32         int tmp;
  33         int line_num = 0;
  34         int line_pos;   /* line pos */
  35         int opt_pos;    /* opt pos */
  36         int param_pos;  /* param pos */
  37         int ret = 1;
  38         int errors = 0;
  39         int prev_mode = config->mode;
  40
  41 #ifdef MP_DEBUG
  42         assert(config != NULL);
  43         //      assert(conf_list != NULL);
  44 #endif
  45         mp_msg(MSGT_CFGPARSER,MSGL_V,"Reading config file %s", conffile);
  46
  47         if (recursion_depth > MAX_RECURSION_DEPTH) {
  48                 mp_msg(MSGT_CFGPARSER,MSGL_ERR,": too deep 'include'. check your configfiles\n");
  49                 ret = -1;
  50                 goto out;
  51         } else
  52
  53         config->mode = M_CONFIG_FILE;
  54
  55         if ((line = (char *) malloc(MAX_LINE_LEN + 1)) == NULL) {
  56                 mp_msg(MSGT_CFGPARSER,MSGL_FATAL,"\ncan't get memory for 'line': %s", strerror(errno));
  57                 ret = -1;
  58                 goto out;
  59         }
  60
  61         if ((fp = fopen(conffile, "r")) == NULL) {
  62           mp_msg(MSGT_CFGPARSER,MSGL_V,": %s\n", strerror(errno));
  63                 free(line);
  64                 ret = 0;
  65                 goto out;
  66         }
  67         mp_msg(MSGT_CFGPARSER,MSGL_INFO,"\n");
  68
  69         while (fgets(line, MAX_LINE_LEN, fp)) {
  70                 if (errors >= 16) {
  71                         mp_msg(MSGT_CFGPARSER,MSGL_FATAL,"too many errors\n");
  72                         goto out;
  73                 }
  74
  75                 line_num++;
  76                 line_pos = 0;
  77
  78                 /* skip whitespaces */
  79                 while (isspace(line[line_pos]))
  80                         ++line_pos;
  81
  82                 /* EOL / comment */
  83                 if (line[line_pos] == '\0' || line[line_pos] == '#')
  84                         continue;
  85
  86                 /* read option. */
  87                 for (opt_pos = 0; isprint(line[line_pos]) &&
  88                                 line[line_pos] != ' ' &&
  89                                 line[line_pos] != '#' &&
  90                                 line[line_pos] != '='; /* NOTHING */) {
  91                         opt[opt_pos++] = line[line_pos++];
  92                         if (opt_pos >= MAX_OPT_LEN) {
  93                                 PRINT_LINENUM;
  94                                 mp_msg(MSGT_CFGPARSER,MSGL_ERR,"too long option at line %d\n",line_num);
  95                                 errors++;
  96                                 ret = -1;
  97                                 goto nextline;
  98                         }
  99                 }
 100                 if (opt_pos == 0) {
 101                         PRINT_LINENUM;
 102                         mp_msg(MSGT_CFGPARSER,MSGL_ERR,"parse error at line %d\n",line_num);
 103                         ret = -1;
 104                         errors++;
 105                         continue;
 106                 }
 107                 opt[opt_pos] = '\0';
 108
 109 #ifdef MP_DEBUG
 110                 PRINT_LINENUM;
 111                 mp_msg(MSGT_CFGPARSER,MSGL_V,"option: %s\n", opt);
 112 #endif
 113
 114                 /* skip whitespaces */
 115                 while (isspace(line[line_pos]))
 116                         ++line_pos;
 117
 118                 /* check '=' */
 119                 if (line[line_pos++] != '=') {
 120                         PRINT_LINENUM;
 121                         mp_msg(MSGT_CFGPARSER,MSGL_ERR,"Option %s needs a parameter at line %d\n",opt,line_num);
 122                         ret = -1;
 123                         errors++;
 124                         continue;
 125                 }
 126
 127                 /* whitespaces... */
 128                 while (isspace(line[line_pos]))
 129                         ++line_pos;
 130
 131                 /* read the parameter */
 132                 if (line[line_pos] == '"' || line[line_pos] == '\'') {
 133                         c = line[line_pos];
 134                         ++line_pos;
 135                         for (param_pos = 0; line[line_pos] != c; /* NOTHING */) {
 136                                 param[param_pos++] = line[line_pos++];
 137                                 if (param_pos >= MAX_PARAM_LEN) {
 138                                         PRINT_LINENUM;
 139                                         mp_msg(MSGT_CFGPARSER,MSGL_ERR,"Option %s has a too long parameter at line %d\n",opt,line_num);
 140                                         ret = -1;
 141                                         errors++;
 142                                         goto nextline;
 143                                 }
 144                         }
 145                         line_pos++;     /* skip the closing " or ' */
 146                 } else {
 147                         for (param_pos = 0; isprint(line[line_pos]) && !isspace(line[line_pos])
 148                                         && line[line_pos] != '#'; /* NOTHING */) {
 149                                 param[param_pos++] = line[line_pos++];
 150                                 if (param_pos >= MAX_PARAM_LEN) {
 151                                         PRINT_LINENUM;
 152                                         mp_msg(MSGT_CFGPARSER,MSGL_ERR,"too long parameter\n");
 153                                         ret = -1;
 154                                         errors++;
 155                                         goto nextline;
 156                                 }
 157                         }
 158                 }
 159                 param[param_pos] = '\0';
 160
 161                 /* did we read a parameter? */
 162                 if (param_pos == 0) {
 163                         PRINT_LINENUM;
 164                         mp_msg(MSGT_CFGPARSER,MSGL_ERR,"Option %s needs a parameter at line %d\n",opt,line_num);
 165                         ret = -1;
 166                         errors++;
 167                         continue;
 168                 }
 169
 170 #ifdef MP_DEBUG
 171                 PRINT_LINENUM;
 172                 mp_msg(MSGT_CFGPARSER,MSGL_V,"parameter: %s\n", param);
 173 #endif
 174
 175                 /* now, check if we have some more chars on the line */
 176                 /* whitespace... */
 177                 while (isspace(line[line_pos]))
 178                         ++line_pos;
 179
 180                 /* EOL / comment */
 181                 if (line[line_pos] != '\0' && line[line_pos] != '#') {
 182                         PRINT_LINENUM;
 183                         mp_msg(MSGT_CFGPARSER,MSGL_WARN,"extra characters on line %d: %s\n",line_num, line+line_pos);
 184                         ret = -1;
 185                 }
 186
 187                 tmp = m_config_set_option(config, opt, param);
 188                 if (tmp < 0) {
 189                         PRINT_LINENUM;
 190                         if(tmp == M_OPT_UNKNOWN) {
 191                                 mp_msg(MSGT_CFGPARSER,MSGL_WARN,"Warning unknown option %s at line %d\n", opt,line_num);
 192                                 continue;
 193                         }
 194                         mp_msg(MSGT_CFGPARSER,MSGL_ERR,"Error parsing option %s=%s at line %d\n",opt,param,line_num);
 195                         ret = -1;
 196                         errors++;
 197                         continue;
 198                         /* break */
 199                 }
 200 nextline:
 201                 ;
 202         }
 203
 204         free(line);
 205         fclose(fp);
 206 out:
 207         config->mode = prev_mode;
 208         --recursion_depth;
 209         return ret;
 210 }