Mercurial > noffle
annotate src/group.c @ 228:1ad2602f57db noffle
[svn] see Changelog Dec 18 2001
author | mirkol |
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date | Tue, 18 Dec 2001 15:27:08 +0000 |
parents | 24d4cd032da5 |
children | 6eb6c912a0e4 |
rev | line source |
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43
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1 /* |
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2 group.c |
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3 |
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4 The group database resides in groupinfo.gdbm and stores all we know about |
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5 the groups we know of. One database record is cached in the global struct |
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6 grp. Group information is transfered between the grp and the database by |
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7 loadGrp() and saveGrp(). This is done transparently. Access to the groups |
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8 database is done by group name, by the functions defined in group.h. |
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9 |
228 | 10 $Id: group.c 358 2001-12-18 15:27:08Z mirkol $ |
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11 */ |
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12 |
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13 #if HAVE_CONFIG_H |
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14 #include <config.h> |
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15 #endif |
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16 |
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17 #include <stdio.h> |
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18 #include <gdbm.h> |
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19 #include <errno.h> |
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20 #include <fcntl.h> |
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21 #include <sys/stat.h> |
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22 #include "configfile.h" |
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23 #include "group.h" |
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24 #include "log.h" |
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25 #include "util.h" |
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26 #include "portable.h" |
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27 |
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28 /* currently only used within grp */ |
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29 typedef struct |
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30 { |
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31 int first; /* number of first article within group */ |
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32 int last; /* number of last article within group */ |
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33 int rmtNext; |
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34 time_t created; |
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35 time_t lastAccess; |
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36 } Entry; |
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37 |
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38 struct |
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39 { |
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40 Str name; /* name of the group */ |
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41 Entry entry; /* more information about this group */ |
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42 Str serv; /* server the group resides on */ |
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43 Str dsc; /* description of the group */ |
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44 char postAllow; /* Posting status */ |
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45 time_t lastPost; /* Time last article arrived */ |
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46 GDBM_FILE dbf; |
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47 } grp = { "(no grp)", { 0, 0, 0, 0, 0 }, "", "", ' ', (time_t) 0, NULL }; |
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48 |
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49 /* |
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50 Note: postAllow and lastPost should really go in Entry. But |
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51 changing Entry would make backwards group file format capability |
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52 tricky, so they go where they are, and we test the length of the |
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53 retrieved record to determine if they exist. |
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54 |
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55 Someday if we really change the record format this should be tidied up. |
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56 */ |
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57 |
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58 static const char * |
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59 errMsg( void ) |
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60 { |
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61 if ( errno != 0 ) |
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62 return strerror( errno ); |
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63 return gdbm_strerror( gdbm_errno ); |
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64 } |
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65 |
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66 Bool |
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67 Grp_open( void ) |
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68 { |
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69 Str name; |
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70 int flags; |
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71 |
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72 ASSERT( grp.dbf == NULL ); |
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73 snprintf( name, MAXCHAR, "%s/data/groupinfo.gdbm", Cfg_spoolDir() ); |
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74 flags = GDBM_WRCREAT | GDBM_FAST; |
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75 if ( ! ( grp.dbf = gdbm_open( name, 512, flags, 0644, NULL ) ) ) |
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76 { |
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77 Log_err( "Error opening %s for r/w (%s)", errMsg() ); |
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78 return FALSE; |
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79 } |
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80 Log_dbg( LOG_DBG_NEWSBASE, "%s opened for r/w", name ); |
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81 return TRUE; |
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82 } |
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83 |
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84 void |
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85 Grp_close( void ) |
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86 { |
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87 ASSERT( grp.dbf ); |
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88 Log_dbg( LOG_DBG_NEWSBASE, "Closing groupinfo" ); |
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89 gdbm_close( grp.dbf ); |
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90 grp.dbf = NULL; |
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91 Utl_cpyStr( grp.name, "" ); |
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92 } |
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93 |
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94 /* |
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95 * Load group info from gdbm-database into global struct grp |
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96 * |
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97 * Note use of memcpy when packing buffer; avoids pointer alignment |
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98 * problems. |
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99 */ |
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100 static Bool |
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101 loadGrp( const char *name ) |
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102 { |
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103 const char *p; |
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104 datum key, val; |
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105 |
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106 ASSERT( grp.dbf ); |
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107 if ( strcmp( grp.name, name ) == 0 ) |
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108 return TRUE; |
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109 key.dptr = (void *)name; |
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110 key.dsize = strlen( name ) + 1; |
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111 val = gdbm_fetch( grp.dbf, key ); |
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112 if ( val.dptr == NULL ) |
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113 return FALSE; |
193
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114 memcpy( &grp.entry, val.dptr, sizeof( grp.entry ) ); |
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115 p = val.dptr + sizeof( grp.entry ); |
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116 Utl_cpyStr( grp.serv, p ); |
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117 p += strlen( p ) + 1; |
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118 Utl_cpyStr( grp.dsc, p ); |
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119 p += strlen( p) + 1; |
191
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120 |
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121 /* |
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122 * Extension items. Initialise to default first. |
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123 * We default to allowing posting, and the time |
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124 * of the last post being a second before the last |
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125 * access. |
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126 */ |
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127 grp.postAllow = 'y'; |
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128 grp.lastPost = grp.entry.lastAccess - 1; |
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129 |
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130 if ( p - val.dptr < val.dsize ) |
191
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131 { |
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132 grp.postAllow = p[ 0 ]; |
191
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133 p++; |
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134 if ( p - val.dptr < val.dsize ) |
193
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135 memcpy( &grp.lastPost, p, sizeof( grp.lastPost ) ); |
191
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136 } |
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137 |
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138 Utl_cpyStr( grp.name, name ); |
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139 free( val.dptr ); |
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140 return TRUE; |
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141 } |
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142 |
193
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143 /* |
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144 * Save group info from global struct grp into gdbm-database |
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145 * |
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146 * Note use of memcpy when packing buffer; avoids pointer alignment |
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147 * problems. |
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148 */ |
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149 static void |
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150 saveGrp( void ) |
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151 { |
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152 size_t lenServ, lenDsc, bufLen; |
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153 datum key, val; |
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154 void *buf; |
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155 char *p; |
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156 |
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157 ASSERT( grp.dbf ); |
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158 lenServ = strlen( grp.serv ); |
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159 lenDsc = strlen( grp.dsc ); |
191
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160 bufLen = |
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161 sizeof( grp.entry ) + lenServ + lenDsc + 2 |
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162 + sizeof( char ) + sizeof( time_t ); |
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163 buf = malloc( bufLen ); |
193
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164 memcpy( buf, &grp.entry, sizeof( grp.entry ) ); |
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165 p = (char *)buf + sizeof( grp.entry ); |
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166 strcpy( p, grp.serv ); |
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167 p += lenServ + 1; |
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168 strcpy( p, grp.dsc ); |
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169 p += lenDsc + 1; |
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170 p[ 0 ] = grp.postAllow; |
191
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171 p++; |
193
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172 memcpy( p, &grp.lastPost, sizeof( grp.lastPost ) ); |
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173 key.dptr = (void *)grp.name; |
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174 key.dsize = strlen( grp.name ) + 1; |
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175 val.dptr = buf; |
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176 val.dsize = bufLen; |
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177 if ( gdbm_store( grp.dbf, key, val, GDBM_REPLACE ) != 0 ) |
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178 Log_err( "Could not save group %s: %s", errMsg() ); |
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179 free( buf ); |
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180 } |
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181 |
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182 Bool |
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183 Grp_exists( const char *name ) |
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184 { |
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185 datum key; |
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186 |
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187 ASSERT( grp.dbf ); |
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188 key.dptr = (void*)name; |
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189 key.dsize = strlen( name ) + 1; |
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190 return gdbm_exists( grp.dbf, key ); |
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191 } |
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192 |
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193 Bool |
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194 Grp_local( const char *name ) |
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195 { |
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196 if ( ! loadGrp( name ) ) |
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197 return 0; |
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198 return ( strcmp( grp.serv, GRP_LOCAL_SERVER_NAME ) == 0 ); |
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199 } |
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200 |
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201 void |
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202 Grp_create( const char *name ) |
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203 { |
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204 Utl_cpyStr( grp.name, name ); |
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205 Utl_cpyStr( grp.serv, "(unknown)" ); |
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206 grp.dsc[ 0 ] = '\0'; |
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207 grp.entry.first = 1; |
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208 grp.entry.last = 0; |
102 | 209 grp.entry.rmtNext = GRP_RMT_NEXT_NOT_SUBSCRIBED; |
127 | 210 grp.entry.created = time( NULL ); |
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211 grp.entry.lastAccess = 0; |
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212 grp.postAllow = 'y'; |
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213 saveGrp(); |
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214 } |
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215 |
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216 void |
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217 Grp_delete( const char *name ) |
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218 { |
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219 datum key; |
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220 |
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221 ASSERT( grp.dbf ); |
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222 key.dptr = (void*)name; |
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223 key.dsize = strlen( name ) + 1; |
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224 gdbm_delete( grp.dbf, key ); |
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225 } |
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226 |
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227 const char * |
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228 Grp_dsc( const char *name ) |
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229 { |
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230 if ( ! loadGrp( name ) ) |
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231 return NULL; |
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232 return grp.dsc; |
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233 } |
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234 |
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235 const char * |
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236 Grp_server( const char *name ) |
43
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237 { |
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238 static Str serv = ""; |
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239 |
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240 if ( ! loadGrp( name ) ) |
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241 return "[unknown grp]"; |
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242 if ( Cfg_servListContains( grp.serv ) |
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243 || Grp_local( name ) ) |
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244 Utl_cpyStr( serv, grp.serv ); |
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245 else |
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246 snprintf( serv, MAXCHAR, "[%s]", grp.serv ); |
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247 return serv; |
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248 } |
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249 |
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250 int |
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251 Grp_first( const char *name ) |
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252 { |
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253 if ( ! loadGrp( name ) ) |
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254 return 0; |
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255 return grp.entry.first; |
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256 } |
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257 |
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258 int |
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259 Grp_last( const char *name ) |
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260 { |
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261 if ( ! loadGrp( name ) ) |
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262 return 0; |
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263 return grp.entry.last; |
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264 } |
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265 |
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266 int |
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267 Grp_lastAccess( const char *name ) |
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268 { |
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269 if ( ! loadGrp( name ) ) |
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270 return 0; |
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271 return grp.entry.lastAccess; |
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272 } |
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273 |
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274 int |
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275 Grp_rmtNext( const char *name ) |
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276 { |
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277 if ( ! loadGrp( name ) ) |
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278 return 0; |
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279 return grp.entry.rmtNext; |
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280 } |
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281 |
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282 time_t |
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283 Grp_created( const char *name ) |
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284 { |
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285 if ( ! loadGrp( name ) ) |
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286 return 0; |
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287 return grp.entry.created; |
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288 } |
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289 |
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290 char |
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291 Grp_postAllow( const char *name ) |
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292 { |
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293 if ( ! loadGrp( name ) ) |
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294 return 0; |
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295 return grp.postAllow; |
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296 } |
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297 |
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298 |
191
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299 time_t |
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300 Grp_lastPostTime( const char *name ) |
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301 { |
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302 if ( ! loadGrp( name ) ) |
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303 return 0; |
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304 return grp.lastPost; |
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305 } |
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306 |
43
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307 /* Replace group's description (only if value != ""). */ |
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308 void |
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309 Grp_setDsc( const char *name, const char *value ) |
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310 { |
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311 if ( loadGrp( name ) ) |
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312 { |
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313 Utl_cpyStr( grp.dsc, value ); |
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314 saveGrp(); |
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315 } |
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316 } |
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317 |
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318 void |
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319 Grp_setLocal( const char *name ) |
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320 { |
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321 Grp_setServ( name, GRP_LOCAL_SERVER_NAME ); |
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322 } |
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323 |
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324 void |
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325 Grp_setServ( const char *name, const char *value ) |
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326 { |
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327 if ( loadGrp( name ) ) |
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328 { |
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329 Utl_cpyStr( grp.serv, value ); |
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330 saveGrp(); |
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331 } |
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332 } |
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333 |
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334 void |
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335 Grp_setRmtNext( const char *name, int value ) |
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336 { |
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337 if ( loadGrp( name ) ) |
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338 { |
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339 grp.entry.rmtNext = value; |
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340 saveGrp(); |
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341 } |
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342 } |
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343 |
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344 void |
191
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345 Grp_setLastAccess( const char *name ) |
43
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346 { |
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347 if ( loadGrp( name ) ) |
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348 { |
191
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349 grp.entry.lastAccess = time( NULL ); |
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350 saveGrp(); |
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351 } |
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352 } |
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353 |
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354 void |
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355 Grp_setPostAllow( const char *name, char postAllow ) |
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356 { |
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357 if ( loadGrp( name ) ) |
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358 { |
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359 grp.postAllow = postAllow; |
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360 saveGrp(); |
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361 } |
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362 } |
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363 |
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364 void |
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365 Grp_setFirstLast( const char *name, int first, int last ) |
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366 { |
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367 if ( loadGrp( name ) ) |
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368 { |
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369 grp.entry.first = first; |
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370 grp.entry.last = last; |
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371 saveGrp(); |
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372 } |
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373 } |
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374 |
191
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375 void |
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376 Grp_setLastPostTime( const char *name ) |
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377 { |
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378 if ( loadGrp( name ) ) |
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379 { |
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380 grp.lastPost = time( NULL ); |
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381 saveGrp(); |
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382 } |
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383 } |
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384 |
43
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385 static datum cursor = { NULL, 0 }; |
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386 |
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387 Bool |
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388 Grp_firstGrp( const char **name ) |
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389 { |
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390 ASSERT( grp.dbf ); |
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391 if ( cursor.dptr != NULL ) |
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392 { |
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393 free( cursor.dptr ); |
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394 cursor.dptr = NULL; |
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395 } |
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396 cursor = gdbm_firstkey( grp.dbf ); |
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397 *name = cursor.dptr; |
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398 return ( cursor.dptr != NULL ); |
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399 } |
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400 |
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401 Bool |
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402 Grp_nextGrp( const char **name ) |
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403 { |
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404 void *oldDptr = cursor.dptr; |
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405 |
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406 ASSERT( grp.dbf ); |
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407 if ( cursor.dptr == NULL ) |
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408 return FALSE; |
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409 cursor = gdbm_nextkey( grp.dbf, cursor ); |
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410 free( oldDptr ); |
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411 *name = cursor.dptr; |
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412 return ( cursor.dptr != NULL ); |
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413 } |
228 | 414 |
415 Bool | |
416 Grp_isValidGroupName( const char *name) | |
417 { | |
418 const char *pname, *ppat; | |
419 const char *illegalchars = "\t\n\r,"; /* Are there any other illegal characters? */ | |
420 | |
421 /* Find directory prefixes to prevent exploits. */ | |
422 switch ( name[0] ) | |
423 { | |
424 case '.': /* prevent noffle -C ../fetchlist */ | |
425 case '/': /* prevent noffle -C /etc/noffle.conf */ | |
426 case ':': | |
427 case '\\': | |
428 return FALSE; /* group name invalid */ | |
429 } | |
430 | |
431 /* Find illegal characters. */ | |
432 if ( strpbrk( name, illegalchars ) ) | |
433 return FALSE; | |
434 | |
435 /* Find "all", "all.*", "*.all" or "*.all.*" */ | |
436 pname = name; | |
437 while ( ppat = strstr( pname, "all" ) ) | |
438 { | |
439 if ( ( ppat == name || *(ppat - 1) == '.' ) | |
440 && ( *(ppat+4) == '\0' || *(ppat+4) == '.' ) ) | |
441 return FALSE; | |
442 else | |
443 pname += 3; | |
444 } | |
445 | |
446 /* Group name is hopefully valid. */ | |
447 return TRUE; | |
448 } |