1 | /* |
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2 | * |
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3 | * expunge -- program to expunge a meeting; i.e. really delete those |
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4 | * deleted transaction. This program is linked to a server |
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5 | * so it can use the privileged procedure of create_mtg, and |
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6 | * the like. |
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7 | * |
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8 | */ |
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9 | |
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10 | #include <stdio.h> |
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11 | #include <strings.h> |
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12 | #include <sys/types.h> |
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13 | #include <sys/file.h> |
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14 | #include <sys/stat.h> |
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15 | #include <unistd.h> |
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16 | |
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17 | #include <discuss/types.h> |
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18 | #include <discuss/dsc_et.h> |
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19 | #include <discuss/tfile.h> |
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20 | #include <discuss/interface.h> |
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21 | #include <discuss/acl.h> |
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22 | #include "mtg.h" |
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23 | |
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24 | #define NULL 0 |
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25 | #define MAX_TRNS 1000 |
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26 | #define min(a, b) (a < b ? a : b) |
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27 | |
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28 | static int tempf; |
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29 | static char *mtg_name = NULL, *location = NULL, *chairman = NULL, *trn_file = NULL; |
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30 | static char *backup_location = NULL; |
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31 | static char *future_location = NULL; |
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32 | static int found_eof = 0; |
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33 | static int error_occurred = 0; |
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34 | |
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35 | tfile unix_tfile (); |
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36 | char *malloc(); |
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37 | |
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38 | extern char rpc_caller[]; |
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39 | extern int has_privs; |
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40 | extern int errno; |
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41 | extern int no_nuke; |
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42 | |
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43 | main (argc, argv) |
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44 | int argc; |
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45 | char **argv; |
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46 | { |
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47 | int i,n,low,high; |
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48 | mtg_info old_mtg_info,new_mtg_info; |
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49 | trn_info old_trn_info; |
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50 | int result; |
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51 | dsc_acl *acl_list,*new_acl_list; |
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52 | dsc_acl_entry *ae; |
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53 | char *new_modes; |
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54 | tfile tf; |
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55 | char control_name[256]; |
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56 | int control_fd; |
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57 | |
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58 | #if defined(__APPLE__) && defined(__MACH__) |
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59 | add_error_table(&et_dsc_error_table); |
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60 | #else |
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61 | initialize_dsc_error_table(); |
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62 | #endif |
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63 | |
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64 | for (i = 1; i < argc; i++) { |
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65 | if (*argv[i] == '-') switch (argv[i][1]) { |
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66 | case 'c': |
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67 | if (++i < argc) |
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68 | chairman = argv[i]; |
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69 | continue; |
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70 | |
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71 | case 'n': |
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72 | if (++i < argc) |
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73 | mtg_name = argv[i]; |
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74 | continue; |
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75 | |
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76 | default: |
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77 | goto lusage; |
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78 | } |
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79 | if (location == NULL) |
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80 | location = argv[i]; |
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81 | else goto lusage; |
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82 | } |
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83 | |
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84 | if (location == NULL) |
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85 | goto lusage; /* required */ |
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86 | |
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87 | has_privs = TRUE; /* Tell discuss we're special */ |
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88 | strcpy (rpc_caller, "expunger"); |
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89 | |
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90 | /* First, we get the mtg info to make sure it exists */ |
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91 | get_mtg_info (location, &old_mtg_info, &result); |
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92 | if (result != 0) { |
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93 | fprintf(stderr, "%s: %s while getting mtg info\n", location, error_message(result)); |
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94 | exit (1); |
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95 | } |
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96 | |
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97 | get_acl (location, &result, &acl_list); |
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98 | if (result != 0) { |
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99 | fprintf(stderr, "%s: %s while getting acl\n", location, error_message(result)); |
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100 | exit (1); |
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101 | } |
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102 | |
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103 | /* Create the new meeting */ |
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104 | backup_location = malloc (strlen(location)+5); /* be generous */ |
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105 | strcpy (backup_location, location); |
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106 | strcat (backup_location, "~"); |
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107 | |
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108 | future_location = malloc (strlen(location)+5); /* be generous */ |
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109 | strcpy (future_location, location); |
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110 | strcat (future_location, "#"); |
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111 | |
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112 | printf("Creating new meeting\n"); |
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113 | fflush(stdout); |
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114 | |
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115 | if (mtg_name == NULL) { |
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116 | mtg_name = old_mtg_info.long_name; |
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117 | } |
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118 | if (chairman == NULL) { |
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119 | chairman = old_mtg_info.chairman; |
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120 | } |
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121 | |
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122 | /* get acl's on old meeting, so we can make it new one */ |
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123 | get_acl (location, &result, &new_acl_list); |
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124 | if (result != 0) { |
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125 | fprintf(stderr, "%s: %s while getting acl\n", backup_location, error_message(result)); |
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126 | exit (1); |
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127 | } |
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128 | |
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129 | create_mtg_priv (backup_location, mtg_name, old_mtg_info.public_flag, |
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130 | old_mtg_info.date_created, chairman, |
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131 | new_acl_list, &result); |
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132 | if (result != 0) { |
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133 | fprintf (stderr, "%s: %s while creating new meeting\n", |
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134 | location, error_message(result)); |
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135 | exit (1); |
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136 | } |
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137 | |
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138 | /* now, do the actual expunging */ |
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139 | low = old_mtg_info.lowest; |
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140 | high = old_mtg_info.highest; |
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141 | create_temp (); |
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142 | |
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143 | expunge_range: |
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144 | for (i = low; i <= high; i++) { |
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145 | get_trn_info (location, i, &old_trn_info, &result); |
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146 | if (result != 0 && result != DELETED_TRN && result != EXPUNGED_TRN) { |
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147 | fprintf(stderr, |
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148 | "Error getting info for transaction [%04d]: %s\n", |
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149 | i, error_message(result)); |
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150 | error_occurred = TRUE; |
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151 | } else if (result != 0) { /* expunge it */ |
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152 | no_nuke = TRUE; |
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153 | printf("Expunging transaction [%04d]\n", i); |
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154 | expunge_trn (backup_location, i, &result); |
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155 | no_nuke = FALSE; |
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156 | if (result != 0) { |
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157 | fprintf(stderr, |
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158 | "Error expunging transaction [%04d]: %s\n", |
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159 | i, error_message(result)); |
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160 | error_occurred = TRUE; |
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161 | } |
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162 | } else if (result == 0) { |
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163 | ftruncate(tempf,0); |
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164 | lseek(tempf,0,SEEK_SET); |
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165 | tf = unix_tfile (tempf); |
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166 | |
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167 | get_trn (location, i, tf, &result); |
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168 | if (result != 0) { |
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169 | fprintf(stderr, "Error getting transaction [%04d]: %s\n", |
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170 | i, error_message(result)); |
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171 | error_occurred = TRUE; |
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172 | free(old_trn_info. author); |
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173 | free(old_trn_info.subject); |
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174 | continue; |
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175 | } |
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176 | |
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177 | tdestroy (tf); |
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178 | lseek(tempf,0,SEEK_SET); |
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179 | |
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180 | tf = unix_tfile (tempf); |
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181 | no_nuke = TRUE; |
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182 | add_trn_priv (backup_location, tf, old_trn_info.subject, |
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183 | old_trn_info.pref, old_trn_info.current, |
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184 | old_trn_info.author, old_trn_info.date_entered, |
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185 | &n, &result); |
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186 | no_nuke = FALSE; |
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187 | if (result != 0) { |
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188 | fprintf(stderr, |
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189 | "Error getting info for transaction %d: %s\n", i, |
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190 | error_message(result)); |
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191 | error_occurred = TRUE; |
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192 | } |
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193 | free(old_trn_info.author); |
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194 | free(old_trn_info.subject); |
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195 | } |
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196 | } |
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197 | |
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198 | /* Check if any new transactions have been added */ |
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199 | free(old_mtg_info.long_name); |
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200 | free(old_mtg_info.chairman); |
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201 | free(old_mtg_info.location); |
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202 | get_mtg_info(location, &old_mtg_info, &result); |
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203 | if (result != 0) { |
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204 | fprintf(stderr, "%s: %s while getting mtg info\n", location, error_message(result)); |
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205 | error_occurred = TRUE; |
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206 | } else if (old_mtg_info.highest > high) { /* New transactions added */ |
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207 | low = high+1; |
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208 | high = old_mtg_info.highest; |
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209 | goto expunge_range; |
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210 | } |
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211 | |
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212 | strcpy(control_name, location); |
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213 | strcat(control_name, "/control"); |
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214 | if ((control_fd = open (control_name, O_RDWR, 0700)) < 0) { |
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215 | error_occurred = TRUE; |
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216 | } else { |
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217 | flock(control_fd, LOCK_EX); /* Hold meeting by the balls */ |
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218 | free(old_mtg_info.long_name); |
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219 | free(old_mtg_info.chairman); |
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220 | free(old_mtg_info.location); |
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221 | |
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222 | no_nuke = TRUE; |
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223 | get_mtg_info(location, &old_mtg_info, &result); |
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224 | if (result != 0) { |
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225 | fprintf(stderr, "%s: %s while getting mtg info\n", location, error_message(result)); |
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226 | error_occurred = TRUE; |
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227 | flock(control_fd,LOCK_UN); |
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228 | close(control_fd); |
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229 | } else if (old_mtg_info.highest > high) { /* New transactions added */ |
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230 | low = high + 1; |
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231 | high = old_mtg_info.highest; |
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232 | flock(control_fd,LOCK_UN); |
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233 | close(control_fd); |
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234 | goto expunge_range; |
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235 | } |
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236 | } |
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237 | |
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238 | /* When we get here, we have the old meeting locked. Now we do the move |
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239 | as atomically as we can */ |
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240 | if (!error_occurred) { |
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241 | if (rename(location, future_location) < 0) { |
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242 | perror("rename of old meeting failed"); |
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243 | exit (1); |
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244 | } |
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245 | if (rename(backup_location, location) < 0) { |
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246 | perror("rename of new meeting"); |
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247 | exit (1); |
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248 | } |
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249 | remove_mtg (future_location, &result); |
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250 | if (result != 0) { |
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251 | fprintf(stderr, "%s: %s while removing new meeting.\n", |
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252 | location, error_message(result)); |
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253 | exit (1); |
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254 | } |
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255 | } else exit (1); /* error occurred */ |
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256 | |
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257 | exit (0); |
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258 | |
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259 | lusage: |
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260 | fprintf(stderr, "usage: expunge mtg_location {-c chairman} {-n name}\n"); |
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261 | exit (1); |
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262 | } |
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263 | |
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264 | /* |
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265 | * |
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266 | * create_temp () -- Create temp file, and let it be tempf. |
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267 | * |
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268 | */ |
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269 | create_temp() |
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270 | { |
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271 | char filename [20]; |
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272 | |
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273 | strcpy (filename, "/tmp/rcXXXXXX"); |
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274 | mktemp (filename); |
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275 | |
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276 | tempf = open (filename, O_RDWR | O_CREAT, 0700); |
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277 | if (tempf < 0) { |
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278 | fprintf (stderr, "Cannot open temp file\n"); |
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279 | exit (1); |
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280 | } |
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281 | } |
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282 | |
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283 | |
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