| 1 | # |
| 2 | |
| 3 | #include "rcv.h" |
| 4 | #include <sys/stat.h> |
| 5 | |
| 6 | /* |
| 7 | * Rcv -- receive mail rationally. |
| 8 | * |
| 9 | * Termination processing. |
| 10 | */ |
| 11 | |
| 12 | static char *SccsId = "@(#)quit.c 1.4 %G%"; |
| 13 | |
| 14 | /* |
| 15 | * Save all of the undetermined messages at the top of "mbox" |
| 16 | * Save all untouched messages back in the system mailbox. |
| 17 | * Remove the system mailbox, if none saved there. |
| 18 | */ |
| 19 | |
| 20 | quit() |
| 21 | { |
| 22 | int mcount, p, modify, autohold, anystat; |
| 23 | FILE *ibuf, *obuf, *fbuf, *rbuf; |
| 24 | register struct message *mp; |
| 25 | register int c; |
| 26 | extern char tempQuit[], tempResid[]; |
| 27 | struct stat minfo; |
| 28 | |
| 29 | /* |
| 30 | * If we are read only, we can't do anything, |
| 31 | * so just return quickly. |
| 32 | */ |
| 33 | |
| 34 | if (readonly) |
| 35 | return; |
| 36 | /* |
| 37 | * See if there any messages to save in mbox. If no, we |
| 38 | * can save copying mbox to /tmp and back. |
| 39 | * |
| 40 | * Check also to see if any files need to be preserved. |
| 41 | * Delete all untouched messages to keep them out of mbox. |
| 42 | * If all the messages are to be preserved, just exit with |
| 43 | * a message. |
| 44 | * |
| 45 | * If the luser has sent mail to himself, refuse to do |
| 46 | * anything with the mailbox, unless mail locking works. |
| 47 | */ |
| 48 | |
| 49 | lock(mailname); |
| 50 | #ifndef CANLOCK |
| 51 | if (selfsent) { |
| 52 | printf("You have new mail.\n"); |
| 53 | unlock(); |
| 54 | return; |
| 55 | } |
| 56 | #endif |
| 57 | rbuf = NULL; |
| 58 | if (stat(mailname, &minfo) >= 0 && minfo.st_size > mailsize) { |
| 59 | printf("New mail has arrived.\n"); |
| 60 | rbuf = fopen(tempResid, "w"); |
| 61 | fbuf = fopen(mailname, "r"); |
| 62 | if (rbuf == NULL || fbuf == NULL) |
| 63 | goto newmail; |
| 64 | #ifdef APPEND |
| 65 | fseek(fbuf, mailsize, 0); |
| 66 | while ((c = getc(fbuf)) != EOF) |
| 67 | putc(c, rbuf); |
| 68 | #else |
| 69 | p = minfo.st_size - mailsize; |
| 70 | while (p-- > 0) { |
| 71 | c = getc(fbuf); |
| 72 | if (c == EOF) |
| 73 | goto newmail; |
| 74 | putc(c, rbuf); |
| 75 | } |
| 76 | #endif |
| 77 | fclose(fbuf); |
| 78 | fclose(rbuf); |
| 79 | if ((rbuf = fopen(tempResid, "r")) == NULL) |
| 80 | goto newmail; |
| 81 | remove(tempResid); |
| 82 | } |
| 83 | |
| 84 | /* |
| 85 | * Adjust the message flags in each message. |
| 86 | */ |
| 87 | |
| 88 | anystat = 0; |
| 89 | for (mp = &message[0]; mp < &message[msgCount]; mp++) { |
| 90 | if (mp->m_flag & MNEW) { |
| 91 | mp->m_flag &= ~MNEW; |
| 92 | mp->m_flag |= MSTATUS; |
| 93 | } |
| 94 | if (mp->m_flag & MSTATUS) |
| 95 | anystat++; |
| 96 | if (mp->m_flag & MDELETED) |
| 97 | mp->m_flag = MDELETED|MTOUCH; |
| 98 | if ((mp->m_flag & MTOUCH) == 0) |
| 99 | mp->m_flag |= MDELETED; |
| 100 | } |
| 101 | autohold = value("hold") != NOSTR; |
| 102 | modify = 0; |
| 103 | for (c = 0, p = 0, mp = &message[0]; mp < &message[msgCount]; mp++) { |
| 104 | if ((mp->m_flag & (MSAVED|MDELETED)) == 0 && autohold) |
| 105 | mp->m_flag |= MPRESERVE; |
| 106 | if ((mp->m_flag & (MSAVED|MDELETED|MPRESERVE)) == 0) |
| 107 | c++; |
| 108 | if ((mp->m_flag & MPRESERVE) || (mp->m_flag & MTOUCH) == 0) |
| 109 | p++; |
| 110 | if (mp->m_flag & MODIFY) |
| 111 | modify++; |
| 112 | } |
| 113 | if (p == msgCount && !modify && !anystat) { |
| 114 | if (p == 1) |
| 115 | printf("Held 1 message in %s\n", mailname); |
| 116 | else |
| 117 | printf("Held %2d messages in %s\n", p, mailname); |
| 118 | unlock(); |
| 119 | return; |
| 120 | } |
| 121 | if (c == 0) { |
| 122 | if (p != 0) { |
| 123 | writeback(rbuf); |
| 124 | unlock(); |
| 125 | return; |
| 126 | } |
| 127 | goto cream; |
| 128 | } |
| 129 | |
| 130 | /* |
| 131 | * Create another temporary file and copy user's mbox file |
| 132 | * darin. If there is no mbox, copy nothing. |
| 133 | * If he has specified "append" don't copy his mailbox, |
| 134 | * just copy saveable entries at the end. |
| 135 | */ |
| 136 | |
| 137 | mcount = c; |
| 138 | if (value("append") == NOSTR) { |
| 139 | if ((obuf = fopen(tempQuit, "w")) == NULL) { |
| 140 | perror(tempQuit); |
| 141 | unlock(); |
| 142 | return; |
| 143 | } |
| 144 | if ((ibuf = fopen(tempQuit, "r")) == NULL) { |
| 145 | perror(tempQuit); |
| 146 | remove(tempQuit); |
| 147 | fclose(obuf); |
| 148 | unlock(); |
| 149 | return; |
| 150 | } |
| 151 | remove(tempQuit); |
| 152 | if ((fbuf = fopen(mbox, "r")) != NULL) { |
| 153 | while ((c = getc(fbuf)) != EOF) |
| 154 | putc(c, obuf); |
| 155 | fclose(fbuf); |
| 156 | } |
| 157 | if (ferror(obuf)) { |
| 158 | perror(tempQuit); |
| 159 | fclose(ibuf); |
| 160 | fclose(obuf); |
| 161 | unlock(); |
| 162 | return; |
| 163 | } |
| 164 | fclose(obuf); |
| 165 | close(creat(mbox, 0600)); |
| 166 | if ((obuf = fopen(mbox, "w")) == NULL) { |
| 167 | perror(mbox); |
| 168 | fclose(ibuf); |
| 169 | unlock(); |
| 170 | return; |
| 171 | } |
| 172 | } |
| 173 | if (value("append") != NOSTR) |
| 174 | if ((obuf = fopen(mbox, "a")) == NULL) { |
| 175 | perror(mbox); |
| 176 | unlock(); |
| 177 | return; |
| 178 | } |
| 179 | for (mp = &message[0]; mp < &message[msgCount]; mp++) |
| 180 | if ((mp->m_flag & (MDELETED|MSAVED|MPRESERVE)) == 0) |
| 181 | if (send(mp, obuf) < 0) { |
| 182 | perror(mbox); |
| 183 | fclose(ibuf); |
| 184 | fclose(obuf); |
| 185 | unlock(); |
| 186 | return; |
| 187 | } |
| 188 | |
| 189 | /* |
| 190 | * Copy the user's old mbox contents back |
| 191 | * to the end of the stuff we just saved. |
| 192 | * If we are appending, this is unnecessary. |
| 193 | */ |
| 194 | |
| 195 | if (value("append") == NOSTR) { |
| 196 | rewind(ibuf); |
| 197 | c = getc(ibuf); |
| 198 | while (c != EOF) { |
| 199 | putc(c, obuf); |
| 200 | if (ferror(obuf)) |
| 201 | break; |
| 202 | c = getc(ibuf); |
| 203 | } |
| 204 | fclose(ibuf); |
| 205 | fflush(obuf); |
| 206 | } |
| 207 | if (ferror(obuf)) { |
| 208 | perror(mbox); |
| 209 | fclose(obuf); |
| 210 | unlock(); |
| 211 | return; |
| 212 | } |
| 213 | fclose(obuf); |
| 214 | if (mcount == 1) |
| 215 | printf("Saved 1 message in mbox\n"); |
| 216 | else |
| 217 | printf("Saved %d messages in mbox\n", mcount); |
| 218 | |
| 219 | /* |
| 220 | * Now we are ready to copy back preserved files to |
| 221 | * the system mailbox, if any were requested. |
| 222 | */ |
| 223 | |
| 224 | if (p != 0) { |
| 225 | writeback(rbuf); |
| 226 | unlock(); |
| 227 | return; |
| 228 | } |
| 229 | |
| 230 | /* |
| 231 | * Finally, remove his /usr/mail file. |
| 232 | * If new mail has arrived, copy it back. |
| 233 | */ |
| 234 | |
| 235 | cream: |
| 236 | if (rbuf != NULL) { |
| 237 | fbuf = fopen(mailname, "w"); |
| 238 | if (fbuf == NULL) |
| 239 | goto newmail; |
| 240 | while ((c = getc(rbuf)) != EOF) |
| 241 | putc(c, fbuf); |
| 242 | fclose(rbuf); |
| 243 | fclose(fbuf); |
| 244 | alter(mailname); |
| 245 | unlock(); |
| 246 | return; |
| 247 | } |
| 248 | demail(); |
| 249 | unlock(); |
| 250 | return; |
| 251 | |
| 252 | newmail: |
| 253 | printf("Thou hast new mail.\n"); |
| 254 | unlock(); |
| 255 | } |
| 256 | |
| 257 | /* |
| 258 | * Preserve all the appropriate messages back in the system |
| 259 | * mailbox, and print a nice message indicated how many were |
| 260 | * saved. On any error, just return -1. Else return 0. |
| 261 | * Incorporate the any new mail that we found. |
| 262 | */ |
| 263 | |
| 264 | writeback(res) |
| 265 | register FILE *res; |
| 266 | { |
| 267 | register struct message *mp; |
| 268 | register int p, c; |
| 269 | FILE *obuf; |
| 270 | |
| 271 | p = 0; |
| 272 | if ((obuf = fopen(mailname, "w")) == NULL) { |
| 273 | perror(mailname); |
| 274 | return(-1); |
| 275 | } |
| 276 | #ifndef APPEND |
| 277 | if (res != NULL) |
| 278 | while ((c = getc(res)) != EOF) |
| 279 | putc(c, obuf); |
| 280 | #endif |
| 281 | for (mp = &message[0]; mp < &message[msgCount]; mp++) |
| 282 | if ((mp->m_flag&MPRESERVE)||(mp->m_flag&MTOUCH)==0) { |
| 283 | p++; |
| 284 | if (send(mp, obuf) < 0) { |
| 285 | perror(mailname); |
| 286 | fclose(obuf); |
| 287 | return(-1); |
| 288 | } |
| 289 | } |
| 290 | #ifdef APPEND |
| 291 | if (res != NULL) |
| 292 | while ((c = getc(res)) != EOF) |
| 293 | putc(c, obuf); |
| 294 | #endif |
| 295 | fflush(obuf); |
| 296 | if (ferror(obuf)) { |
| 297 | perror(mailname); |
| 298 | fclose(obuf); |
| 299 | return(-1); |
| 300 | } |
| 301 | if (res != NULL) |
| 302 | fclose(res); |
| 303 | fclose(obuf); |
| 304 | alter(mailname); |
| 305 | if (p == 1) |
| 306 | printf("Held 1 message in %s\n", mailname); |
| 307 | else |
| 308 | printf("Held %d messages in %s\n", p, mailname); |
| 309 | return(0); |
| 310 | } |