1 # include <errno.h> 2 # include "sendmail.h" 3 4 SCCSID(@(#)collect.c 4.3 03/11/84); 5 6 /* 7 ** COLLECT -- read & parse message header & make temp file. 8 ** 9 ** Creates a temporary file name and copies the standard 10 ** input to that file. Leading UNIX-style "From" lines are 11 ** stripped off (after important information is extracted). 12 ** 13 ** Parameters: 14 ** sayok -- if set, give an ARPANET style message 15 ** to say we are ready to collect input. 16 ** 17 ** Returns: 18 ** none. 19 ** 20 ** Side Effects: 21 ** Temp file is created and filled. 22 ** The from person may be set. 23 */ 24 25 collect(sayok) 26 bool sayok; 27 { 28 register FILE *tf; 29 char buf[MAXFIELD+2]; 30 register char *p; 31 extern char *hvalue(); 32 33 /* 34 ** Create the temp file name and create the file. 35 */ 36 37 CurEnv->e_df = newstr(queuename(CurEnv, 'd')); 38 if ((tf = dfopen(CurEnv->e_df, "w")) == NULL) 39 { 40 syserr("Cannot create %s", CurEnv->e_df); 41 NoReturn = TRUE; 42 finis(); 43 } 44 (void) chmod(CurEnv->e_df, FileMode); 45 46 /* 47 ** Tell ARPANET to go ahead. 48 */ 49 50 if (sayok) 51 message("354", "Enter mail, end with \".\" on a line by itself"); 52 53 /* 54 ** Try to read a UNIX-style From line 55 */ 56 57 (void) sfgets(buf, sizeof buf, InChannel); 58 fixcrlf(buf, FALSE); 59 # ifndef NOTUNIX 60 if (!SaveFrom && strncmp(buf, "From ", 5) == 0) 61 { 62 eatfrom(buf); 63 (void) sfgets(buf, sizeof buf, InChannel); 64 fixcrlf(buf, FALSE); 65 } 66 # endif NOTUNIX 67 68 /* 69 ** Copy InChannel to temp file & do message editing. 70 ** To keep certain mailers from getting confused, 71 ** and to keep the output clean, lines that look 72 ** like UNIX "From" lines are deleted in the header. 73 */ 74 75 do 76 { 77 int c; 78 extern bool isheader(); 79 80 /* if the line is too long, throw the rest away */ 81 if (index(buf, '\n') == NULL) 82 { 83 while ((c = getc(InChannel)) != '\n' && c != EOF) 84 continue; 85 /* give an error? */ 86 } 87 88 fixcrlf(buf, TRUE); 89 90 /* see if the header is over */ 91 if (!isheader(buf)) 92 break; 93 94 /* get the rest of this field */ 95 while ((c = getc(InChannel)) == ' ' || c == '\t') 96 { 97 p = &buf[strlen(buf)]; 98 *p++ = '\n'; 99 *p++ = c; 100 if (sfgets(p, MAXFIELD - (p - buf), InChannel) == NULL) 101 break; 102 fixcrlf(p, TRUE); 103 } 104 if (!feof(InChannel)) 105 (void) ungetc(c, InChannel); 106 107 CurEnv->e_msgsize += strlen(buf); 108 109 /* 110 ** Snarf header away. 111 */ 112 113 if (bitset(H_EOH, chompheader(buf, FALSE))) 114 break; 115 } while (sfgets(buf, MAXFIELD, InChannel) != NULL); 116 117 # ifdef DEBUG 118 if (tTd(30, 1)) 119 printf("EOH\n"); 120 # endif DEBUG 121 122 /* throw away a blank line */ 123 if (buf[0] == '\0') 124 (void) sfgets(buf, MAXFIELD, InChannel); 125 126 /* 127 ** Collect the body of the message. 128 */ 129 130 do 131 { 132 register char *bp = buf; 133 134 fixcrlf(buf, TRUE); 135 136 /* check for end-of-message */ 137 if (!IgnrDot && buf[0] == '.' && (buf[1] == '\n' || buf[1] == '\0')) 138 break; 139 140 /* check for transparent dot */ 141 if (OpMode == MD_SMTP && !IgnrDot && bp[0] == '.' && bp[1] == '.') 142 bp++; 143 144 /* 145 ** Figure message length, output the line to the temp 146 ** file, and insert a newline if missing. 147 */ 148 149 CurEnv->e_msgsize += strlen(bp) + 1; 150 fputs(bp, tf); 151 fputs("\n", tf); 152 if (ferror(tf)) 153 tferror(tf); 154 } while (sfgets(buf, MAXFIELD, InChannel) != NULL); 155 if (fflush(tf) != 0) 156 tferror(tf); 157 (void) fclose(tf); 158 159 /* An EOF when running SMTP is an error */ 160 if (feof(InChannel) && OpMode == MD_SMTP) 161 { 162 syserr("collect: unexpected close, from=%s", CurEnv->e_from.q_paddr); 163 164 /* don't return an error indication */ 165 CurEnv->e_to = NULL; 166 CurEnv->e_flags &= ~EF_FATALERRS; 167 168 /* and don't try to deliver the partial message either */ 169 finis(); 170 } 171 172 /* 173 ** Find out some information from the headers. 174 ** Examples are who is the from person & the date. 175 */ 176 177 eatheader(CurEnv); 178 179 /* 180 ** Add an Apparently-To: line if we have no recipient lines. 181 */ 182 183 if (hvalue("to") == NULL && hvalue("cc") == NULL && 184 hvalue("bcc") == NULL && hvalue("apparently-to") == NULL) 185 { 186 register ADDRESS *q; 187 188 /* create an Apparently-To: field */ 189 /* that or reject the message.... */ 190 for (q = CurEnv->e_sendqueue; q != NULL; q = q->q_next) 191 { 192 if (q->q_alias != NULL) 193 continue; 194 # ifdef DEBUG 195 if (tTd(30, 3)) 196 printf("Adding Apparently-To: %s\n", q->q_paddr); 197 # endif DEBUG 198 addheader("apparently-to", q->q_paddr, CurEnv); 199 } 200 } 201 202 if ((CurEnv->e_dfp = fopen(CurEnv->e_df, "r")) == NULL) 203 syserr("Cannot reopen %s", CurEnv->e_df); 204 } 205 /* 206 ** TFERROR -- signal error on writing the temporary file. 207 ** 208 ** Parameters: 209 ** tf -- the file pointer for the temporary file. 210 ** 211 ** Returns: 212 ** none. 213 ** 214 ** Side Effects: 215 ** Gives an error message. 216 ** Arranges for following output to go elsewhere. 217 */ 218 219 tferror(tf) 220 FILE *tf; 221 { 222 if (errno == ENOSPC) 223 { 224 (void) freopen(CurEnv->e_df, "w", tf); 225 fputs("\nMAIL DELETED BECAUSE OF LACK OF DISK SPACE\n\n", tf); 226 usrerr("452 Out of disk space for temp file"); 227 } 228 else 229 syserr("collect: Cannot write %s", CurEnv->e_df); 230 (void) freopen("/dev/null", "w", tf); 231 } 232 /* 233 ** EATFROM -- chew up a UNIX style from line and process 234 ** 235 ** This does indeed make some assumptions about the format 236 ** of UNIX messages. 237 ** 238 ** Parameters: 239 ** fm -- the from line. 240 ** 241 ** Returns: 242 ** none. 243 ** 244 ** Side Effects: 245 ** extracts what information it can from the header, 246 ** such as the date. 247 */ 248 249 # ifndef NOTUNIX 250 251 char *DowList[] = 252 { 253 "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat", NULL 254 }; 255 256 char *MonthList[] = 257 { 258 "Jan", "Feb", "Mar", "Apr", "May", "Jun", 259 "Jul", "Aug", "Sep", "Oct", "Nov", "Dec", 260 NULL 261 }; 262 263 eatfrom(fm) 264 char *fm; 265 { 266 register char *p; 267 register char **dt; 268 269 # ifdef DEBUG 270 if (tTd(30, 2)) 271 printf("eatfrom(%s)\n", fm); 272 # endif DEBUG 273 274 /* find the date part */ 275 p = fm; 276 while (*p != '\0') 277 { 278 /* skip a word */ 279 while (*p != '\0' && *p != ' ') 280 *p++; 281 while (*p == ' ') 282 *p++; 283 if (!isupper(*p) || p[3] != ' ' || p[13] != ':' || p[16] != ':') 284 continue; 285 286 /* we have a possible date */ 287 for (dt = DowList; *dt != NULL; dt++) 288 if (strncmp(*dt, p, 3) == 0) 289 break; 290 if (*dt == NULL) 291 continue; 292 293 for (dt = MonthList; *dt != NULL; dt++) 294 if (strncmp(*dt, &p[4], 3) == 0) 295 break; 296 if (*dt != NULL) 297 break; 298 } 299 300 if (*p != NULL) 301 { 302 char *q; 303 extern char *arpadate(); 304 305 /* we have found a date */ 306 q = xalloc(25); 307 strncpy(q, p, 25); 308 q[24] = '\0'; 309 define('d', q, CurEnv); 310 q = arpadate(q); 311 define('a', newstr(q), CurEnv); 312 } 313 } 314 315 # endif NOTUNIX 316