| 1 | /* |
| 2 | * Copyright (c) 1981, 1988 The Regents of the University of California. |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that the following conditions |
| 7 | * are met: |
| 8 | * 1. Redistributions of source code must retain the above copyright |
| 9 | * notice, this list of conditions and the following disclaimer. |
| 10 | * 2. Redistributions in binary form must reproduce the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer in the |
| 12 | * documentation and/or other materials provided with the distribution. |
| 13 | * 3. All advertising materials mentioning features or use of this software |
| 14 | * must display the following acknowledgement: |
| 15 | * This product includes software developed by the University of |
| 16 | * California, Berkeley and its contributors. |
| 17 | * 4. Neither the name of the University nor the names of its contributors |
| 18 | * may be used to endorse or promote products derived from this software |
| 19 | * without specific prior written permission. |
| 20 | * |
| 21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 31 | * SUCH DAMAGE. |
| 32 | */ |
| 33 | |
| 34 | #ifndef lint |
| 35 | char copyright[] = |
| 36 | "@(#) Copyright (c) 1981, 1988 The Regents of the University of California.\n\ |
| 37 | All rights reserved.\n"; |
| 38 | #endif /* not lint */ |
| 39 | |
| 40 | #ifndef lint |
| 41 | static char sccsid[] = "@(#)rmail.c 4.15 (Berkeley) 5/31/90"; |
| 42 | #endif /* not lint */ |
| 43 | |
| 44 | /* |
| 45 | * RMAIL -- UUCP mail server. |
| 46 | * |
| 47 | * This program reads the >From ... remote from ... lines that |
| 48 | * UUCP is so fond of and turns them into something reasonable. |
| 49 | * It calls sendmail giving it a -f option built from these lines. |
| 50 | */ |
| 51 | |
| 52 | #include <sysexits.h> |
| 53 | #include <sys/types.h> |
| 54 | #include <sys/file.h> |
| 55 | #include <sys/stat.h> |
| 56 | #include <stdio.h> |
| 57 | #include <paths.h> |
| 58 | |
| 59 | typedef char bool; |
| 60 | #define TRUE 1 |
| 61 | #define FALSE 0 |
| 62 | |
| 63 | extern char *index(); |
| 64 | extern char *rindex(); |
| 65 | |
| 66 | char *Domain = "UUCP"; /* Default "Domain" */ |
| 67 | |
| 68 | main(argc, argv) |
| 69 | int argc; |
| 70 | char **argv; |
| 71 | { |
| 72 | char lbuf[1024]; /* one line of the message */ |
| 73 | char from[512]; /* accumulated path of sender */ |
| 74 | char ufrom[512]; /* user on remote system */ |
| 75 | char sys[512]; /* a system in path */ |
| 76 | char fsys[512]; /* first system in path */ |
| 77 | char junk[1024]; /* scratchpad */ |
| 78 | char *args[100]; /* arguments to mailer command */ |
| 79 | register char *cp; |
| 80 | register char *uf = NULL; /* ptr into ufrom */ |
| 81 | int i; |
| 82 | long position; |
| 83 | struct stat sbuf; |
| 84 | #ifdef DEBUG |
| 85 | bool Debug; |
| 86 | |
| 87 | if (argc > 1 && strcmp(argv[1], "-T") == 0) { |
| 88 | Debug = TRUE; |
| 89 | argc--; |
| 90 | argv++; |
| 91 | } |
| 92 | #endif |
| 93 | |
| 94 | if (argc < 2) { |
| 95 | fprintf(stderr, "Usage: rmail user ...\n"); |
| 96 | exit(EX_USAGE); |
| 97 | } |
| 98 | if (argc > 2 && strncmp(argv[1], "-D", 2) == 0) { |
| 99 | Domain = &argv[1][2]; |
| 100 | argc -= 2; |
| 101 | argv += 2; |
| 102 | } |
| 103 | from[0] = '\0'; |
| 104 | fsys[0] = '\0'; |
| 105 | (void) strcpy(ufrom, _PATH_DEVNULL); |
| 106 | |
| 107 | for (position = 0;; position = ftell(stdin)) { |
| 108 | if (fgets(lbuf, sizeof lbuf, stdin) == NULL) |
| 109 | exit(EX_DATAERR); |
| 110 | if (strncmp(lbuf, "From ", 5) != 0 && |
| 111 | strncmp(lbuf, ">From ", 6) != 0) |
| 112 | break; |
| 113 | (void) sscanf(lbuf, "%s %s", junk, ufrom); |
| 114 | cp = lbuf; |
| 115 | uf = ufrom; |
| 116 | for (;;) { |
| 117 | cp = index(cp + 1, 'r'); |
| 118 | if (cp == NULL) { |
| 119 | register char *p = rindex(uf, '!'); |
| 120 | |
| 121 | if (p != NULL) { |
| 122 | *p = '\0'; |
| 123 | (void) strcpy(sys, uf); |
| 124 | uf = p + 1; |
| 125 | break; |
| 126 | } |
| 127 | (void) strcpy(sys, ""); |
| 128 | break; /* no "remote from" found */ |
| 129 | } |
| 130 | #ifdef DEBUG |
| 131 | if (Debug) |
| 132 | printf("cp='%s'\n", cp); |
| 133 | #endif |
| 134 | if (strncmp(cp, "remote from ", 12) == 0) |
| 135 | break; |
| 136 | } |
| 137 | if (cp != NULL) |
| 138 | (void) sscanf(cp, "remote from %s", sys); |
| 139 | if (fsys[0] == '\0') |
| 140 | (void) strcpy(fsys, sys); |
| 141 | if (sys[0]) { |
| 142 | (void) strcat(from, sys); |
| 143 | (void) strcat(from, "!"); |
| 144 | } |
| 145 | #ifdef DEBUG |
| 146 | if (Debug) |
| 147 | printf("ufrom='%s', sys='%s', from now '%s'\n", uf, sys, from); |
| 148 | #endif |
| 149 | } |
| 150 | if (uf == NULL) { /* No From line was provided */ |
| 151 | fprintf(stderr, "No From line in rmail\n"); |
| 152 | exit(EX_DATAERR); |
| 153 | } |
| 154 | (void) strcat(from, uf); |
| 155 | (void) fstat(0, &sbuf); |
| 156 | (void) lseek(0, position, L_SET); |
| 157 | |
| 158 | /* |
| 159 | * Now we rebuild the argument list and chain to sendmail. Note that |
| 160 | * the above lseek might fail on irregular files, but we check for |
| 161 | * that case below. |
| 162 | */ |
| 163 | i = 0; |
| 164 | args[i++] = _PATH_SENDMAIL; |
| 165 | args[i++] = "-oee"; /* no errors, just status */ |
| 166 | args[i++] = "-odq"; /* queue it, don't try to deliver */ |
| 167 | args[i++] = "-oi"; /* ignore '.' on a line by itself */ |
| 168 | if (fsys[0] != '\0') { /* set sender's host name */ |
| 169 | static char junk2[512]; |
| 170 | |
| 171 | if (index(fsys, '.') == NULL) { |
| 172 | (void) strcat(fsys, "."); |
| 173 | (void) strcat(fsys, Domain); |
| 174 | } |
| 175 | (void) sprintf(junk2, "-oMs%s", fsys); |
| 176 | args[i++] = junk2; |
| 177 | } |
| 178 | /* set protocol used */ |
| 179 | (void) sprintf(junk, "-oMr%s", Domain); |
| 180 | args[i++] = junk; |
| 181 | if (from[0] != '\0') { /* set name of ``from'' person */ |
| 182 | static char junk2[512]; |
| 183 | |
| 184 | (void) sprintf(junk2, "-f%s", from); |
| 185 | args[i++] = junk2; |
| 186 | } |
| 187 | for (; *++argv != NULL; i++) { |
| 188 | /* |
| 189 | * don't copy arguments beginning with - as they will |
| 190 | * be passed to sendmail and could be interpreted as flags |
| 191 | * should be fixed in sendmail by using getopt(3), and |
| 192 | * just passing "--" before regular args. |
| 193 | */ |
| 194 | if (**argv != '-') |
| 195 | args[i] = *argv; |
| 196 | } |
| 197 | args[i] = NULL; |
| 198 | #ifdef DEBUG |
| 199 | if (Debug) { |
| 200 | printf("Command:"); |
| 201 | for (i = 0; args[i]; i++) |
| 202 | printf(" %s", args[i]); |
| 203 | printf("\n"); |
| 204 | } |
| 205 | #endif |
| 206 | if ((sbuf.st_mode & S_IFMT) != S_IFREG) { |
| 207 | /* |
| 208 | * If we were not called with standard input on a regular |
| 209 | * file, then we have to fork another process to send the |
| 210 | * first line down the pipe. |
| 211 | */ |
| 212 | int pipefd[2]; |
| 213 | #ifdef DEBUG |
| 214 | if (Debug) |
| 215 | printf("Not a regular file!\n"); |
| 216 | #endif |
| 217 | if (pipe(pipefd) < 0) |
| 218 | exit(EX_OSERR); |
| 219 | if (fork() == 0) { |
| 220 | /* |
| 221 | * Child: send the message down the pipe. |
| 222 | */ |
| 223 | FILE *out; |
| 224 | |
| 225 | out = fdopen(pipefd[1], "w"); |
| 226 | close(pipefd[0]); |
| 227 | fputs(lbuf, out); |
| 228 | while (fgets(lbuf, sizeof lbuf, stdin)) |
| 229 | fputs(lbuf, out); |
| 230 | (void) fclose(out); |
| 231 | exit(EX_OK); |
| 232 | } |
| 233 | /* |
| 234 | * Parent: call sendmail with pipe as standard input |
| 235 | */ |
| 236 | close(pipefd[1]); |
| 237 | dup2(pipefd[0], 0); |
| 238 | } |
| 239 | execv(_PATH_SENDMAIL, args); |
| 240 | fprintf(stderr, "Exec of %s failed!\n", _PATH_SENDMAIL); |
| 241 | exit(EX_OSERR); |
| 242 | } |