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Diffstat (limited to 'contrib/sendmail/rmail/rmail.c')
| -rw-r--r-- | contrib/sendmail/rmail/rmail.c | 430 |
1 files changed, 430 insertions, 0 deletions
diff --git a/contrib/sendmail/rmail/rmail.c b/contrib/sendmail/rmail/rmail.c new file mode 100644 index 000000000000..9d58fcc526b2 --- /dev/null +++ b/contrib/sendmail/rmail/rmail.c @@ -0,0 +1,430 @@ +/* + * Copyright (c) 1998 Sendmail, Inc. All rights reserved. + * Copyright (c) 1988, 1993 + * The Regents of the University of California. All rights reserved. + * + * By using this file, you agree to the terms and conditions set + * forth in the LICENSE file which can be found at the top level of + * the sendmail distribution. + * + */ + +#ifndef lint +static char copyright[] = +"@(#) Copyright (c) 1988, 1993\n\ + The Regents of the University of California. All rights reserved.\n"; +#endif /* not lint */ + +#ifndef lint +static char sccsid[] = "@(#)rmail.c 8.17 (Berkeley) 5/19/98"; +#endif /* not lint */ + +/* + * RMAIL -- UUCP mail server. + * + * This program reads the >From ... remote from ... lines that UUCP is so + * fond of and turns them into something reasonable. It then execs sendmail + * with various options built from these lines. + * + * The expected syntax is: + * + * <user> := [-a-z0-9]+ + * <date> := ctime format + * <site> := [-a-z0-9!]+ + * <blank line> := "^\n$" + * <from> := "From" <space> <user> <space> <date> + * [<space> "remote from" <space> <site>] + * <forward> := ">" <from> + * msg := <from> <forward>* <blank-line> <body> + * + * The output of rmail(8) compresses the <forward> lines into a single + * from path. + * + * The err(3) routine is included here deliberately to make this code + * a bit more portable. + */ +#include <sys/param.h> +#include <sys/stat.h> +#include <sys/wait.h> + +#include <ctype.h> +#include <fcntl.h> +#ifdef BSD4_4 +# define FORK vfork +# include <paths.h> +#else +# define FORK fork +# ifndef _PATH_SENDMAIL +# define _PATH_SENDMAIL "/usr/lib/sendmail" +# endif +#endif +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> +#ifdef EX_OK +# undef EX_OK /* unistd.h may have another use for this */ +#endif +#include <sysexits.h> + +#ifndef MAX +# define MAX(a, b) ((a) < (b) ? (b) : (a)) +#endif + +#ifndef __P +# ifdef __STDC__ +# define __P(protos) protos +# else +# define __P(protos) () +# define const +# endif +#endif + +#if defined(BSD4_4) || defined(linux) || SOLARIS >= 20600 || (SOLARIS < 10000 && SOLARIS >= 206) +# define HASSNPRINTF 1 +#endif + +#if defined(IRIX64) || defined(IRIX5) || defined(IRIX6) || \ + defined(BSD4_4) || defined(__osf__) || defined(__GNU_LIBRARY__) +# ifndef HASSTRERROR +# define HASSTRERROR 1 /* has strerror(3) */ +# endif +#endif + +#if !HASSTRERROR +extern char *strerror __P((int)); +#endif + +#if defined(sun) && !defined(BSD) && !defined(SOLARIS) && !defined(__svr4__) && !defined(__SVR4) +# define memmove(d, s, l) (bcopy((s), (d), (l))) +#endif + +#if !HASSNPRINTF +extern int snprintf __P((char *, size_t, const char *, ...)); +#endif /* !HASSNPRINTF */ + +u_char tTdvect[100]; + +void err __P((int, const char *, ...)); +void usage __P((void)); +char *xalloc __P((int)); + +#define newstr(s) strcpy(xalloc(strlen(s) + 1), s) + +char * +xalloc(sz) + register int sz; +{ + register char *p; + + /* some systems can't handle size zero mallocs */ + if (sz <= 0) + sz = 1; + + p = malloc((unsigned) sz); + if (p == NULL) + err(EX_TEMPFAIL, "out of memory"); + return (p); +} + +int +main(argc, argv) + int argc; + char *argv[]; +{ + extern char *optarg; + extern int errno, optind; + FILE *fp; + struct stat sb; + size_t fplen, fptlen, len; + off_t offset; + int ch, debug, i, pdes[2], pid, status; + char *addrp, *domain, *p, *t; + char *from_path, *from_sys, *from_user; + char *args[100], buf[2048], lbuf[2048]; + + debug = 0; + domain = "UUCP"; /* Default "domain". */ + while ((ch = getopt(argc, argv, "D:T")) != EOF) + switch (ch) { + case 'T': + debug = 1; + break; + case 'D': + domain = optarg; + break; + case '?': + default: + usage(); + } + argc -= optind; + argv += optind; + + if (argc < 1) + usage(); + + from_path = from_sys = from_user = NULL; + for (offset = 0;;) { + + /* Get and nul-terminate the line. */ + if (fgets(lbuf, sizeof(lbuf), stdin) == NULL) + exit (EX_DATAERR); + if ((p = strchr(lbuf, '\n')) == NULL) + err(EX_DATAERR, "line too long"); + *p = '\0'; + + /* Parse lines until reach a non-"From" line. */ + if (!strncmp(lbuf, "From ", 5)) + addrp = lbuf + 5; + else if (!strncmp(lbuf, ">From ", 6)) + addrp = lbuf + 6; + else if (offset == 0) + err(EX_DATAERR, + "missing or empty From line: %s", lbuf); + else { + *p = '\n'; + break; + } + + if (*addrp == '\0') + err(EX_DATAERR, "corrupted From line: %s", lbuf); + + /* Use the "remote from" if it exists. */ + for (p = addrp; (p = strchr(p + 1, 'r')) != NULL;) + if (!strncmp(p, "remote from ", 12)) { + for (t = p += 12; + *t && !(isascii(*t) && isspace(*t)); ++t); + *t = '\0'; + if (debug) + (void)fprintf(stderr, + "remote from: %s\n", p); + break; + } + + /* Else use the string up to the last bang. */ + if (p == NULL) { + if (*addrp == '!') + err(EX_DATAERR, + "bang starts address: %s", addrp); + else if ((t = strrchr(addrp, '!')) != NULL) { + *t = '\0'; + p = addrp; + addrp = t + 1; + if (*addrp == '\0') + err(EX_DATAERR, + "corrupted From line: %s", lbuf); + if (debug) + (void)fprintf(stderr, "bang: %s\n", p); + } + } + /* 'p' now points to any system string from this line. */ + if (p != NULL) { + /* Nul terminate it as necessary. */ + for (t = p; *t && !(isascii(*t) && isspace(*t)); ++t); + *t = '\0'; + + /* If the first system, copy to the from_sys string. */ + if (from_sys == NULL) { + from_sys = newstr(p); + if (debug) + (void)fprintf(stderr, + "from_sys: %s\n", from_sys); + } + + /* Concatenate to the path string. */ + len = t - p; + if (from_path == NULL) { + fplen = 0; + if ((from_path = malloc(fptlen = 256)) == NULL) + err(EX_TEMPFAIL, NULL); + } + if (fplen + len + 2 > fptlen) { + fptlen += MAX(fplen + len + 2, 256); + if ((from_path = + realloc(from_path, fptlen)) == NULL) + err(EX_TEMPFAIL, NULL); + } + memmove(from_path + fplen, p, len); + fplen += len; + from_path[fplen++] = '!'; + from_path[fplen] = '\0'; + } + + /* Save off from user's address; the last one wins. */ + for (p = addrp; *p && !(isascii(*p) && isspace(*p)); ++p); + *p = '\0'; + if (*addrp == '\0') + addrp = "<>"; + if (from_user != NULL) + free(from_user); + from_user = newstr(addrp); + + if (debug) { + if (from_path != NULL) + (void)fprintf(stderr, + "from_path: %s\n", from_path); + (void)fprintf(stderr, "from_user: %s\n", from_user); + } + + if (offset != -1) + offset = (off_t)ftell(stdin); + } + + i = 0; + args[i++] = _PATH_SENDMAIL; /* Build sendmail's argument list. */ + args[i++] = "-oee"; /* No errors, just status. */ + args[i++] = "-odq"; /* Queue it, don't try to deliver. */ + args[i++] = "-oi"; /* Ignore '.' on a line by itself. */ + + /* set from system and protocol used */ + if (from_sys == NULL) + (void)snprintf(buf, sizeof(buf), "-p%s", domain); + else if (strchr(from_sys, '.') == NULL) + (void)snprintf(buf, sizeof(buf), "-p%s:%s.%s", + domain, from_sys, domain); + else + (void)snprintf(buf, sizeof(buf), "-p%s:%s", domain, from_sys); + args[i++] = newstr(buf); + + /* Set name of ``from'' person. */ + (void)snprintf(buf, sizeof(buf), "-f%s%s", + from_path ? from_path : "", from_user); + args[i++] = newstr(buf); + + /* + * Don't copy arguments beginning with - as they will be + * passed to sendmail and could be interpreted as flags. + * To prevent confusion of sendmail wrap < and > around + * the address (helps to pass addrs like @gw1,@gw2:aa@bb) + */ + while (*argv) { + if (**argv == '-') + err(EX_USAGE, "dash precedes argument: %s", *argv); + if (strchr(*argv, ',') == NULL || strchr(*argv, '<') != NULL) + args[i++] = *argv; + else { + if ((args[i] = malloc(strlen(*argv) + 3)) == NULL) + err(EX_TEMPFAIL, "Cannot malloc"); + sprintf (args [i++], "<%s>", *argv); + } + argv++; + } + args[i] = 0; + + if (debug) { + (void)fprintf(stderr, "Sendmail arguments:\n"); + for (i = 0; args[i]; i++) + (void)fprintf(stderr, "\t%s\n", args[i]); + } + + /* + * If called with a regular file as standard input, seek to the right + * position in the file and just exec sendmail. Could probably skip + * skip the stat, but it's not unreasonable to believe that a failed + * seek will cause future reads to fail. + */ + if (!fstat(STDIN_FILENO, &sb) && S_ISREG(sb.st_mode)) { + if (lseek(STDIN_FILENO, offset, SEEK_SET) != offset) + err(EX_TEMPFAIL, "stdin seek"); + execv(_PATH_SENDMAIL, args); + err(EX_OSERR, "%s", _PATH_SENDMAIL); + } + + if (pipe(pdes) < 0) + err(EX_OSERR, NULL); + + switch (pid = FORK()) { + case -1: /* Err. */ + err(EX_OSERR, NULL); + case 0: /* Child. */ + if (pdes[0] != STDIN_FILENO) { + (void)dup2(pdes[0], STDIN_FILENO); + (void)close(pdes[0]); + } + (void)close(pdes[1]); + execv(_PATH_SENDMAIL, args); + _exit(127); + /* NOTREACHED */ + } + + if ((fp = fdopen(pdes[1], "w")) == NULL) + err(EX_OSERR, NULL); + (void)close(pdes[0]); + + /* Copy the file down the pipe. */ + do { + (void)fprintf(fp, "%s", lbuf); + } while (fgets(lbuf, sizeof(lbuf), stdin) != NULL); + + if (ferror(stdin)) + err(EX_TEMPFAIL, "stdin: %s", strerror(errno)); + + if (fclose(fp)) + err(EX_OSERR, NULL); + + if ((waitpid(pid, &status, 0)) == -1) + err(EX_OSERR, "%s", _PATH_SENDMAIL); + + if (!WIFEXITED(status)) + err(EX_OSERR, + "%s: did not terminate normally", _PATH_SENDMAIL); + + if (WEXITSTATUS(status)) + err(status, "%s: terminated with %d (non-zero) status", + _PATH_SENDMAIL, WEXITSTATUS(status)); + exit(EX_OK); +} + +void +usage() +{ + (void)fprintf(stderr, "usage: rmail [-T] [-D domain] user ...\n"); + exit(EX_USAGE); +} + +#ifdef __STDC__ +#include <stdarg.h> +#else +#include <varargs.h> +#endif + +void +#ifdef __STDC__ +err(int eval, const char *fmt, ...) +#else +err(eval, fmt, va_alist) + int eval; + const char *fmt; + va_dcl +#endif +{ + va_list ap; +#if __STDC__ + va_start(ap, fmt); +#else + va_start(ap); +#endif + (void)fprintf(stderr, "rmail: "); + (void)vfprintf(stderr, fmt, ap); + va_end(ap); + (void)fprintf(stderr, "\n"); + exit(eval); +} + +#if !HASSTRERROR + +char * +strerror(eno) + int eno; +{ + extern int sys_nerr; + extern char *sys_errlist[]; + static char ebuf[60]; + + if (eno >= 0 && eno < sys_nerr) + return sys_errlist[eno]; + (void) sprintf(ebuf, "Error %d", eno); + return ebuf; +} + +#endif /* !HASSTRERROR */ |