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/* $OpenBSD: main.c,v 1.23 2009/10/27 23:59:40 deraadt Exp $ */
/* $NetBSD: main.c,v 1.7 1997/05/13 06:15:57 mikel Exp $ */
/*
* Copyright (c) 1980, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include "rcv.h"
#include <fcntl.h>
#include <sys/ioctl.h>
#include "extern.h"
static void usage(void);
int main(int, char **);
/*
* Mail -- a mail program
*
* Startup -- interface with user.
*/
int
main(int argc, char **argv)
{
int i;
struct name *to, *cc, *bcc, *smopts;
char *subject;
char *replyto;
char *header;
char *ef;
char* cmd;
char nosrc = 0;
char *rc;
extern const char version[];
/*
* drop any sgid/suid privileges
*/
if (setgid (getgid()) < 0) {
err(1, "setgid");
}
if (setuid (getuid()) < 0) {
err(1, "setuid");
}
/*
* Set up a reasonable environment.
* Figure out whether we are being run interactively,
* start the SIGCHLD catcher, and so forth.
*/
(void)signal(SIGCHLD, sigchild);
(void)signal(SIGPIPE, SIG_IGN);
if (isatty(0))
assign("interactive", "");
/*
* Grab some stuff from the environment we might use
*/
if ((cmd = getenv("PAGER")))
assign("PAGER", cmd);
if ((cmd = getenv("LISTER")))
assign("LISTER", cmd);
if ((cmd = getenv("SHELL")))
assign("SHELL", cmd);
if ((cmd = getenv("EDITOR")))
assign("EDITOR", cmd);
if ((cmd = getenv("VISUAL")))
assign("VISUAL", cmd);
if ((cmd = getenv("MBOX")))
assign("MBOX", cmd);
if ((cmd = getenv("DEAD")))
assign("DEAD", cmd);
if ((cmd = getenv("REPLYTO")))
assign("REPLYTO", cmd);
image = -1;
/*
* Now, determine how we are being used.
* We successively pick off - flags.
* If there is anything left, it is the base of the list
* of users to mail to. Argp will be set to point to the
* first of these users.
*/
ef = NULL;
to = NULL;
cc = NULL;
bcc = NULL;
smopts = NULL;
subject = NULL;
header = NULL;
replyto = NULL;
while ((i = getopt(argc, argv, "EIN:a:b:c:defins:u:v")) != -1) {
switch (i) {
case 'u':
/*
* Next argument is person to pretend to be.
*/
#ifndef DEBIAN
if (strlen(optarg) >= MAXLOGNAME)
errx(1, "username `%s' too long", optarg);
#endif
unsetenv("MAIL");
myname = optarg;
uflag = 1;
break;
case 'i':
/*
* User wants to ignore interrupts.
* Set the variable "ignore"
*/
assign("ignore", "");
break;
case 'd':
debug++;
break;
#define REMOVE_NEWLINES(arg) { char *t; \
for (t = (arg); *t; t++) \
if (*t == '\n' || *t == '\r') *t = ' '; \
}
case 's':
/*
* Give a subject field for sending from
* non terminal
*/
REMOVE_NEWLINES(optarg);
subject = optarg;
break;
case 'a':
/*
* Give additional header fields for sending from
* non terminal
*/
REMOVE_NEWLINES(optarg);
if (header == NULL) {
if ((header = (char *)malloc(strlen(optarg)+1)) != NULL)
strcpy(header, optarg);
} else {
if ((header = (char *)realloc(header, strlen(optarg)+strlen(header)+2)) != NULL) {
strcat(header, "\n");
strcat(header, optarg);
}
}
break;
case 'f':
/*
* User is specifying file to "edit" with Mail,
* as opposed to reading system mailbox.
* We read his mbox file unless another file
* is specified after the arguments.
*/
ef = "&";
break;
case 'n':
/*
* User doesn't want to source /usr/lib/Mail.rc
*/
nosrc++;
break;
case 'N':
/*
* Avoid initial header printing.
*/
assign("noheader", "");
break;
case 'v':
/*
* Send mailer verbose flag
*/
assign("verbose", "");
break;
case 'I':
/*
* We're interactive
*/
assign("interactive", "");
break;
case 'c':
/*
* Get Carbon Copy Recipient list
*/
cc = cat(cc, nalloc(optarg, GCC));
break;
case 'b':
/*
* Get Blind Carbon Copy Recipient list
*/
bcc = cat(bcc, nalloc(optarg, GBCC));
break;
case 'e':
case 'E':
/*
* Don't send messages with an empty body.
*/
assign("skipempty", "");
break;
default:
usage();
/*NOTREACHED*/
}
}
if (ef != NULL) {
/* Check for optional mailbox file name. */
if (optind < argc) {
ef = argv[optind++];
if (optind < argc)
errx(1, "Cannot give -f and people to send to");
}
} else {
for (i = optind; argv[i]; i++)
to = cat(to, nalloc(argv[i], GTO));
}
/*
* Check for inconsistent arguments.
*/
if (to == NULL && (subject != NULL || cc != NULL || bcc != NULL))
errx(1, "You must specify direct recipients with -s, -c, or -b");
/*
* Block SIGINT except where we install an explicit handler for it.
*/
sigemptyset(&intset);
sigaddset(&intset, SIGINT);
(void)sigprocmask(SIG_BLOCK, &intset, NULL);
/*
* Initialization.
*/
tinit();
setscreensize();
input = stdin;
rcvmode = !to;
spreserve();
if (!nosrc)
load(_PATH_MASTER_RC);
replyto = value("REPLYTO");
/*
* Expand returns a savestr, but load only uses the file name
* for fopen, so it's safe to do this.
*/
if ((rc = getenv("MAILRC")) == 0)
rc = "~/.mailrc";
load(expand(rc));
if (!rcvmode) {
mail(to, cc, bcc, smopts, subject, header, replyto);
/*
* why wait?
*/
exit(senderr);
}
/*
* Ok, we are reading mail.
* Decide whether we are editing a mailbox or reading
* the system mailbox, and open up the right stuff.
*/
if (ef == NULL)
ef = "%";
if (setfile(ef) < 0)
exit(1); /* error already reported */
if (value("quiet") == NULL)
(void)printf("Mail version %s. Type ? for help.\n",
version);
announce();
(void)fflush(stdout);
commands();
(void)ignoresig(SIGHUP, NULL, NULL);
(void)ignoresig(SIGINT, NULL, NULL);
(void)ignoresig(SIGQUIT, NULL, NULL);
quit();
exit(0);
}
/*
* Compute what the screen size for printing headers should be.
* We use the following algorithm for the height:
* If baud rate < 1200, use 9
* If baud rate = 1200, use 14
* If baud rate > 1200, use 24 or ws_row
* Width is either 80 or ws_col;
*/
void
setscreensize(void)
{
struct termios tbuf;
struct winsize ws;
speed_t ospeed;
if (ioctl(1, TIOCGWINSZ, (char *) &ws) < 0)
ws.ws_col = ws.ws_row = 0;
if (tcgetattr(1, &tbuf) < 0)
ospeed = B9600;
else
ospeed = cfgetospeed(&tbuf);
if (ospeed < B1200)
screenheight = 9;
else if (ospeed == B1200)
screenheight = 14;
else if (ws.ws_row != 0)
screenheight = ws.ws_row;
else
screenheight = 24;
if ((realscreenheight = ws.ws_row) == 0)
realscreenheight = 24;
if ((screenwidth = ws.ws_col) == 0)
screenwidth = 80;
}
static void
usage(void)
{
fprintf(stderr, "usage: %s [-dEIinv] [-a header] [-b bcc-addr] [-c cc-addr] "
"[-s subject] to-addr ...\n", __progname);
fprintf(stderr, " %s [-dEIiNnv] -f [name]\n", __progname);
fprintf(stderr, " %s [-dEIiNnv] [-u user]\n", __progname);
exit(1);
}
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