This is newmail.c in view mode; [Download] [Up]
static char rcsid[] = "@(#)$Id: newmail.c,v 5.7 1992/12/11 01:45:04 syd Exp $";
/*******************************************************************************
* The Elm Mail System - $Revision: 5.7 $ $State: Exp $
*
* Copyright (c) 1988-1992 USENET Community Trust
* Copyright (c) 1986,1987 Dave Taylor
*******************************************************************************
* Bug reports, patches, comments, suggestions should be sent to:
*
* Syd Weinstein, Elm Coordinator
* elm@DSI.COM dsinc!elm
*
*******************************************************************************
* $Log: newmail.c,v $
* Revision 5.7 1992/12/11 01:45:04 syd
* remove sys/types.h include, it is now included by defs.h
* and this routine includes defs.h or indirectly includes defs.h
* From: Syd
*
* Revision 5.6 1992/11/17 19:23:28 syd
* add blank after priority to
*
* Revision 5.5 1992/11/07 20:05:52 syd
* change to use header_cmp to allow for linear white space around the colon
* From: Syd
*
* Revision 5.4 1992/10/27 01:43:40 syd
* Move posix_signal to lib directory
* From: tom@osf.org
*
* Revision 5.3 1992/10/25 02:54:00 syd
* add posix signal stuff as stop gap, needs to be moved to lib
* From: syd
*
* Revision 5.2 1992/10/24 13:11:42 syd
* fix newmail attempting to close a file descriptor even if the corresponding
* open failed.
* From: "Peter A. Bigot" <pab@cs.arizona.edu>
*
* Revision 5.1 1992/10/04 00:46:45 syd
* Initial checkin as of 2.4 Release at PL0
*
*
******************************************************************************/
/** This is actually two programs folded into one - 'newmail()' and
'wnewmail()'. They perform essentially the same function, to
monitor the mail arriving in a set of/a mailbox or folder, but
newmail is designed to run in background on a terminal, and
wnewmail is designed to have a window of its own to run in.
The main difference is that wnewmail checks for mail more often.
The usage parameters are:
-i <interval> how often to check for mail
(default: 60 secs if newmail,
10 secs if wnewmail)
<filename> name of a folder to monitor
(can prefix with '+'/'=', or can
default to the incoming mailbox)
<filename>=prefix file to monitor, output with specified
prefix when mail arrives.
If we're monitoring more than one mailbox the program will prefix
each line output (if 'newmail') or each cluster of mail (if 'wnewmail')
with the basename of the folder the mail has arrived in. In the
interest of exhaustive functionality, you can also use the "=prefix"
suffix (eh?) to specify your own strings to prefix messages with.
The output format is either:
newmail:
>> New mail from <user> - <subject>
>> Priority mail from <user> - <subject>
>> <folder>: from <user> - <subject>
>> <folder>: Priority from <user> - <subject>
wnewmail:
<user> - <subject>
Priority: <user> - <subject>
<folder>: <user> - <subject>
<folder>: Priority: <user> - <subject>\fR
**/
#include "elmutil.h"
#include "s_newmail.h"
#ifdef PWDINSYS
# include <sys/pwd.h>
#else
# include <pwd.h>
#endif
#include <sys/stat.h>
#define LINEFEED (char) 10
#define BEGINNING 0 /* seek fseek(3S) */
#define DEFAULT_INTERVAL 60
#define MAX_FOLDERS 25 /* max we can keep track of */
#define metachar(c) (c == '+' || c == '=' || c == '%')
char *getusername();
long bytes();
struct folder_struct {
char foldername[SLEN];
char prefix[NLEN];
long filesize;
int access_error;
} folders[MAX_FOLDERS] = {0};
int interval_time, /* how long to sleep between checks */
debug = 0, /* include verbose debug output? */
in_window = 0, /* are we running as 'wnewmail'? */
total_folders = 0, /* # of folders we're monitoring */
print_prefix = 0, /* force printing of prefix */
current_folder = 0; /* struct pointer for looping */
FILE *fd = NULL; /* fd to use to read folders */
#ifdef PIDCHECK
int parent_pid; /* See if sucide should be attempt */
#endif /* PIDCHECK */
extern int errno;
static char *no_subj, /* Pointer to No subject text */
*priority_to, /* pointer to Priority to text */
*priority_text, /* pointer to priority text */
*To_text, /* pointer To to text */
*priority_mail, /* pointer to priority mail */
*mail_text, /* pointer to mail text */
*to_text, /* pointer to to text */
*from_text; /* pointer to from text */
main(argc, argv)
int argc;
char *argv[];
{
extern char *optarg;
extern int optind;
char *ptr;
int c, i, done;
long lastsize,
newsize; /* file size for comparison.. */
register struct folder_struct *cur_folder;
int hostlen, domlen;
struct passwd *pass;
#ifndef _POSIX_SOURCE
struct passwd *getpwuid();
#endif
#ifdef I_LOCALE
setlocale(LC_ALL, "");
#endif
elm_msg_cat = catopen("elm2.4", 0);
/* Get the No subject string */
no_subj = catgets(elm_msg_cat, NewmailSet, NewmailNoSubject,
"(No Subject Specified)");
priority_to = catgets(elm_msg_cat, NewmailSet,
NewmailInWinPriorityTo, "Priority to ");
priority_text = catgets(elm_msg_cat, NewmailSet,
NewmailInWinPriority, "Priority ");
To_text = catgets(elm_msg_cat, NewmailSet, NewmailInWinTo, "To ");
priority_mail = catgets(elm_msg_cat, NewmailSet,
NewmailPriorityMail, "Priority mail ");
mail_text = catgets(elm_msg_cat, NewmailSet, NewmailMail, "Mail ");
to_text = catgets(elm_msg_cat, NewmailSet, NewmailTo, "to ");
from_text = catgets(elm_msg_cat, NewmailSet, NewmailFrom, "from ");
#ifdef HOSTCOMPILED
strncpy(hostname, HOSTNAME, sizeof(hostname) - 1);
hostname[sizeof(hostname) - 1] = '\0';
#else
gethostname(hostname, sizeof(hostname));
#endif
gethostdomain(hostdomain, sizeof(hostdomain));
/*
* see init.c for an explanation of this!
*/
hostlen = strlen(hostname);
domlen = strlen(hostdomain);
if (hostlen >= domlen) {
if (istrcmp(&hostname[hostlen - domlen], hostdomain) == 0)
strcpy(hostfullname, hostname);
else {
strcpy(hostfullname, hostname);
strcat(hostfullname, hostdomain);
}
} else {
if (istrcmp(hostname, hostdomain + 1) == 0)
strcpy(hostfullname, hostname);
else {
strcpy(hostfullname, hostname);
strcat(hostfullname, hostdomain);
}
}
/*
* get user name and full user name so we know who we are
*/
if((pass = getpwuid(getuid())) == NULL) {
fprintf(stderr, catgets(elm_msg_cat, NewmailSet, NewmailNoPasswdEntry,
"You have no password entry!"));
exit(1);
}
strcpy(username, pass->pw_name);
if((ptr = get_full_name(username)) != NULL)
strcpy(full_username, ptr);
else
strcpy(full_username, username);
#ifdef PIDCHECK /* This will get the pid that */
parent_pid = getppid(); /* started the program, ie: /bin/sh */
/* If it dies for some reason (logout)*/
#endif /* PIDCHECK */ /* Then exit the program if PIDCHECK */
interval_time = DEFAULT_INTERVAL;
/** let's see if the first character of the basename of the
command invoked is a 'w' (e.g. have we been called as
'wnewmail' rather than just 'newmail'?)
**/
for (i=0, ptr=(argv[0] + strlen(argv[0])-1); !i && ptr > argv[0]; ptr--)
if (*ptr == '/') {
in_window = (*(ptr+1) == 'w');
i++;
}
if (ptr == argv[0] && i == 0 && argv[0][0] == 'w')
in_window = 1;
while ((c = getopt(argc, argv, "di:w")) != EOF) {
switch (c) {
case 'd' : debug++; break;
case 'i' : interval_time = atoi(optarg); break;
case 'w' : in_window = 1; break;
default : usage(argv[0]); exit(1);
}
}
if (interval_time < 10)
if (interval_time == 1)
fprintf(stderr, catgets(elm_msg_cat, NewmailSet, NewmailShort,
"Warning: interval set to 1 second. I hope you know what you're doing!\n"));
else
fprintf(stderr, catgets(elm_msg_cat, NewmailSet, NewmailShortPlur,
"Warning: interval set to %d seconds. I hope you know what you're doing!\n"),
interval_time);
/* now let's parse the foldernames, if any are given */
if (optind >= argc) /* get default */
add_default_folder();
else {
while (optind < argc)
add_folder(argv[optind++]);
pad_prefixes(); /* for nice output...*/
}
if (total_folders > 1)
print_prefix = 1;
#ifdef AUTO_BACKGROUND
if (! in_window) {
if (fork()) /* automatically puts this task in background! */
exit(0);
(void) signal(SIGINT, SIG_IGN);
(void) signal(SIGQUIT, SIG_IGN);
}
#endif
(void) signal(SIGHUP, SIG_DFL);
if (in_window && ! debug)
printf(catgets(elm_msg_cat, NewmailSet, NewmailIncommingMail,
"Incoming mail:\n"));
while (1) {
#ifdef PIDCHECK
if ( kill(parent_pid,0))
exit(0);
#else
#ifndef AUTO_BACKGROUND /* won't work if we're nested this deep! */
if (getppid() == 1) /* we've lost our shell! */
exit(0);
#endif /* AUTO_BACKGROUND */
#endif /* PIDCHECK */
if (! isatty(1)) /* we're not sending output to a tty any more */
exit(0);
if (debug) printf("\n----\n");
for (i = 0; i < total_folders; i++) {
cur_folder = &folders[i];
if (debug)
printf("[checking folder #%d: %s]\n", i, cur_folder->foldername);
if ((newsize = bytes(cur_folder->foldername)) ==
cur_folder->filesize) /* no new mail has arrived! */
continue;
if ((fd = fopen(cur_folder->foldername,"r")) == NULL) {
if (errno == EACCES) {
cur_folder->access_error++;
if (cur_folder->access_error > 5) {
fprintf(stderr, catgets(elm_msg_cat, NewmailSet,
NewmailErrNoPerm,
"\nPermission to monitor \"%s\" denied!\n\n"),
cur_folder->foldername);
sleep(5);
exit(1);
}
}
continue;
}
if ((newsize = bytes(cur_folder->foldername)) >
cur_folder->filesize) { /* new mail has arrived! */
if (debug)
printf(
"\tnew mail has arrived! old size = %ld, new size=%ld\n",
cur_folder->filesize, newsize);
/* skip what we've read already... */
if (fseek(fd, cur_folder->filesize,
BEGINNING) != 0)
perror("fseek()");
cur_folder->filesize = newsize;
/* read and display new mail! */
if (read_headers(cur_folder) && ! in_window)
printf("\n\r");
}
else { /* file SHRUNK! */
cur_folder->filesize = bytes(cur_folder->foldername);
lastsize = cur_folder->filesize;
done = 0;
while (! done) {
sleep(1); /* wait for the size to stabilize */
newsize = bytes(cur_folder->foldername);
if (newsize != lastsize)
lastsize = newsize;
else
done++;
}
cur_folder->filesize = newsize;
}
(void) fclose(fd); /* close it and ... */
}
sleep(interval_time);
}
}
int
read_headers(cur_folder)
register struct folder_struct *cur_folder;
{
/** read the headers, output as found given current_folder,
the prefix of that folder, and whether we're in a window
or not.
**/
char buffer[SLEN], from_whom[SLEN], to_whom[SLEN], subject[SLEN];
register int subj = 0, in_header = 0, count = 0, priority=0;
#ifdef MMDF
int newheader = 0;
#endif /* MMDF */
from_whom[0] = '\0';
to_whom[0] = '\0';
while (mail_gets(buffer, SLEN, fd) != 0) {
#ifdef MMDF
if (strcmp(buffer, MSG_SEPARATOR) == 0) {
newheader = !newheader;
if (newheader) {
#else
if (first_word(buffer,"From ")) {
if (real_from(buffer, from_whom)) {
#endif /* MMDF */
subj = 0;
priority = 0;
in_header = 1;
subject[0] ='\0';
if (in_window)
putchar((char) 007); /* BEEP!*/
else
printf("\n\r"); /* blank lines surrounding message */
}
}
else if (in_header) {
#ifdef MMDF
if (first_word(buffer,"From "))
real_from(buffer, from_whom);
#endif /* MMDF */
if (first_word_nc(buffer,">From"))
forwarded(buffer, from_whom); /* return address */
else if (header_cmp(buffer,"Subject", NULL) ||
header_cmp(buffer,"Re", NULL)) {
if (! subj++) {
remove_header_keyword(buffer);
strcpy(subject, buffer);
}
}
else if (header_cmp(buffer, "Priority", NULL) ||
header_cmp(buffer, "Importance", "2")) {
if (!(header_cmp(buffer, "priority", "normal") ||
header_cmp(buffer, "priority", "non-urgent")))
priority++;
}
else if (header_cmp(buffer,"From", NULL))
parse_arpa_who(buffer, from_whom, 0);
else if (header_cmp(buffer, "To", NULL))
figure_out_addressee(index(buffer, ':') + 1, to_whom);
else if (buffer[0] == LINEFEED) {
in_header = 0; /* in body of message! */
#ifdef MMDF
if (*from_whom == '\0')
strcpy(from_whom,getusername());
#endif /* MMDF */
show_header(priority, from_whom, to_whom, subject, cur_folder);
count++;
from_whom[0] = '\0';
to_whom[0] = '\0';
}
}
}
return(count);
}
add_folder(name)
char *name;
{
/* add the specified folder to the list of folders...ignore any
problems we may having finding it (user could be monitoring
a mailbox that doesn't currently exist, for example)
*/
char *cp, buf[SLEN];
if (current_folder > MAX_FOLDERS) {
fprintf(stderr, catgets(elm_msg_cat, NewmailSet, NewmailErrMaxFolders,
"Sorry, but I can only keep track of %d folders.\n"), MAX_FOLDERS);
exit(1);
}
/* now let's rip off the suffix "=<string>" if it's there... */
for (cp = name + strlen(name); cp > name+1 && *cp != '=' ; cp--)
/* just keep stepping backwards */ ;
/* if *cp isn't pointing to the first character we'e got something! */
if (cp > name+1) {
*cp++ = '\0'; /* null terminate the filename & get prefix */
if (metachar(*cp)) cp++;
strcpy(folders[current_folder].prefix, cp);
print_prefix = 1;
}
else { /* nope, let's get the basename of the file */
for (cp = name + strlen(name); cp > name && *cp != '/'; cp--)
/* backing up a bit... */ ;
if (metachar(*cp)) cp++;
if (*cp == '/') cp++;
strcpy(folders[current_folder].prefix, cp);
}
/* and next let's see what kind of weird prefix chars this user
might be testing us with. We can have '+'|'='|'%' to expand
or a file located in the incoming mail dir...
*/
if (metachar(name[0]))
expand_filename(name, folders[current_folder].foldername);
else if (access(name, 00) == -1) {
/* let's try it in the mail home directory */
sprintf(buf, "%s%s", mailhome, name);
if (access(buf, 00) != -1) /* aha! */
strcpy(folders[current_folder].foldername, buf);
else
strcpy(folders[current_folder].foldername, name);
}
else
strcpy(folders[current_folder].foldername, name);
/* now let's try to actually open the file descriptor and grab
a size... */
if ((fd = fopen(folders[current_folder].foldername, "r")) == NULL)
if (errno == EACCES) {
fprintf(stderr, catgets(elm_msg_cat, NewmailSet, NewmailErrNoPerm,
"\nPermission to monitor \"%s\" denied!\n\n"),
folders[current_folder].foldername);
exit(1);
}
folders[current_folder].filesize =
bytes(folders[current_folder].foldername);
/* and finally let's output what we did */
if (debug)
printf("folder %d: \"%s\" <%s> %s, size = %ld\n",
current_folder,
folders[current_folder].foldername,
folders[current_folder].prefix,
fd == NULL? "not found" : "opened",
folders[current_folder].filesize);
if (fd != NULL) /* Close it only if we succeeded in opening it */
(void) fclose(fd);
/* and increment current-folder please! */
current_folder++;
total_folders++;
}
add_default_folder()
{
char *cp;
/* this routine will add the users home mailbox as the folder
* to monitor. Since there'll only be one folder we'll never
* prefix it either...
* determine mail file from environment variable if found,
* else use password entry
*/
if ((cp = getenv("MAIL")) == NULL)
sprintf(folders[0].foldername, "%s%s", mailhome, getusername());
else
strcpy(folders[0].foldername, cp);
fd = fopen(folders[0].foldername, "r");
folders[0].filesize = bytes(folders[0].foldername);
if (debug)
printf("default folder: \"%s\" <%s> %s, size = %ld\n",
folders[0].foldername,
folders[0].prefix,
fd == NULL? "not found" : "opened",
folders[0].filesize);
total_folders = 1;
if (fd != NULL) /* Close it only if we succeeded in opening it */
fclose(fd);
}
int
real_from(buffer, who)
char *buffer, *who;
{
/***** returns true iff 's' has the seven 'from' fields,
initializing the who to the sender *****/
char junk[SLEN], who_tmp[SLEN];
junk[0] = '\0';
who_tmp[0] = '\0';
sscanf(buffer, "%*s %s %*s %*s %*s %*s %s",
who_tmp, junk);
if (junk[0] != '\0')
strcpy(who, who_tmp);
return(junk[0] != '\0');
}
forwarded(buffer, who)
char *buffer, *who;
{
/** change 'from' and date fields to reflect the ORIGINATOR of
the message by iteratively parsing the >From fields... **/
char machine[SLEN], buff[SLEN];
machine[0] = '\0';
sscanf(buffer, "%*s %s %*s %*s %*s %*s %*s %*s %*s %*s %s",
who, machine);
if(machine[0] == '\0') /* try for address with timezone in date */
sscanf(buffer, "%*s %s %*s %*s %*s %*s %*s %*s %*s %s",
who, machine);
if (machine[0] == '\0') /* try for srm address */
sscanf(buffer, "%*s %s %*s %*s %*s %*s %*s %*s %s",
who, machine);
if (machine[0] == '\0')
sprintf(buff,"anonymous");
else
sprintf(buff,"%s!%s", machine, who);
strncpy(who, buff, SLEN);
}
show_header(priority, from, to, subject, cur_folder)
int priority;
char *from, *to, *subject;
struct folder_struct *cur_folder;
{
char from_line[SLEN];
char prefix[SLEN];
int used_to_line;
used_to_line = tail_of(from, from_line, to);
if (*subject == '\0')
strcpy(subject, no_subj);
prefix[0] = '\0';
if (! in_window)
strcat(prefix, ">> ");
if (print_prefix) {
strcat(prefix, cur_folder->prefix);
strcat(prefix, ": ");
}
if (in_window) {
if (priority && used_to_line)
strcat(prefix, priority_to);
else if (priority)
strcat(prefix, priority_text);
else if (used_to_line)
strcat(prefix, To_text);
}
else {
if (priority)
strcat(prefix, priority_mail);
else
strcat(prefix, mail_text);
if (used_to_line)
strcat(prefix, to_text);
else
strcat(prefix, from_text);
}
if (in_window)
printf("%s%s -- %s\n", prefix, from_line, subject);
else
printf("%s%s - %s\n\r", prefix, from_line, subject);
}
long
bytes(name)
char *name;
{
/** return the number of bytes in the specified file. This
is to check to see if new mail has arrived.... **/
int ok = 1;
extern int errno; /* system error number! */
struct stat buffer;
if (stat(name, &buffer) != 0)
if (errno != 2) {
MCfprintf(stderr, catgets(elm_msg_cat, NewmailSet, NewmailErrFstat,
"Error %d attempting fstat on %s"), errno, name);
exit(1);
}
else
ok = 0;
return(ok ? buffer.st_size : 0);
}
char *getusername()
{
/** Getting the username on some systems is a real pain, so...
This routine is guaranteed to return a usable username **/
char *return_value, *getlogin(), *cuserid();
if ((return_value = getlogin()) == NULL)
if ((return_value = cuserid(NULL)) == NULL) {
printf(catgets(elm_msg_cat, NewmailSet, NewmailErrUsername,
"Newmail: I can't get username!\n"));
exit(1);
}
return( (char *) return_value);
}
usage(name)
char *name;
{
/* print a nice friendly usage message */
fprintf(stderr, catgets(elm_msg_cat, NewmailSet, NewmailArgsHelp1,
"\nUsage: %s [-d] [-i interval] [-w] {folders}\n\
\targ\t\t\tMeaning\n\r\
\t -d \tturns on debugging output\n\
\t -i D\tsets the interval checking time to 'D' seconds\n\
\t -w \tforces 'window'-style output, and bypasses auto-background\n\n"));
fprintf(stderr, catgets(elm_msg_cat, NewmailSet, NewmailArgsHelp2,
"folders can be specified by relative or absolute path names, can be the name\n\
of a mailbox in the incoming mail directory to check, or can have one of the\n\
standard Elm mail directory prefix chars (e.g. '+', '=' or '%').\n\
Furthermore, any folder can have '=string' as a suffix to indicate a folder\n\
identifier other than the basename of the file\n\n"));
}
expand_filename(name, store_space)
char *name, *store_space;
{
strcpy(store_space, name);
if (expand(store_space) == 0) {
fprintf(stderr, catgets(elm_msg_cat, NewmailSet, NewmailErrExpand,
"Sorry, but I couldn't expand \"%s\"\n"),name);
exit(1);
}
}
pad_prefixes()
{
/** This simple routine is to ensure that we have a nice
output format. What it does is whip through the different
prefix strings we've been given, figures out the maximum
length, then space pads the other prefixes to match.
**/
register int i, j, len = 0;
for (i=0; i < total_folders; i++)
if (len < (j=strlen(folders[i].prefix)))
len = j;
for (i=0; i < total_folders; i++)
for (j = strlen(folders[i].prefix); j < len; j++)
strcat(folders[i].prefix, " ");
}
These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.