+++ /dev/null
-/* sendmail-like interface to /bin/mail for system V,
- Copyright (C) 1985, 1994, 1999, 2001-2011 Free Software Foundation, Inc.
-
-Author: Bill Rozas <jinx@martigny.ai.mit.edu>
-(according to ack.texi)
-
-This file is part of GNU Emacs.
-
-GNU Emacs is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-GNU Emacs is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
-
-
-#define _XOPEN_SOURCE 500 /* for cuserid */
-
-#ifdef HAVE_CONFIG_H
-#include <config.h>
-#endif
-
-#if defined (BSD_SYSTEM) && !defined (USE_FAKEMAIL)
-/* This program isnot used in BSD, so just avoid loader complaints. */
-int
-main (void)
-{
- return 0;
-}
-#else /* not BSD 4.2 (or newer) */
-#ifdef MSDOS
-int
-main ()
-{
- return 0;
-}
-#else /* not MSDOS */
-/* This conditional contains all the rest of the file. */
-
-/* These are defined in config in some versions. */
-
-#ifdef static
-#undef static
-#endif
-
-#ifdef WINDOWSNT
-#include "ntlib.h"
-#endif
-
-#include <stdio.h>
-#include <string.h>
-#include <ctype.h>
-#include <time.h>
-#include <pwd.h>
-#include <stdlib.h>
-
-/* This is to declare cuserid. */
-#include <unistd.h>
-\f
-/* Type definitions */
-
-#define boolean int
-#define true 1
-#define false 0
-
-#define TM_YEAR_BASE 1900
-
-/* Nonzero if TM_YEAR is a struct tm's tm_year value that causes
- asctime to have well-defined behavior. */
-#ifndef TM_YEAR_IN_ASCTIME_RANGE
-# define TM_YEAR_IN_ASCTIME_RANGE(tm_year) \
- (1000 - TM_YEAR_BASE <= (tm_year) && (tm_year) <= 9999 - TM_YEAR_BASE)
-#endif
-
-/* Various lists */
-
-struct line_record
-{
- char *string;
- struct line_record *continuation;
-};
-typedef struct line_record *line_list;
-
-struct header_record
-{
- line_list text;
- struct header_record *next;
- struct header_record *previous;
-};
-typedef struct header_record *header;
-
-struct stream_record
-{
- FILE *handle;
- int (*action)(FILE *);
- struct stream_record *rest_streams;
-};
-typedef struct stream_record *stream_list;
-
-/* A `struct linebuffer' is a structure which holds a line of text.
- * `readline' reads a line from a stream into a linebuffer
- * and works regardless of the length of the line.
- */
-
-struct linebuffer
-{
- long size;
- char *buffer;
-};
-
-struct linebuffer lb;
-
-#define new_list() \
- ((line_list) xmalloc (sizeof (struct line_record)))
-#define new_header() \
- ((header) xmalloc (sizeof (struct header_record)))
-#define new_stream() \
- ((stream_list) xmalloc (sizeof (struct stream_record)))
-#define alloc_string(nchars) \
- ((char *) xmalloc ((nchars) + 1))
-\f
-/* Global declarations */
-
-#define BUFLEN 1024
-#define KEYWORD_SIZE 256
-#define FROM_PREFIX "From"
-#define MY_NAME "fakemail"
-#define NIL ((line_list) NULL)
-#define INITIAL_LINE_SIZE 200
-
-#ifndef MAIL_PROGRAM_NAME
-#define MAIL_PROGRAM_NAME "/bin/mail"
-#endif
-
-static const char *my_name;
-static char *the_date;
-static char *the_user;
-static line_list file_preface;
-static stream_list the_streams;
-static boolean no_problems = true;
-
-static void fatal (const char *s1) NO_RETURN;
-
-#ifdef CURRENT_USER
-static struct passwd *my_entry;
-#define cuserid(s) \
-(my_entry = getpwuid (((int) geteuid ())), \
- my_entry->pw_name)
-#endif
-\f
-/* Utilities */
-
-/* Print error message. `s1' is printf control string, `s2' is arg for it. */
-
-static void
-error (const char *s1, const char *s2)
-{
- printf ("%s: ", my_name);
- printf (s1, s2);
- printf ("\n");
- no_problems = false;
-}
-
-/* Print error message and exit. */
-
-static void
-fatal (const char *s1)
-{
- error ("%s", s1);
- exit (EXIT_FAILURE);
-}
-
-/* Like malloc but get fatal error if memory is exhausted. */
-
-static void *
-xmalloc (size_t size)
-{
- void *result = malloc (size);
- if (! result)
- fatal ("virtual memory exhausted");
- return result;
-}
-
-static void *
-xrealloc (void *ptr, size_t size)
-{
- void *result = realloc (ptr, size);
- if (! result)
- fatal ("virtual memory exhausted");
- return result;
-}
-\f
-/* Initialize a linebuffer for use */
-
-static void
-init_linebuffer (struct linebuffer *linebuffer)
-{
- linebuffer->size = INITIAL_LINE_SIZE;
- linebuffer->buffer = ((char *) xmalloc (INITIAL_LINE_SIZE));
-}
-
-/* Read a line of text from `stream' into `linebuffer'.
- Return the length of the line. */
-
-static long
-readline (struct linebuffer *linebuffer, FILE *stream)
-{
- char *buffer = linebuffer->buffer;
- char *p = linebuffer->buffer;
- char *end = p + linebuffer->size;
-
- while (true)
- {
- int c = getc (stream);
- if (p == end)
- {
- linebuffer->size *= 2;
- buffer = (char *) xrealloc (buffer, linebuffer->size);
- p = buffer + (p - linebuffer->buffer);
- end = buffer + linebuffer->size;
- linebuffer->buffer = buffer;
- }
- if (c < 0 || c == '\n')
- {
- *p = 0;
- break;
- }
- *p++ = c;
- }
-
- return p - buffer;
-}
-\f
-/* Extract a colon-terminated keyword from the string FIELD.
- Return that keyword as a string stored in a static buffer.
- Store the address of the rest of the string into *REST.
-
- If there is no keyword, return NULL and don't alter *REST. */
-
-static char *
-get_keyword (register char *field, char **rest)
-{
- static char keyword[KEYWORD_SIZE];
- register char *ptr;
- register int c;
-
- ptr = &keyword[0];
- c = (unsigned char) *field++;
- if (isspace (c) || c == ':')
- return ((char *) NULL);
- *ptr++ = (islower (c) ? toupper (c) : c);
- while (((c = (unsigned char) *field++) != ':') && ! isspace (c))
- *ptr++ = (islower (c) ? toupper (c) : c);
- *ptr++ = '\0';
- while (isspace (c))
- c = (unsigned char) *field++;
- if (c != ':')
- return ((char *) NULL);
- *rest = field;
- return &keyword[0];
-}
-
-/* Nonzero if the string FIELD starts with a colon-terminated keyword. */
-
-static boolean
-has_keyword (char *field)
-{
- char *ignored;
- return (get_keyword (field, &ignored) != ((char *) NULL));
-}
-
-/* Store the string FIELD, followed by any lines in THE_LIST,
- into the buffer WHERE.
- Concatenate lines, putting just a space between them.
- Delete everything contained in parentheses.
- When a recipient name contains <...>, we discard
- everything except what is inside the <...>.
-
- We don't pay attention to overflowing WHERE;
- the caller has to make it big enough. */
-
-static char *
-add_field (line_list the_list, register char *field, register char *where)
-{
- register char c;
- while (true)
- {
- char *this_recipient_where;
- int in_quotes = 0;
-
- *where++ = ' ';
- this_recipient_where = where;
-
- while ((c = *field++) != '\0')
- {
- if (c == '\\')
- *where++ = c;
- else if (c == '"')
- {
- in_quotes = ! in_quotes;
- *where++ = c;
- }
- else if (in_quotes)
- *where++ = c;
- else if (c == '(')
- {
- while (*field && *field != ')') ++field;
- if (! (*field++)) break; /* no close */
- continue;
- }
- else if (c == ',')
- {
- *where++ = ' ';
- /* When we get to the end of one recipient,
- don't discard it if the next one has <...>. */
- this_recipient_where = where;
- }
- else if (c == '<')
- /* Discard everything we got before the `<'. */
- where = this_recipient_where;
- else if (c == '>')
- /* Discard the rest of this name that follows the `>'. */
- {
- while (*field && *field != ',') ++field;
- if (! (*field++)) break; /* no comma */
- continue;
- }
- else
- *where++ = c;
- }
- if (the_list == NIL) break;
- field = the_list->string;
- the_list = the_list->continuation;
- }
- return where;
-}
-\f
-static line_list
-make_file_preface (void)
-{
- char *the_string, *temp;
- long idiotic_interface;
- struct tm *tm;
- long prefix_length;
- long user_length;
- long date_length;
- line_list result;
-
- prefix_length = strlen (FROM_PREFIX);
- time (&idiotic_interface);
- /* Convert to a string, checking for out-of-range time stamps.
- Don't use 'ctime', as that might dump core if the hardware clock
- is set to a bizarre value. */
- tm = localtime (&idiotic_interface);
- if (! (tm && TM_YEAR_IN_ASCTIME_RANGE (tm->tm_year)
- && (the_date = asctime (tm))))
- fatal ("current time is out of range");
- /* the_date has an unwanted newline at the end */
- date_length = strlen (the_date) - 1;
- the_date[date_length] = '\0';
- temp = cuserid ((char *) NULL);
- user_length = strlen (temp);
- the_user = alloc_string (user_length + 1);
- strcpy (the_user, temp);
- the_string = alloc_string (3 + prefix_length
- + user_length
- + date_length);
- temp = the_string;
- strcpy (temp, FROM_PREFIX);
- temp = &temp[prefix_length];
- *temp++ = ' ';
- strcpy (temp, the_user);
- temp = &temp[user_length];
- *temp++ = ' ';
- strcpy (temp, the_date);
- result = new_list ();
- result->string = the_string;
- result->continuation = ((line_list) NULL);
- return result;
-}
-
-static void
-write_line_list (register line_list the_list, FILE *the_stream)
-{
- for ( ;
- the_list != ((line_list) NULL) ;
- the_list = the_list->continuation)
- {
- fputs (the_list->string, the_stream);
- putc ('\n', the_stream);
- }
- return;
-}
-\f
-static int
-close_the_streams (void)
-{
- register stream_list rem;
- for (rem = the_streams;
- rem != ((stream_list) NULL);
- rem = rem->rest_streams)
- if (no_problems && (*rem->action) (rem->handle) != 0)
- error ("output error", NULL);
- the_streams = ((stream_list) NULL);
- return (no_problems ? EXIT_SUCCESS : EXIT_FAILURE);
-}
-
-static void
-add_a_stream (FILE *the_stream, int (*closing_action) (FILE *))
-{
- stream_list old = the_streams;
- the_streams = new_stream ();
- the_streams->handle = the_stream;
- the_streams->action = closing_action;
- the_streams->rest_streams = old;
- return;
-}
-
-static int
-my_fclose (FILE *the_file)
-{
- putc ('\n', the_file);
- fflush (the_file);
- if (ferror (the_file))
- return EOF;
- return fclose (the_file);
-}
-
-static boolean
-open_a_file (char *name)
-{
- FILE *the_stream = fopen (name, "a");
- if (the_stream != ((FILE *) NULL))
- {
- add_a_stream (the_stream, my_fclose);
- if (the_user == ((char *) NULL))
- file_preface = make_file_preface ();
- write_line_list (file_preface, the_stream);
- return true;
- }
- return false;
-}
-
-static void
-put_string (char *s)
-{
- register stream_list rem;
- for (rem = the_streams;
- rem != ((stream_list) NULL);
- rem = rem->rest_streams)
- fputs (s, rem->handle);
- return;
-}
-
-static void
-put_line (const char *string)
-{
- register stream_list rem;
- for (rem = the_streams;
- rem != ((stream_list) NULL);
- rem = rem->rest_streams)
- {
- const char *s = string;
- int column = 0;
-
- /* Divide STRING into lines. */
- while (*s != 0)
- {
- const char *breakpos;
-
- /* Find the last char that fits. */
- for (breakpos = s; *breakpos && column < 78; ++breakpos)
- {
- if (*breakpos == '\t')
- column += 8;
- else
- column++;
- }
- /* If we didn't reach end of line, break the line. */
- if (*breakpos)
- {
- /* Back up to just after the last comma that fits. */
- while (breakpos != s && breakpos[-1] != ',') --breakpos;
-
- if (breakpos == s)
- {
- /* If no comma fits, move past the first address anyway. */
- while (*breakpos != 0 && *breakpos != ',') ++breakpos;
- if (*breakpos != 0)
- /* Include the comma after it. */
- ++breakpos;
- }
- }
- /* Output that much, then break the line. */
- fwrite (s, 1, breakpos - s, rem->handle);
- column = 8;
-
- /* Skip whitespace and prepare to print more addresses. */
- s = breakpos;
- while (*s == ' ' || *s == '\t') ++s;
- if (*s != 0)
- fputs ("\n\t", rem->handle);
- }
- putc ('\n', rem->handle);
- }
- return;
-}
-\f
-#define mail_error error
-
-/* Handle an FCC field. FIELD is the text of the first line (after
- the header name), and THE_LIST holds the continuation lines if any.
- Call open_a_file for each file. */
-
-static void
-setup_files (register line_list the_list, register char *field)
-{
- register char *start;
- register char c;
- while (true)
- {
- while (((c = *field) != '\0')
- && (c == ' '
- || c == '\t'
- || c == ','))
- field += 1;
- if (c != '\0')
- {
- start = field;
- while (((c = *field) != '\0')
- && c != ' '
- && c != '\t'
- && c != ',')
- field += 1;
- *field = '\0';
- if (!open_a_file (start))
- mail_error ("Could not open file %s", start);
- *field = c;
- if (c != '\0') continue;
- }
- if (the_list == ((line_list) NULL))
- return;
- field = the_list->string;
- the_list = the_list->continuation;
- }
-}
-\f
-/* Compute the total size of all recipient names stored in THE_HEADER.
- The result says how big to make the buffer to pass to parse_header. */
-
-static int
-args_size (header the_header)
-{
- register header old = the_header;
- register line_list rem;
- register int size = 0;
- do
- {
- char *field;
- register char *keyword = get_keyword (the_header->text->string, &field);
- if ((strcmp (keyword, "TO") == 0)
- || (strcmp (keyword, "CC") == 0)
- || (strcmp (keyword, "BCC") == 0))
- {
- size += 1 + strlen (field);
- for (rem = the_header->text->continuation;
- rem != NIL;
- rem = rem->continuation)
- size += 1 + strlen (rem->string);
- }
- the_header = the_header->next;
- } while (the_header != old);
- return size;
-}
-
-/* Scan the header described by the lists THE_HEADER,
- and put all recipient names into the buffer WHERE.
- Precede each recipient name with a space.
-
- Also, if the header has any FCC fields, call setup_files for each one. */
-
-static void
-parse_header (header the_header, register char *where)
-{
- register header old = the_header;
- do
- {
- char *field;
- register char *keyword = get_keyword (the_header->text->string, &field);
- if (strcmp (keyword, "TO") == 0)
- where = add_field (the_header->text->continuation, field, where);
- else if (strcmp (keyword, "CC") == 0)
- where = add_field (the_header->text->continuation, field, where);
- else if (strcmp (keyword, "BCC") == 0)
- {
- where = add_field (the_header->text->continuation, field, where);
- the_header->previous->next = the_header->next;
- the_header->next->previous = the_header->previous;
- }
- else if (strcmp (keyword, "FCC") == 0)
- setup_files (the_header->text->continuation, field);
- the_header = the_header->next;
- } while (the_header != old);
- *where = '\0';
- return;
-}
-\f
-/* Read lines from the input until we get a blank line.
- Create a list of `header' objects, one for each header field,
- each of which points to a list of `line_list' objects,
- one for each line in that field.
- Continuation lines are grouped in the headers they continue. */
-
-static header
-read_header (void)
-{
- register header the_header = ((header) NULL);
- register line_list *next_line = ((line_list *) NULL);
-
- init_linebuffer (&lb);
-
- do
- {
- long length;
- register char *line;
-
- readline (&lb, stdin);
- line = lb.buffer;
- length = strlen (line);
- if (length == 0) break;
-
- if (has_keyword (line))
- {
- register header old = the_header;
- the_header = new_header ();
- if (old == ((header) NULL))
- {
- the_header->next = the_header;
- the_header->previous = the_header;
- }
- else
- {
- the_header->previous = old;
- the_header->next = old->next;
- old->next = the_header;
- }
- next_line = &(the_header->text);
- }
-
- if (next_line == ((line_list *) NULL))
- {
- /* Not a valid header */
- exit (EXIT_FAILURE);
- }
- *next_line = new_list ();
- (*next_line)->string = alloc_string (length);
- strcpy (((*next_line)->string), line);
- next_line = &((*next_line)->continuation);
- *next_line = NIL;
-
- } while (true);
-
- if (! the_header)
- fatal ("input message has no header");
- return the_header->next;
-}
-\f
-static void
-write_header (header the_header)
-{
- register header old = the_header;
- do
- {
- register line_list the_list;
- for (the_list = the_header->text;
- the_list != NIL;
- the_list = the_list->continuation)
- put_line (the_list->string);
- the_header = the_header->next;
- } while (the_header != old);
- put_line ("");
- return;
-}
-\f
-int
-main (int argc, char **argv)
-{
- char *command_line;
- header the_header;
- long name_length;
- const char *mail_program_name;
- char buf[BUFLEN + 1];
- register int size;
- FILE *the_pipe;
-
- mail_program_name = getenv ("FAKEMAILER");
- if (!(mail_program_name && *mail_program_name))
- mail_program_name = MAIL_PROGRAM_NAME;
- name_length = strlen (mail_program_name);
-
- my_name = MY_NAME;
- the_streams = ((stream_list) NULL);
- the_date = ((char *) NULL);
- the_user = ((char *) NULL);
-
- the_header = read_header ();
- command_line = alloc_string (name_length + args_size (the_header));
- strcpy (command_line, mail_program_name);
- parse_header (the_header, &command_line[name_length]);
-
- the_pipe = popen (command_line, "w");
- if (the_pipe == ((FILE *) NULL))
- fatal ("cannot open pipe to real mailer");
-
- add_a_stream (the_pipe, pclose);
-
- write_header (the_header);
-
- /* Dump the message itself */
-
- while (!feof (stdin))
- {
- size = fread (buf, 1, BUFLEN, stdin);
- buf[size] = '\0';
- put_string (buf);
- }
-
- if (no_problems && (ferror (stdin) || fclose (stdin) != 0))
- error ("input error", NULL);
-
- exit (close_the_streams ());
-}
-
-#endif /* not MSDOS */
-#endif /* not BSD 4.2 (or newer) */
-
-
-/* fakemail.c ends here */
projects / emacs.git / commitdiff