summaryrefslogtreecommitdiff
path: root/etc/fakemail.c
diff options
context:
space:
mode:
Diffstat (limited to 'etc/fakemail.c')
-rw-r--r--etc/fakemail.c609
1 files changed, 609 insertions, 0 deletions
diff --git a/etc/fakemail.c b/etc/fakemail.c
new file mode 100644
index 00000000000..9fedf7c598c
--- /dev/null
+++ b/etc/fakemail.c
@@ -0,0 +1,609 @@
+/* sendmail-like interface to /bin/mail for system V,
+ Copyright (C) 1985 Free Software Foundation, Inc.
+
+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 1, 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; see the file COPYING. If not, write to
+the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+
+#define NO_SHORTNAMES
+#include "../src/config.h"
+
+#if defined (BSD) && !defined (BSD4_1)
+/* This program isnot used in BSD, so just avoid loader complaints. */
+main ()
+{
+}
+#else /* not BSD 4.2 (or newer) */
+/* This conditional contains all the rest of the file. */
+
+/* These are defined in config in some versions. */
+
+#ifdef static
+#undef static
+#endif
+
+#ifdef read
+#undef read
+#undef write
+#undef open
+#undef close
+#endif
+
+#include <stdio.h>
+#include <string.h>
+#include <ctype.h>
+#include <time.h>
+#include <pwd.h>
+
+/* Type definitions */
+
+#define boolean int
+#define true 1
+#define false 0
+
+/* 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)();
+ 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))
+
+/* 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 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;
+
+extern FILE *popen ();
+extern int fclose (), pclose ();
+extern char *malloc (), *realloc ();
+
+#ifdef CURRENT_USER
+extern struct passwd *getpwuid ();
+extern unsigned short geteuid ();
+static struct passwd *my_entry;
+#define cuserid(s) \
+(my_entry = getpwuid (((int) geteuid ())), \
+ my_entry->pw_name)
+#endif
+
+/* Utilities */
+
+/* Print error message. `s1' is printf control string, `s2' is arg for it. */
+
+static void
+error (s1, s2)
+ char *s1, *s2;
+{
+ printf ("%s: ", my_name);
+ printf (s1, s2);
+ printf ("\n");
+ no_problems = false;
+}
+
+/* Print error message and exit. */
+
+static void
+fatal (s1, s2)
+ char *s1, *s2;
+{
+ error (s1, s2);
+ exit (1);
+}
+
+/* Like malloc but get fatal error if memory is exhausted. */
+
+static char *
+xmalloc (size)
+ int size;
+{
+ char *result = malloc (((unsigned) size));
+ if (result == ((char *) NULL))
+ fatal ("virtual memory exhausted", 0);
+ return result;
+}
+
+static char *
+xrealloc (ptr, size)
+ char *ptr;
+ int size;
+{
+ char *result = realloc (ptr, ((unsigned) size));
+ if (result == ((char *) NULL))
+ fatal ("virtual memory exhausted");
+ return result;
+}
+
+/* Initialize a linebuffer for use */
+
+void
+init_linebuffer (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.
+ */
+
+long
+readline (linebuffer, stream)
+ 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 - linebuffer->buffer;
+ end += buffer - linebuffer->buffer;
+ linebuffer->buffer = buffer;
+ }
+ if (c < 0 || c == '\n')
+ {
+ *p = 0;
+ break;
+ }
+ *p++ = c;
+ }
+
+ return p - buffer;
+}
+
+char *
+get_keyword (field, rest)
+ register char *field;
+ char **rest;
+{
+ static char keyword[KEYWORD_SIZE];
+ register char *ptr;
+ register char c;
+
+ ptr = &keyword[0];
+ c = *field++;
+ if ((isspace (c)) || (c == ':'))
+ return ((char *) NULL);
+ *ptr++ = ((islower (c)) ? (toupper (c)) : c);
+ while (((c = *field++) != ':') && (!(isspace (c))))
+ *ptr++ = ((islower (c)) ? (toupper (c)) : c);
+ *ptr++ = '\0';
+ while (isspace (c)) c = *field++;
+ if (c != ':') return ((char *) NULL);
+ *rest = field;
+ return &keyword[0];
+}
+
+boolean
+has_keyword (field)
+ char *field;
+{
+ char *ignored;
+ return (get_keyword (field, &ignored) != ((char *) NULL));
+}
+
+char *
+add_field (the_list, field, where)
+ line_list the_list;
+ register char *field, *where;
+{
+ register char c;
+ while (true)
+ {
+ *where++ = ' ';
+ while ((c = *field++) != '\0')
+ *where++ = ((c == ',') ? ' ' : c);
+ if (the_list == NIL) break;
+ field = the_list->string;
+ the_list = the_list->continuation;
+ }
+ return where;
+}
+
+line_list
+make_file_preface ()
+{
+ char *the_string, *temp;
+ long idiotic_interface;
+ long prefix_length;
+ long user_length;
+ long date_length;
+ line_list result;
+
+ prefix_length = strlen (FROM_PREFIX);
+ time (&idiotic_interface);
+ the_date = ctime (&idiotic_interface);
+ /* 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;
+}
+
+void
+write_line_list (the_list, the_stream)
+ 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;
+}
+
+int
+close_the_streams ()
+{
+ register stream_list rem;
+ for (rem = the_streams;
+ rem != ((stream_list) NULL);
+ rem = rem->rest_streams)
+ no_problems = (no_problems &&
+ ((*rem->action) (rem->handle) == 0));
+ the_streams = ((stream_list) NULL);
+ return (no_problems ? 0 : 1);
+}
+
+void
+add_a_stream (the_stream, closing_action)
+ FILE *the_stream;
+ int (*closing_action)();
+{
+ 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;
+}
+
+int
+my_fclose (the_file)
+ FILE *the_file;
+{
+ putc ('\n', the_file);
+ fflush (the_file);
+ return fclose (the_file);
+}
+
+boolean
+open_a_file (name)
+ 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;
+}
+
+void
+put_string (s)
+ char *s;
+{
+ register stream_list rem;
+ for (rem = the_streams;
+ rem != ((stream_list) NULL);
+ rem = rem->rest_streams)
+ fputs (s, rem->handle);
+ return;
+}
+
+void
+put_line (s)
+ char *s;
+{
+ register stream_list rem;
+ for (rem = the_streams;
+ rem != ((stream_list) NULL);
+ rem = rem->rest_streams)
+ {
+ fputs (s, rem->handle);
+ putc ('\n', rem->handle);
+ }
+ return;
+}
+
+#define mail_error error
+
+void
+setup_files (the_list, field)
+ 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;
+ }
+}
+
+int
+args_size (the_header)
+ 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;
+}
+
+parse_header (the_header, where)
+ 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;
+}
+
+header
+read_header ()
+{
+ 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 (1);
+ }
+ *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);
+
+ return the_header->next;
+}
+
+void
+write_header (the_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;
+}
+
+void
+main (argc, argv)
+ int argc;
+ char **argv;
+{
+ char *command_line;
+ header the_header;
+ long name_length = strlen (MAIL_PROGRAM_NAME);
+ char buf[BUFLEN + 1];
+ register int size;
+ FILE *the_pipe;
+
+ 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);
+ }
+
+ exit (close_the_streams ());
+}
+
+#endif /* not BSD 4.2 (or newer) */
generated by cgit v1.2.3 (git 2.39.1) at 2024-05-23 05:22:16 +0000