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/* $OpenBSD: delivery_filename.c,v 1.13 2015/10/10 11:42:49 jung Exp $ */
/*
* Copyright (c) 2011 Gilles Chehade <gilles@poolp.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <sys/queue.h>
#include <sys/tree.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <event.h>
#include <fcntl.h>
#include <imsg.h>
#include <paths.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include <limits.h>
#include "smtpd.h"
#include "log.h"
extern char **environ;
/* filename backend */
static void delivery_filename_open(struct deliver *);
struct delivery_backend delivery_backend_filename = {
0, delivery_filename_open
};
static void
delivery_filename_open(struct deliver *deliver)
{
struct stat sb;
size_t sz = 0;
ssize_t len;
int fd;
FILE *fp;
char *ln = NULL;
char *msg;
int n;
int escape_from;
#define error(m) { msg = m; goto err; }
#define error2(m) { msg = m; goto err2; }
setproctitle("file delivery");
fd = open(deliver->to, O_CREAT | O_APPEND | O_WRONLY, 0600);
if (fd < 0)
error("open");
if (fstat(fd, &sb) < 0)
error("fstat");
if (S_ISREG(sb.st_mode) && flock(fd, LOCK_EX) < 0)
error("flock");
fp = fdopen(fd, "a");
if (fp == NULL)
error("fdopen");
escape_from = 0;
while ((len = getline(&ln, &sz, stdin)) != -1) {
if (ln[len - 1] == '\n')
ln[len - 1] = '\0';
if (strncmp(ln, "From ", 5) == 0) {
if (escape_from == 0)
escape_from = 1;
else
putc('>', fp);
}
fprintf(fp, "%s\n", ln);
if (ferror(fp))
break;
}
free(ln);
if (ferror(stdin))
error2("read error");
putc('\n', fp);
if (fflush(fp) == EOF || ferror(fp))
error2("write error");
if (fsync(fd) == -1) {
if (errno != EINVAL)
error2("fsync");
}
if (fclose(fp) == EOF)
error2("fclose");
_exit(0);
err2:
n = errno;
ftruncate(fd, sb.st_size);
errno = n;
err:
perror(msg);
_exit(1);
}
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