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/* $OpenBSD: delivery_filename.c,v 1.14 2015/12/28 19:47:57 millert Exp $ */ |
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/* |
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* Copyright (c) 2011 Gilles Chehade <gilles@poolp.org> |
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* |
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* Permission to use, copy, modify, and distribute this software for any |
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* purpose with or without fee is hereby granted, provided that the above |
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* copyright notice and this permission notice appear in all copies. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
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*/ |
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#include <sys/types.h> |
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#include <sys/queue.h> |
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#include <sys/tree.h> |
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#include <sys/socket.h> |
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#include <sys/stat.h> |
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#include <ctype.h> |
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#include <err.h> |
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#include <errno.h> |
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#include <event.h> |
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#include <fcntl.h> |
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#include <imsg.h> |
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#include <paths.h> |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <string.h> |
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#include <time.h> |
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#include <unistd.h> |
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#include <limits.h> |
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#include "smtpd.h" |
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#include "log.h" |
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extern char **environ; |
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/* filename backend */ |
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static void delivery_filename_open(struct deliver *); |
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struct delivery_backend delivery_backend_filename = { |
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0, delivery_filename_open |
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}; |
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static void |
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delivery_filename_open(struct deliver *deliver) |
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{ |
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struct stat sb; |
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size_t sz = 0; |
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ssize_t len; |
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int fd; |
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FILE *fp; |
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char *ln = NULL; |
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char *msg; |
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int n; |
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int escape_from; |
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#define error(m) { msg = m; goto err; } |
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#define error2(m) { msg = m; goto err2; } |
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setproctitle("file delivery"); |
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fd = open(deliver->to, O_CREAT | O_APPEND | O_WRONLY, 0600); |
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if (fd < 0) |
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error("open"); |
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if (fstat(fd, &sb) < 0) |
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error("fstat"); |
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if (S_ISREG(sb.st_mode) && flock(fd, LOCK_EX) < 0) |
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error("flock"); |
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fp = fdopen(fd, "a"); |
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if (fp == NULL) |
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error("fdopen"); |
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escape_from = 0; |
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while ((len = getline(&ln, &sz, stdin)) != -1) { |
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if (ln[len - 1] == '\n') |
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ln[len - 1] = '\0'; |
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if (strncmp(ln, "From ", 5) == 0) { |
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if (escape_from == 0) |
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escape_from = 1; |
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else |
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putc('>', fp); |
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} |
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fputs(ln, fp); |
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putc('\n', fp); |
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if (ferror(fp)) |
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break; |
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} |
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free(ln); |
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if (ferror(stdin)) |
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error2("read error"); |
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putc('\n', fp); |
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if (fflush(fp) == EOF || ferror(fp)) |
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error2("write error"); |
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if (fsync(fd) == -1) { |
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if (errno != EINVAL) |
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error2("fsync"); |
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} |
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if (fclose(fp) == EOF) |
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error2("fclose"); |
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_exit(0); |
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err2: |
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n = errno; |
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ftruncate(fd, sb.st_size); |
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errno = n; |
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err: |
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perror(msg); |
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_exit(1); |
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} |