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/*
* Copyright (c) 2018 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/stat.h>
#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <netdb.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
static void mboxfile_engine(const char *sender, const char *filename);
int
main(int argc, char *argv[])
{
int ch;
char *sender = "<unknown>";
if (! geteuid())
errx(1, "mail.mboxfile: may not be executed as root");
while ((ch = getopt(argc, argv, "f:")) != -1) {
switch (ch) {
case 'f':
sender = optarg;
break;
default:
break;
}
}
argc -= optind;
argv += optind;
if (argc > 1)
errx(1, "mail.mboxfile: only one mboxfile is allowed");
mboxfile_engine(sender, argv[0]);
return (0);
}
static void
mboxfile_engine(const char *sender, const char *filename)
{
int fd;
FILE *fp;
char *line = NULL;
size_t linesize = 0;
ssize_t linelen;
time_t now;
time(&now);
fd = open(filename, O_CREAT | O_APPEND | O_WRONLY | O_EXLOCK, 0600);
if (fd < 0)
err(1, NULL);
if ((fp = fdopen(fd, "w")) == NULL)
err(1, NULL);
fprintf(fp, "From %s %s", sender, ctime(&now));
while ((linelen = getline(&line, &linesize, stdin)) != -1) {
line[strcspn(line, "\n")] = '\0';
if (strncmp(line, "From ", 5) == 0)
fprintf(fp, ">%s\n", line);
else
fprintf(fp, "%s\n", line);
}
fprintf(fp, "\n");
free(line);
if (ferror(stdin))
err(1, NULL);
if (fflush(fp) == EOF ||
ferror(fp) ||
fsync(fd) < 0 ||
fclose(fp) == EOF)
err(1, NULL);
}
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