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#include <sys/time.h>
#include <sys/types.h>
#include <dirent.h>
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <search.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "blaze822.h"
/*
design rationale:
- only MBOX-RD because it's the only reasonable lossless encoding, and decodes
MBOX-O fine
- date from Date: since From lines are usually crap
- proper maildir delivery because it's not that hard
- no creation of maildirs, should be a separate tool
*/
static int cflag;
static int Mflag;
static int vflag;
static char *Xflag;
char *targetdir;
long delivery;
char host[64];
void
gethost() {
gethostname(host, sizeof host);
// termination not posix guaranteed
host[sizeof host - 1] = 0;
// replace / and : with -
char *s;
for (s = host; *s; s++)
if (*s == '/' || *s == ':')
*s = '-';
}
int
deliver(FILE *infile)
{
int outfd;
FILE *outfile;
char dst[PATH_MAX];
char tmp[PATH_MAX];
char id[128];
struct timeval tv;
char *line = 0;
size_t linelen = 0;
if (Mflag) {
// skip to first "From " line
while (1) {
errno = 0;
ssize_t rd = getdelim(&line, &linelen, '\n', infile);
if (rd == -1) {
if (errno == 0)
// invalid mbox file
errno = EINVAL;
return -1;
}
if (strncmp("From ", line, 5) == 0)
break;
}
}
while (!feof(infile)) {
delivery++;
tryagain:
gettimeofday(&tv, 0);
snprintf(id, sizeof id, "%ld.M%06ldP%ldQ%ld.%s",
tv.tv_sec, tv.tv_usec, (long)getpid(), delivery, host);
snprintf(tmp, sizeof tmp, "%s/tmp/%s", targetdir, id);
outfd = open(tmp, O_CREAT | O_WRONLY | O_EXCL, 0666);
if (outfd < 0) {
if (errno == EEXIST)
goto tryagain;
return -1;
}
outfile = fdopen(outfd, "w");
char statusflags[5] = { 0 };
int in_header = 1;
int is_old = 0;
while (1) {
errno = 0;
ssize_t rd = getdelim(&line, &linelen, '\n', infile);
if (rd == -1) {
if (errno != 0)
return -1;
break;
}
if (line[0] == '\n' && !line[1])
in_header = 0;
if (Mflag && strncmp("From ", line, 5) == 0)
break;
if (Mflag && in_header &&
(strncasecmp("status:", line, 6) == 0 ||
strncasecmp("x-status:", line, 8) == 0)) {
char *v = strchr(line, ':');
if (strchr(v, 'F')) statusflags[0] = 'F';
if (strchr(v, 'A')) statusflags[1] = 'R';
if (strchr(v, 'R')) statusflags[2] = 'S';
if (strchr(v, 'D')) statusflags[3] = 'T';
if (strchr(v, 'O')) is_old = 1;
continue; // drop header
}
if (Mflag) {
// MBOXRD: strip first > from >>..>>From
char *s = line;
while (*s == '>')
s++;
if (strncmp("From ", s, 5) == 0) {
line++;
rd--;
}
}
if (fwrite(line, 1, rd, outfile) != (size_t)rd)
return -1;
}
if (fflush(outfile) == EOF)
return -1;
if (fsync(outfd) < 0)
return -1;
if (fclose(outfile) == EOF)
return -1;
// compress flags
int i, j;
for (i = sizeof statusflags - 1; i >= 0; i--)
if (!statusflags[i])
for (j = i+1; j < (int) sizeof statusflags; j++)
statusflags[j-1] = statusflags[j];
if (Mflag) {
struct message *msg = blaze822_file(tmp);
time_t date = -1;
char *v;
if (msg && (v = blaze822_hdr(msg, "date"))) {
date = blaze822_date(v);
if (date != -1) {
const struct timeval times[2] = {
{ tv.tv_sec, tv.tv_usec },
{ date, 0 }
};
utimes(tmp, times);
}
}
}
snprintf(dst, sizeof dst, "%s/%s/%s:2,%s",
targetdir, (cflag || is_old) ? "cur" : "new", id,
Xflag ? Xflag : statusflags);
if (rename(tmp, dst) != 0)
return -1;
if (vflag)
printf("%s\n", dst);
}
return 0;
}
int
main(int argc, char *argv[])
{
int c;
while ((c = getopt(argc, argv, "cMvX:")) != -1)
switch(c) {
case 'c': cflag = 1; break;
case 'M': Mflag = 1; break;
case 'v': vflag = 1; break;
case 'X': Xflag = optarg; break;
default:
fprintf(stderr,
"Usage: mdeliver [-c] [-v] [-X flags] dir < message\n"
" mdeliver -M [-c] [-v] [-X flags] dir < mbox\n"
);
exit(1);
}
if (argc != optind+1) {
fprintf(stderr, "usage: mdeliver DIR\n");
return 1;
}
targetdir = argv[optind];
gethost();
if (deliver(stdin) < 0) {
perror("mdeliver");
return 2;
}
return 0;
}
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