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371 lines
7.1 KiB
C
371 lines
7.1 KiB
C
#include <sys/stat.h>
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#include <sys/time.h>
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#include <sys/types.h>
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#include <dirent.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <limits.h>
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#include <search.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 <strings.h>
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#include <unistd.h>
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#include "blaze822.h"
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#include "xpledge.h"
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/*
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design rationale:
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- only MBOX-RD because it's the only reasonable lossless encoding, and decodes
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MBOX-O fine
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- date from Date: since From lines are usually crap
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- proper maildir delivery because it's not that hard
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- no creation of maildirs, should be a separate tool
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*/
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static int cflag;
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static int kflag;
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static int Mflag;
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static int vflag;
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static char *Xflag;
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char *targetdir;
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long delivery;
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int preserve_mtime;
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int try_rename;
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char host[64];
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void
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gethost() {
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gethostname(host, sizeof host);
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// termination not posix guaranteed
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host[sizeof host - 1] = 0;
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// replace / and : with -
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char *s;
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for (s = host; *s; s++)
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if (*s == '/' || *s == ':')
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*s = '-';
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}
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int
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deliver(char *infilename)
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{
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int outfd;
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FILE *infile;
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FILE *outfile;
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char dst[PATH_MAX];
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char tmp[PATH_MAX];
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char id[128];
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struct timeval tv;
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char *line = 0;
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size_t linelen = 0;
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if (infilename) {
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if (try_rename) {
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infile = 0;
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} else {
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infile = fopen(infilename, "r");
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if (!infile) {
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fprintf(stderr, "mrefile: %s: %s\n",
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infilename, strerror(errno));
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return -1;
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}
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}
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} else {
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// mdeliver
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infile = stdin;
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}
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if (Mflag) {
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// skip to first "From " line
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while (1) {
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errno = 0;
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ssize_t rd = getdelim(&line, &linelen, '\n', infile);
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if (rd == -1) {
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if (errno == 0)
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errno = EINVAL; // invalid mbox file
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goto fail;
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}
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if (strncmp("From ", line, 5) == 0)
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break;
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}
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}
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do {
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delivery++;
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try_again:
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gettimeofday(&tv, 0);
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snprintf(id, sizeof id, "%ld.M%06ldP%ldQ%ld.%s",
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(long)tv.tv_sec, (long)tv.tv_usec, (long)getpid(),
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delivery, host);
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snprintf(tmp, sizeof tmp, "%s/tmp/%s", targetdir, id);
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if (try_rename) {
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snprintf(dst, sizeof dst, "%s/%s/%s:2,%s",
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targetdir, cflag ? "cur" : "new", id, Xflag);
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if (rename(infilename, dst) == 0)
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goto success;
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/* rename failed, open file and try copying */
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infile = fopen(infilename, "r");
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if (!infile) {
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fprintf(stderr, "mrefile: %s: %s\n",
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infilename, strerror(errno));
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return -1;
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}
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}
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struct stat st;
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if (fstat(fileno(infile), &st) < 0)
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st.st_mode = 0600;
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if (S_ISFIFO(st.st_mode))
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st.st_mode = 0600;
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outfd = open(tmp, O_CREAT | O_WRONLY | O_EXCL,
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st.st_mode & 07777);
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if (outfd < 0) {
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if (errno == EEXIST)
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goto try_again;
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if (errno == ENOENT)
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fprintf(stderr, "mrefile: %s/tmp: %s\n",
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targetdir, strerror(errno));
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else
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fprintf(stderr, "mrefile: %s: %s\n",
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tmp, strerror(errno));
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goto fail;
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}
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outfile = fdopen(outfd, "w");
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char statusflags[5] = { 0 };
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int in_header = 1;
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int is_old = 0;
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int prev_line_empty = 0;
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int this_line_empty = 0; // only for mbox parsing
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while (1) {
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errno = 0;
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ssize_t rd = getdelim(&line, &linelen, '\n', infile);
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if (rd == -1) {
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if (errno != 0)
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goto fail;
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break;
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}
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char *line_start = line;
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if (line[0] == '\n' && (!line[1] ||
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(line[1] == '\r' && !line[2]))) {
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this_line_empty = Mflag ? 1 : 0;
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in_header = 0;
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} else {
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this_line_empty = 0;
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}
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if (Mflag && strncmp("From ", line, 5) == 0)
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break;
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if (Mflag && in_header &&
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(strncasecmp("status:", line, 7) == 0 ||
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strncasecmp("x-status:", line, 9) == 0)) {
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char *v = strchr(line, ':');
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if (v) {
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if (strchr(v, 'F')) statusflags[0] = 'F';
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if (strchr(v, 'A')) statusflags[1] = 'R';
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if (strchr(v, 'R')) statusflags[2] = 'S';
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if (strchr(v, 'D')) statusflags[3] = 'T';
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if (strchr(v, 'O')) is_old = 1;
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}
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continue; // drop header
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}
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if (Mflag) {
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// MBOXRD: strip first > from >>..>>From
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char *s = line;
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while (*s == '>')
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s++;
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if (strncmp("From ", s, 5) == 0) {
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line_start++;
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rd--;
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}
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}
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// print delayed empty line
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if (prev_line_empty)
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if (fputc('\n', outfile) == EOF)
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goto fail;
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if (!this_line_empty)
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if (fwrite(line_start, 1, rd, outfile) != (size_t)rd)
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goto fail;
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prev_line_empty = this_line_empty;
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}
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if (fflush(outfile) == EOF)
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goto fail;
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if (fsync(outfd) < 0)
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goto fail;
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if (fclose(outfile) == EOF)
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goto fail;
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// compress flags
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int i, j;
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for (i = sizeof statusflags - 1; i >= 0; i--)
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if (!statusflags[i])
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for (j = i+1; j < (int)sizeof statusflags; j++)
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statusflags[j-1] = statusflags[j];
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if (Mflag) {
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struct message *msg = blaze822_file(tmp);
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time_t date = -1;
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char *v;
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if (msg && (v = blaze822_hdr(msg, "date"))) {
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date = blaze822_date(v);
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if (date != -1) {
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const struct timeval times[2] = {
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{ tv.tv_sec, tv.tv_usec },
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{ date, 0 }
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};
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utimes(tmp, times);
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}
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}
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blaze822_free(msg);
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}
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if (preserve_mtime) {
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#if defined(AT_FDCWD) && defined(UTIME_NOW) && defined(UTIME_OMIT)
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const struct timespec times[2] = {
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{ tv.tv_sec, tv.tv_usec * 1000L },
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#if (defined(__APPLE__) && defined(__MACH__))
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st.st_mtimespec
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#else /* POSIX.1-2008 */
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st.st_mtim
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#endif
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};
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utimensat(AT_FDCWD, tmp, times, 0);
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#else
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const struct timeval times[2] = {
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tv,
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{ st.st_mtime, 0 }
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};
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utimes(tmp, times);
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#endif
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}
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snprintf(dst, sizeof dst, "%s/%s/%s:2,%s",
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targetdir, (cflag || is_old) ? "cur" : "new", id,
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Xflag ? Xflag : statusflags);
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if (rename(tmp, dst) != 0)
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goto fail;
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success:
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if (vflag)
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printf("%s\n", dst);
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} while (Mflag && !feof(infile));
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if (infile)
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fclose(infile);
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return 0;
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fail:
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if (infile)
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fclose(infile);
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return -1;
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}
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void
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refile(char *file)
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{
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while (*file == ' ' || *file == '\t')
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file++;
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// keep flags
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char *flags = strstr(file, ":2,");
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if (flags)
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Xflag = flags + 3;
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else
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Xflag = "";
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if (deliver(file) < 0) {
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perror("mrefile");
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return;
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}
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if (!kflag && !try_rename)
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unlink(file);
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}
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int
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main(int argc, char *argv[])
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{
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if (strchr(argv[0], 'f')) {
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// mrefile(1)
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cflag = 1; // use cur/
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preserve_mtime = 1;
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try_rename = 1;
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int c;
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while ((c = getopt(argc, argv, "kv")) != -1)
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switch (c) {
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case 'k': kflag = 1; try_rename = 0; break;
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case 'v': vflag = 1; break;
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default:
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usage:
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fprintf(stderr,
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"Usage: mrefile [-kv] [msgs...] maildir\n");
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exit(1);
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}
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if (argc == optind)
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goto usage;
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targetdir = argv[argc - 1];
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gethost();
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if (argc == optind + 1 && isatty(0))
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goto usage;
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else
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blaze822_loop(argc - 1 - optind, argv + optind, refile);
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return 0;
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}
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int c;
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while ((c = getopt(argc, argv, "cMvX:")) != -1)
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switch (c) {
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case 'c': cflag = 1; break;
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case 'M': Mflag = 1; break;
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case 'v': vflag = 1; break;
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case 'X': Xflag = optarg; break;
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default:
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usage2:
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fprintf(stderr,
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"Usage: mdeliver [-c] [-v] [-X flags] dir < message\n"
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" mdeliver -M [-c] [-v] [-X flags] dir < mbox\n"
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);
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exit(1);
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}
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if (argc != optind+1)
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goto usage2;
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xpledge("stdio rpath wpath cpath", "");
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targetdir = argv[optind];
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gethost();
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if (deliver(0) < 0) {
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perror("mdeliver");
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return 2;
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}
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return 0;
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}
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