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307 lines
6.3 KiB
307 lines
6.3 KiB
/* |
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* Totally braindamaged mbox splitter program. |
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* |
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* It just splits a mbox into a list of files: "0001" "0002" .. |
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* so you can process them further from there. |
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*/ |
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#include "cache.h" |
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#include "builtin.h" |
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#include "string-list.h" |
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#include "strbuf.h" |
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static const char git_mailsplit_usage[] = |
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"git mailsplit [-d<prec>] [-f<n>] [-b] -o<directory> [<mbox>|<Maildir>...]"; |
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static int is_from_line(const char *line, int len) |
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{ |
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const char *colon; |
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if (len < 20 || memcmp("From ", line, 5)) |
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return 0; |
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colon = line + len - 2; |
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line += 5; |
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for (;;) { |
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if (colon < line) |
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return 0; |
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if (*--colon == ':') |
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break; |
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} |
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if (!isdigit(colon[-4]) || |
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!isdigit(colon[-2]) || |
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!isdigit(colon[-1]) || |
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!isdigit(colon[ 1]) || |
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!isdigit(colon[ 2])) |
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return 0; |
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/* year */ |
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if (strtol(colon+3, NULL, 10) <= 90) |
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return 0; |
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/* Ok, close enough */ |
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return 1; |
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} |
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static struct strbuf buf = STRBUF_INIT; |
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static int keep_cr; |
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/* Called with the first line (potentially partial) |
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* already in buf[] -- normally that should begin with |
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* the Unix "From " line. Write it into the specified |
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* file. |
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*/ |
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static int split_one(FILE *mbox, const char *name, int allow_bare) |
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{ |
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FILE *output = NULL; |
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int fd; |
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int status = 0; |
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int is_bare = !is_from_line(buf.buf, buf.len); |
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if (is_bare && !allow_bare) |
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goto corrupt; |
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fd = open(name, O_WRONLY | O_CREAT | O_EXCL, 0666); |
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if (fd < 0) |
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die_errno("cannot open output file '%s'", name); |
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output = fdopen(fd, "w"); |
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|
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/* Copy it out, while searching for a line that begins with |
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* "From " and having something that looks like a date format. |
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*/ |
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for (;;) { |
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if (!keep_cr && buf.len > 1 && buf.buf[buf.len-1] == '\n' && |
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buf.buf[buf.len-2] == '\r') { |
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strbuf_setlen(&buf, buf.len-2); |
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strbuf_addch(&buf, '\n'); |
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} |
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if (fwrite(buf.buf, 1, buf.len, output) != buf.len) |
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die_errno("cannot write output"); |
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if (strbuf_getwholeline(&buf, mbox, '\n')) { |
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if (feof(mbox)) { |
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status = 1; |
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break; |
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} |
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die_errno("cannot read mbox"); |
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} |
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if (!is_bare && is_from_line(buf.buf, buf.len)) |
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break; /* done with one message */ |
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} |
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fclose(output); |
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return status; |
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corrupt: |
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if (output) |
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fclose(output); |
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unlink(name); |
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fprintf(stderr, "corrupt mailbox\n"); |
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exit(1); |
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} |
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static int populate_maildir_list(struct string_list *list, const char *path) |
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{ |
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DIR *dir; |
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struct dirent *dent; |
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char name[PATH_MAX]; |
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char *subs[] = { "cur", "new", NULL }; |
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char **sub; |
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for (sub = subs; *sub; ++sub) { |
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snprintf(name, sizeof(name), "%s/%s", path, *sub); |
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if ((dir = opendir(name)) == NULL) { |
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if (errno == ENOENT) |
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continue; |
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error("cannot opendir %s (%s)", name, strerror(errno)); |
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return -1; |
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} |
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while ((dent = readdir(dir)) != NULL) { |
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if (dent->d_name[0] == '.') |
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continue; |
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snprintf(name, sizeof(name), "%s/%s", *sub, dent->d_name); |
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string_list_insert(name, list); |
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} |
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closedir(dir); |
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} |
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return 0; |
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} |
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static int split_maildir(const char *maildir, const char *dir, |
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int nr_prec, int skip) |
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{ |
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char file[PATH_MAX]; |
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char name[PATH_MAX]; |
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int ret = -1; |
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int i; |
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struct string_list list = {NULL, 0, 0, 1}; |
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if (populate_maildir_list(&list, maildir) < 0) |
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goto out; |
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for (i = 0; i < list.nr; i++) { |
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FILE *f; |
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snprintf(file, sizeof(file), "%s/%s", maildir, list.items[i].string); |
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f = fopen(file, "r"); |
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if (!f) { |
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error("cannot open mail %s (%s)", file, strerror(errno)); |
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goto out; |
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} |
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if (strbuf_getwholeline(&buf, f, '\n')) { |
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error("cannot read mail %s (%s)", file, strerror(errno)); |
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goto out; |
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} |
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sprintf(name, "%s/%0*d", dir, nr_prec, ++skip); |
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split_one(f, name, 1); |
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fclose(f); |
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} |
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ret = skip; |
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out: |
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string_list_clear(&list, 1); |
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return ret; |
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} |
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static int split_mbox(const char *file, const char *dir, int allow_bare, |
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int nr_prec, int skip) |
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{ |
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char name[PATH_MAX]; |
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int ret = -1; |
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int peek; |
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FILE *f = !strcmp(file, "-") ? stdin : fopen(file, "r"); |
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int file_done = 0; |
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if (!f) { |
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error("cannot open mbox %s", file); |
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goto out; |
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} |
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do { |
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peek = fgetc(f); |
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} while (isspace(peek)); |
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ungetc(peek, f); |
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if (strbuf_getwholeline(&buf, f, '\n')) { |
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/* empty stdin is OK */ |
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if (f != stdin) { |
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error("cannot read mbox %s", file); |
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goto out; |
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} |
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file_done = 1; |
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} |
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while (!file_done) { |
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sprintf(name, "%s/%0*d", dir, nr_prec, ++skip); |
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file_done = split_one(f, name, allow_bare); |
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} |
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if (f != stdin) |
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fclose(f); |
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ret = skip; |
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out: |
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return ret; |
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} |
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int cmd_mailsplit(int argc, const char **argv, const char *prefix) |
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{ |
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int nr = 0, nr_prec = 4, num = 0; |
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int allow_bare = 0; |
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const char *dir = NULL; |
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const char **argp; |
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static const char *stdin_only[] = { "-", NULL }; |
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for (argp = argv+1; *argp; argp++) { |
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const char *arg = *argp; |
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if (arg[0] != '-') |
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break; |
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/* do flags here */ |
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if ( arg[1] == 'd' ) { |
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nr_prec = strtol(arg+2, NULL, 10); |
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if (nr_prec < 3 || 10 <= nr_prec) |
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usage(git_mailsplit_usage); |
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continue; |
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} else if ( arg[1] == 'f' ) { |
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nr = strtol(arg+2, NULL, 10); |
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} else if ( arg[1] == 'b' && !arg[2] ) { |
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allow_bare = 1; |
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} else if (!strcmp(arg, "--keep-cr")) { |
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keep_cr = 1; |
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} else if ( arg[1] == 'o' && arg[2] ) { |
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dir = arg+2; |
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} else if ( arg[1] == '-' && !arg[2] ) { |
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argp++; /* -- marks end of options */ |
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break; |
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} else { |
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die("unknown option: %s", arg); |
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} |
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} |
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if ( !dir ) { |
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/* Backwards compatibility: if no -o specified, accept |
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<mbox> <dir> or just <dir> */ |
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switch (argc - (argp-argv)) { |
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case 1: |
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dir = argp[0]; |
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argp = stdin_only; |
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break; |
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case 2: |
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stdin_only[0] = argp[0]; |
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dir = argp[1]; |
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argp = stdin_only; |
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break; |
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default: |
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usage(git_mailsplit_usage); |
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} |
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} else { |
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/* New usage: if no more argument, parse stdin */ |
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if ( !*argp ) |
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argp = stdin_only; |
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} |
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while (*argp) { |
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const char *arg = *argp++; |
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struct stat argstat; |
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int ret = 0; |
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if (arg[0] == '-' && arg[1] == 0) { |
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ret = split_mbox(arg, dir, allow_bare, nr_prec, nr); |
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if (ret < 0) { |
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error("cannot split patches from stdin"); |
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return 1; |
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} |
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num += (ret - nr); |
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nr = ret; |
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continue; |
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} |
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if (stat(arg, &argstat) == -1) { |
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error("cannot stat %s (%s)", arg, strerror(errno)); |
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return 1; |
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} |
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if (S_ISDIR(argstat.st_mode)) |
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ret = split_maildir(arg, dir, nr_prec, nr); |
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else |
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ret = split_mbox(arg, dir, allow_bare, nr_prec, nr); |
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if (ret < 0) { |
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error("cannot split patches from %s", arg); |
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return 1; |
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} |
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num += (ret - nr); |
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nr = ret; |
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} |
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printf("%d\n", num); |
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return 0; |
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}
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