зеркало из https://github.com/microsoft/git.git
328 строки
6.8 KiB
C
328 строки
6.8 KiB
C
/*
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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] [--keep-cr] -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;
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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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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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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 = xfdopen(fd, "w");
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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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}
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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(list, name);
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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 maildir_filename_cmp(const char *a, const char *b)
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{
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while (*a && *b) {
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if (isdigit(*a) && isdigit(*b)) {
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long int na, nb;
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na = strtol(a, (char **)&a, 10);
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nb = strtol(b, (char **)&b, 10);
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if (na != nb)
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return na - nb;
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/* strtol advanced our pointers */
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}
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else {
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if (*a != *b)
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return (unsigned char)*a - (unsigned char)*b;
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a++;
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b++;
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}
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}
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return (unsigned char)*a - (unsigned char)*b;
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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 = STRING_LIST_INIT_DUP;
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list.cmp = maildir_filename_cmp;
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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] == 'h' ) {
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usage(git_mailsplit_usage);
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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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