2 * Totally braindamaged mbox splitter program.
4 * It just splits a mbox into a list of files: "0001" "0002" ..
5 * so you can process them further from there.
11 static const char git_mailsplit_usage[] =
12 "git-mailsplit [-d<prec>] [-f<n>] [-b] -o<directory> <mbox>|<Maildir>...";
14 static int is_from_line(const char *line, int len)
18 if (len < 20 || memcmp("From ", line, 5))
21 colon = line + len - 2;
30 if (!isdigit(colon[-4]) ||
31 !isdigit(colon[-2]) ||
32 !isdigit(colon[-1]) ||
33 !isdigit(colon[ 1]) ||
38 if (strtol(colon+3, NULL, 10) <= 90)
41 /* Ok, close enough */
45 /* Could be as small as 64, enough to hold a Unix "From " line. */
46 static char buf[4096];
48 /* Called with the first line (potentially partial)
49 * already in buf[] -- normally that should begin with
50 * the Unix "From " line. Write it into the specified
53 static int split_one(FILE *mbox, const char *name, int allow_bare)
56 int len = strlen(buf);
59 int is_bare = !is_from_line(buf, len);
61 if (is_bare && !allow_bare)
64 fd = open(name, O_WRONLY | O_CREAT | O_EXCL, 0666);
66 die("cannot open output file %s", name);
67 output = fdopen(fd, "w");
69 /* Copy it out, while searching for a line that begins with
70 * "From " and having something that looks like a date format.
73 int is_partial = (buf[len-1] != '\n');
75 if (fputs(buf, output) == EOF)
76 die("cannot write output");
78 if (fgets(buf, sizeof(buf), mbox) == NULL) {
83 die("cannot read mbox");
86 if (!is_partial && !is_bare && is_from_line(buf, len))
87 break; /* done with one message */
96 fprintf(stderr, "corrupt mailbox\n");
100 static int populate_maildir_list(struct path_list *list, const char *path)
105 if ((dir = opendir(path)) == NULL) {
106 error("cannot opendir %s (%s)", path, strerror(errno));
110 while ((dent = readdir(dir)) != NULL) {
111 if (dent->d_name[0] == '.')
113 path_list_insert(dent->d_name, list);
121 static int split_maildir(const char *maildir, const char *dir,
122 int nr_prec, int skip)
125 char curdir[PATH_MAX];
129 struct path_list list = {NULL, 0, 0, 1};
131 snprintf(curdir, sizeof(curdir), "%s/cur", maildir);
132 if (populate_maildir_list(&list, curdir) < 0)
135 for (i = 0; i < list.nr; i++) {
137 snprintf(file, sizeof(file), "%s/%s", curdir, list.items[i].path);
138 f = fopen(file, "r");
140 error("cannot open mail %s (%s)", file, strerror(errno));
144 if (fgets(buf, sizeof(buf), f) == NULL) {
145 error("cannot read mail %s (%s)", file, strerror(errno));
149 sprintf(name, "%s/%0*d", dir, nr_prec, ++skip);
150 split_one(f, name, 1);
155 path_list_clear(&list, 1);
162 static int split_mbox(const char *file, const char *dir, int allow_bare,
163 int nr_prec, int skip)
168 FILE *f = !strcmp(file, "-") ? stdin : fopen(file, "r");
172 error("cannot open mbox %s", file);
176 if (fgets(buf, sizeof(buf), f) == NULL) {
177 /* empty stdin is OK */
179 error("cannot read mbox %s", file);
186 sprintf(name, "%s/%0*d", dir, nr_prec, ++skip);
187 file_done = split_one(f, name, allow_bare);
198 int cmd_mailsplit(int argc, const char **argv, const char *prefix)
200 int nr = 0, nr_prec = 4, num = 0;
202 const char *dir = NULL;
204 static const char *stdin_only[] = { "-", NULL };
206 for (argp = argv+1; *argp; argp++) {
207 const char *arg = *argp;
212 if ( arg[1] == 'd' ) {
213 nr_prec = strtol(arg+2, NULL, 10);
214 if (nr_prec < 3 || 10 <= nr_prec)
215 usage(git_mailsplit_usage);
217 } else if ( arg[1] == 'f' ) {
218 nr = strtol(arg+2, NULL, 10);
219 } else if ( arg[1] == 'b' && !arg[2] ) {
221 } else if ( arg[1] == 'o' && arg[2] ) {
223 } else if ( arg[1] == '-' && !arg[2] ) {
224 argp++; /* -- marks end of options */
227 die("unknown option: %s", arg);
232 /* Backwards compatibility: if no -o specified, accept
233 <mbox> <dir> or just <dir> */
234 switch (argc - (argp-argv)) {
240 stdin_only[0] = argp[0];
245 usage(git_mailsplit_usage);
248 /* New usage: if no more argument, parse stdin */
254 const char *arg = *argp++;
258 if (arg[0] == '-' && arg[1] == 0) {
259 ret = split_mbox(arg, dir, allow_bare, nr_prec, nr);
261 error("cannot split patches from stdin");
269 if (stat(arg, &argstat) == -1) {
270 error("cannot stat %s (%s)", arg, strerror(errno));
274 if (S_ISDIR(argstat.st_mode))
275 ret = split_maildir(arg, dir, nr_prec, nr);
277 ret = split_mbox(arg, dir, allow_bare, nr_prec, nr);
280 error("cannot split patches from %s", arg);