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.
9 #include "string-list.h"
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 /* We cannot use fgets() because our lines can contain NULs */
49 int read_line_with_nul(char *buf, int size, FILE *in)
58 if (c == '\n' || len + 1 >= size)
66 /* Called with the first line (potentially partial)
67 * already in buf[] -- normally that should begin with
68 * the Unix "From " line. Write it into the specified
71 static int split_one(FILE *mbox, const char *name, int allow_bare)
74 int len = strlen(buf);
77 int is_bare = !is_from_line(buf, len);
79 if (is_bare && !allow_bare)
82 fd = open(name, O_WRONLY | O_CREAT | O_EXCL, 0666);
84 die("cannot open output file %s", name);
85 output = fdopen(fd, "w");
87 /* Copy it out, while searching for a line that begins with
88 * "From " and having something that looks like a date format.
91 int is_partial = len && buf[len-1] != '\n';
93 if (fwrite(buf, 1, len, output) != len)
94 die("cannot write output");
96 len = read_line_with_nul(buf, sizeof(buf), mbox);
102 die("cannot read mbox");
104 if (!is_partial && !is_bare && is_from_line(buf, len))
105 break; /* done with one message */
114 fprintf(stderr, "corrupt mailbox\n");
118 static int populate_maildir_list(struct string_list *list, const char *path)
123 char *subs[] = { "cur", "new", NULL };
126 for (sub = subs; *sub; ++sub) {
127 snprintf(name, sizeof(name), "%s/%s", path, *sub);
128 if ((dir = opendir(name)) == NULL) {
131 error("cannot opendir %s (%s)", name, strerror(errno));
135 while ((dent = readdir(dir)) != NULL) {
136 if (dent->d_name[0] == '.')
138 snprintf(name, sizeof(name), "%s/%s", *sub, dent->d_name);
139 string_list_insert(name, list);
148 static int split_maildir(const char *maildir, const char *dir,
149 int nr_prec, int skip)
155 struct string_list list = {NULL, 0, 0, 1};
157 if (populate_maildir_list(&list, maildir) < 0)
160 for (i = 0; i < list.nr; i++) {
162 snprintf(file, sizeof(file), "%s/%s", maildir, list.items[i].string);
163 f = fopen(file, "r");
165 error("cannot open mail %s (%s)", file, strerror(errno));
169 if (fgets(buf, sizeof(buf), f) == NULL) {
170 error("cannot read mail %s (%s)", file, strerror(errno));
174 sprintf(name, "%s/%0*d", dir, nr_prec, ++skip);
175 split_one(f, name, 1);
182 string_list_clear(&list, 1);
186 static int split_mbox(const char *file, const char *dir, int allow_bare,
187 int nr_prec, int skip)
193 FILE *f = !strcmp(file, "-") ? stdin : fopen(file, "r");
197 error("cannot open mbox %s", file);
203 } while (isspace(peek));
206 if (fgets(buf, sizeof(buf), f) == NULL) {
207 /* empty stdin is OK */
209 error("cannot read mbox %s", file);
216 sprintf(name, "%s/%0*d", dir, nr_prec, ++skip);
217 file_done = split_one(f, name, allow_bare);
228 int cmd_mailsplit(int argc, const char **argv, const char *prefix)
230 int nr = 0, nr_prec = 4, num = 0;
232 const char *dir = NULL;
234 static const char *stdin_only[] = { "-", NULL };
236 for (argp = argv+1; *argp; argp++) {
237 const char *arg = *argp;
242 if ( arg[1] == 'd' ) {
243 nr_prec = strtol(arg+2, NULL, 10);
244 if (nr_prec < 3 || 10 <= nr_prec)
245 usage(git_mailsplit_usage);
247 } else if ( arg[1] == 'f' ) {
248 nr = strtol(arg+2, NULL, 10);
249 } else if ( arg[1] == 'b' && !arg[2] ) {
251 } else if ( arg[1] == 'o' && arg[2] ) {
253 } else if ( arg[1] == '-' && !arg[2] ) {
254 argp++; /* -- marks end of options */
257 die("unknown option: %s", arg);
262 /* Backwards compatibility: if no -o specified, accept
263 <mbox> <dir> or just <dir> */
264 switch (argc - (argp-argv)) {
270 stdin_only[0] = argp[0];
275 usage(git_mailsplit_usage);
278 /* New usage: if no more argument, parse stdin */
284 const char *arg = *argp++;
288 if (arg[0] == '-' && arg[1] == 0) {
289 ret = split_mbox(arg, dir, allow_bare, nr_prec, nr);
291 error("cannot split patches from stdin");
299 if (stat(arg, &argstat) == -1) {
300 error("cannot stat %s (%s)", arg, strerror(errno));
304 if (S_ISDIR(argstat.st_mode))
305 ret = split_maildir(arg, dir, nr_prec, nr);
307 ret = split_mbox(arg, dir, allow_bare, nr_prec, nr);
310 error("cannot split patches from %s", arg);