freshlybakedca.ke
Git fork
1/*
2 * Totally braindamaged mbox splitter program.
3 *
4 * It just splits a mbox into a list of files: "0001" "0002" ..
5 * so you can process them further from there.
6 */
7
8#define DISABLE_SIGN_COMPARE_WARNINGS
9
10#include "builtin.h"
11#include "gettext.h"
12#include "string-list.h"
13#include "strbuf.h"
14
15static const char git_mailsplit_usage[] =
16"git mailsplit [-d<prec>] [-f<n>] [-b] [--keep-cr] -o<directory> [(<mbox>|<Maildir>)...]";
17
18static int is_from_line(const char *line, int len)
19{
20 const char *colon;
21
22 if (len < 20 || memcmp("From ", line, 5))
23 return 0;
24
25 colon = line + len - 2;
26 line += 5;
27 for (;;) {
28 if (colon < line)
29 return 0;
30 if (*--colon == ':')
31 break;
32 }
33
34 if (!isdigit(colon[-4]) ||
35 !isdigit(colon[-2]) ||
36 !isdigit(colon[-1]) ||
37 !isdigit(colon[ 1]) ||
38 !isdigit(colon[ 2]))
39 return 0;
40
41 /* year */
42 if (strtol(colon+3, NULL, 10) <= 90)
43 return 0;
44
45 /* Ok, close enough */
46 return 1;
47}
48
49static struct strbuf buf = STRBUF_INIT;
50static int keep_cr;
51static int mboxrd;
52
53static int is_gtfrom(const struct strbuf *buf)
54{
55 size_t min = strlen(">From ");
56 size_t ngt;
57
58 if (buf->len < min)
59 return 0;
60
61 ngt = strspn(buf->buf, ">");
62 return ngt && starts_with(buf->buf + ngt, "From ");
63}
64
65/* Called with the first line (potentially partial)
66 * already in buf[] -- normally that should begin with
67 * the Unix "From " line. Write it into the specified
68 * file.
69 */
70static int split_one(FILE *mbox, const char *name, int allow_bare)
71{
72 FILE *output;
73 int fd;
74 int status = 0;
75 int is_bare = !is_from_line(buf.buf, buf.len);
76
77 if (is_bare && !allow_bare) {
78 fprintf(stderr, "corrupt mailbox\n");
79 exit(1);
80 }
81 fd = xopen(name, O_WRONLY | O_CREAT | O_EXCL, 0666);
82 output = xfdopen(fd, "w");
83
84 /* Copy it out, while searching for a line that begins with
85 * "From " and having something that looks like a date format.
86 */
87 for (;;) {
88 if (!keep_cr && buf.len > 1 && buf.buf[buf.len-1] == '\n' &&
89 buf.buf[buf.len-2] == '\r') {
90 strbuf_setlen(&buf, buf.len-2);
91 strbuf_addch(&buf, '\n');
92 }
93
94 if (mboxrd && is_gtfrom(&buf))
95 strbuf_remove(&buf, 0, 1);
96
97 if (fwrite(buf.buf, 1, buf.len, output) != buf.len)
98 die_errno("cannot write output");
99
100 if (strbuf_getwholeline(&buf, mbox, '\n')) {
101 if (feof(mbox)) {
102 status = 1;
103 break;
104 }
105 die_errno("cannot read mbox");
106 }
107 if (!is_bare && is_from_line(buf.buf, buf.len))
108 break; /* done with one message */
109 }
110 fclose(output);
111 return status;
112}
113
114static int populate_maildir_list(struct string_list *list, const char *path)
115{
116 DIR *dir;
117 struct dirent *dent;
118 char *name = NULL;
119 const char *subs[] = { "cur", "new", NULL };
120 const char **sub;
121 int ret = -1;
122
123 for (sub = subs; *sub; ++sub) {
124 free(name);
125 name = xstrfmt("%s/%s", path, *sub);
126 if (!(dir = opendir(name))) {
127 if (errno == ENOENT)
128 continue;
129 error_errno("cannot opendir %s", name);
130 goto out;
131 }
132
133 while ((dent = readdir(dir)) != NULL) {
134 if (dent->d_name[0] == '.')
135 continue;
136 free(name);
137 name = xstrfmt("%s/%s", *sub, dent->d_name);
138 string_list_insert(list, name);
139 }
140
141 closedir(dir);
142 }
143
144 ret = 0;
145
146out:
147 free(name);
148 return ret;
149}
150
151static int maildir_filename_cmp(const char *a, const char *b)
152{
153 while (*a && *b) {
154 if (isdigit(*a) && isdigit(*b)) {
155 long int na, nb;
156 na = strtol(a, (char **)&a, 10);
157 nb = strtol(b, (char **)&b, 10);
158 if (na != nb)
159 return na - nb;
160 /* strtol advanced our pointers */
161 }
162 else {
163 if (*a != *b)
164 return (unsigned char)*a - (unsigned char)*b;
165 a++;
166 b++;
167 }
168 }
169 return (unsigned char)*a - (unsigned char)*b;
170}
171
172static int split_maildir(const char *maildir, const char *dir,
173 int nr_prec, int skip)
174{
175 char *file = NULL;
176 FILE *f = NULL;
177 int ret = -1;
178 struct string_list list = STRING_LIST_INIT_DUP;
179
180 list.cmp = maildir_filename_cmp;
181
182 if (populate_maildir_list(&list, maildir) < 0)
183 goto out;
184
185 for (size_t i = 0; i < list.nr; i++) {
186 char *name;
187
188 free(file);
189 file = xstrfmt("%s/%s", maildir, list.items[i].string);
190
191 f = fopen(file, "r");
192 if (!f) {
193 error_errno("cannot open mail %s", file);
194 goto out;
195 }
196
197 if (strbuf_getwholeline(&buf, f, '\n')) {
198 error_errno("cannot read mail %s", file);
199 goto out;
200 }
201
202 name = xstrfmt("%s/%0*d", dir, nr_prec, ++skip);
203 split_one(f, name, 1);
204 free(name);
205
206 fclose(f);
207 f = NULL;
208 }
209
210 ret = skip;
211out:
212 if (f)
213 fclose(f);
214 free(file);
215 string_list_clear(&list, 1);
216 return ret;
217}
218
219static int split_mbox(const char *file, const char *dir, int allow_bare,
220 int nr_prec, int skip)
221{
222 int ret = -1;
223 int peek;
224
225 FILE *f = !strcmp(file, "-") ? stdin : fopen(file, "r");
226 int file_done = 0;
227
228 if (isatty(fileno(f)))
229 warning(_("reading patches from stdin/tty..."));
230
231 if (!f) {
232 error_errno("cannot open mbox %s", file);
233 goto out;
234 }
235
236 do {
237 peek = fgetc(f);
238 if (peek == EOF) {
239 if (f == stdin)
240 /* empty stdin is OK */
241 ret = skip;
242 else {
243 fclose(f);
244 error(_("empty mbox: '%s'"), file);
245 }
246 goto out;
247 }
248 } while (isspace(peek));
249 ungetc(peek, f);
250
251 if (strbuf_getwholeline(&buf, f, '\n')) {
252 /* empty stdin is OK */
253 if (f != stdin) {
254 error("cannot read mbox %s", file);
255 goto out;
256 }
257 file_done = 1;
258 }
259
260 while (!file_done) {
261 char *name = xstrfmt("%s/%0*d", dir, nr_prec, ++skip);
262 file_done = split_one(f, name, allow_bare);
263 free(name);
264 }
265
266 if (f != stdin)
267 fclose(f);
268
269 ret = skip;
270out:
271 return ret;
272}
273
274int cmd_mailsplit(int argc,
275 const char **argv,
276 const char *prefix,
277 struct repository *repo UNUSED)
278{
279 int nr = 0, nr_prec = 4, num = 0;
280 int allow_bare = 0;
281 const char *dir = NULL;
282 const char **argp;
283 static const char *stdin_only[] = { "-", NULL };
284
285 BUG_ON_NON_EMPTY_PREFIX(prefix);
286
287 show_usage_if_asked(argc, argv, git_mailsplit_usage);
288
289 for (argp = argv+1; *argp; argp++) {
290 const char *arg = *argp;
291
292 if (arg[0] != '-')
293 break;
294 /* do flags here */
295 if ( arg[1] == 'd' ) {
296 nr_prec = strtol(arg+2, NULL, 10);
297 if (nr_prec < 3 || 10 <= nr_prec)
298 usage(git_mailsplit_usage);
299 continue;
300 } else if ( arg[1] == 'f' ) {
301 nr = strtol(arg+2, NULL, 10);
302 } else if ( arg[1] == 'b' && !arg[2] ) {
303 allow_bare = 1;
304 } else if (!strcmp(arg, "--keep-cr")) {
305 keep_cr = 1;
306 } else if ( arg[1] == 'o' && arg[2] ) {
307 dir = arg+2;
308 } else if (!strcmp(arg, "--mboxrd")) {
309 mboxrd = 1;
310 } else if ( arg[1] == '-' && !arg[2] ) {
311 argp++; /* -- marks end of options */
312 break;
313 } else {
314 die("unknown option: %s", arg);
315 }
316 }
317
318 if ( !dir ) {
319 /* Backwards compatibility: if no -o specified, accept
320 <mbox> <dir> or just <dir> */
321 switch (argc - (argp-argv)) {
322 case 1:
323 dir = argp[0];
324 argp = stdin_only;
325 break;
326 case 2:
327 stdin_only[0] = argp[0];
328 dir = argp[1];
329 argp = stdin_only;
330 break;
331 default:
332 usage(git_mailsplit_usage);
333 }
334 } else {
335 /* New usage: if no more argument, parse stdin */
336 if ( !*argp )
337 argp = stdin_only;
338 }
339
340 while (*argp) {
341 const char *arg = *argp++;
342 struct stat argstat;
343 int ret = 0;
344
345 if (arg[0] == '-' && arg[1] == 0) {
346 ret = split_mbox(arg, dir, allow_bare, nr_prec, nr);
347 if (ret < 0) {
348 error("cannot split patches from stdin");
349 return 1;
350 }
351 num += (ret - nr);
352 nr = ret;
353 continue;
354 }
355
356 if (stat(arg, &argstat) == -1) {
357 error_errno("cannot stat %s", arg);
358 return 1;
359 }
360
361 if (S_ISDIR(argstat.st_mode))
362 ret = split_maildir(arg, dir, nr_prec, nr);
363 else
364 ret = split_mbox(arg, dir, allow_bare, nr_prec, nr);
365
366 if (ret < 0) {
367 error("cannot split patches from %s", arg);
368 return 1;
369 }
370 num += (ret - nr);
371 nr = ret;
372 }
373
374 printf("%d\n", num);
375
376 return 0;
377}