French translation: copy -> copie.
[git/dscho.git] / builtin / mailsplit.c
blob2d4327801e4f7766328389311c87dd63d4c5f8e4
1 /*
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.
6 */
7 #include "cache.h"
8 #include "builtin.h"
9 #include "string-list.h"
10 #include "strbuf.h"
12 static const char git_mailsplit_usage[] =
13 "git mailsplit [-d<prec>] [-f<n>] [-b] [--keep-cr] -o<directory> [(<mbox>|<Maildir>)...]";
15 static int is_from_line(const char *line, int len)
17 const char *colon;
19 if (len < 20 || memcmp("From ", line, 5))
20 return 0;
22 colon = line + len - 2;
23 line += 5;
24 for (;;) {
25 if (colon < line)
26 return 0;
27 if (*--colon == ':')
28 break;
31 if (!isdigit(colon[-4]) ||
32 !isdigit(colon[-2]) ||
33 !isdigit(colon[-1]) ||
34 !isdigit(colon[ 1]) ||
35 !isdigit(colon[ 2]))
36 return 0;
38 /* year */
39 if (strtol(colon+3, NULL, 10) <= 90)
40 return 0;
42 /* Ok, close enough */
43 return 1;
46 static struct strbuf buf = STRBUF_INIT;
47 static int keep_cr;
49 /* Called with the first line (potentially partial)
50 * already in buf[] -- normally that should begin with
51 * the Unix "From " line. Write it into the specified
52 * file.
54 static int split_one(FILE *mbox, const char *name, int allow_bare)
56 FILE *output = NULL;
57 int fd;
58 int status = 0;
59 int is_bare = !is_from_line(buf.buf, buf.len);
61 if (is_bare && !allow_bare)
62 goto corrupt;
64 fd = open(name, O_WRONLY | O_CREAT | O_EXCL, 0666);
65 if (fd < 0)
66 die_errno("cannot open output file '%s'", name);
67 output = xfdopen(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.
72 for (;;) {
73 if (!keep_cr && buf.len > 1 && buf.buf[buf.len-1] == '\n' &&
74 buf.buf[buf.len-2] == '\r') {
75 strbuf_setlen(&buf, buf.len-2);
76 strbuf_addch(&buf, '\n');
79 if (fwrite(buf.buf, 1, buf.len, output) != buf.len)
80 die_errno("cannot write output");
82 if (strbuf_getwholeline(&buf, mbox, '\n')) {
83 if (feof(mbox)) {
84 status = 1;
85 break;
87 die_errno("cannot read mbox");
89 if (!is_bare && is_from_line(buf.buf, buf.len))
90 break; /* done with one message */
92 fclose(output);
93 return status;
95 corrupt:
96 if (output)
97 fclose(output);
98 unlink(name);
99 fprintf(stderr, "corrupt mailbox\n");
100 exit(1);
103 static int populate_maildir_list(struct string_list *list, const char *path)
105 DIR *dir;
106 struct dirent *dent;
107 char name[PATH_MAX];
108 char *subs[] = { "cur", "new", NULL };
109 char **sub;
111 for (sub = subs; *sub; ++sub) {
112 snprintf(name, sizeof(name), "%s/%s", path, *sub);
113 if ((dir = opendir(name)) == NULL) {
114 if (errno == ENOENT)
115 continue;
116 error("cannot opendir %s (%s)", name, strerror(errno));
117 return -1;
120 while ((dent = readdir(dir)) != NULL) {
121 if (dent->d_name[0] == '.')
122 continue;
123 snprintf(name, sizeof(name), "%s/%s", *sub, dent->d_name);
124 string_list_insert(list, name);
127 closedir(dir);
130 return 0;
133 static int split_maildir(const char *maildir, const char *dir,
134 int nr_prec, int skip)
136 char file[PATH_MAX];
137 char name[PATH_MAX];
138 int ret = -1;
139 int i;
140 struct string_list list = STRING_LIST_INIT_DUP;
142 if (populate_maildir_list(&list, maildir) < 0)
143 goto out;
145 for (i = 0; i < list.nr; i++) {
146 FILE *f;
147 snprintf(file, sizeof(file), "%s/%s", maildir, list.items[i].string);
148 f = fopen(file, "r");
149 if (!f) {
150 error("cannot open mail %s (%s)", file, strerror(errno));
151 goto out;
154 if (strbuf_getwholeline(&buf, f, '\n')) {
155 error("cannot read mail %s (%s)", file, strerror(errno));
156 goto out;
159 sprintf(name, "%s/%0*d", dir, nr_prec, ++skip);
160 split_one(f, name, 1);
162 fclose(f);
165 ret = skip;
166 out:
167 string_list_clear(&list, 1);
168 return ret;
171 static int split_mbox(const char *file, const char *dir, int allow_bare,
172 int nr_prec, int skip)
174 char name[PATH_MAX];
175 int ret = -1;
176 int peek;
178 FILE *f = !strcmp(file, "-") ? stdin : fopen(file, "r");
179 int file_done = 0;
181 if (!f) {
182 error("cannot open mbox %s", file);
183 goto out;
186 do {
187 peek = fgetc(f);
188 } while (isspace(peek));
189 ungetc(peek, f);
191 if (strbuf_getwholeline(&buf, f, '\n')) {
192 /* empty stdin is OK */
193 if (f != stdin) {
194 error("cannot read mbox %s", file);
195 goto out;
197 file_done = 1;
200 while (!file_done) {
201 sprintf(name, "%s/%0*d", dir, nr_prec, ++skip);
202 file_done = split_one(f, name, allow_bare);
205 if (f != stdin)
206 fclose(f);
208 ret = skip;
209 out:
210 return ret;
213 int cmd_mailsplit(int argc, const char **argv, const char *prefix)
215 int nr = 0, nr_prec = 4, num = 0;
216 int allow_bare = 0;
217 const char *dir = NULL;
218 const char **argp;
219 static const char *stdin_only[] = { "-", NULL };
221 for (argp = argv+1; *argp; argp++) {
222 const char *arg = *argp;
224 if (arg[0] != '-')
225 break;
226 /* do flags here */
227 if ( arg[1] == 'd' ) {
228 nr_prec = strtol(arg+2, NULL, 10);
229 if (nr_prec < 3 || 10 <= nr_prec)
230 usage(git_mailsplit_usage);
231 continue;
232 } else if ( arg[1] == 'f' ) {
233 nr = strtol(arg+2, NULL, 10);
234 } else if ( arg[1] == 'h' ) {
235 usage(git_mailsplit_usage);
236 } else if ( arg[1] == 'b' && !arg[2] ) {
237 allow_bare = 1;
238 } else if (!strcmp(arg, "--keep-cr")) {
239 keep_cr = 1;
240 } else if ( arg[1] == 'o' && arg[2] ) {
241 dir = arg+2;
242 } else if ( arg[1] == '-' && !arg[2] ) {
243 argp++; /* -- marks end of options */
244 break;
245 } else {
246 die("unknown option: %s", arg);
250 if ( !dir ) {
251 /* Backwards compatibility: if no -o specified, accept
252 <mbox> <dir> or just <dir> */
253 switch (argc - (argp-argv)) {
254 case 1:
255 dir = argp[0];
256 argp = stdin_only;
257 break;
258 case 2:
259 stdin_only[0] = argp[0];
260 dir = argp[1];
261 argp = stdin_only;
262 break;
263 default:
264 usage(git_mailsplit_usage);
266 } else {
267 /* New usage: if no more argument, parse stdin */
268 if ( !*argp )
269 argp = stdin_only;
272 while (*argp) {
273 const char *arg = *argp++;
274 struct stat argstat;
275 int ret = 0;
277 if (arg[0] == '-' && arg[1] == 0) {
278 ret = split_mbox(arg, dir, allow_bare, nr_prec, nr);
279 if (ret < 0) {
280 error("cannot split patches from stdin");
281 return 1;
283 num += (ret - nr);
284 nr = ret;
285 continue;
288 if (stat(arg, &argstat) == -1) {
289 error("cannot stat %s (%s)", arg, strerror(errno));
290 return 1;
293 if (S_ISDIR(argstat.st_mode))
294 ret = split_maildir(arg, dir, nr_prec, nr);
295 else
296 ret = split_mbox(arg, dir, allow_bare, nr_prec, nr);
298 if (ret < 0) {
299 error("cannot split patches from %s", arg);
300 return 1;
302 num += (ret - nr);
303 nr = ret;
306 printf("%d\n", num);
308 return 0;