]>
Commit | Line | Data |
---|---|---|
2744b234 LT |
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 | #include <unistd.h> | |
8 | #include <stdlib.h> | |
9 | #include <fcntl.h> | |
10 | #include <sys/types.h> | |
11 | #include <sys/stat.h> | |
2744b234 LT |
12 | #include <string.h> |
13 | #include <stdio.h> | |
2744b234 | 14 | #include <assert.h> |
8b73edf4 | 15 | #include "cache.h" |
2744b234 | 16 | |
8b73edf4 JH |
17 | static const char git_mailsplit_usage[] = |
18 | "git-mailsplit [-d<prec>] [<mbox>] <directory>"; | |
2744b234 LT |
19 | |
20 | static int is_from_line(const char *line, int len) | |
21 | { | |
22 | const char *colon; | |
23 | ||
24 | if (len < 20 || memcmp("From ", line, 5)) | |
25 | return 0; | |
26 | ||
27 | colon = line + len - 2; | |
28 | line += 5; | |
29 | for (;;) { | |
30 | if (colon < line) | |
31 | return 0; | |
32 | if (*--colon == ':') | |
33 | break; | |
34 | } | |
35 | ||
36 | if (!isdigit(colon[-4]) || | |
37 | !isdigit(colon[-2]) || | |
38 | !isdigit(colon[-1]) || | |
39 | !isdigit(colon[ 1]) || | |
40 | !isdigit(colon[ 2])) | |
41 | return 0; | |
42 | ||
43 | /* year */ | |
44 | if (strtol(colon+3, NULL, 10) <= 90) | |
45 | return 0; | |
46 | ||
47 | /* Ok, close enough */ | |
48 | return 1; | |
49 | } | |
50 | ||
8b73edf4 JH |
51 | /* Could be as small as 64, enough to hold a Unix "From " line. */ |
52 | static char buf[4096]; | |
53 | ||
54 | /* Called with the first line (potentially partial) | |
55 | * already in buf[] -- normally that should begin with | |
56 | * the Unix "From " line. Write it into the specified | |
57 | * file. | |
58 | */ | |
59 | static int split_one(FILE *mbox, const char *name) | |
2744b234 | 60 | { |
8b73edf4 JH |
61 | FILE *output = NULL; |
62 | int len = strlen(buf); | |
63 | int fd; | |
64 | int status = 0; | |
2744b234 | 65 | |
8b73edf4 | 66 | if (!is_from_line(buf, len)) |
2744b234 LT |
67 | goto corrupt; |
68 | ||
8b73edf4 JH |
69 | fd = open(name, O_WRONLY | O_CREAT | O_EXCL, 0666); |
70 | if (fd < 0) | |
71 | die("cannot open output file %s", name); | |
72 | output = fdopen(fd, "w"); | |
2744b234 | 73 | |
8b73edf4 JH |
74 | /* Copy it out, while searching for a line that begins with |
75 | * "From " and having something that looks like a date format. | |
2744b234 | 76 | */ |
8b73edf4 JH |
77 | for (;;) { |
78 | int is_partial = (buf[len-1] != '\n'); | |
79 | ||
80 | if (fputs(buf, output) == EOF) | |
81 | die("cannot write output"); | |
82 | ||
83 | if (fgets(buf, sizeof(buf), mbox) == NULL) { | |
84 | if (feof(mbox)) { | |
85 | status = 1; | |
86 | break; | |
87 | } | |
88 | die("cannot read mbox"); | |
89 | } | |
90 | len = strlen(buf); | |
91 | if (!is_partial && is_from_line(buf, len)) | |
92 | break; /* done with one message */ | |
93 | } | |
94 | fclose(output); | |
95 | return status; | |
96 | ||
97 | corrupt: | |
98 | if (output) | |
99 | fclose(output); | |
100 | unlink(name); | |
2744b234 LT |
101 | fprintf(stderr, "corrupt mailbox\n"); |
102 | exit(1); | |
103 | } | |
104 | ||
8b73edf4 | 105 | int main(int argc, const char **argv) |
2744b234 | 106 | { |
8b73edf4 JH |
107 | int i, nr, nr_prec = 4; |
108 | FILE *mbox = NULL; | |
109 | ||
110 | for (i = 1; i < argc; i++) { | |
111 | const char *arg = argv[i]; | |
112 | ||
113 | if (arg[0] != '-') | |
114 | break; | |
115 | /* do flags here */ | |
116 | if (!strncmp(arg, "-d", 2)) { | |
117 | nr_prec = strtol(arg + 2, NULL, 10); | |
118 | if (nr_prec < 3 || 10 <= nr_prec) | |
119 | usage(git_mailsplit_usage); | |
120 | continue; | |
121 | } | |
2744b234 | 122 | } |
8b73edf4 JH |
123 | |
124 | /* Either one remaining arg (dir), or two (mbox and dir) */ | |
125 | switch (argc - i) { | |
126 | case 1: | |
127 | mbox = stdin; | |
128 | break; | |
129 | case 2: | |
130 | if ((mbox = fopen(argv[i], "r")) == NULL) | |
131 | die("cannot open mbox %s for reading", argv[i]); | |
132 | break; | |
133 | default: | |
134 | usage(git_mailsplit_usage); | |
2744b234 | 135 | } |
8b73edf4 JH |
136 | if (chdir(argv[argc - 1]) < 0) |
137 | usage(git_mailsplit_usage); | |
138 | ||
2744b234 | 139 | nr = 0; |
8b73edf4 JH |
140 | if (fgets(buf, sizeof(buf), mbox) == NULL) |
141 | die("cannot read mbox"); | |
142 | ||
143 | for (;;) { | |
2744b234 | 144 | char name[10]; |
8b73edf4 | 145 | |
e11fc020 | 146 | sprintf(name, "%0*d", nr_prec, ++nr); |
8b73edf4 JH |
147 | switch (split_one(mbox, name)) { |
148 | case 0: | |
149 | break; | |
150 | case 1: | |
151 | printf("%d\n", nr); | |
152 | return 0; | |
153 | default: | |
2744b234 LT |
154 | exit(1); |
155 | } | |
8b73edf4 | 156 | } |
2744b234 | 157 | } |