mirror of
https://github.com/git/git.git
synced 2024-11-17 22:44:49 +01:00
597c9cc540
Also make platform specific part more isolated. Currently we only have Darwin defined, but I've taken a look at SunOS specific patch (which I dropped on the floor for now) as well. Doing things this way would make adding it easier. Signed-off-by: Junio C Hamano <junkio@cox.net>
145 lines
2.5 KiB
C
145 lines
2.5 KiB
C
/*
|
|
* Totally braindamaged mbox splitter program.
|
|
*
|
|
* It just splits a mbox into a list of files: "0001" "0002" ..
|
|
* so you can process them further from there.
|
|
*/
|
|
#include <unistd.h>
|
|
#include <stdlib.h>
|
|
#include <fcntl.h>
|
|
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
#include <sys/mman.h>
|
|
#include <string.h>
|
|
#include <stdio.h>
|
|
#include <ctype.h>
|
|
#include <assert.h>
|
|
|
|
static int usage(void)
|
|
{
|
|
fprintf(stderr, "mailsplit <mbox> <directory>\n");
|
|
exit(1);
|
|
}
|
|
|
|
static int linelen(const char *map, unsigned long size)
|
|
{
|
|
int len = 0, c;
|
|
|
|
do {
|
|
c = *map;
|
|
map++;
|
|
size--;
|
|
len++;
|
|
} while (size && c != '\n');
|
|
return len;
|
|
}
|
|
|
|
static int is_from_line(const char *line, int len)
|
|
{
|
|
const char *colon;
|
|
|
|
if (len < 20 || memcmp("From ", line, 5))
|
|
return 0;
|
|
|
|
colon = line + len - 2;
|
|
line += 5;
|
|
for (;;) {
|
|
if (colon < line)
|
|
return 0;
|
|
if (*--colon == ':')
|
|
break;
|
|
}
|
|
|
|
if (!isdigit(colon[-4]) ||
|
|
!isdigit(colon[-2]) ||
|
|
!isdigit(colon[-1]) ||
|
|
!isdigit(colon[ 1]) ||
|
|
!isdigit(colon[ 2]))
|
|
return 0;
|
|
|
|
/* year */
|
|
if (strtol(colon+3, NULL, 10) <= 90)
|
|
return 0;
|
|
|
|
/* Ok, close enough */
|
|
return 1;
|
|
}
|
|
|
|
static int parse_email(const void *map, unsigned long size)
|
|
{
|
|
unsigned long offset;
|
|
|
|
if (size < 6 || memcmp("From ", map, 5))
|
|
goto corrupt;
|
|
|
|
/* Make sure we don't trigger on this first line */
|
|
map++; size--; offset=1;
|
|
|
|
/*
|
|
* Search for a line beginning with "From ", and
|
|
* having something that looks like a date format.
|
|
*/
|
|
do {
|
|
int len = linelen(map, size);
|
|
if (is_from_line(map, len))
|
|
return offset;
|
|
map += len;
|
|
size -= len;
|
|
offset += len;
|
|
} while (size);
|
|
return offset;
|
|
|
|
corrupt:
|
|
fprintf(stderr, "corrupt mailbox\n");
|
|
exit(1);
|
|
}
|
|
|
|
int main(int argc, char **argv)
|
|
{
|
|
int fd, nr;
|
|
struct stat st;
|
|
unsigned long size;
|
|
void *map;
|
|
|
|
if (argc != 3)
|
|
usage();
|
|
fd = open(argv[1], O_RDONLY);
|
|
if (fd < 0) {
|
|
perror(argv[1]);
|
|
exit(1);
|
|
}
|
|
if (chdir(argv[2]) < 0)
|
|
usage();
|
|
if (fstat(fd, &st) < 0) {
|
|
perror("stat");
|
|
exit(1);
|
|
}
|
|
size = st.st_size;
|
|
map = mmap(NULL, size, PROT_READ, MAP_PRIVATE, fd, 0);
|
|
if (map == MAP_FAILED) {
|
|
perror("mmap");
|
|
close(fd);
|
|
exit(1);
|
|
}
|
|
close(fd);
|
|
nr = 0;
|
|
do {
|
|
char name[10];
|
|
unsigned long len = parse_email(map, size);
|
|
assert(len <= size);
|
|
sprintf(name, "%04d", ++nr);
|
|
fd = open(name, O_WRONLY | O_CREAT | O_EXCL, 0600);
|
|
if (fd < 0) {
|
|
perror(name);
|
|
exit(1);
|
|
}
|
|
if (write(fd, map, len) != len) {
|
|
perror("write");
|
|
exit(1);
|
|
}
|
|
close(fd);
|
|
map += len;
|
|
size -= len;
|
|
} while (size > 0);
|
|
return 0;
|
|
}
|