[PATCH] Make nsec checking optional
[git/git.git] / read-tree.c
... / ...
CommitLineData
1/*
2 * GIT - The information manager from hell
3 *
4 * Copyright (C) Linus Torvalds, 2005
5 */
6#include "cache.h"
7
8static int read_one_entry(unsigned char *sha1, const char *base, int baselen, const char *pathname, unsigned mode)
9{
10 int len = strlen(pathname);
11 unsigned int size = cache_entry_size(baselen + len);
12 struct cache_entry *ce = malloc(size);
13
14 memset(ce, 0, size);
15
16 ce->st_mode = mode;
17 ce->namelen = baselen + len;
18 memcpy(ce->name, base, baselen);
19 memcpy(ce->name + baselen, pathname, len+1);
20 memcpy(ce->sha1, sha1, 20);
21 return add_cache_entry(ce, 1);
22}
23
24static int read_tree(unsigned char *sha1, const char *base, int baselen)
25{
26 void *buffer;
27 unsigned long size;
28 char type[20];
29
30 buffer = read_sha1_file(sha1, type, &size);
31 if (!buffer)
32 return -1;
33 if (strcmp(type, "tree"))
34 return -1;
35 while (size) {
36 int len = strlen(buffer)+1;
37 unsigned char *sha1 = buffer + len;
38 char *path = strchr(buffer, ' ')+1;
39 unsigned int mode;
40
41 if (size < len + 20 || sscanf(buffer, "%o", &mode) != 1)
42 return -1;
43
44 buffer = sha1 + 20;
45 size -= len + 20;
46
47 if (S_ISDIR(mode)) {
48 int retval;
49 int pathlen = strlen(path);
50 char *newbase = malloc(baselen + 1 + pathlen);
51 memcpy(newbase, base, baselen);
52 memcpy(newbase + baselen, path, pathlen);
53 newbase[baselen + pathlen] = '/';
54 retval = read_tree(sha1, newbase, baselen + pathlen + 1);
55 free(newbase);
56 if (retval)
57 return -1;
58 continue;
59 }
60 if (read_one_entry(sha1, base, baselen, path, mode) < 0)
61 return -1;
62 }
63 return 0;
64}
65
66static int remove_lock = 0;
67
68static void remove_lock_file(void)
69{
70 if (remove_lock)
71 unlink(".git/index.lock");
72}
73
74int main(int argc, char **argv)
75{
76 int i, newfd;
77 unsigned char sha1[20];
78
79 newfd = open(".git/index.lock", O_RDWR | O_CREAT | O_EXCL, 0600);
80 if (newfd < 0)
81 usage("unable to create new cachefile");
82 atexit(remove_lock_file);
83 remove_lock = 1;
84
85 for (i = 1; i < argc; i++) {
86 const char *arg = argv[i];
87
88 /* "-m" stands for "merge" current directory cache */
89 if (!strcmp(arg, "-m")) {
90 if (active_cache)
91 usage("read-tree: cannot merge old cache on top of new");
92 if (read_cache() < 0)
93 usage("read-tree: corrupt directory cache");
94 continue;
95 }
96 if (get_sha1_hex(arg, sha1) < 0)
97 usage("read-tree [-m] <sha1>");
98 if (read_tree(sha1, "", 0) < 0)
99 usage("failed to unpack tree object %s", arg);
100 }
101 if (write_cache(newfd, active_cache, active_nr) ||
102 rename(".git/index.lock", ".git/index"))
103 usage("unable to write new index file");
104 remove_lock = 0;
105 return 0;
106}