Add the git-*-script files to the install
[git/git.git] / fsck-cache.c
CommitLineData
20222118
LT
1#include "cache.h"
2
3#include <sys/types.h>
4#include <dirent.h>
5
ff5ebe39
DB
6#include "commit.h"
7#include "tree.h"
8#include "blob.h"
9
10#define REACHABLE 0x0001
d9839e03
LT
11
12static int show_unreachable = 0;
d9839e03
LT
13static unsigned char head_sha1[20];
14
8ba0bbb2
LT
15static void check_connectivity(void)
16{
17 int i;
18
8ba0bbb2 19 /* Look up all the requirements, warn about missing objects.. */
ff5ebe39
DB
20 for (i = 0; i < nr_objs; i++) {
21 struct object *obj = objs[i];
8ba0bbb2 22
ff5ebe39 23 if (show_unreachable && !(obj->flags & REACHABLE)) {
f43b8abc 24 printf("unreachable %s %s\n", obj->type, sha1_to_hex(obj->sha1));
8ba0bbb2 25 continue;
d9839e03 26 }
8ba0bbb2 27
ff5ebe39
DB
28 if (!obj->parsed) {
29 printf("missing %s %s\n", obj->type,
30 sha1_to_hex(obj->sha1));
31 }
32 if (!obj->used) {
33 printf("dangling %s %s\n", obj->type,
34 sha1_to_hex(obj->sha1));
d9839e03 35 }
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LT
36 }
37}
38
1ea34e36 39static int fsck_tree(unsigned char *sha1, void *data, unsigned long size)
20222118 40{
ff5ebe39
DB
41 struct tree *item = lookup_tree(sha1);
42 if (parse_tree(item))
43 return -1;
44 if (item->has_full_path) {
45 fprintf(stderr, "warning: fsck-cache: tree %s "
46 "has full pathnames in it\n", sha1_to_hex(sha1));
1ea34e36 47 }
59c1e249 48 return 0;
1ea34e36
LT
49}
50
51static int fsck_commit(unsigned char *sha1, void *data, unsigned long size)
52{
ff5ebe39
DB
53 struct commit *commit = lookup_commit(sha1);
54 if (parse_commit(commit))
1ea34e36 55 return -1;
ff5ebe39 56 if (!commit->tree)
1ea34e36 57 return -1;
ff5ebe39 58 if (!commit->parents)
d9839e03 59 printf("root %s\n", sha1_to_hex(sha1));
e6948b6d
LT
60 if (!commit->date)
61 printf("bad commit date in %s\n", sha1_to_hex(sha1));
59c1e249 62 return 0;
20222118
LT
63}
64
4728b861
LT
65static int fsck_blob(unsigned char *sha1, void *data, unsigned long size)
66{
67 struct blob *blob = lookup_blob(sha1);
68 blob->object.parsed = 1;
69 return 0;
70}
71
ec4465ad
LT
72static int fsck_tag(unsigned char *sha1, void *data, unsigned long size)
73{
74 int typelen, taglen;
75 unsigned char object[20];
56ce69f7 76 char object_hex[60];
ec4465ad
LT
77 const char *type_line, *tag_line, *sig_line;
78
79 if (size < 64)
80 return -1;
81 if (memcmp("object ", data, 7) || get_sha1_hex(data + 7, object))
82 return -1;
83
84 type_line = data + 48;
85 if (memcmp("\ntype ", type_line-1, 6))
86 return -1;
87
88 tag_line = strchr(type_line, '\n');
89 if (!tag_line || memcmp("tag ", ++tag_line, 4))
90 return -1;
91
92 sig_line = strchr(tag_line, '\n');
93 if (!sig_line)
94 return -1;
95 sig_line++;
96
97 typelen = tag_line - type_line - strlen("type \n");
98 if (typelen >= 20)
99 return -1;
100 taglen = sig_line - tag_line - strlen("tag \n");
101
56ce69f7
LT
102 strcpy(object_hex, sha1_to_hex(object));
103 printf("tagged %.*s %s (%.*s) in %s\n",
ec4465ad 104 typelen, type_line + 5,
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LT
105 object_hex,
106 taglen, tag_line + 4,
107 sha1_to_hex(sha1));
ec4465ad
LT
108 return 0;
109}
110
ff5ebe39
DB
111static int fsck_entry(unsigned char *sha1, char *tag, void *data,
112 unsigned long size)
20222118 113{
1ea34e36 114 if (!strcmp(tag, "blob")) {
4728b861
LT
115 if (fsck_blob(sha1, data, size) < 0)
116 return -1;
1ea34e36
LT
117 } else if (!strcmp(tag, "tree")) {
118 if (fsck_tree(sha1, data, size) < 0)
119 return -1;
120 } else if (!strcmp(tag, "commit")) {
121 if (fsck_commit(sha1, data, size) < 0)
122 return -1;
ec4465ad
LT
123 } else if (!strcmp(tag, "tag")) {
124 if (fsck_tag(sha1, data, size) < 0)
125 return -1;
1ea34e36 126 } else
20222118 127 return -1;
ff5ebe39 128 return 0;
20222118
LT
129}
130
131static int fsck_name(char *hex)
132{
133 unsigned char sha1[20];
134 if (!get_sha1_hex(hex, sha1)) {
135 unsigned long mapsize;
136 void *map = map_sha1_file(sha1, &mapsize);
137 if (map) {
138 char type[100];
139 unsigned long size;
d98b46f8
LT
140 void *buffer = unpack_sha1_file(map, mapsize, type, &size);
141 if (!buffer)
142 return -1;
143 if (check_sha1_signature(sha1, buffer, size, type) < 0)
144 printf("sha1 mismatch %s\n", sha1_to_hex(sha1));
20222118 145 munmap(map, mapsize);
d98b46f8 146 if (!fsck_entry(sha1, type, buffer, size))
20222118
LT
147 return 0;
148 }
149 }
150 return -1;
151}
152
153static int fsck_dir(int i, char *path)
154{
155 DIR *dir = opendir(path);
156 struct dirent *de;
157
158 if (!dir) {
2de381f9 159 return error("missing sha1 directory '%s'", path);
20222118
LT
160 }
161
162 while ((de = readdir(dir)) != NULL) {
163 char name[100];
164 int len = strlen(de->d_name);
165
166 switch (len) {
167 case 2:
168 if (de->d_name[1] != '.')
169 break;
170 case 1:
171 if (de->d_name[0] != '.')
172 break;
173 continue;
174 case 38:
175 sprintf(name, "%02x", i);
176 memcpy(name+2, de->d_name, len+1);
177 if (!fsck_name(name))
178 continue;
179 }
180 fprintf(stderr, "bad sha1 file: %s/%s\n", path, de->d_name);
181 }
182 closedir(dir);
183 return 0;
184}
185
186int main(int argc, char **argv)
187{
bcee6fd8 188 int i, heads;
20222118
LT
189 char *sha1_dir;
190
bcee6fd8
LT
191 sha1_dir = getenv(DB_ENVIRONMENT) ? : DEFAULT_DB_ENVIRONMENT;
192 for (i = 0; i < 256; i++) {
193 static char dir[4096];
194 sprintf(dir, "%s/%02x", sha1_dir, i);
195 fsck_dir(i, dir);
196 }
197
198 heads = 0;
d9839e03
LT
199 for (i = 1; i < argc; i++) {
200 if (!strcmp(argv[i], "--unreachable")) {
201 show_unreachable = 1;
202 continue;
203 }
204 if (!get_sha1_hex(argv[i], head_sha1)) {
b51ad431 205 struct object *obj = &lookup_commit(head_sha1)->object;
ff5ebe39
DB
206 obj->used = 1;
207 mark_reachable(obj, REACHABLE);
bcee6fd8 208 heads++;
d9839e03
LT
209 continue;
210 }
bcee6fd8 211 error("fsck-cache [[--unreachable] <head-sha1>*]");
d9839e03 212 }
d9839e03 213
bcee6fd8
LT
214 if (!heads) {
215 if (show_unreachable) {
216 fprintf(stderr, "unable to do reachability without a head\n");
217 show_unreachable = 0;
218 }
219 fprintf(stderr, "expect dangling commits - potential heads - due to lack of head information\n");
20222118 220 }
bcee6fd8 221
8ba0bbb2 222 check_connectivity();
20222118
LT
223 return 0;
224}