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chromium / external / github.com / git / git / refs/tags/v0.99.8c / . / entry.c
blob: b8426dbd0dae619b9f2023f9cf46f4d8c3df0a24 [file] [log] [blame]
Linus Torvalds12dccc12005-06-06 04:59:54[diff] [blame]1#include <sys/types.h>
2#include <dirent.h>
3#include "cache.h"
4
5static void create_directories(const char *path, struct checkout *state)
6{
7 int len = strlen(path);
8 char *buf = xmalloc(len + 1);
9 const char *slash = path;
10
11 while ((slash = strchr(slash+1, '/')) != NULL) {
12 len = slash - path;
13 memcpy(buf, path, len);
14 buf[len] = 0;
Junio C Hamanof312de02005-07-06 08:21:46[diff] [blame]15 if (mkdir(buf, 0777)) {
Linus Torvalds12dccc12005-06-06 04:59:54[diff] [blame]16 if (errno == EEXIST) {
17 struct stat st;
Junio C Hamanof312de02005-07-06 08:21:46[diff] [blame]18 if (len > state->base_dir_len && state->force && !unlink(buf) && !mkdir(buf, 0777))
Linus Torvalds12dccc12005-06-06 04:59:54[diff] [blame]19 continue;
20 if (!stat(buf, &st) && S_ISDIR(st.st_mode))
21 continue; /* ok */
22 }
23 die("cannot create directory at %s", buf);
24 }
25 }
26 free(buf);
27}
28
29static void remove_subtree(const char *path)
30{
31 DIR *dir = opendir(path);
32 struct dirent *de;
33 char pathbuf[PATH_MAX];
34 char *name;
35
36 if (!dir)
37 die("cannot opendir %s", path);
38 strcpy(pathbuf, path);
39 name = pathbuf + strlen(path);
40 *name++ = '/';
41 while ((de = readdir(dir)) != NULL) {
42 struct stat st;
43 if ((de->d_name[0] == '.') &&
44 ((de->d_name[1] == 0) ||
45 ((de->d_name[1] == '.') && de->d_name[2] == 0)))
46 continue;
47 strcpy(name, de->d_name);
48 if (lstat(pathbuf, &st))
49 die("cannot lstat %s", pathbuf);
50 if (S_ISDIR(st.st_mode))
51 remove_subtree(pathbuf);
52 else if (unlink(pathbuf))
53 die("cannot unlink %s", pathbuf);
54 }
55 closedir(dir);
56 if (rmdir(path))
57 die("cannot rmdir %s", path);
58}
59
Linus Torvaldsd48a72f2005-07-14 16:58:45[diff] [blame]60static int create_file(const char *path, unsigned int mode)
Linus Torvalds12dccc12005-06-06 04:59:54[diff] [blame]61{
Linus Torvalds12dccc12005-06-06 04:59:54[diff] [blame]62 mode = (mode & 0100) ? 0777 : 0666;
Linus Torvaldsd48a72f2005-07-14 16:58:45[diff] [blame]63 return open(path, O_WRONLY | O_TRUNC | O_CREAT | O_EXCL, mode);
Linus Torvalds12dccc12005-06-06 04:59:54[diff] [blame]64}
65
66static int write_entry(struct cache_entry *ce, const char *path, struct checkout *state)
67{
68 int fd;
69 void *new;
70 unsigned long size;
71 long wrote;
72 char type[20];
73 char target[1024];
74
75 new = read_sha1_file(ce->sha1, type, &size);
76 if (!new || strcmp(type, "blob")) {
77 if (new)
78 free(new);
Junio C Hamano215a7ad2005-09-08 00:26:23[diff] [blame]79 return error("git-checkout-index: unable to read sha1 file of %s (%s)",
Linus Torvalds12dccc12005-06-06 04:59:54[diff] [blame]80 path, sha1_to_hex(ce->sha1));
81 }
82 switch (ntohl(ce->ce_mode) & S_IFMT) {
83 case S_IFREG:
Linus Torvaldsd48a72f2005-07-14 16:58:45[diff] [blame]84 fd = create_file(path, ntohl(ce->ce_mode));
Linus Torvalds12dccc12005-06-06 04:59:54[diff] [blame]85 if (fd < 0) {
86 free(new);
Junio C Hamano215a7ad2005-09-08 00:26:23[diff] [blame]87 return error("git-checkout-index: unable to create file %s (%s)",
Linus Torvalds12dccc12005-06-06 04:59:54[diff] [blame]88 path, strerror(errno));
89 }
90 wrote = write(fd, new, size);
91 close(fd);
92 free(new);
93 if (wrote != size)
Junio C Hamano215a7ad2005-09-08 00:26:23[diff] [blame]94 return error("git-checkout-index: unable to write file %s", path);
Linus Torvalds12dccc12005-06-06 04:59:54[diff] [blame]95 break;
96 case S_IFLNK:
97 memcpy(target, new, size);
98 target[size] = '\0';
99 if (symlink(target, path)) {
100 free(new);
Junio C Hamano215a7ad2005-09-08 00:26:23[diff] [blame]101 return error("git-checkout-index: unable to create symlink %s (%s)",
Linus Torvalds12dccc12005-06-06 04:59:54[diff] [blame]102 path, strerror(errno));
103 }
104 free(new);
105 break;
106 default:
107 free(new);
Junio C Hamano215a7ad2005-09-08 00:26:23[diff] [blame]108 return error("git-checkout-index: unknown file mode for %s", path);
Linus Torvalds12dccc12005-06-06 04:59:54[diff] [blame]109 }
110
Linus Torvalds6ee67f22005-06-06 06:15:40[diff] [blame]111 if (state->refresh_cache) {
Linus Torvalds12dccc12005-06-06 04:59:54[diff] [blame]112 struct stat st;
113 lstat(ce->name, &st);
114 fill_stat_cache_info(ce, &st);
115 }
116 return 0;
117}
118
119int checkout_entry(struct cache_entry *ce, struct checkout *state)
120{
121 struct stat st;
122 static char path[MAXPATHLEN+1];
123 int len = state->base_dir_len;
124
125 memcpy(path, state->base_dir, len);
126 strcpy(path + len, ce->name);
127
128 if (!lstat(path, &st)) {
129 unsigned changed = ce_match_stat(ce, &st);
130 if (!changed)
131 return 0;
132 if (!state->force) {
133 if (!state->quiet)
Junio C Hamano215a7ad2005-09-08 00:26:23[diff] [blame]134 fprintf(stderr, "git-checkout-index: %s already exists\n", path);
Linus Torvalds12dccc12005-06-06 04:59:54[diff] [blame]135 return 0;
136 }
137
138 /*
139 * We unlink the old file, to get the new one with the
140 * right permissions (including umask, which is nasty
141 * to emulate by hand - much easier to let the system
142 * just do the right thing)
143 */
144 unlink(path);
Linus Torvaldsd48a72f2005-07-14 16:58:45[diff] [blame]145 if (S_ISDIR(st.st_mode)) {
146 if (!state->force)
147 return error("%s is a directory", path);
148 remove_subtree(path);
149 }
Linus Torvalds12dccc12005-06-06 04:59:54[diff] [blame]150 } else if (state->not_new)
151 return 0;
152 create_directories(path, state);
153 return write_entry(ce, path, state);
154}
155
156