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90cbae9c EN |
1 | #include "git-compat-util.h" |
2 | #include "environment.h" | |
3 | #include "statinfo.h" | |
4 | ||
5 | void fill_stat_data(struct stat_data *sd, struct stat *st) | |
6 | { | |
7 | sd->sd_ctime.sec = (unsigned int)st->st_ctime; | |
8 | sd->sd_mtime.sec = (unsigned int)st->st_mtime; | |
9 | sd->sd_ctime.nsec = ST_CTIME_NSEC(*st); | |
10 | sd->sd_mtime.nsec = ST_MTIME_NSEC(*st); | |
11 | sd->sd_dev = st->st_dev; | |
12 | sd->sd_ino = st->st_ino; | |
13 | sd->sd_uid = st->st_uid; | |
14 | sd->sd_gid = st->st_gid; | |
15 | sd->sd_size = st->st_size; | |
16 | } | |
17 | ||
18 | int match_stat_data(const struct stat_data *sd, struct stat *st) | |
19 | { | |
20 | int changed = 0; | |
21 | ||
22 | if (sd->sd_mtime.sec != (unsigned int)st->st_mtime) | |
23 | changed |= MTIME_CHANGED; | |
24 | if (trust_ctime && check_stat && | |
25 | sd->sd_ctime.sec != (unsigned int)st->st_ctime) | |
26 | changed |= CTIME_CHANGED; | |
27 | ||
28 | #ifdef USE_NSEC | |
29 | if (check_stat && sd->sd_mtime.nsec != ST_MTIME_NSEC(*st)) | |
30 | changed |= MTIME_CHANGED; | |
31 | if (trust_ctime && check_stat && | |
32 | sd->sd_ctime.nsec != ST_CTIME_NSEC(*st)) | |
33 | changed |= CTIME_CHANGED; | |
34 | #endif | |
35 | ||
36 | if (check_stat) { | |
37 | if (sd->sd_uid != (unsigned int) st->st_uid || | |
38 | sd->sd_gid != (unsigned int) st->st_gid) | |
39 | changed |= OWNER_CHANGED; | |
40 | if (sd->sd_ino != (unsigned int) st->st_ino) | |
41 | changed |= INODE_CHANGED; | |
42 | } | |
43 | ||
44 | #ifdef USE_STDEV | |
45 | /* | |
46 | * st_dev breaks on network filesystems where different | |
47 | * clients will have different views of what "device" | |
48 | * the filesystem is on | |
49 | */ | |
50 | if (check_stat && sd->sd_dev != (unsigned int) st->st_dev) | |
51 | changed |= INODE_CHANGED; | |
52 | #endif | |
53 | ||
54 | if (sd->sd_size != (unsigned int) st->st_size) | |
55 | changed |= DATA_CHANGED; | |
56 | ||
57 | return changed; | |
58 | } | |
59 | ||
60 | void stat_validity_clear(struct stat_validity *sv) | |
61 | { | |
62 | FREE_AND_NULL(sv->sd); | |
63 | } | |
64 | ||
65 | int stat_validity_check(struct stat_validity *sv, const char *path) | |
66 | { | |
67 | struct stat st; | |
68 | ||
69 | if (stat(path, &st) < 0) | |
70 | return sv->sd == NULL; | |
71 | if (!sv->sd) | |
72 | return 0; | |
73 | return S_ISREG(st.st_mode) && !match_stat_data(sv->sd, &st); | |
74 | } | |
75 | ||
76 | void stat_validity_update(struct stat_validity *sv, int fd) | |
77 | { | |
78 | struct stat st; | |
79 | ||
80 | if (fstat(fd, &st) < 0 || !S_ISREG(st.st_mode)) | |
81 | stat_validity_clear(sv); | |
82 | else { | |
83 | if (!sv->sd) | |
84 | CALLOC_ARRAY(sv->sd, 1); | |
85 | fill_stat_data(sv->sd, &st); | |
86 | } | |
87 | } |