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| Commit | Line | Data |
|---|---|---|
| ac48adf4 EN |
1 | #ifndef STATINFO_H |
| 2 | #define STATINFO_H | |
| 3 | ||
| 90cbae9c EN |
4 | struct index_state; |
| 5 | ||
| ac48adf4 EN |
6 | /* |
| 7 | * The "cache_time" is just the low 32 bits of the | |
| 8 | * time. It doesn't matter if it overflows - we only | |
| 9 | * check it for equality in the 32 bits we save. | |
| 10 | */ | |
| 11 | struct cache_time { | |
| 12 | uint32_t sec; | |
| 13 | uint32_t nsec; | |
| 14 | }; | |
| 15 | ||
| 16 | struct stat_data { | |
| 17 | struct cache_time sd_ctime; | |
| 18 | struct cache_time sd_mtime; | |
| 19 | unsigned int sd_dev; | |
| 20 | unsigned int sd_ino; | |
| 21 | unsigned int sd_uid; | |
| 22 | unsigned int sd_gid; | |
| 23 | unsigned int sd_size; | |
| 24 | }; | |
| 25 | ||
| 90cbae9c EN |
26 | /* |
| 27 | * A struct to encapsulate the concept of whether a file has changed | |
| 28 | * since we last checked it. This uses criteria similar to those used | |
| 29 | * for the index. | |
| 30 | */ | |
| 31 | struct stat_validity { | |
| 32 | struct stat_data *sd; | |
| 33 | }; | |
| 34 | ||
| 35 | #define MTIME_CHANGED 0x0001 | |
| 36 | #define CTIME_CHANGED 0x0002 | |
| 37 | #define OWNER_CHANGED 0x0004 | |
| 38 | #define MODE_CHANGED 0x0008 | |
| 39 | #define INODE_CHANGED 0x0010 | |
| 40 | #define DATA_CHANGED 0x0020 | |
| 41 | #define TYPE_CHANGED 0x0040 | |
| 42 | ||
| 43 | /* | |
| 44 | * Record to sd the data from st that we use to check whether a file | |
| 45 | * might have changed. | |
| 46 | */ | |
| 47 | void fill_stat_data(struct stat_data *sd, struct stat *st); | |
| 48 | ||
| c33fa871 JH |
49 | /* |
| 50 | * The inverse of the above. When we know the cache_entry that | |
| 51 | * contains sd is up-to-date, but still need to pretend we called | |
| 52 | * lstat() to learn that fact, this function fills "st" enough to | |
| 53 | * fool ie_match_stat(). | |
| 54 | */ | |
| 55 | void fake_lstat_data(const struct stat_data *sd, struct stat *st); | |
| 56 | ||
| 90cbae9c EN |
57 | /* |
| 58 | * Return 0 if st is consistent with a file not having been changed | |
| 59 | * since sd was filled. If there are differences, return a | |
| 60 | * combination of MTIME_CHANGED, CTIME_CHANGED, OWNER_CHANGED, | |
| 61 | * INODE_CHANGED, and DATA_CHANGED. | |
| 62 | */ | |
| 63 | int match_stat_data(const struct stat_data *sd, struct stat *st); | |
| 64 | ||
| 65 | void stat_validity_clear(struct stat_validity *sv); | |
| 66 | ||
| 67 | /* | |
| 68 | * Returns 1 if the path is a regular file (or a symlink to a regular | |
| 69 | * file) and matches the saved stat_validity, 0 otherwise. A missing | |
| 70 | * or inaccessible file is considered a match if the struct was just | |
| 71 | * initialized, or if the previous update found an inaccessible file. | |
| 72 | */ | |
| 73 | int stat_validity_check(struct stat_validity *sv, const char *path); | |
| 74 | ||
| 75 | /* | |
| 76 | * Update the stat_validity from a file opened at descriptor fd. If | |
| 77 | * the file is missing, inaccessible, or not a regular file, then | |
| 78 | * future calls to stat_validity_check will match iff one of those | |
| 79 | * conditions continues to be true. | |
| 80 | */ | |
| 81 | void stat_validity_update(struct stat_validity *sv, int fd); | |
| 82 | ||
| 03bf92b9 AS |
83 | #if defined(DT_UNKNOWN) && !defined(NO_D_TYPE_IN_DIRENT) |
| 84 | #define DTYPE(de) ((de)->d_type) | |
| 85 | #else | |
| 86 | #undef DT_UNKNOWN | |
| 87 | #undef DT_DIR | |
| 88 | #undef DT_REG | |
| 89 | #undef DT_LNK | |
| 90 | #define DT_UNKNOWN 0 | |
| 91 | #define DT_DIR 1 | |
| 92 | #define DT_REG 2 | |
| 93 | #define DT_LNK 3 | |
| 94 | #define DTYPE(de) DT_UNKNOWN | |
| 95 | #endif | |
| 96 | ||
| ac48adf4 | 97 | #endif |