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dir.[ch]: add 'follow_symlink' arg to 'get_dtype'

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Add a 'follow_symlink' boolean option to 'get_type()'. If 'follow_symlink'
is enabled, DT_LNK (in addition to DT_UNKNOWN) d_types triggers the
stat-based d_type resolution, using 'stat' instead of 'lstat' to get the
type of the followed symlink. Note that symlinks are not followed
recursively, so a symlink pointing to another symlink will still resolve to
DT_LNK.

Update callers in 'diagnose.c' to specify 'follow_symlink = 0' to preserve
current behavior.

Signed-off-by: Victoria Dye <vdye@github.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Victoria Dye
2023-10-09 21:58:55 +00:00
committed by Junio C Hamano
parent 6dc1004333
commit aa79636fe7
3 changed files with 18 additions and 8 deletions
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7
dir.h
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@@ -368,11 +368,16 @@ struct dirent *readdir_skip_dot_and_dotdot(DIR *dirp);
* stat.st_mode using the path to the dirent's containing directory (path) and
* the name of the dirent itself.
*
* If 'follow_symlink' is 1, this function will attempt to follow DT_LNK types
* using 'stat'. Links are *not* followed recursively, so a symlink pointing
* to another symlink will still resolve to 'DT_LNK'.
*
* Note that 'path' is assumed to have a trailing slash. It is also modified
* in-place during the execution of the function, but is then reverted to its
* original value before returning.
*/
unsigned char get_dtype(struct dirent *e, struct strbuf *path);
unsigned char get_dtype(struct dirent *e, struct strbuf *path,
int follow_symlink);
/*Count the number of slashes for string s*/
int count_slashes(const char *s);