From 0117c2f043183fb99e9b046b0df7d64c1b296624 Mon Sep 17 00:00:00 2001 From: =?utf8?q?Torsten=20B=C3=B6gershausen?= Date: Sat, 23 Mar 2013 13:40:29 +0100 Subject: [PATCH] Make core.sharedRepository work under cygwin 1.7 MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit When core.sharedRepository is used, set_shared_perm() in path.c needs lstat() to return the correct POSIX permissions. The default for cygwin is core.ignoreCygwinFSTricks = false, which means that the fast implementation in do_stat() is used instead of lstat(). lstat() under cygwin uses the Windows security model to implement POSIX-like permissions. The user, group or everyone bits can be set individually. do_stat() simplifes the file permission bits, and may return a wrong value. The read-only attribute of a file is used to calculate the permissions, resulting in either rw-r--r-- or r--r--r-- One effect of the simplified do_stat() is that t1301 fails. Add a function cygwin_get_st_mode_bits() which returns the POSIX permissions. When not compiling for cygwin, true_mode_bits() in path.c is used. Side note: t1301 passes under cygwin 1.5. The "user write" bit is synchronized with the "read only" attribute of a file: $ chmod 444 x $ attrib x A R C:\temp\pt\x cygwin 1.7 would show A C:\temp\pt\x Signed-off-by: Torsten Bögershausen Signed-off-by: Junio C Hamano --- compat/cygwin.c | 13 +++++++++++++ compat/cygwin.h | 5 +++++ git-compat-util.h | 1 + path.c | 20 +++++++++++++++++--- 4 files changed, 36 insertions(+), 3 deletions(-) diff --git a/compat/cygwin.c b/compat/cygwin.c index 5428858875..871b41d23a 100644 --- a/compat/cygwin.c +++ b/compat/cygwin.c @@ -1,3 +1,4 @@ +#define CYGWIN_C #define WIN32_LEAN_AND_MEAN #ifdef CYGWIN_V15_WIN32API #include "../git-compat-util.h" @@ -10,6 +11,18 @@ #endif #include "../cache.h" /* to read configuration */ +/* + * Return POSIX permission bits, regardless of core.ignorecygwinfstricks + */ +int cygwin_get_st_mode_bits(const char *path, int *mode) +{ + struct stat st; + if (lstat(path, &st) < 0) + return -1; + *mode = st.st_mode; + return 0; +} + static inline void filetime_to_timespec(const FILETIME *ft, struct timespec *ts) { long long winTime = ((long long)ft->dwHighDateTime << 32) + diff --git a/compat/cygwin.h b/compat/cygwin.h index a3229f5b4f..c04965a2e0 100644 --- a/compat/cygwin.h +++ b/compat/cygwin.h @@ -4,6 +4,11 @@ typedef int (*stat_fn_t)(const char*, struct stat*); extern stat_fn_t cygwin_stat_fn; extern stat_fn_t cygwin_lstat_fn; +int cygwin_get_st_mode_bits(const char *path, int *mode); +#define get_st_mode_bits(p,m) cygwin_get_st_mode_bits((p),(m)) +#ifndef CYGWIN_C +/* cygwin.c needs the original lstat() */ #define stat(path, buf) (*cygwin_stat_fn)(path, buf) #define lstat(path, buf) (*cygwin_lstat_fn)(path, buf) +#endif diff --git a/git-compat-util.h b/git-compat-util.h index 90e0372038..cde442fb5f 100644 --- a/git-compat-util.h +++ b/git-compat-util.h @@ -163,6 +163,7 @@ typedef long intptr_t; typedef unsigned long uintptr_t; #endif +int get_st_mode_bits(const char *path, int *mode); #if defined(__CYGWIN__) #undef _XOPEN_SOURCE #include diff --git a/path.c b/path.c index d3d3f8b8ad..2fdccc2f18 100644 --- a/path.c +++ b/path.c @@ -14,6 +14,22 @@ #include "strbuf.h" #include "string-list.h" +#ifndef get_st_mode_bits +/* + * The replacement lstat(2) we use on Cygwin is incomplete and + * may return wrong permission bits. Most of the time we do not care, + * but the callsites of this wrapper do care. + */ +int get_st_mode_bits(const char *path, int *mode) +{ + struct stat st; + if (lstat(path, &st) < 0) + return -1; + *mode = st.st_mode; + return 0; +} +#endif + static char bad_path[] = "/bad-path/"; static char *get_pathname(void) @@ -391,7 +407,6 @@ const char *enter_repo(const char *path, int strict) int set_shared_perm(const char *path, int mode) { - struct stat st; int tweak, shared, orig_mode; if (!shared_repository) { @@ -400,9 +415,8 @@ int set_shared_perm(const char *path, int mode) return 0; } if (!mode) { - if (lstat(path, &st) < 0) + if (get_st_mode_bits(path, &mode) < 0) return -1; - mode = st.st_mode; orig_mode = mode; } else orig_mode = 0; -- 2.47.1