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| author | Kien Nguyen <kien.n.quang@gmail.com> | 2022-08-24 23:19:35 +0900 |
|---|---|---|
| committer | Eli Zaretskii <eliz@gnu.org> | 2022-08-25 16:18:58 +0300 |
| commit | 34e0a232cd0e7b38a33bc9134134c47665aeb185 (patch) | |
| tree | b8f621d8237dfb3d0d3421ba4412dd16dbd4c2fb /src | |
| parent | b28b2cefaea0d7846ab9a45dc92f68ad00e92085 (diff) | |
| download | emacs-34e0a232cd0e7b38a33bc9134134c47665aeb185.tar.gz | |
Allow symlink creation on MS-Windows without Administrator privileges
* src/w32.c (symlink): Use the
SYMBOLIC_LINK_FLAG_ALLOW_UNPRIVILEGED_CREATE flag when available.
(Bug#57386)
Diffstat (limited to 'src')
| -rw-r--r-- | src/w32.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/src/w32.c b/src/w32.c index cbcfcdd4f6d..44c279602cf 100644 --- a/src/w32.c +++ b/src/w32.c @@ -5992,12 +5992,22 @@ sys_umask (int mode) #ifndef SYMBOLIC_LINK_FLAG_DIRECTORY #define SYMBOLIC_LINK_FLAG_DIRECTORY 0x1 #endif +#ifndef SYMBOLIC_LINK_FLAG_ALLOW_UNPRIVILEGED_CREATE +#define SYMBOLIC_LINK_FLAG_ALLOW_UNPRIVILEGED_CREATE 0x2 +#endif int symlink (char const *filename, char const *linkname) { char linkfn[MAX_UTF8_PATH], *tgtfn; - DWORD flags = 0; + /* The SYMBOLIC_LINK_FLAG_ALLOW_UNPRIVILEGED_CREATE flag is + supported from Windows 10 build 14972. It is only supported if + Developer Mode is enabled, and is ignored if it isn't. */ + DWORD flags = + (os_subtype == OS_SUBTYPE_NT + && (w32_major_version > 10 + || (w32_major_version == 10 && w32_build_number >= 14972))) + ? SYMBOLIC_LINK_FLAG_ALLOW_UNPRIVILEGED_CREATE : 0; int dir_access, filename_ends_in_slash; /* Diagnostics follows Posix as much as possible. */ @@ -6055,7 +6065,7 @@ symlink (char const *filename, char const *linkname) directory. */ filename_ends_in_slash = IS_DIRECTORY_SEP (filename[strlen (filename) - 1]); if (dir_access == 0 || filename_ends_in_slash) - flags = SYMBOLIC_LINK_FLAG_DIRECTORY; + flags |= SYMBOLIC_LINK_FLAG_DIRECTORY; tgtfn = (char *)map_w32_filename (filename, NULL); if (filename_ends_in_slash) |