mingw: implement basic `symlink()` functionality (file symlinks only)
Implement `symlink()`. This implementation always creates _file_ symlinks (remember: Windows discerns between symlinks pointing to directories and those pointing to files). Support for directory symlinks will be added in a subseqeuent commit. This implementation fails with `ENOSYS` if symlinks are disabled or unsupported. Signed-off-by: Karsten Blees <karsten.blees@gmail.com> Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Karsten Blees committed
Jan 9, 2026 at 20:05 UTC
593008b95dfd4898f182d664d6b162c7590b4028
2 files changed
+29
-2
compat/mingw-posix.h
+1
-2
@@ -121,8 +121,6 @@ struct utsname {
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* trivial stubs
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*/
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-static inline int symlink(const char *oldpath UNUSED, const char *newpath UNUSED)
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-{ errno = ENOSYS; return -1; }
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static inline int fchmod(int fildes UNUSED, mode_t mode UNUSED)
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{ errno = ENOSYS; return -1; }
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#ifndef __MINGW64_VERSION_MAJOR
@@ -195,6 +193,7 @@ int setitimer(int type, struct itimerval *in, struct itimerval *out);
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int sigaction(int sig, struct sigaction *in, struct sigaction *out);
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int link(const char *oldpath, const char *newpath);
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int uname(struct utsname *buf);
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+int symlink(const char *target, const char *link);
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int readlink(const char *path, char *buf, size_t bufsiz);
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/*
compat/mingw.c
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@@ -2698,6 +2698,34 @@ int link(const char *oldpath, const char *newpath)
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return 0;
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}
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+int symlink(const char *target, const char *link)
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+{
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+ wchar_t wtarget[MAX_PATH], wlink[MAX_PATH];
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+ int len;
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+
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+ /* fail if symlinks are disabled or API is not supported (WinXP) */
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+ if (!has_symlinks) {
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+ errno = ENOSYS;
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+ return -1;
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+ }
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+
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+ if ((len = xutftowcs_path(wtarget, target)) < 0
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+ || xutftowcs_path(wlink, link) < 0)
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+ return -1;
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+
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+ /* convert target dir separators to backslashes */
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+ while (len--)
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+ if (wtarget[len] == '/')
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+ wtarget[len] = '\\';
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+
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+ /* create file symlink */
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+ if (!CreateSymbolicLinkW(wlink, wtarget, 0)) {
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+ errno = err_win_to_posix(GetLastError());
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+ return -1;
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+ }
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+ return 0;
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+}
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+
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int readlink(const char *path, char *buf, size_t bufsiz)
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{
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WCHAR wpath[MAX_PATH];