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create_symref: if symlink fails, fall back to writing a "symbolic ref"

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There are filesystems out there which do not understand symlinks, even if
the OS is perfectly capable of writing them. So, do not fail right away,
but try to write a symbolic ref first. If that fails, you can die().

Signed-off-by: Johannes Schindelin <Johannes.Schindelin@gmx.de>
Signed-off-by: Junio C Hamano <junkio@cox.net>
This commit is contained in:
Johannes Schindelin 2005-10-26 01:40:31 +02:00 committed by Junio C Hamano
parent f89ad67fb0
commit 303958dc42
1 changed files with 7 additions and 5 deletions
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12
refs.c
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@ -116,14 +116,17 @@ const char *resolve_ref(const char *path, unsigned char *sha1, int reading)
int create_symref(const char *git_HEAD, const char *refs_heads_master) int create_symref(const char *git_HEAD, const char *refs_heads_master)
{ {
#if USE_SYMLINK_HEAD
unlink(git_HEAD);
return symlink(refs_heads_master, git_HEAD);
#else
const char *lockpath; const char *lockpath;
char ref[1000]; char ref[1000];
int fd, len, written; int fd, len, written;
#if USE_SYMLINK_HEAD
unlink(git_HEAD);
if (!symlink(refs_heads_master, git_HEAD))
return 0;
fprintf(stderr, "no symlink - falling back to symbolic ref\n");
#endif
len = snprintf(ref, sizeof(ref), "ref: %s\n", refs_heads_master); len = snprintf(ref, sizeof(ref), "ref: %s\n", refs_heads_master);
if (sizeof(ref) <= len) { if (sizeof(ref) <= len) {
error("refname too long: %s", refs_heads_master); error("refname too long: %s", refs_heads_master);
@ -144,7 +147,6 @@ int create_symref(const char *git_HEAD, const char *refs_heads_master)
return -3; return -3;
} }
return 0; return 0;
#endif
} }
int read_ref(const char *filename, unsigned char *sha1) int read_ref(const char *filename, unsigned char *sha1)