Instead of using a PATH_MAX-sized buffer, which can be too small on some
file systems, use strbuf_getcwd(), which handles any path getcwd()
returns. Also preserve the errno set by strbuf_getcwd() instead of
setting it to ENAMETOOLONG; that way a more appropriate error message
can be shown based on the actual reason for failing.
Signed-off-by: Rene Scharfe <l.s.r@xxxxxx>
---
unix-socket.c | 14 +++++++-------
1 file changed, 7 insertions(+), 7 deletions(-)
diff --git a/unix-socket.c b/unix-socket.c
index 91bd6b8..19ed48b 100644
--- a/unix-socket.c
+++ b/unix-socket.c
@@ -18,12 +18,12 @@ static int chdir_len(const char *orig, int len)
}
struct unix_sockaddr_context {
- char orig_dir[PATH_MAX];
+ char *orig_dir;
};
static void unix_sockaddr_cleanup(struct unix_sockaddr_context *ctx)
{
- if (!ctx->orig_dir[0])
+ if (!ctx->orig_dir)
return;
/*
* If we fail, we can't just return an error, since we have
@@ -32,6 +32,7 @@ static void unix_sockaddr_cleanup(struct unix_sockaddr_context *ctx)
*/
if (chdir(ctx->orig_dir) < 0)
die("unable to restore original working directory");
+ free(ctx->orig_dir);
}
static int unix_sockaddr_init(struct sockaddr_un *sa, const char *path,
@@ -39,10 +40,11 @@ static int unix_sockaddr_init(struct sockaddr_un *sa, const char *path,
{
int size = strlen(path) + 1;
- ctx->orig_dir[0] = '\0';
+ ctx->orig_dir = NULL;
if (size > sizeof(sa->sun_path)) {
const char *slash = find_last_dir_sep(path);
const char *dir;
+ struct strbuf cwd = STRBUF_INIT;
if (!slash) {
errno = ENAMETOOLONG;
@@ -56,11 +58,9 @@ static int unix_sockaddr_init(struct sockaddr_un *sa, const char *path,
errno = ENAMETOOLONG;
return -1;
}
-
- if (!getcwd(ctx->orig_dir, sizeof(ctx->orig_dir))) {
- errno = ENAMETOOLONG;
+ if (strbuf_getcwd(&cwd))
return -1;
- }
+ ctx->orig_dir = strbuf_detach(&cwd, NULL);
if (chdir_len(dir, slash - dir) < 0)
return -1;
}
--
2.0.2
--
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