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use rename() if the underlying filesystem doesn't support link()

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This commit is contained in:
Greg Alexander 2014-12-16 22:24:34 -05:00
parent 97533c8574
commit 25b613c4f5
1 changed files with 2 additions and 2 deletions
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4
dropbear/svr-kex.c
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@ -134,10 +134,10 @@ static void svr_ensure_hostkey() {
if (link(fn_temp, fn) < 0) { if (link(fn_temp, fn) < 0) {
/* It's OK to get EEXIST - we probably just lost a race /* It's OK to get EEXIST - we probably just lost a race
with another connection to generate the key */ with another connection to generate the key */
if (errno != EEXIST) { /* fallback to rename() if the fs doesn't support link() */
if ((errno != EEXIST) && (rename(fn_temp, fn) < 0)) {
dropbear_log(LOG_ERR, "Failed moving key file to %s: %s", fn, dropbear_log(LOG_ERR, "Failed moving key file to %s: %s", fn,
strerror(errno)); strerror(errno));
/* XXX fallback to non-atomic copy for some filesystems? */
goto out; goto out;
} }
} }