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(kadm5_log_previous): catch errors instead of asserting and set error string.

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git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@15969 ec53bebd-3082-4978-b11e-865c3cabbd6b
This commit is contained in:
Love Hörnquist Åstrand
2005-08-24 14:26:23 +00:00
parent 08d4557928
commit f634448adf
1 changed files with 33 additions and 10 deletions
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43
lib/kadm5/log.c
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@@ -1,5 +1,5 @@
/*
* Copyright (c) 1997 - 2003 Kungliga Tekniska H<>gskolan
* Copyright (c) 1997 - 2005 Kungliga Tekniska H<>gskolan
* (Royal Institute of Technology, Stockholm, Sweden).
* All rights reserved.
*
@@ -772,31 +772,54 @@ kadm5_log_goto_end (int fd)
*/
kadm5_ret_t
kadm5_log_previous (krb5_storage *sp,
kadm5_log_previous (krb5_context context,
krb5_storage *sp,
u_int32_t *ver,
time_t *timestamp,
enum kadm_ops *op,
u_int32_t *len)
{
krb5_error_code ret;
off_t off;
int32_t tmp;
krb5_storage_seek(sp, -8, SEEK_CUR);
krb5_ret_int32 (sp, &tmp);
ret = krb5_ret_int32 (sp, &tmp);
if (ret)
goto end_of_storage;
*len = tmp;
krb5_ret_int32 (sp, &tmp);
ret = krb5_ret_int32 (sp, &tmp);
*ver = tmp;
off = 24 + *len;
krb5_storage_seek(sp, -off, SEEK_CUR);
krb5_ret_int32 (sp, &tmp);
assert(tmp == *ver);
krb5_ret_int32 (sp, &tmp);
ret = krb5_ret_int32 (sp, &tmp);
if (ret)
goto end_of_storage;
if (tmp != *ver) {
krb5_set_error_string(context, "kadm5_log_previous: log entry "
"have consistency failure, version number wrong");
return KADM5_BAD_DB;
}
ret = krb5_ret_int32 (sp, &tmp);
if (ret)
goto end_of_storage;
*timestamp = tmp;
krb5_ret_int32 (sp, &tmp);
ret = krb5_ret_int32 (sp, &tmp);
*op = tmp;
krb5_ret_int32 (sp, &tmp);
assert(tmp == *len);
ret = krb5_ret_int32 (sp, &tmp);
if (ret)
goto end_of_storage;
if (tmp != *ver) {
krb5_set_error_string(context, "kadm5_log_previous: log entry "
"have consistency failure, length wrong");
return KADM5_BAD_DB;
}
return 0;
end_of_storage:
krb5_set_error_string(context, "kadm5_log_previous: end of storage "
"reached before end");
return ret;
}
/*