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Add lock and unlock functions.

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git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@2669 ec53bebd-3082-4978-b11e-865c3cabbd6b
This commit is contained in:
Johan Danielsson
1997-08-01 14:52:26 +00:00
parent ed246a1896
commit 2a76e42940
1 changed files with 27 additions and 1 deletions
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28
lib/hdb/hdb.c
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@@ -158,13 +158,39 @@ hdb_etype2key(krb5_context context,
return hdb_next_etype2key(context,e, etype, key);
}
krb5_error_code
hdb_lock(int fd, int operation)
{
int i, code;
for(i = 0; i < 3; i++){
code = flock(fd, (operation == HDB_RLOCK ? LOCK_SH : LOCK_EX) | LOCK_NB);
if(code == 0 || errno != EWOULDBLOCK)
break;
sleep(1);
}
if(code == 0)
return 0;
if(errno == EWOULDBLOCK)
return HDB_ERR_DB_INUSE;
return HDB_ERR_CANT_LOCK_DB;
}
krb5_error_code
hdb_unlock(int fd)
{
int code;
code = flock(fd, LOCK_UN);
if(code)
return 4711 /* XXX */;
return 0;
}
void
hdb_free_entry(krb5_context context, hdb_entry *ent)
{
free_hdb_entry(ent);
}
krb5_error_code