Merge of r4983: crypt_r() error handling fixed. The crypt_r() function returns NULL on errors, check it explicitly instead of assuming errno will remain 0 if there are no errors (per POSIX, the setting of errno after a successful call to a function is unspecified unless the description of that function specifies that errno shall not be modified). Additionally, dropped unneeded ngx_set_errno(0) and fixed error handling of memory allocation after normal crypt(), which was inapropriate and resulted in null pointer dereference on allocation failures.

/*
 * Copyright (C) Igor Sysoev
 * Copyright (C) Nginx, Inc.
 */


#ifndef _NGX_USER_H_INCLUDED_
#define _NGX_USER_H_INCLUDED_


#include <ngx_config.h>
#include <ngx_core.h>


typedef uid_t  ngx_uid_t;
typedef gid_t  ngx_gid_t;


ngx_int_t ngx_libc_crypt(ngx_pool_t *pool, u_char *key, u_char *salt,
    u_char **encrypted);


#endif /* _NGX_USER_H_INCLUDED_ */