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/* Internal routines for nss_files.
Copyright (C) 2020-2021 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#ifndef _NSS_FILES_H
#define _NSS_FILES_H
#include <stdio.h>
/* Open PATH for reading, as a data source for nss_files. */
FILE *__nss_files_fopen (const char *path);
libc_hidden_proto (__nss_files_fopen)
/* Read a line from FP, storing it BUF. Strip leading blanks and skip
comments. Sets errno and returns error code on failure. Special
failure: ERANGE means the buffer is too small. The function writes
the original offset to *POFFSET (which can be negative in the case
of non-seekable input). */
int __nss_readline (FILE *fp, char *buf, size_t len, off64_t *poffset);
libc_hidden_proto (__nss_readline)
/* Seek FP to OFFSET. Sets errno and returns error code on failure.
On success, sets errno to ERANGE and returns ERANGE (to indicate
re-reading of the same input line to the caller). If OFFSET is
negative, fail with ESPIPE without seeking. Intended to be used
after parsing data read by __nss_readline failed with ERANGE. */
int __nss_readline_seek (FILE *fp, off64_t offset) attribute_hidden;
/* Handles the result of a parse_line call (as defined by
nss/nss_files/files-parse.c). Adjusts the file offset of FP as
necessary. Returns 0 on success, and updates errno on failure (and
returns that error code). */
int __nss_parse_line_result (FILE *fp, off64_t offset, int parse_line_result);
libc_hidden_proto (__nss_parse_line_result)
struct parser_data;
/* Instances of the parse_line function from
nss/nss_files/files-parse.c. */
typedef int nss_files_parse_line (char *line, void *result,
struct parser_data *data,
size_t datalen, int *errnop);
extern nss_files_parse_line _nss_files_parse_etherent;
extern nss_files_parse_line _nss_files_parse_grent;
extern nss_files_parse_line _nss_files_parse_netent;
extern nss_files_parse_line _nss_files_parse_protoent;
extern nss_files_parse_line _nss_files_parse_pwent;
extern nss_files_parse_line _nss_files_parse_rpcent;
extern nss_files_parse_line _nss_files_parse_servent;
extern nss_files_parse_line _nss_files_parse_sgent;
extern nss_files_parse_line _nss_files_parse_spent;
libnss_files_hidden_proto (_nss_files_parse_etherent)
libc_hidden_proto (_nss_files_parse_grent)
libnss_files_hidden_proto (_nss_files_parse_netent)
libnss_files_hidden_proto (_nss_files_parse_protoent)
libc_hidden_proto (_nss_files_parse_pwent)
libnss_files_hidden_proto (_nss_files_parse_rpcent)
libnss_files_hidden_proto (_nss_files_parse_servent)
libc_hidden_proto (_nss_files_parse_sgent)
libc_hidden_proto (_nss_files_parse_spent)
/* Generic implementation of fget*ent_r. Reads lines from FP until
EOF or a successful parse into *RESULT using PARSER. Returns 0 on
success, ENOENT on EOF, ERANGE on too-small buffer. */
int __nss_fgetent_r (FILE *fp, void *result,
char *buffer, size_t buffer_length,
nss_files_parse_line parser) attribute_hidden;
#endif /* _NSS_FILES_H */
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