mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-29 00:01:12 +00:00
bdee910e88
And helper functions __nss_readline, __nss_readline_seek, __nss_parse_line_result. This consolidates common code for handling overlong lines and parse files. Use the new functionality in internal_getent in nss/nss_files/files-XXX.c. Tested-by: Carlos O'Donell <carlos@redhat.com> Reviewed-by: Carlos O'Donell <carlos@redhat.com>
85 lines
3.7 KiB
C
85 lines
3.7 KiB
C
/* Internal routines for nss_files.
|
|
Copyright (C) 2020 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 */
|