diff options
Diffstat (limited to 'REORG.TODO/grp/fgetgrent_r.c')
-rw-r--r-- | REORG.TODO/grp/fgetgrent_r.c | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/REORG.TODO/grp/fgetgrent_r.c b/REORG.TODO/grp/fgetgrent_r.c new file mode 100644 index 0000000000..5a4107ba9c --- /dev/null +++ b/REORG.TODO/grp/fgetgrent_r.c @@ -0,0 +1,107 @@ +/* Copyright (C) 1991-2017 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 + <http://www.gnu.org/licenses/>. */ + +#include <ctype.h> +#include <errno.h> +#include <grp.h> +#include <stdio.h> + +#include <libio/iolibio.h> +#define flockfile(s) _IO_flockfile (s) +#define funlockfile(s) _IO_funlockfile (s) + +/* Define a line parsing function using the common code + used in the nss_files module. */ + +#define STRUCTURE group +#define ENTNAME grent +struct grent_data {}; + +#define TRAILING_LIST_MEMBER gr_mem +#define TRAILING_LIST_SEPARATOR_P(c) ((c) == ',') +#include <nss/nss_files/files-parse.c> +LINE_PARSER +(, + STRING_FIELD (result->gr_name, ISCOLON, 0); + if (line[0] == '\0' + && (result->gr_name[0] == '+' || result->gr_name[0] == '-')) + { + result->gr_passwd = NULL; + result->gr_gid = 0; + } + else + { + STRING_FIELD (result->gr_passwd, ISCOLON, 0); + if (result->gr_name[0] == '+' || result->gr_name[0] == '-') + INT_FIELD_MAYBE_NULL (result->gr_gid, ISCOLON, 0, 10, , 0) + else + INT_FIELD (result->gr_gid, ISCOLON, 0, 10,) + } + ) + + +/* Read one entry from the given stream. */ +int +__fgetgrent_r (FILE *stream, struct group *resbuf, char *buffer, size_t buflen, + struct group **result) +{ + char *p; + int parse_result; + + flockfile (stream); + do + { + buffer[buflen - 1] = '\xff'; + p = fgets_unlocked (buffer, buflen, stream); + if (__builtin_expect (p == NULL, 0) && feof_unlocked (stream)) + { + funlockfile (stream); + *result = NULL; + __set_errno (ENOENT); + return errno; + } + if (__builtin_expect (p == NULL, 0) || buffer[buflen - 1] != '\xff') + { + funlockfile (stream); + *result = NULL; + __set_errno (ERANGE); + return errno; + } + + /* Skip leading blanks. */ + while (isspace (*p)) + ++p; + } while (*p == '\0' || *p == '#' /* Ignore empty and comment lines. */ + /* Parse the line. If it is invalid, loop to + get the next line of the file to parse. */ + || ! (parse_result = parse_line (p, resbuf, + (void *) buffer, buflen, + &errno))); + + funlockfile (stream); + + if (__builtin_expect (parse_result, 0) == -1) + { + /* The parser ran out of space. */ + *result = NULL; + return errno; + } + + *result = resbuf; + return 0; +} +weak_alias (__fgetgrent_r, fgetgrent_r) |