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glibc/pwd/fgetpwent_r.c
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/* Copyright (C) 1991-2016 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 <stdio.h> | |
#include <pwd.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 passwd | |
#define ENTNAME pwent | |
struct pwent_data {}; | |
#include <nss/nss_files/files-parse.c> | |
LINE_PARSER | |
(, | |
STRING_FIELD (result->pw_name, ISCOLON, 0); | |
if (line[0] == '\0' | |
&& (result->pw_name[0] == '+' || result->pw_name[0] == '-')) | |
{ | |
/* This a special case. We allow lines containing only a `+' sign | |
since this is used for nss_compat. All other services will | |
reject this entry later. Initialize all other fields now. */ | |
result->pw_passwd = NULL; | |
result->pw_uid = 0; | |
result->pw_gid = 0; | |
result->pw_gecos = NULL; | |
result->pw_dir = NULL; | |
result->pw_shell = NULL; | |
} | |
else | |
{ | |
STRING_FIELD (result->pw_passwd, ISCOLON, 0); | |
if (result->pw_name[0] == '+' || result->pw_name[0] == '-') | |
{ | |
INT_FIELD_MAYBE_NULL (result->pw_uid, ISCOLON, 0, 10, , 0) | |
INT_FIELD_MAYBE_NULL (result->pw_gid, ISCOLON, 0, 10, , 0) | |
} | |
else | |
{ | |
INT_FIELD (result->pw_uid, ISCOLON, 0, 10,) | |
INT_FIELD (result->pw_gid, ISCOLON, 0, 10,) | |
} | |
STRING_FIELD (result->pw_gecos, ISCOLON, 0); | |
STRING_FIELD (result->pw_dir, ISCOLON, 0); | |
result->pw_shell = line; | |
} | |
) | |
/* Read one entry from the given stream. */ | |
int | |
__fgetpwent_r (FILE *stream, struct passwd *resbuf, char *buffer, | |
size_t buflen, struct passwd **result) | |
{ | |
char *p; | |
flockfile (stream); | |
do | |
{ | |
buffer[buflen - 1] = '\xff'; | |
p = fgets_unlocked (buffer, buflen, stream); | |
if (p == NULL && feof_unlocked (stream)) | |
{ | |
funlockfile (stream); | |
*result = NULL; | |
__set_errno (ENOENT); | |
return errno; | |
} | |
if (p == NULL || 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_line (p, resbuf, (void *) buffer, buflen, &errno)); | |
funlockfile (stream); | |
*result = resbuf; | |
return 0; | |
} | |
weak_alias (__fgetpwent_r, fgetpwent_r) |