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glibc/nis/nss_nisplus/nisplus-parser.c

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/* Copyright (C) 1997, 1999 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Thorsten Kukuk <kukuk@vt.uni-paderborn.de>, 1997.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include <pwd.h>
#include <ctype.h>
#include <errno.h>
#include <string.h>
#include <rpcsvc/nis.h>
#include "nisplus-parser.h"
#define NISENTRYVAL(idx,col,res) \
((res)->objects.objects_val[(idx)].EN_data.en_cols.en_cols_val[(col)].ec_value.ec_value_val)
#define NISENTRYLEN(idx,col,res) \
((res)->objects.objects_val[(idx)].EN_data.en_cols.en_cols_val[(col)].ec_value.ec_value_len)
int
_nss_nisplus_parse_pwent (nis_result *result, struct passwd *pw,
char *buffer, size_t buflen, int *errnop)
{
char *first_unused = buffer;
size_t room_left = buflen;
size_t len;
if (result == NULL)
return 0;
if ((result->status != NIS_SUCCESS && result->status != NIS_S_SUCCESS)
|| result->objects.objects_len != 1
|| __type_of (result->objects.objects_val) != NIS_ENTRY_OBJ
|| strcmp (result->objects.objects_val->EN_data.en_type,
"passwd_tbl") != 0
|| result->objects.objects_val->EN_data.en_cols.en_cols_len < 7)
return 0;
if (NISENTRYLEN (0, 0, result) >= room_left)
{
/* The line is too long for our buffer. */
no_more_room:
*errnop = ERANGE;
return -1;
}
strncpy (first_unused, NISENTRYVAL (0, 0, result),
NISENTRYLEN (0, 0, result));
first_unused[NISENTRYLEN (0, 0, result)] = '\0';
len = strlen (first_unused);
if (len == 0) /* No name ? Should never happen, database is corrupt */
return 0;
pw->pw_name = first_unused;
room_left -= (len + 1);
first_unused += (len + 1);
if (NISENTRYLEN (0, 1, result) >= room_left)
goto no_more_room;
strncpy (first_unused, NISENTRYVAL (0, 1, result),
NISENTRYLEN (0, 1, result));
first_unused[NISENTRYLEN (0, 1, result)] = '\0';
pw->pw_passwd = first_unused;
len = strlen (first_unused);
room_left -= (len + 1);
first_unused += (len + 1);
if (NISENTRYLEN(0, 2, result) >= room_left)
goto no_more_room;
strncpy (first_unused, NISENTRYVAL (0, 2, result),
NISENTRYLEN (0, 2, result));
first_unused[NISENTRYLEN (0, 2, result)] = '\0';
len = strlen (first_unused);
if (len == 0) /* If we don't have a uid, it's an invalid shadow entry */
return 0;
pw->pw_uid = atoi (first_unused);
room_left -= (len + 1);
first_unused += (len + 1);
if (NISENTRYLEN (0, 3, result) >= room_left)
goto no_more_room;
strncpy (first_unused, NISENTRYVAL (0, 3, result),
NISENTRYLEN (0, 3, result));
first_unused[NISENTRYLEN (0, 3, result)] = '\0';
len = strlen (first_unused);
if (len == 0) /* If we don't have a gid, it's an invalid shadow entry */
return 0;
pw->pw_gid = atoi (first_unused);
room_left -= (len + 1);
first_unused += (len + 1);
if (NISENTRYLEN(0, 4, result) >= room_left)
goto no_more_room;
strncpy (first_unused, NISENTRYVAL (0, 4, result),
NISENTRYLEN (0, 4, result));
first_unused[NISENTRYLEN (0, 4, result)] = '\0';
pw->pw_gecos = first_unused;
len = strlen (first_unused);
room_left -= (len + 1);
first_unused += (len + 1);
if (NISENTRYLEN (0, 5, result) >= room_left)
goto no_more_room;
strncpy (first_unused, NISENTRYVAL (0, 5, result),
NISENTRYLEN (0, 5, result));
first_unused[NISENTRYLEN (0, 5, result)] = '\0';
pw->pw_dir = first_unused;
len = strlen (first_unused);
room_left -= (len + 1);
first_unused += (len + 1);
if (NISENTRYLEN (0, 6, result) >= room_left)
goto no_more_room;
strncpy (first_unused, NISENTRYVAL (0, 6, result),
NISENTRYLEN (0, 6, result));
first_unused[NISENTRYLEN (0, 6, result)] = '\0';
pw->pw_shell = first_unused;
len = strlen (first_unused);
room_left -= (len + 1);
first_unused += (len + 1);
return 1;
}
int
_nss_nisplus_parse_grent (nis_result *result, u_long entry, struct group *gr,
char *buffer, size_t buflen, int *errnop)
{
char *first_unused = buffer;
size_t room_left = buflen;
char *line;
int count;
size_t len;
if (result == NULL)
return 0;
if ((result->status != NIS_SUCCESS && result->status != NIS_S_SUCCESS)
|| __type_of(result->objects.objects_val) != NIS_ENTRY_OBJ
|| strcmp (result->objects.objects_val[entry].EN_data.en_type,
"group_tbl") != 0
|| result->objects.objects_val[entry].EN_data.en_cols.en_cols_len < 4)
return 0;
if (NISENTRYLEN (entry, 0, result) >= room_left)
{
/* The line is too long for our buffer. */
no_more_room:
*errnop = ERANGE;
return -1;
}
strncpy (first_unused, NISENTRYVAL (entry, 0, result),
NISENTRYLEN (entry, 0, result));
first_unused[NISENTRYLEN (entry, 0, result)] = '\0';
len = strlen (first_unused);
if (len == 0) /* group table is corrupt */
return 0;
gr->gr_name = first_unused;
room_left -= (len + 1);
first_unused += (len + 1);
if (NISENTRYLEN (entry, 1, result) >= room_left)
goto no_more_room;
strncpy (first_unused, NISENTRYVAL (entry, 1, result),
NISENTRYLEN (entry, 1, result));
first_unused[NISENTRYLEN (entry, 1, result)] = '\0';
gr->gr_passwd = first_unused;
len = strlen (first_unused);
room_left -= (len + 1);
first_unused += (len + 1);
if (NISENTRYLEN (entry, 2, result) >= room_left)
goto no_more_room;
strncpy (first_unused, NISENTRYVAL (entry, 2, result),
NISENTRYLEN (entry, 2, result));
first_unused[NISENTRYLEN (entry, 2, result)] = '\0';
len = strlen (first_unused);
if (len == 0) /* We should always have an gid */
return 0;
gr->gr_gid = atoi (first_unused);
room_left -= (strlen (first_unused) + 1);
first_unused += strlen (first_unused) + 1;
if (NISENTRYLEN (entry, 3, result) >= room_left)
goto no_more_room;
strncpy (first_unused, NISENTRYVAL (entry, 3, result),
NISENTRYLEN (entry, 3, result));
first_unused[NISENTRYLEN (entry, 3, result)] = '\0';
line = first_unused;
len = strlen (line);
room_left -= (len + 1);
first_unused += (len + 1);
/* Adjust the pointer so it is aligned for
storing pointers. */
first_unused += __alignof__ (char *) - 1;
first_unused -= ((first_unused - (char *) 0) % __alignof__ (char *));
gr->gr_mem = (char **) first_unused;
count = 0;
while (*line != '\0')
{
/* Skip leading blanks. */
while (isspace (*line))
++line;
if (*line == '\0')
break;
if (room_left < sizeof (char *))
goto no_more_room;
room_left -= sizeof (char *);
gr->gr_mem[count++] = line;
while (*line != '\0' && *line != ',' && !isspace (*line))
++line;
if (*line == ',' || isspace (*line))
{
int is = isspace (*line);
*line = '\0';
if (is)
while (*line != '\0' && (*line == ',' || isspace (*line)))
++line;
else
++line;
}
}
if (room_left < sizeof (char *))
goto no_more_room;
room_left -= sizeof (char *);
gr->gr_mem[count] = NULL;
return 1;
}
int
_nss_nisplus_parse_spent (nis_result *result, struct spwd *sp,
char *buffer, size_t buflen, int *errnop)
{
char *first_unused = buffer;
size_t room_left = buflen;
size_t len;
if (result == NULL)
return 0;
if ((result->status != NIS_SUCCESS && result->status != NIS_S_SUCCESS)
|| result->objects.objects_len != 1
|| __type_of(result->objects.objects_val) != NIS_ENTRY_OBJ
|| strcmp (result->objects.objects_val->EN_data.en_type,
"passwd_tbl") != 0
|| result->objects.objects_val[0].EN_data.en_cols.en_cols_len < 8)
return 0;
if (NISENTRYLEN (0, 0, result) >= room_left)
{
/* The line is too long for our buffer. */
no_more_room:
*errnop = ERANGE;
return -1;
}
strncpy (first_unused, NISENTRYVAL (0, 0, result),
NISENTRYLEN (0, 0, result));
first_unused[NISENTRYLEN (0, 0, result)] = '\0';
len = strlen (first_unused);
if (len == 0)
return 0;
sp->sp_namp = first_unused;
room_left -= (len + 1);
first_unused += (len + 1);
if (NISENTRYLEN (0, 1, result) >= room_left)
goto no_more_room;
strncpy (first_unused, NISENTRYVAL (0, 1, result),
NISENTRYLEN (0, 1, result));
first_unused[NISENTRYLEN (0, 1, result)] = '\0';
sp->sp_pwdp = first_unused;
len = strlen (first_unused);
room_left -= (len + 1);
first_unused += (len + 1);
sp->sp_lstchg = sp->sp_min = sp->sp_max = sp->sp_warn = sp->sp_inact =
sp->sp_expire = -1;
sp->sp_flag = ~0ul;
if (NISENTRYLEN (0, 7, result) > 0)
{
char *line, *cp;
line = NISENTRYVAL (0, 7, result);
cp = strchr (line, ':');
if (cp == NULL)
return 1;
*cp++ = '\0';
if (*line)
sp->sp_lstchg = atol (line);
line = cp;
cp = strchr (line, ':');
if (cp == NULL)
return 1;
*cp++ = '\0';
if (*line)
sp->sp_min = atol (line);
line = cp;
cp = strchr (line, ':');
if (cp == NULL)
return 1;
*cp++ = '\0';
if (*line)
sp->sp_max = atol (line);
line = cp;
cp = strchr (line, ':');
if (cp == NULL)
return 1;
*cp++ = '\0';
if (*line)
sp->sp_warn = atol (line);
line = cp;
cp = strchr (line, ':');
if (cp == NULL)
return 1;
*cp++ = '\0';
if (*line)
sp->sp_inact = atol (line);
line = cp;
cp = strchr (line, ':');
if (cp == NULL)
return 1;
*cp++ = '\0';
if (*line)
sp->sp_expire = atol (line);
line = cp;
if (line == NULL)
return 1;
if (*line)
sp->sp_flag = atol (line);
}
return 1;
}
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