* Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")

/* $NetBSD: getpwent_r.c,v 1.1.1.2 2012/09/09 16:07:55 christos Exp $ */

/*
* Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
* Copyright (c) 1998-1999 by Internet Software Consortium.
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
* OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/

#if defined(LIBC_SCCS) && !defined(lint)
static const char rcsid[] = "Id: getpwent_r.c,v 1.8 2005/04/27 04:56:26 sra Exp ";
#endif /* LIBC_SCCS and not lint */

#include <port_before.h>
#if !defined(_REENTRANT) || !defined(DO_PTHREADS) || !defined(WANT_IRS_PW)
static int getpwent_r_not_required = 0;
#else
#include <errno.h>
#include <string.h>
#include <stdio.h>
#include <sys/types.h>
#if (defined(POSIX_GETPWNAM_R) || defined(POSIX_GETPWUID_R))
#if defined(_POSIX_PTHREAD_SEMANTICS)
/* turn off solaris remapping in <grp.h> */
#undef _POSIX_PTHREAD_SEMANTICS
#include <pwd.h>
#define _POSIX_PTHREAD_SEMANTICS 1
#else
#define _UNIX95 1
#include <pwd.h>
#endif
#else
#include <pwd.h>
#endif
#include <port_after.h>

#ifdef PASS_R_RETURN

static int
copy_passwd(struct passwd *, struct passwd *, char *buf, int buflen);

/* POSIX 1003.1c */
#ifdef POSIX_GETPWNAM_R
int
__posix_getpwnam_r(const char *login, struct passwd *pwptr,
char *buf, size_t buflen, struct passwd **result) {
#else
int
getpwnam_r(const char *login, struct passwd *pwptr,
char *buf, size_t buflen, struct passwd **result) {
#endif
struct passwd *pw = getpwnam(login);
int res;

if (pw == NULL) {
*result = NULL;
return (0);
}

res = copy_passwd(pw, pwptr, buf, buflen);
*result = res ? NULL : pwptr;
return (res);
}

#ifdef POSIX_GETPWNAM_R
struct passwd *
getpwnam_r(const char *login, struct passwd *pwptr, char *buf, int buflen) {
struct passwd *pw = getpwnam(login);
int res;

if (pw == NULL)
return (NULL);

res = copy_passwd(pw, pwptr, buf, buflen);
return (res ? NULL : pwptr);
}
#endif

/* POSIX 1003.1c */
#ifdef POSIX_GETPWUID_R
int
__posix_getpwuid_r(uid_t uid, struct passwd *pwptr,
char *buf, int buflen, struct passwd **result) {
#else
int
getpwuid_r(uid_t uid, struct passwd *pwptr,
char *buf, size_t buflen, struct passwd **result) {
#endif
struct passwd *pw = getpwuid(uid);
int res;

if (pw == NULL) {
*result = NULL;
return (0);
}

res = copy_passwd(pw, pwptr, buf, buflen);
*result = res ? NULL : pwptr;
return (res);
}

#ifdef POSIX_GETPWUID_R
struct passwd *
getpwuid_r(uid_t uid, struct passwd *pwptr, char *buf, int buflen) {
struct passwd *pw = getpwuid(uid);
int res;

if (pw == NULL)
return (NULL);

res = copy_passwd(pw, pwptr, buf, buflen);
return (res ? NULL : pwptr);
}
#endif

/*%
* These assume a single context is in operation per thread.
* If this is not the case we will need to call irs directly
* rather than through the base functions.
*/

PASS_R_RETURN
getpwent_r(struct passwd *pwptr, PASS_R_ARGS) {
struct passwd *pw = getpwent();
int res = 0;

if (pw == NULL)
return (PASS_R_BAD);

res = copy_passwd(pw, pwptr, buf, buflen);
return (res ? PASS_R_BAD : PASS_R_OK);
}

PASS_R_SET_RETURN
#ifdef PASS_R_ENT_ARGS
setpassent_r(int stayopen, PASS_R_ENT_ARGS)
#else
setpassent_r(int stayopen)
#endif
{

setpassent(stayopen);
#ifdef PASS_R_SET_RESULT
return (PASS_R_SET_RESULT);
#endif
}

PASS_R_SET_RETURN
#ifdef PASS_R_ENT_ARGS
setpwent_r(PASS_R_ENT_ARGS)
#else
setpwent_r(void)
#endif
{

setpwent();
#ifdef PASS_R_SET_RESULT
return (PASS_R_SET_RESULT);
#endif
}

PASS_R_END_RETURN
#ifdef PASS_R_ENT_ARGS
endpwent_r(PASS_R_ENT_ARGS)
#else
endpwent_r(void)
#endif
{

endpwent();
PASS_R_END_RESULT(PASS_R_OK);
}

#ifdef HAS_FGETPWENT
PASS_R_RETURN
fgetpwent_r(FILE *f, struct passwd *pwptr, PASS_R_COPY_ARGS) {
struct passwd *pw = fgetpwent(f);
int res = 0;

if (pw == NULL)
return (PASS_R_BAD);

res = copy_passwd(pw, pwptr, PASS_R_COPY);
return (res ? PASS_R_BAD : PASS_R_OK );
}
#endif

/* Private */

static int
copy_passwd(struct passwd *pw, struct passwd *pwptr, char *buf, int buflen) {
char *cp;
int n;
int len;

/* Find out the amount of space required to store the answer. */
len = strlen(pw->pw_name) + 1;
len += strlen(pw->pw_passwd) + 1;
#ifdef HAVE_PW_CLASS
len += strlen(pw->pw_class) + 1;
#endif
len += strlen(pw->pw_gecos) + 1;
len += strlen(pw->pw_dir) + 1;
len += strlen(pw->pw_shell) + 1;

if (len > buflen) {
errno = ERANGE;
return (ERANGE);
}

/* copy fixed atomic values*/
pwptr->pw_uid = pw->pw_uid;
pwptr->pw_gid = pw->pw_gid;
#ifdef HAVE_PW_CHANGE
pwptr->pw_change = pw->pw_change;
#endif
#ifdef HAVE_PW_EXPIRE
pwptr->pw_expire = pw->pw_expire;
#endif

cp = buf;

/* copy official name */
n = strlen(pw->pw_name) + 1;
strcpy(cp, pw->pw_name);
pwptr->pw_name = cp;
cp += n;

/* copy password */
n = strlen(pw->pw_passwd) + 1;
strcpy(cp, pw->pw_passwd);
pwptr->pw_passwd = cp;
cp += n;

#ifdef HAVE_PW_CLASS
/* copy class */
n = strlen(pw->pw_class) + 1;
strcpy(cp, pw->pw_class);
pwptr->pw_class = cp;
cp += n;
#endif

/* copy gecos */
n = strlen(pw->pw_gecos) + 1;
strcpy(cp, pw->pw_gecos);
pwptr->pw_gecos = cp;
cp += n;

/* copy directory */
n = strlen(pw->pw_dir) + 1;
strcpy(cp, pw->pw_dir);
pwptr->pw_dir = cp;
cp += n;

/* copy login shell */
n = strlen(pw->pw_shell) + 1;
strcpy(cp, pw->pw_shell);
pwptr->pw_shell = cp;
cp += n;

return (0);
}
#else /* PASS_R_RETURN */
static int getpwent_r_unknown_system = 0;
#endif /* PASS_R_RETURN */
#endif /* !def(_REENTRANT) || !def(DO_PTHREADS) || !def(WANT_IRS_PW) */
/*! \file */