-/* Copyright (C) 2003 Manuel Novoa III
+/* vi: set sw=4 ts=4: */
+/* Copyright (C) 2003 Manuel Novoa III
*
- * This 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.
- *
- * This 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 this library; if not, write to the Free
- * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
*/
-/* Nov 6, 2003 Initial version.
+/* Nov 6, 2003 Initial version.
*
- * NOTE: This implementation is quite strict about requiring all
+ * NOTE: This implementation is quite strict about requiring all
* field seperators. It also does not allow leading whitespace
* except when processing the numeric fields. glibc is more
* lenient. See the various glibc difference comments below.
*
- * TODO:
- * Move to dynamic allocation of (currently staticly allocated)
+ * TODO:
+ * Move to dynamic allocation of (currently statically allocated)
* buffers; especially for the group-related functions since
* large group member lists will cause error returns.
- *
*/
-#include <features.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <stdint.h>
-#include <string.h>
-#include <stddef.h>
-#include <errno.h>
+#include "libbb.h"
#include <assert.h>
-#include <ctype.h>
-#include "busybox.h"
-#include "pwd_.h"
-#include "grp_.h"
-#include "shadow_.h"
-
-#ifndef _PATH_SHADOW
-#define _PATH_SHADOW "/etc/shadow"
-#endif
-#ifndef _PATH_PASSWD
-#define _PATH_PASSWD "/etc/passwd"
-#endif
-#ifndef _PATH_GROUP
-#define _PATH_GROUP "/etc/group"
-#endif
/**********************************************************************/
-/* Sizes for staticly allocated buffers. */
+/* Sizes for statically allocated buffers. */
-/* If you change these values, also change _SC_GETPW_R_SIZE_MAX and
- * _SC_GETGR_R_SIZE_MAX in libc/unistd/sysconf.c to match */
#define PWD_BUFFER_SIZE 256
#define GRP_BUFFER_SIZE 256
/**********************************************************************/
/* Prototypes for internal functions. */
-extern int __parsepwent(void *pw, char *line);
-extern int __parsegrent(void *gr, char *line);
-extern int __parsespent(void *sp, char *line);
+static int bb__pgsreader(
+ int FAST_FUNC (*parserfunc)(void *d, char *line),
+ void *data,
+ char *__restrict line_buff,
+ size_t buflen,
+ FILE *f);
+
+static int FAST_FUNC bb__parsepwent(void *pw, char *line);
+static int FAST_FUNC bb__parsegrent(void *gr, char *line);
+#if ENABLE_USE_BB_SHADOW
+static int FAST_FUNC bb__parsespent(void *sp, char *line);
+#endif
+
+/**********************************************************************/
+/* We avoid having big global data. */
+
+struct statics {
+ /* Smaller things first */
+ /* It's ok to use one buffer for getpwuid and getpwnam. Manpage says:
+ * "The return value may point to a static area, and may be overwritten
+ * by subsequent calls to getpwent(), getpwnam(), or getpwuid()."
+ */
+ struct passwd getpw_resultbuf;
+ struct group getgr_resultbuf;
+
+ char getpw_buffer[PWD_BUFFER_SIZE];
+ char getgr_buffer[GRP_BUFFER_SIZE];
+#if 0 //ENABLE_USE_BB_SHADOW
+ struct spwd getsp_resultbuf;
+ char getsp_buffer[PWD_BUFFER_SIZE];
+#endif
+// Not converted - too small to bother
+//pthread_mutex_t mylock = PTHREAD_MUTEX_INITIALIZER;
+//FILE *pwf /*= NULL*/;
+//FILE *grf /*= NULL*/;
+//FILE *spf /*= NULL*/;
+};
+
+static struct statics *ptr_to_statics;
+
+static struct statics *get_S(void)
+{
+ if (!ptr_to_statics)
+ ptr_to_statics = xzalloc(sizeof(*ptr_to_statics));
+ return ptr_to_statics;
+}
-extern int __pgsreader(int (*__parserfunc)(void *d, char *line), void *data,
- char *__restrict line_buff, size_t buflen, FILE *f);
+/* Always use in this order, get_S() must be called first */
+#define RESULTBUF(name) &((S = get_S())->name##_resultbuf)
+#define BUFFER(name) (S->name##_buffer)
/**********************************************************************/
/* For the various fget??ent_r funcs, return
* 0: success
* ENOENT: end-of-file encountered
* ERANGE: buflen too small
- * other error values possible. See __pgsreader.
+ * other error values possible. See bb__pgsreader.
*
* Also, *result == resultbuf on success and NULL on failure.
*
* Doing so is analogous to having fgetc() set errno on EOF.
*/
/**********************************************************************/
-#ifdef L_fgetpwent_r
int fgetpwent_r(FILE *__restrict stream, struct passwd *__restrict resultbuf,
char *__restrict buffer, size_t buflen,
*result = NULL;
- if (!(rv = __pgsreader(__parsepwent, resultbuf, buffer, buflen, stream))) {
+ rv = bb__pgsreader(bb__parsepwent, resultbuf, buffer, buflen, stream);
+ if (!rv) {
*result = resultbuf;
}
return rv;
}
-#endif
-/**********************************************************************/
-#ifdef L_fgetgrent_r
-
int fgetgrent_r(FILE *__restrict stream, struct group *__restrict resultbuf,
char *__restrict buffer, size_t buflen,
struct group **__restrict result)
*result = NULL;
- if (!(rv = __pgsreader(__parsegrent, resultbuf, buffer, buflen, stream))) {
+ rv = bb__pgsreader(bb__parsegrent, resultbuf, buffer, buflen, stream);
+ if (!rv) {
*result = resultbuf;
}
return rv;
}
-#endif
-/**********************************************************************/
-#ifdef L_fgetspent_r
-
+#if ENABLE_USE_BB_SHADOW
+#ifdef UNUSED_FOR_NOW
int fgetspent_r(FILE *__restrict stream, struct spwd *__restrict resultbuf,
char *__restrict buffer, size_t buflen,
struct spwd **__restrict result)
*result = NULL;
- if (!(rv = __pgsreader(__parsespent, resultbuf, buffer, buflen, stream))) {
+ rv = bb__pgsreader(bb__parsespent, resultbuf, buffer, buflen, stream);
+ if (!rv) {
*result = resultbuf;
}
return rv;
}
-
#endif
+#endif
+
/**********************************************************************/
/* For the various fget??ent funcs, return NULL on failure and a
- * pointer to the appropriate struct (staticly allocated) on success.
- */
+ * pointer to the appropriate struct (statically allocated) on success.
+ * TODO: audit & stop using these in bbox, they pull in static buffers */
/**********************************************************************/
-#ifdef L_fgetpwent
+#ifdef UNUSED_SINCE_WE_AVOID_STATIC_BUFS
struct passwd *fgetpwent(FILE *stream)
{
- static char buffer[PWD_BUFFER_SIZE];
- static struct passwd resultbuf;
+ struct statics *S;
+ struct passwd *resultbuf = RESULTBUF(getpw);
+ char *buffer = BUFFER(getpw);
struct passwd *result;
- fgetpwent_r(stream, &resultbuf, buffer, sizeof(buffer), &result);
+ fgetpwent_r(stream, resultbuf, buffer, sizeof(BUFFER(getpw)), &result);
return result;
}
-#endif
-/**********************************************************************/
-#ifdef L_fgetgrent
-
struct group *fgetgrent(FILE *stream)
{
- static char buffer[GRP_BUFFER_SIZE];
- static struct group resultbuf;
+ struct statics *S;
+ struct group *resultbuf = RESULTBUF(getgr);
+ char *buffer = BUFFER(getgr);
struct group *result;
- fgetgrent_r(stream, &resultbuf, buffer, sizeof(buffer), &result);
+ fgetgrent_r(stream, resultbuf, buffer, sizeof(BUFFER(getgr)), &result);
return result;
}
-
#endif
-/**********************************************************************/
-#ifdef L_fgetspent
-extern int fgetspent_r(FILE *__restrict stream, struct spwd *__restrict resultbuf,
- char *__restrict buffer, size_t buflen,
- struct spwd **__restrict result);
+#if ENABLE_USE_BB_SHADOW
+#ifdef UNUSED_SINCE_WE_AVOID_STATIC_BUFS
struct spwd *fgetspent(FILE *stream)
{
- static char buffer[PWD_BUFFER_SIZE];
- static struct spwd resultbuf;
+ struct statics *S;
+ struct spwd *resultbuf = RESULTBUF(getsp);
+ char *buffer = BUFFER(getsp);
struct spwd *result;
- fgetspent_r(stream, &resultbuf, buffer, sizeof(buffer), &result);
+ fgetspent_r(stream, resultbuf, buffer, sizeof(BUFFER(getsp)), &result);
return result;
}
-
#endif
-/**********************************************************************/
-#ifdef L_sgetspent_r
+#ifdef UNUSED_FOR_NOW
int sgetspent_r(const char *string, struct spwd *result_buf,
char *buffer, size_t buflen, struct spwd **result)
{
*result = NULL;
if (buflen < PWD_BUFFER_SIZE) {
- DO_ERANGE:
- errno=rv;
+ DO_ERANGE:
+ errno = rv;
goto DONE;
}
strcpy(buffer, string);
}
- if (!(rv = __parsespent(result_buf, buffer))) {
+ rv = bb__parsespent(result_buf, buffer);
+ if (!rv) {
*result = result_buf;
}
DONE:
return rv;
}
-
-#endif
-/**********************************************************************/
-
-#ifdef GETXXKEY_R_FUNC
-#error GETXXKEY_R_FUNC is already defined!
-#endif
-
-#ifdef L_getpwnam_r
-#define GETXXKEY_R_FUNC getpwnam_r
-#define GETXXKEY_R_PARSER __parsepwent
-#define GETXXKEY_R_ENTTYPE struct passwd
-#define GETXXKEY_R_TEST(ENT) (!strcmp((ENT)->pw_name, key))
-#define DO_GETXXKEY_R_KEYTYPE const char *__restrict
-#define DO_GETXXKEY_R_PATHNAME _PATH_PASSWD
-#endif
-
-#ifdef L_getgrnam_r
-#define GETXXKEY_R_FUNC getgrnam_r
-#define GETXXKEY_R_PARSER __parsegrent
-#define GETXXKEY_R_ENTTYPE struct group
-#define GETXXKEY_R_TEST(ENT) (!strcmp((ENT)->gr_name, key))
-#define DO_GETXXKEY_R_KEYTYPE const char *__restrict
-#define DO_GETXXKEY_R_PATHNAME _PATH_GROUP
-#endif
-
-#ifdef L_getspnam_r
-#define GETXXKEY_R_FUNC getspnam_r
-#define GETXXKEY_R_PARSER __parsespent
-#define GETXXKEY_R_ENTTYPE struct spwd
-#define GETXXKEY_R_TEST(ENT) (!strcmp((ENT)->sp_namp, key))
-#define DO_GETXXKEY_R_KEYTYPE const char *__restrict
-#define DO_GETXXKEY_R_PATHNAME _PATH_SHADOW
-#endif
-
-#ifdef L_getpwuid_r
-#define GETXXKEY_R_FUNC getpwuid_r
-#define GETXXKEY_R_PARSER __parsepwent
-#define GETXXKEY_R_ENTTYPE struct passwd
-#define GETXXKEY_R_TEST(ENT) ((ENT)->pw_uid == key)
-#define DO_GETXXKEY_R_KEYTYPE uid_t
-#define DO_GETXXKEY_R_PATHNAME _PATH_PASSWD
-#endif
-
-#ifdef L_getgrgid_r
-#define GETXXKEY_R_FUNC getgrgid_r
-#define GETXXKEY_R_PARSER __parsegrent
-#define GETXXKEY_R_ENTTYPE struct group
-#define GETXXKEY_R_TEST(ENT) ((ENT)->gr_gid == key)
-#define DO_GETXXKEY_R_KEYTYPE gid_t
-#define DO_GETXXKEY_R_PATHNAME _PATH_GROUP
#endif
+#endif /* ENABLE_USE_BB_SHADOW */
/**********************************************************************/
-#ifdef GETXXKEY_R_FUNC
-int GETXXKEY_R_FUNC(DO_GETXXKEY_R_KEYTYPE key,
- GETXXKEY_R_ENTTYPE *__restrict resultbuf,
- char *__restrict buffer, size_t buflen,
- GETXXKEY_R_ENTTYPE **__restrict result)
-{
- FILE *stream;
- int rv;
-
- *result = NULL;
-
- if (!(stream = fopen(DO_GETXXKEY_R_PATHNAME, "r"))) {
- rv = errno;
- } else {
- do {
- if (!(rv = __pgsreader(GETXXKEY_R_PARSER, resultbuf,
- buffer, buflen, stream))
- ) {
- if (GETXXKEY_R_TEST(resultbuf)) { /* Found key? */
- *result = resultbuf;
- break;
- }
- } else {
- if (rv == ENOENT) { /* end-of-file encountered. */
- rv = 0;
- }
- break;
- }
- } while (1);
- fclose(stream);
- }
+#define GETXXKEY_R_FUNC getpwnam_r
+#define GETXXKEY_R_PARSER bb__parsepwent
+#define GETXXKEY_R_ENTTYPE struct passwd
+#define GETXXKEY_R_TEST(ENT) (!strcmp((ENT)->pw_name, key))
+#define GETXXKEY_R_KEYTYPE const char *__restrict
+#define GETXXKEY_R_PATHNAME _PATH_PASSWD
+#include "pwd_grp_internal.c"
+
+#define GETXXKEY_R_FUNC getgrnam_r
+#define GETXXKEY_R_PARSER bb__parsegrent
+#define GETXXKEY_R_ENTTYPE struct group
+#define GETXXKEY_R_TEST(ENT) (!strcmp((ENT)->gr_name, key))
+#define GETXXKEY_R_KEYTYPE const char *__restrict
+#define GETXXKEY_R_PATHNAME _PATH_GROUP
+#include "pwd_grp_internal.c"
+
+#if ENABLE_USE_BB_SHADOW
+#define GETXXKEY_R_FUNC getspnam_r
+#define GETXXKEY_R_PARSER bb__parsespent
+#define GETXXKEY_R_ENTTYPE struct spwd
+#define GETXXKEY_R_TEST(ENT) (!strcmp((ENT)->sp_namp, key))
+#define GETXXKEY_R_KEYTYPE const char *__restrict
+#define GETXXKEY_R_PATHNAME _PATH_SHADOW
+#include "pwd_grp_internal.c"
+#endif
- return rv;
-}
+#define GETXXKEY_R_FUNC getpwuid_r
+#define GETXXKEY_R_PARSER bb__parsepwent
+#define GETXXKEY_R_ENTTYPE struct passwd
+#define GETXXKEY_R_TEST(ENT) ((ENT)->pw_uid == key)
+#define GETXXKEY_R_KEYTYPE uid_t
+#define GETXXKEY_R_PATHNAME _PATH_PASSWD
+#include "pwd_grp_internal.c"
+
+#define GETXXKEY_R_FUNC getgrgid_r
+#define GETXXKEY_R_PARSER bb__parsegrent
+#define GETXXKEY_R_ENTTYPE struct group
+#define GETXXKEY_R_TEST(ENT) ((ENT)->gr_gid == key)
+#define GETXXKEY_R_KEYTYPE gid_t
+#define GETXXKEY_R_PATHNAME _PATH_GROUP
+#include "pwd_grp_internal.c"
-#endif
/**********************************************************************/
-#ifdef L_getpwuid
+/* TODO: audit & stop using these in bbox, they pull in static buffers */
+/* This one has many users */
struct passwd *getpwuid(uid_t uid)
{
- static char buffer[PWD_BUFFER_SIZE];
- static struct passwd resultbuf;
+ struct statics *S;
+ struct passwd *resultbuf = RESULTBUF(getpw);
+ char *buffer = BUFFER(getpw);
struct passwd *result;
- getpwuid_r(uid, &resultbuf, buffer, sizeof(buffer), &result);
+ getpwuid_r(uid, resultbuf, buffer, sizeof(BUFFER(getpw)), &result);
return result;
}
-#endif
-/**********************************************************************/
-#ifdef L_getgrgid
-
+/* This one has many users */
struct group *getgrgid(gid_t gid)
{
- static char buffer[GRP_BUFFER_SIZE];
- static struct group resultbuf;
+ struct statics *S;
+ struct group *resultbuf = RESULTBUF(getgr);
+ char *buffer = BUFFER(getgr);
struct group *result;
- getgrgid_r(gid, &resultbuf, buffer, sizeof(buffer), &result);
+ getgrgid_r(gid, resultbuf, buffer, sizeof(BUFFER(getgr)), &result);
return result;
}
-#endif
-/**********************************************************************/
-#ifdef L_getspuid_r
-
+#if 0 //ENABLE_USE_BB_SHADOW
/* This function is non-standard and is currently not built. It seems
* to have been created as a reentrant version of the non-standard
* functions getspuid. Why getspuid was added, I do not know. */
-
int getspuid_r(uid_t uid, struct spwd *__restrict resultbuf,
- char *__restrict buffer, size_t buflen,
- struct spwd **__restrict result)
+ char *__restrict buffer, size_t buflen,
+ struct spwd **__restrict result)
{
int rv;
struct passwd *pp;
char pwd_buff[PWD_BUFFER_SIZE];
*result = NULL;
- if (!(rv = getpwuid_r(uid, &password, pwd_buff, sizeof(pwd_buff), &pp))) {
+ rv = getpwuid_r(uid, &password, pwd_buff, sizeof(pwd_buff), &pp);
+ if (!rv) {
rv = getspnam_r(password.pw_name, resultbuf, buffer, buflen, result);
}
return rv;
}
-#endif
-/**********************************************************************/
-#ifdef L_getspuid
-
/* This function is non-standard and is currently not built.
* Why it was added, I do not know. */
-
struct spwd *getspuid(uid_t uid)
{
- static char buffer[PWD_BUFFER_SIZE];
- static struct spwd resultbuf;
+ struct statics *S;
+ struct spwd *resultbuf = RESULTBUF(getsp);
+ char *buffer = BUFFER(getsp);
struct spwd *result;
- getspuid_r(uid, &resultbuf, buffer, sizeof(buffer), &result);
+ getspuid_r(uid, resultbuf, buffer, sizeof(BUFFER(getsp)), &result);
return result;
}
-
#endif
-/**********************************************************************/
-#ifdef L_getpwnam
+/* This one has many users */
struct passwd *getpwnam(const char *name)
{
- static char buffer[PWD_BUFFER_SIZE];
- static struct passwd resultbuf;
+ struct statics *S;
+ struct passwd *resultbuf = RESULTBUF(getpw);
+ char *buffer = BUFFER(getpw);
struct passwd *result;
- getpwnam_r(name, &resultbuf, buffer, sizeof(buffer), &result);
+ getpwnam_r(name, resultbuf, buffer, sizeof(BUFFER(getpw)), &result);
return result;
}
-#endif
-/**********************************************************************/
-#ifdef L_getgrnam
-
+/* This one has many users */
struct group *getgrnam(const char *name)
{
- static char buffer[GRP_BUFFER_SIZE];
- static struct group resultbuf;
+ struct statics *S;
+ struct group *resultbuf = RESULTBUF(getgr);
+ char *buffer = BUFFER(getgr);
struct group *result;
- getgrnam_r(name, &resultbuf, buffer, sizeof(buffer), &result);
+ getgrnam_r(name, resultbuf, buffer, sizeof(BUFFER(getgr)), &result);
return result;
}
-#endif
-/**********************************************************************/
-#ifdef L_getspnam
-
+#if 0 //ENABLE_USE_BB_SHADOW
struct spwd *getspnam(const char *name)
{
- static char buffer[PWD_BUFFER_SIZE];
- static struct spwd resultbuf;
+ struct statics *S;
+ struct spwd *resultbuf = RESULTBUF(getsp);
+ char *buffer = BUFFER(getsp);
struct spwd *result;
- getspnam_r(name, &resultbuf, buffer, sizeof(buffer), &result);
+ getspnam_r(name, resultbuf, buffer, sizeof(BUFFER(getsp)), &result);
return result;
}
-
#endif
-/**********************************************************************/
-#ifdef L_getpw
-int getpw(uid_t uid, char *buf)
-{
- struct passwd resultbuf;
- struct passwd *result;
- char buffer[PWD_BUFFER_SIZE];
-
- if (!buf) {
- errno=EINVAL;
- } else if (!getpwuid_r(uid, &resultbuf, buffer, sizeof(buffer), &result)) {
- if (sprintf(buf, "%s:%s:%lu:%lu:%s:%s:%s\n",
- resultbuf.pw_name, resultbuf.pw_passwd,
- (unsigned long)(resultbuf.pw_uid),
- (unsigned long)(resultbuf.pw_gid),
- resultbuf.pw_gecos, resultbuf.pw_dir,
- resultbuf.pw_shell) >= 0
- ) {
- return 0;
- }
- }
+/**********************************************************************/
- return -1;
-}
+/* FIXME: we don't have such CONFIG_xx - ?! */
+#if defined CONFIG_USE_BB_THREADSAFE_SHADOW && defined PTHREAD_MUTEX_INITIALIZER
+static pthread_mutex_t mylock = PTHREAD_MUTEX_INITIALIZER;
+# define LOCK pthread_mutex_lock(&mylock)
+# define UNLOCK pthread_mutex_unlock(&mylock);
+#else
+# define LOCK ((void) 0)
+# define UNLOCK ((void) 0)
#endif
-/**********************************************************************/
-#ifdef L_getpwent_r
static FILE *pwf /*= NULL*/;
void setpwent(void)
{
+ LOCK;
if (pwf) {
rewind(pwf);
}
+ UNLOCK;
}
void endpwent(void)
{
+ LOCK;
if (pwf) {
fclose(pwf);
pwf = NULL;
}
+ UNLOCK;
}
-int getpwent_r(struct passwd *__restrict resultbuf,
- char *__restrict buffer, size_t buflen,
- struct passwd **__restrict result)
+int getpwent_r(struct passwd *__restrict resultbuf,
+ char *__restrict buffer, size_t buflen,
+ struct passwd **__restrict result)
{
int rv;
+ LOCK;
*result = NULL; /* In case of error... */
if (!pwf) {
- if (!(pwf = fopen(_PATH_PASSWD, "r"))) {
+ pwf = fopen_for_read(_PATH_PASSWD);
+ if (!pwf) {
rv = errno;
goto ERR;
}
+ close_on_exec_on(fileno(pwf));
}
- if (!(rv = __pgsreader(__parsepwent, resultbuf,
- buffer, buflen, pwf))) {
+ rv = bb__pgsreader(bb__parsepwent, resultbuf, buffer, buflen, pwf);
+ if (!rv) {
*result = resultbuf;
}
ERR:
+ UNLOCK;
return rv;
}
-#endif
-/**********************************************************************/
-#ifdef L_getgrent_r
-
static FILE *grf /*= NULL*/;
void setgrent(void)
{
+ LOCK;
if (grf) {
rewind(grf);
}
+ UNLOCK;
}
void endgrent(void)
{
+ LOCK;
if (grf) {
fclose(grf);
grf = NULL;
}
+ UNLOCK;
}
int getgrent_r(struct group *__restrict resultbuf,
- char *__restrict buffer, size_t buflen,
- struct group **__restrict result)
+ char *__restrict buffer, size_t buflen,
+ struct group **__restrict result)
{
int rv;
+ LOCK;
*result = NULL; /* In case of error... */
if (!grf) {
- if (!(grf = fopen(_PATH_GROUP, "r"))) {
+ grf = fopen_for_read(_PATH_GROUP);
+ if (!grf) {
rv = errno;
goto ERR;
}
+ close_on_exec_on(fileno(grf));
}
- if (!(rv = __pgsreader(__parsegrent, resultbuf,
- buffer, buflen, grf))) {
+ rv = bb__pgsreader(bb__parsegrent, resultbuf, buffer, buflen, grf);
+ if (!rv) {
*result = resultbuf;
}
ERR:
+ UNLOCK;
return rv;
}
-#endif
-/**********************************************************************/
-#ifdef L_getspent_r
-
+#ifdef UNUSED_FOR_NOW
+#if ENABLE_USE_BB_SHADOW
static FILE *spf /*= NULL*/;
void setspent(void)
{
+ LOCK;
if (spf) {
rewind(spf);
}
+ UNLOCK;
}
void endspent(void)
{
+ LOCK;
if (spf) {
fclose(spf);
spf = NULL;
}
+ UNLOCK;
}
-int getspent_r(struct spwd *resultbuf, char *buffer,
- size_t buflen, struct spwd **result)
+int getspent_r(struct spwd *resultbuf, char *buffer,
+ size_t buflen, struct spwd **result)
{
int rv;
+ LOCK;
*result = NULL; /* In case of error... */
if (!spf) {
- if (!(spf = fopen(_PATH_SHADOW, "r"))) {
+ spf = fopen_for_read(_PATH_SHADOW);
+ if (!spf) {
rv = errno;
goto ERR;
}
+ close_on_exec_on(fileno(spf));
}
- if (!(rv = __pgsreader(__parsespent, resultbuf,
- buffer, buflen, spf))) {
+ rv = bb__pgsreader(bb__parsespent, resultbuf, buffer, buflen, spf);
+ if (!rv) {
*result = resultbuf;
}
ERR:
+ UNLOCK;
return rv;
}
-
#endif
-/**********************************************************************/
-#ifdef L_getpwent
+#endif /* UNUSED_FOR_NOW */
+#ifdef UNUSED_SINCE_WE_AVOID_STATIC_BUFS
struct passwd *getpwent(void)
{
static char line_buff[PWD_BUFFER_SIZE];
return result;
}
-#endif
-/**********************************************************************/
-#ifdef L_getgrent
-
struct group *getgrent(void)
{
static char line_buff[GRP_BUFFER_SIZE];
return result;
}
-#endif
-/**********************************************************************/
-#ifdef L_getspent
-
+#if ENABLE_USE_BB_SHADOW
struct spwd *getspent(void)
{
static char line_buff[PWD_BUFFER_SIZE];
return result;
}
-#endif
-/**********************************************************************/
-#ifdef L_sgetspent
-
struct spwd *sgetspent(const char *string)
{
static char line_buff[PWD_BUFFER_SIZE];
sgetspent_r(string, &spwd, line_buff, sizeof(line_buff), &result);
return result;
}
-
#endif
-/**********************************************************************/
-#ifdef L_initgroups
+#endif /* UNUSED_SINCE_WE_AVOID_STATIC_BUFS */
-int initgroups(const char *user, gid_t gid)
+static gid_t *getgrouplist_internal(int *ngroups_ptr, const char *user, gid_t gid)
{
- FILE *grf;
+ FILE *grfile;
gid_t *group_list;
- int num_groups, rv;
- char **m;
+ int ngroups;
struct group group;
char buff[PWD_BUFFER_SIZE];
- rv = -1;
-
/* We alloc space for 8 gids at a time. */
- if (((group_list = (gid_t *) malloc(8*sizeof(gid_t *))) != NULL)
- && ((grf = fopen(_PATH_GROUP, "r")) != NULL)
- ) {
-
- *group_list = gid;
- num_groups = 1;
-
- while (!__pgsreader(__parsegrent, &group, buff, sizeof(buff), grf)) {
+ group_list = xmalloc(8 * sizeof(group_list[0]));
+ group_list[0] = gid;
+ ngroups = 1;
+
+ grfile = fopen_for_read(_PATH_GROUP);
+ if (grfile) {
+ while (!bb__pgsreader(bb__parsegrent, &group, buff, sizeof(buff), grfile)) {
+ char **m;
assert(group.gr_mem); /* Must have at least a NULL terminator. */
- if (group.gr_gid != gid) {
- for (m=group.gr_mem ; *m ; m++) {
- if (!strcmp(*m, user)) {
- if (!(num_groups & 7)) {
- gid_t *tmp = (gid_t *)
- realloc(group_list,
- (num_groups+8) * sizeof(gid_t *));
- if (!tmp) {
- rv = -1;
- goto DO_CLOSE;
- }
- group_list = tmp;
- }
- group_list[num_groups++] = group.gr_gid;
- break;
- }
- }
+ if (group.gr_gid == gid)
+ continue;
+ for (m = group.gr_mem; *m; m++) {
+ if (strcmp(*m, user) != 0)
+ continue;
+ group_list = xrealloc_vector(group_list, /*8=2^3:*/ 3, ngroups);
+ group_list[ngroups++] = group.gr_gid;
+ break;
}
}
-
- rv = setgroups(num_groups, group_list);
- DO_CLOSE:
- fclose(grf);
+ fclose(grfile);
}
+ *ngroups_ptr = ngroups;
+ return group_list;
+}
- /* group_list will be NULL if initial malloc failed, which may trigger
- * warnings from various malloc debuggers. */
+int initgroups(const char *user, gid_t gid)
+{
+ int ngroups;
+ gid_t *group_list = getgrouplist_internal(&ngroups, user, gid);
+
+ ngroups = setgroups(ngroups, group_list);
free(group_list);
- return rv;
+ return ngroups;
}
-#endif
-/**********************************************************************/
-#ifdef L_putpwent
+int getgrouplist(const char *user, gid_t gid, gid_t *groups, int *ngroups)
+{
+ int ngroups_old = *ngroups;
+ gid_t *group_list = getgrouplist_internal(ngroups, user, gid);
+
+ if (*ngroups <= ngroups_old) {
+ ngroups_old = *ngroups;
+ memcpy(groups, group_list, ngroups_old * sizeof(groups[0]));
+ } else {
+ ngroups_old = -1;
+ }
+ free(group_list);
+ return ngroups_old;
+}
+#ifdef UNUSED_SINCE_WE_AVOID_STATIC_BUFS
int putpwent(const struct passwd *__restrict p, FILE *__restrict f)
{
int rv = -1;
+#if 0
+ /* glibc does this check */
if (!p || !f) {
- errno=EINVAL;
- } else {
- /* No extra thread locking is needed above what fprintf does. */
- if (fprintf(f, "%s:%s:%lu:%lu:%s:%s:%s\n",
- p->pw_name, p->pw_passwd,
- (unsigned long)(p->pw_uid),
- (unsigned long)(p->pw_gid),
- p->pw_gecos, p->pw_dir, p->pw_shell) >= 0
- ) {
- rv = 0;
- }
+ errno = EINVAL;
+ return rv;
+ }
+#endif
+
+ /* No extra thread locking is needed above what fprintf does. */
+ if (fprintf(f, "%s:%s:%lu:%lu:%s:%s:%s\n",
+ p->pw_name, p->pw_passwd,
+ (unsigned long)(p->pw_uid),
+ (unsigned long)(p->pw_gid),
+ p->pw_gecos, p->pw_dir, p->pw_shell) >= 0
+ ) {
+ rv = 0;
}
return rv;
}
-#endif
-/**********************************************************************/
-#ifdef L_putgrent
-
int putgrent(const struct group *__restrict p, FILE *__restrict f)
{
- static const char format[] = ",%s";
- char **m;
- const char *fmt;
int rv = -1;
- if (!p || !f) { /* Sigh... glibc checks. */
- errno=EINVAL;
- } else {
- if (fprintf(f, "%s:%s:%lu:",
- p->gr_name, p->gr_passwd,
- (unsigned long)(p->gr_gid)) >= 0
- ) {
+#if 0
+ /* glibc does this check */
+ if (!p || !f) {
+ errno = EINVAL;
+ return rv;
+ }
+#endif
- fmt = format + 1;
+ if (fprintf(f, "%s:%s:%lu:",
+ p->gr_name, p->gr_passwd,
+ (unsigned long)(p->gr_gid)) >= 0
+ ) {
+ static const char format[] ALIGN1 = ",%s";
- assert(p->gr_mem);
- m = p->gr_mem;
+ char **m;
+ const char *fmt;
- do {
- if (!*m) {
- if (fputc_unlocked('\n', f) >= 0) {
- rv = 0;
- }
- break;
- }
- if (fprintf(f, fmt, *m) < 0) {
- break;
- }
- ++m;
- fmt = format;
- } while (1);
+ fmt = format + 1;
- }
+ assert(p->gr_mem);
+ m = p->gr_mem;
+ while (1) {
+ if (!*m) {
+ if (fputc('\n', f) >= 0) {
+ rv = 0;
+ }
+ break;
+ }
+ if (fprintf(f, fmt, *m) < 0) {
+ break;
+ }
+ m++;
+ fmt = format;
+ }
}
return rv;
}
-
#endif
-/**********************************************************************/
-#ifdef L_putspent
-
-static const unsigned char sp_off[] = {
- offsetof(struct spwd, sp_lstchg), /* 2 - not a char ptr */
- offsetof(struct spwd, sp_min), /* 3 - not a char ptr */
- offsetof(struct spwd, sp_max), /* 4 - not a char ptr */
- offsetof(struct spwd, sp_warn), /* 5 - not a char ptr */
- offsetof(struct spwd, sp_inact), /* 6 - not a char ptr */
- offsetof(struct spwd, sp_expire), /* 7 - not a char ptr */
+
+#if ENABLE_USE_BB_SHADOW
+#ifdef UNUSED_FOR_NOW
+static const unsigned char put_sp_off[] ALIGN1 = {
+ offsetof(struct spwd, sp_lstchg), /* 2 - not a char ptr */
+ offsetof(struct spwd, sp_min), /* 3 - not a char ptr */
+ offsetof(struct spwd, sp_max), /* 4 - not a char ptr */
+ offsetof(struct spwd, sp_warn), /* 5 - not a char ptr */
+ offsetof(struct spwd, sp_inact), /* 6 - not a char ptr */
+ offsetof(struct spwd, sp_expire) /* 7 - not a char ptr */
};
int putspent(const struct spwd *p, FILE *stream)
{
- static const char ld_format[] = "%ld:";
- const char *f;
- long int x;
+ const char *fmt;
+ long x;
int i;
int rv = -1;
/* Unlike putpwent and putgrent, glibc does not check the args. */
if (fprintf(stream, "%s:%s:", p->sp_namp,
(p->sp_pwdp ? p->sp_pwdp : "")) < 0
- ) {
+ ) {
goto DO_UNLOCK;
}
- for (i=0 ; i < sizeof(sp_off) ; i++) {
- f = ld_format;
- if ((x = *(const long int *)(((const char *) p) + sp_off[i])) == -1) {
- f += 3;
+ for (i = 0; i < sizeof(put_sp_off); i++) {
+ fmt = "%ld:";
+ x = *(long *)((char *)p + put_sp_off[i]);
+ if (x == -1) {
+ fmt += 3;
}
- if (fprintf(stream, f, x) < 0) {
+ if (fprintf(stream, fmt, x) < 0) {
goto DO_UNLOCK;
}
}
goto DO_UNLOCK;
}
- if (fputc_unlocked('\n', stream) > 0) {
+ if (fputc('\n', stream) > 0) {
rv = 0;
}
-DO_UNLOCK:
+ DO_UNLOCK:
return rv;
}
-
#endif
+#endif /* USE_BB_SHADOW */
+
/**********************************************************************/
-/* Internal uClibc functions. */
+/* Internal functions */
/**********************************************************************/
-#ifdef L___parsepwent
-
-static const unsigned char pw_off[] = {
- offsetof(struct passwd, pw_name), /* 0 */
- offsetof(struct passwd, pw_passwd), /* 1 */
- offsetof(struct passwd, pw_uid), /* 2 - not a char ptr */
- offsetof(struct passwd, pw_gid), /* 3 - not a char ptr */
- offsetof(struct passwd, pw_gecos), /* 4 */
- offsetof(struct passwd, pw_dir), /* 5 */
- offsetof(struct passwd, pw_shell) /* 6 */
+
+static const unsigned char pw_off[] ALIGN1 = {
+ offsetof(struct passwd, pw_name), /* 0 */
+ offsetof(struct passwd, pw_passwd), /* 1 */
+ offsetof(struct passwd, pw_uid), /* 2 - not a char ptr */
+ offsetof(struct passwd, pw_gid), /* 3 - not a char ptr */
+ offsetof(struct passwd, pw_gecos), /* 4 */
+ offsetof(struct passwd, pw_dir), /* 5 */
+ offsetof(struct passwd, pw_shell) /* 6 */
};
-int __parsepwent(void *data, char *line)
+static int FAST_FUNC bb__parsepwent(void *data, char *line)
{
char *endptr;
char *p;
int i;
i = 0;
- do {
- p = ((char *) ((struct passwd *) data)) + pw_off[i];
+ while (1) {
+ p = (char *) data + pw_off[i];
- if ((i & 6) ^ 2) { /* i!=2 and i!=3 */
+ if (i < 2 || i > 3) {
*((char **) p) = line;
- if (i==6) {
+ if (i == 6) {
return 0;
}
/* NOTE: glibc difference - glibc allows omission of
* ':' seperators after the gid field if all remaining
* entries are empty. We require all separators. */
- if (!(line = strchr(line, ':'))) {
+ line = strchr(line, ':');
+ if (!line) {
break;
}
} else {
}
}
- *line++ = 0;
- ++i;
- } while (1);
+ *line++ = '\0';
+ i++;
+ } /* while (1) */
return -1;
}
-#endif
/**********************************************************************/
-#ifdef L___parsegrent
-static const unsigned char gr_off[] = {
- offsetof(struct group, gr_name), /* 0 */
- offsetof(struct group, gr_passwd), /* 1 */
- offsetof(struct group, gr_gid) /* 2 - not a char ptr */
+static const unsigned char gr_off[] ALIGN1 = {
+ offsetof(struct group, gr_name), /* 0 */
+ offsetof(struct group, gr_passwd), /* 1 */
+ offsetof(struct group, gr_gid) /* 2 - not a char ptr */
};
-int __parsegrent(void *data, char *line)
+static int FAST_FUNC bb__parsegrent(void *data, char *line)
{
char *endptr;
char *p;
end_of_buf = ((struct group *) data)->gr_name; /* Evil hack! */
i = 0;
- do {
- p = ((char *) ((struct group *) data)) + gr_off[i];
+ while (1) {
+ p = (char *) data + gr_off[i];
if (i < 2) {
*((char **) p) = line;
- if (!(line = strchr(line, ':'))) {
+ line = strchr(line, ':');
+ if (!line) {
break;
}
- *line++ = 0;
- ++i;
+ *line++ = '\0';
+ i++;
} else {
*((gid_t *) p) = strtoul(line, &endptr, 10);
if (p[1]) { /* We have a member list to process. */
/* Overwrite the last ':' with a ',' before counting.
- * This allows us to test for initial ',' and adds
- * one ',' so that the ',' count equals the member
- * count. */
+ * This allows us to (1) test for initial ','
+ * and (2) adds one ',' so that the number of commas
+ * equals the member count. */
*p = ',';
do {
/* NOTE: glibc difference - glibc allows and trims leading
if (--i) {
p = endptr; /* Pointing to char prior to first member. */
- do {
+ while (1) {
*members++ = ++p;
- if (!--i) break;
- while (*++p) {}
- } while (1);
- }
+ if (!--i)
+ break;
+ while (*++p)
+ continue;
+ }
+ }
*members = NULL;
return 0;
}
- } while (1);
+ } /* while (1) */
ERR:
return -1;
}
-#endif
/**********************************************************************/
-#ifdef L___parsespent
-
-static const unsigned char sp_off[] = {
- offsetof(struct spwd, sp_namp), /* 0 */
- offsetof(struct spwd, sp_pwdp), /* 1 */
- offsetof(struct spwd, sp_lstchg), /* 2 - not a char ptr */
- offsetof(struct spwd, sp_min), /* 3 - not a char ptr */
- offsetof(struct spwd, sp_max), /* 4 - not a char ptr */
- offsetof(struct spwd, sp_warn), /* 5 - not a char ptr */
- offsetof(struct spwd, sp_inact), /* 6 - not a char ptr */
- offsetof(struct spwd, sp_expire), /* 7 - not a char ptr */
- offsetof(struct spwd, sp_flag) /* 8 - not a char ptr */
+
+#if ENABLE_USE_BB_SHADOW
+static const unsigned char sp_off[] ALIGN1 = {
+ offsetof(struct spwd, sp_namp), /* 0: char* */
+ offsetof(struct spwd, sp_pwdp), /* 1: char* */
+ offsetof(struct spwd, sp_lstchg), /* 2: long */
+ offsetof(struct spwd, sp_min), /* 3: long */
+ offsetof(struct spwd, sp_max), /* 4: long */
+ offsetof(struct spwd, sp_warn), /* 5: long */
+ offsetof(struct spwd, sp_inact), /* 6: long */
+ offsetof(struct spwd, sp_expire), /* 7: long */
+ offsetof(struct spwd, sp_flag) /* 8: unsigned long */
};
-int __parsespent(void *data, char * line)
+static int FAST_FUNC bb__parsespent(void *data, char *line)
{
char *endptr;
char *p;
int i;
i = 0;
- do {
- p = ((char *) ((struct spwd *) data)) + sp_off[i];
+ while (1) {
+ p = (char *) data + sp_off[i];
if (i < 2) {
*((char **) p) = line;
- if (!(line = strchr(line, ':'))) {
- break;
+ line = strchr(line, ':');
+ if (!line) {
+ break; /* error */
}
} else {
-#if 0
- if (i==5) { /* Support for old format. */
- while (isspace(*line)) ++line; /* glibc eats space here. */
- if (!*line) {
- ((struct spwd *) data)->sp_warn = -1;
- ((struct spwd *) data)->sp_inact = -1;
- ((struct spwd *) data)->sp_expire = -1;
- ((struct spwd *) data)->sp_flag = ~0UL;
- return 0;
- }
- }
-#endif
-
- *((long *) p) = (long) strtoul(line, &endptr, 10);
-
+ *((long *) p) = strtoul(line, &endptr, 10);
if (endptr == line) {
- *((long *) p) = ((i != 8) ? -1L : ((long)(~0UL)));
+ *((long *) p) = -1L;
}
-
line = endptr;
-
if (i == 8) {
- if (!*endptr) {
- return 0;
+ if (*line != '\0') {
+ break; /* error */
}
- break;
+ return 0; /* all ok */
}
-
- if (*endptr != ':') {
- break;
+ if (*line != ':') {
+ break; /* error */
}
-
}
-
- *line++ = 0;
- ++i;
- } while (1);
+ *line++ = '\0';
+ i++;
+ }
return EINVAL;
}
-
#endif
+
/**********************************************************************/
-#ifdef L___pgsreader
-/* Reads until if EOF, or until if finds a line which fits in the buffer
+/* Reads until EOF, or until it finds a line which fits in the buffer
* and for which the parser function succeeds.
*
- * Returns 0 on success and ENOENT for end-of-file (glibc concession).
+ * Returns 0 on success and ENOENT for end-of-file (glibc convention).
*/
-
-int __pgsreader(int (*__parserfunc)(void *d, char *line), void *data,
- char *__restrict line_buff, size_t buflen, FILE *f)
+static int bb__pgsreader(
+ int FAST_FUNC (*parserfunc)(void *d, char *line),
+ void *data,
+ char *__restrict line_buff,
+ size_t buflen,
+ FILE *f)
{
- int line_len;
int skip;
int rv = ERANGE;
if (buflen < PWD_BUFFER_SIZE) {
- errno=rv;
- } else {
- skip = 0;
- do {
- if (!fgets_unlocked(line_buff, buflen, f)) {
- if (feof_unlocked(f)) {
- rv = ENOENT;
- }
- break;
- }
+ errno = rv;
+ return rv;
+ }
- line_len = strlen(line_buff) - 1; /* strlen() must be > 0. */
- if (line_buff[line_len] == '\n') {
- line_buff[line_len] = 0;
- } else if (line_len + 2 == buflen) { /* line too long */
- ++skip;
- continue;
+ skip = 0;
+ while (1) {
+ if (!fgets(line_buff, buflen, f)) {
+ if (feof(f)) {
+ rv = ENOENT;
}
+ break;
+ }
- if (skip) {
- --skip;
+ {
+ int line_len = strlen(line_buff) - 1;
+ if (line_len >= 0 && line_buff[line_len] == '\n') {
+ line_buff[line_len] = '\0';
+ } else
+ if (line_len + 2 == buflen) {
+ /* A start (or continuation) of overlong line */
+ skip = 1;
continue;
- }
+ } /* else: a last line in the file, and it has no '\n' */
+ }
- /* NOTE: glibc difference - glibc strips leading whitespace from
- * records. We do not allow leading whitespace. */
-
- /* Skip empty lines, comment lines, and lines with leading
- * whitespace. */
- if (*line_buff && (*line_buff != '#') && !isspace(*line_buff)) {
- if (__parserfunc == __parsegrent) { /* Do evil group hack. */
- /* The group entry parsing function needs to know where
- * the end of the buffer is so that it can construct the
- * group member ptr table. */
- ((struct group *) data)->gr_name = line_buff + buflen;
- }
+ if (skip) {
+ /* This "line" is a remainder of overlong line, ignore */
+ skip = 0;
+ continue;
+ }
- if (!__parserfunc(data, line_buff)) {
- rv = 0;
- break;
- }
+ /* NOTE: glibc difference - glibc strips leading whitespace from
+ * records. We do not allow leading whitespace. */
+
+ /* Skip empty lines, comment lines, and lines with leading
+ * whitespace. */
+ if (line_buff[0] != '\0' && line_buff[0] != '#' && !isspace(line_buff[0])) {
+ if (parserfunc == bb__parsegrent) {
+ /* Do evil group hack:
+ * The group entry parsing function needs to know where
+ * the end of the buffer is so that it can construct the
+ * group member ptr table. */
+ ((struct group *) data)->gr_name = line_buff + buflen;
}
- } while (1);
-
- }
+ if (parserfunc(data, line_buff) == 0) {
+ rv = 0;
+ break;
+ }
+ }
+ } /* while (1) */
return rv;
}
-
-#endif
-/**********************************************************************/
projects / platform / upstream / busybox.git / blobdiff