* Replaced the dummy implementations of the <grp.h> and <pwd.h>

functions by ones reading /etc/{group,passwd}.
* Added quasi-standard getpwent_r() and getgrent_r().
* Added _SC_GETGR_R_SIZE_MAX and _SC_GETPW_R_SIZE_MAX sysconf()
  constants.
* Moved initgroups() and getgrouplist() definition to grp.cpp. They use
  the same backend as the <grp.h> functions.
* Set the permissions of files created by the build system to what they
  should be on the image (executables: 755, others: 644). Otherwise only
  root could do anything under Haiku.
* Added build system variables HAIKU_ROOT_USER_NAME and
  HAIKU_ROOT_USER_REAL_NAME to customize name and real name of Haiku's
  root user.
* Added build system rules AddUserToHaikuImage and AddGroupToHaikuImage
  for adding additional users and groups (by default only root user and
  group and a "users" group are created).
* Adjusted BIND port and coreutils config.h files according to what
  features have become available.
* Fixed HAIKU_DOCUMENTATION_OBJECT_DIR definition. Untested, but it used
  a wrong variable name before.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@24750 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/posix/grp.h

@@ -29,6 +29,8 @@ extern int getgrnam_r(const char *name, struct group *group, char *buffer,
 				size_t bufferSize, struct group **_result);
 
 extern struct group *getgrent(void);
+extern int getgrent_r(struct group* group, char* buffer, size_t bufferSize,
+				struct group** _result);
 extern void setgrent(void);
 extern void endgrent(void);
 

headers/posix/pwd.h

@@ -22,10 +22,12 @@ struct passwd {
 
 /* traverse the user password database */
 extern struct passwd *getpwent(void);
+extern int getpwent_r(struct passwd* pwbuf, char* buf, size_t buflen,
+				struct passwd** pwbufp);
 extern void setpwent(void);
 extern void endpwent(void);
 
-/*search the user password database */
+/* search the user password database */
 extern struct passwd *getpwnam(const char *name);
 extern int getpwnam_r(const char *name, struct passwd *passwd, char *buffer,
 				size_t bufferSize, struct passwd **result);

headers/posix/unistd.h

@@ -57,6 +57,8 @@
 #define _SC_STREAM_MAX			22
 #define _SC_TZNAME_MAX			23
 #define _SC_VERSION				24
+#define _SC_GETGR_R_SIZE_MAX	25
+#define _SC_GETPW_R_SIZE_MAX	26
 
 /* lseek() constants */
 #ifndef SEEK_SET

headers/private/libroot/libroot_private.h

@@ -10,6 +10,30 @@
 #include <image.h>
 
 
+#define MAX_PASSWD_NAME_LEN			(32)
+#define MAX_PASSWD_PASSWORD_LEN		(32)
+#define MAX_PASSWD_REAL_NAME_LEN	(128)
+#define MAX_PASSWD_HOME_DIR_LEN		(B_PATH_NAME_LENGTH)
+#define MAX_PASSWD_SHELL_LEN		(B_PATH_NAME_LENGTH)
+
+#define MAX_PASSWD_BUFFER_SIZE	(	\
+	MAX_PASSWD_NAME_LEN				\
+	+ MAX_PASSWD_PASSWORD_LEN		\
+	+ MAX_PASSWD_REAL_NAME_LEN		\
+	+ MAX_PASSWD_HOME_DIR_LEN		\
+	+ MAX_PASSWD_SHELL_LEN)
+
+#define	MAX_GROUP_NAME_LEN			(32)
+#define	MAX_GROUP_PASSWORD_LEN		(32)
+#define	MAX_GROUP_MEMBER_COUNT		(32)
+
+#define MAX_GROUP_BUFFER_SIZE	(	\
+	MAX_GROUP_NAME_LEN				\
+	+ MAX_GROUP_PASSWORD_LEN		\
+	+ ((MAX_GROUP_MEMBER_COUNT + 1) * sizeof(char*)))
+	// MAX_GROUP_NAME_LEN and MAX_GROUP_PASSWORD_LEN are char* aligned
+
+
 struct user_space_program_args;
 struct real_time_data;
 
@@ -33,6 +57,8 @@ void __init_time(void);
 void __arch_init_time(struct real_time_data *data, bool setDefaults);
 bigtime_t __arch_get_system_time_offset(struct real_time_data *data);
 void __init_pwd_backend(void);
+void __reinit_pwd_backend_after_fork(void);
+
 
 #ifdef __cplusplus
 }