diff options
Diffstat (limited to 'winsup/cygwin/passwd.cc')
| -rw-r--r-- | winsup/cygwin/passwd.cc | 446 |
1 files changed, 0 insertions, 446 deletions
diff --git a/winsup/cygwin/passwd.cc b/winsup/cygwin/passwd.cc deleted file mode 100644 index ec7ed3a1e..000000000 --- a/winsup/cygwin/passwd.cc +++ /dev/null @@ -1,446 +0,0 @@ -/* passwd.cc: getpwnam () and friends - - Copyright 1996, 1997, 1998, 2001, 2002 Red Hat, Inc. - -This file is part of Cygwin. - -This software is a copyrighted work licensed under the terms of the -Cygwin license. Please consult the file "CYGWIN_LICENSE" for -details. */ - -#include "winsup.h" -#include <stdlib.h> -#include <pwd.h> -#include <stdio.h> -#include <errno.h> -#include "cygerrno.h" -#include "security.h" -#include "fhandler.h" -#include "path.h" -#include "dtable.h" -#include "pinfo.h" -#include "cygheap.h" -#include <sys/termios.h> -#include "pwdgrp.h" - -/* Read /etc/passwd only once for better performance. This is done - on the first call that needs information from it. */ - -static struct passwd *passwd_buf; /* passwd contents in memory */ -static int curr_lines; -static int max_lines; - -static pwdgrp_check passwd_state; - - -/* Position in the passwd cache */ -#ifdef _MT_SAFE -#define pw_pos _reent_winsup ()->_pw_pos -#else -static int pw_pos = 0; -#endif - -/* Remove a : teminated string from the buffer, and increment the pointer */ -static char * -grab_string (char **p) -{ - char *src = *p; - char *res = src; - - while (*src && *src != ':' && *src != '\n') - src++; - - if (*src == ':') - { - *src = 0; - src++; - } - *p = src; - return res; -} - -/* same, for ints */ -static int -grab_int (char **p) -{ - char *src = *p; - int val = strtol (src, NULL, 10); - while (*src && *src != ':' && *src != '\n') - src++; - if (*src == ':') - src++; - *p = src; - return val; -} - -/* Parse /etc/passwd line into passwd structure. */ -void -parse_pwd (struct passwd &res, char *buf) -{ - /* Allocate enough room for the passwd struct and all the strings - in it in one go */ - size_t len = strlen (buf); - if (buf[--len] == '\r') - buf[len] = '\0'; - - res.pw_name = grab_string (&buf); - res.pw_passwd = grab_string (&buf); - res.pw_uid = grab_int (&buf); - res.pw_gid = grab_int (&buf); - res.pw_comment = 0; - res.pw_gecos = grab_string (&buf); - res.pw_dir = grab_string (&buf); - res.pw_shell = grab_string (&buf); -} - -/* Add one line from /etc/passwd into the password cache */ -static void -add_pwd_line (char *line) -{ - if (curr_lines >= max_lines) - { - max_lines += 10; - passwd_buf = (struct passwd *) realloc (passwd_buf, max_lines * sizeof (struct passwd)); - } - parse_pwd (passwd_buf[curr_lines++], line); -} - -class passwd_lock -{ - bool armed; - static NO_COPY pthread_mutex_t mutex; - public: - passwd_lock (bool doit) - { - if (doit) - pthread_mutex_lock (&mutex); - armed = doit; - } - ~passwd_lock () - { - if (armed) - pthread_mutex_unlock (&mutex); - } -}; - -pthread_mutex_t NO_COPY passwd_lock::mutex = (pthread_mutex_t) PTHREAD_MUTEX_INITIALIZER; - -/* Read in /etc/passwd and save contents in the password cache. - This sets passwd_state to loaded or emulated so functions in this file can - tell that /etc/passwd has been read in or will be emulated. */ -void -read_etc_passwd () -{ - static pwdgrp_read pr; - - /* A mutex is ok for speed here - pthreads will use critical sections not - * mutexes for non-shared mutexes in the future. Also, this function will - * at most be called once from each thread, after that the passwd_state - * test will succeed */ - passwd_lock here (cygwin_finished_initializing); - - /* if we got blocked by the mutex, then etc_passwd may have been processed */ - if (passwd_state != uninitialized) - return; - - if (passwd_state != initializing) - { - passwd_state = initializing; - if (pr.open ("/etc/passwd")) - { - char *line; - while ((line = pr.gets ()) != NULL) - if (strlen (line)) - add_pwd_line (line); - - passwd_state.set_last_modified (pr.get_fhandle(), pr.get_fname ()); - passwd_state = loaded; - pr.close (); - debug_printf ("Read /etc/passwd, %d lines", curr_lines); - } - else - { - static char linebuf[1024]; - - if (wincap.has_security ()) - { - HANDLE ptok; - cygsid tu, tg; - DWORD siz; - - if (OpenProcessToken (hMainProc, TOKEN_QUERY, &ptok)) - { - if (GetTokenInformation (ptok, TokenUser, &tu, sizeof tu, - &siz) - && GetTokenInformation (ptok, TokenPrimaryGroup, &tg, - sizeof tg, &siz)) - { - char strbuf[100]; - snprintf (linebuf, sizeof (linebuf), - "%s::%lu:%lu:%s:%s:/bin/sh", - cygheap->user.name (), - *GetSidSubAuthority(tu, - *GetSidSubAuthorityCount(tu) - 1), - *GetSidSubAuthority(tg, - *GetSidSubAuthorityCount(tg) - 1), - tu.string (strbuf), getenv ("HOME") ?: "/"); - debug_printf ("Emulating /etc/passwd: %s", linebuf); - add_pwd_line (linebuf); - passwd_state = emulated; - } - CloseHandle (ptok); - } - } - if (passwd_state != emulated) - { - snprintf (linebuf, sizeof (linebuf), "%s::%u:%u::%s:/bin/sh", - cygheap->user.name (), (unsigned) DEFAULT_UID, - (unsigned) DEFAULT_GID, getenv ("HOME") ?: "/"); - debug_printf ("Emulating /etc/passwd: %s", linebuf); - add_pwd_line (linebuf); - passwd_state = emulated; - } - } - - } - - return; -} - -/* Cygwin internal */ -/* If this ever becomes non-reentrant, update all the getpw*_r functions */ -static struct passwd * -search_for (__uid32_t uid, const char *name) -{ - struct passwd *res = 0; - struct passwd *default_pw = 0; - - for (int i = 0; i < curr_lines; i++) - { - res = passwd_buf + i; - if (res->pw_uid == DEFAULT_UID) - default_pw = res; - /* on Windows NT user names are case-insensitive */ - if (name) - { - if (strcasematch (name, res->pw_name)) - return res; - } - else if (uid == (__uid32_t) res->pw_uid) - return res; - } - - /* Return default passwd entry if passwd is emulated or it's a - request for the current user. */ - if (passwd_state != loaded - || (!name && uid == myself->uid) - || (name && strcasematch (name, cygheap->user.name ()))) - return default_pw; - - return NULL; -} - -extern "C" struct passwd * -getpwuid32 (__uid32_t uid) -{ - if (passwd_state <= initializing) - read_etc_passwd (); - - pthread_testcancel(); - - return search_for (uid, 0); -} - -extern "C" struct passwd * -getpwuid (__uid16_t uid) -{ - return getpwuid32 (uid16touid32 (uid)); -} - -extern "C" int -getpwuid_r32 (__uid32_t uid, struct passwd *pwd, char *buffer, size_t bufsize, struct passwd **result) -{ - *result = NULL; - - if (!pwd || !buffer) - return ERANGE; - - if (passwd_state <= initializing) - read_etc_passwd (); - - pthread_testcancel(); - - struct passwd *temppw = search_for (uid, 0); - - if (!temppw) - return 0; - - /* check needed buffer size. */ - size_t needsize = strlen (temppw->pw_name) + strlen (temppw->pw_dir) + - strlen (temppw->pw_shell) + strlen (temppw->pw_gecos) + - strlen (temppw->pw_passwd) + 5; - if (needsize > bufsize) - return ERANGE; - - /* make a copy of temppw */ - *result = pwd; - pwd->pw_uid = temppw->pw_uid; - pwd->pw_gid = temppw->pw_gid; - pwd->pw_name = buffer; - pwd->pw_dir = pwd->pw_name + strlen (temppw->pw_name) + 1; - pwd->pw_shell = pwd->pw_dir + strlen (temppw->pw_dir) + 1; - pwd->pw_gecos = pwd->pw_shell + strlen (temppw->pw_shell) + 1; - pwd->pw_passwd = pwd->pw_gecos + strlen (temppw->pw_gecos) + 1; - strcpy (pwd->pw_name, temppw->pw_name); - strcpy (pwd->pw_dir, temppw->pw_dir); - strcpy (pwd->pw_shell, temppw->pw_shell); - strcpy (pwd->pw_gecos, temppw->pw_gecos); - strcpy (pwd->pw_passwd, temppw->pw_passwd); - return 0; -} - -extern "C" int -getpwuid_r (__uid16_t uid, struct passwd *pwd, char *buffer, size_t bufsize, struct passwd **result) -{ - return getpwuid_r32 (uid16touid32 (uid), pwd, buffer, bufsize, result); -} - -extern "C" struct passwd * -getpwnam (const char *name) -{ - if (passwd_state <= initializing) - read_etc_passwd (); - - pthread_testcancel(); - - return search_for (0, name); -} - - -/* the max size buffer we can expect to - * use is returned via sysconf with _SC_GETPW_R_SIZE_MAX. - * This may need updating! - Rob Collins April 2001. - */ -extern "C" int -getpwnam_r (const char *nam, struct passwd *pwd, char *buffer, size_t bufsize, struct passwd **result) -{ - *result = NULL; - - if (!pwd || !buffer || !nam) - return ERANGE; - - if (passwd_state <= initializing) - read_etc_passwd (); - - pthread_testcancel(); - - struct passwd *temppw = search_for (0, nam); - - if (!temppw) - return 0; - - /* check needed buffer size. */ - size_t needsize = strlen (temppw->pw_name) + strlen (temppw->pw_dir) + - strlen (temppw->pw_shell) + strlen (temppw->pw_gecos) + - strlen (temppw->pw_passwd) + 5; - if (needsize > bufsize) - return ERANGE; - - /* make a copy of temppw */ - *result = pwd; - pwd->pw_uid = temppw->pw_uid; - pwd->pw_gid = temppw->pw_gid; - pwd->pw_name = buffer; - pwd->pw_dir = pwd->pw_name + strlen (temppw->pw_name) + 1; - pwd->pw_shell = pwd->pw_dir + strlen (temppw->pw_dir) + 1; - pwd->pw_gecos = pwd->pw_shell + strlen (temppw->pw_shell) + 1; - pwd->pw_passwd = pwd->pw_gecos + strlen (temppw->pw_gecos) + 1; - strcpy (pwd->pw_name, temppw->pw_name); - strcpy (pwd->pw_dir, temppw->pw_dir); - strcpy (pwd->pw_shell, temppw->pw_shell); - strcpy (pwd->pw_gecos, temppw->pw_gecos); - strcpy (pwd->pw_passwd, temppw->pw_passwd); - return 0; -} - -extern "C" struct passwd * -getpwent (void) -{ - if (passwd_state <= initializing) - read_etc_passwd (); - - if (pw_pos < curr_lines) - return passwd_buf + pw_pos++; - - return NULL; -} - -extern "C" struct passwd * -getpwduid (__uid16_t) -{ - return NULL; -} - -extern "C" void -setpwent (void) -{ - pw_pos = 0; -} - -extern "C" void -endpwent (void) -{ - pw_pos = 0; -} - -extern "C" int -setpassent () -{ - return 0; -} - -/* Internal function. ONLY USE THIS INTERNALLY, NEVER `getpwent'!!! */ -struct passwd * -internal_getpwent (int pos) -{ - if (passwd_state <= initializing) - read_etc_passwd (); - - if (pos < curr_lines) - return passwd_buf + pos; - return NULL; -} - -extern "C" char * -getpass (const char * prompt) -{ -#ifdef _MT_SAFE - char *pass=_reent_winsup ()->_pass; -#else - static char pass[_PASSWORD_LEN]; -#endif - struct termios ti, newti; - - if (passwd_state <= initializing) - read_etc_passwd (); - - cygheap_fdget fhstdin (0); - - if (fhstdin < 0) - pass[0] = '\0'; - else - { - fhstdin->tcgetattr (&ti); - newti = ti; - newti.c_lflag &= ~ECHO; - fhstdin->tcsetattr (TCSANOW, &newti); - fputs (prompt, stderr); - fgets (pass, _PASSWORD_LEN, stdin); - fprintf (stderr, "\n"); - for (int i=0; pass[i]; i++) - if (pass[i] == '\r' || pass[i] == '\n') - pass[i] = '\0'; - fhstdin->tcsetattr (TCSANOW, &ti); - } - return pass; -} |