From 38f39368891d83c63e6f4aa3b00b19b80444b041 Mon Sep 17 00:00:00 2001 From: Corinna Vinschen Date: Wed, 5 Jun 2002 11:10:15 +0000 Subject: * grp.cc (etc_group): Removed. (parse_grp): Make line parameter nonconst. Don't copy data into new allocated memory. Check for CR instead of LF to accomodate new read method. (add_grp_line): Make line parameter nonconst. (read_etc_group): Rearrange using new pwdgrp_read class. * passwd.cc (parse_pwd): Don't copy data into new allocated memory. Check for CR instead of LF to accomodate new read method. (read_etc_passwd): Rearrange using new pwdgrp_read class. * pwdgrp.h (pwdgrp_check::set_last_modified): Use different parameters. (class pwdgrp_read): New class for opening and reading passwd and group files. --- winsup/cygwin/ChangeLog | 16 ++++++++ winsup/cygwin/grp.cc | 69 ++++++++++++------------------- winsup/cygwin/passwd.cc | 105 ++++++++++++++++++++++-------------------------- winsup/cygwin/pwdgrp.h | 79 +++++++++++++++++++++++++++++++++--- 4 files changed, 164 insertions(+), 105 deletions(-) diff --git a/winsup/cygwin/ChangeLog b/winsup/cygwin/ChangeLog index d4722d5b3..95f7d5efd 100644 --- a/winsup/cygwin/ChangeLog +++ b/winsup/cygwin/ChangeLog @@ -1,3 +1,19 @@ +2002-06-05 Corinna Vinschen + + * grp.cc (etc_group): Removed. + (parse_grp): Make line parameter nonconst. Don't copy data into new + allocated memory. Check for CR instead of LF to accomodate new + read method. + (add_grp_line): Make line parameter nonconst. + (read_etc_group): Rearrange using new pwdgrp_read class. + * passwd.cc (parse_pwd): Don't copy data into new allocated memory. + Check for CR instead of LF to accomodate new read method. + (read_etc_passwd): Rearrange using new pwdgrp_read class. + * pwdgrp.h (pwdgrp_check::set_last_modified): Use different + parameters. + (class pwdgrp_read): New class for opening and reading passwd and + group files. + 2002-06-04 Christopher Faylor * dtable.cc (handle_to_fn): Attempt to handle "raw" accesses to remote diff --git a/winsup/cygwin/grp.cc b/winsup/cygwin/grp.cc index 3511bcb92..13f74dd64 100644 --- a/winsup/cygwin/grp.cc +++ b/winsup/cygwin/grp.cc @@ -29,7 +29,6 @@ details. */ /* Read /etc/group only once for better performance. This is done on the first call that needs information from it. */ -static const char *etc_group NO_COPY = "/etc/group"; static struct __group32 *group_buf; /* group contents in memory */ static int curr_lines; static int max_lines; @@ -44,22 +43,19 @@ static int grp_pos = 0; static pwdgrp_check group_state; static int -parse_grp (struct __group32 &grp, const char *line) +parse_grp (struct __group32 &grp, char *line) { int len = strlen(line); - char *newline = (char *) malloc (len + 1); - (void) memcpy (newline, line, len + 1); + if (line[--len] == '\r') + line[len] = '\0'; - if (newline[--len] == '\n') - newline[len] = '\0'; - - char *dp = strchr (newline, ':'); + char *dp = strchr (line, ':'); if (!dp) return 0; *dp++ = '\0'; - grp.gr_name = newline; + grp.gr_name = line; grp.gr_passwd = dp; dp = strchr (grp.gr_passwd, ':'); @@ -104,7 +100,7 @@ parse_grp (struct __group32 &grp, const char *line) /* Read one line from /etc/group into the group cache */ static void -add_grp_line (const char *line) +add_grp_line (char *line) { if (curr_lines == max_lines) { @@ -143,11 +139,7 @@ pthread_mutex_t NO_COPY group_lock::mutex = (pthread_mutex_t) PTHREAD_MUTEX_INIT void read_etc_group () { - char linebuf [200]; - char group_name [UNLEN + 1]; - DWORD group_name_len = UNLEN + 1; - - strncpy (group_name, "Administrators", sizeof (group_name)); + static pwdgrp_read gr; group_lock here (cygwin_finished_initializing); @@ -158,49 +150,38 @@ read_etc_group () if (group_state != initializing) { group_state = initializing; - if (max_lines) /* When rereading, free allocated memory first. */ - { - for (int i = 0; i < curr_lines; ++i) - { - free (group_buf[i].gr_name); - free (group_buf[i].gr_mem); - } - curr_lines = 0; - } - - FILE *f = fopen (etc_group, "rt"); - - if (f) + if (gr.open ("/etc/group")) { - while (fgets (linebuf, sizeof (linebuf), f) != NULL) - { - if (strlen (linebuf)) - add_grp_line (linebuf); - } + char *line; + while ((line = gr.gets ()) != NULL) + if (strlen (line)) + add_grp_line (line); - group_state.set_last_modified (f); - fclose (f); + group_state.set_last_modified (gr.get_fhandle(), gr.get_fname ()); group_state = loaded; + gr.close (); + debug_printf ("Read /etc/group, %d lines", curr_lines); } else /* /etc/group doesn't exist -- create default one in memory */ { + char group_name [UNLEN + 1]; + DWORD group_name_len = UNLEN + 1; char domain_name [INTERNET_MAX_HOST_NAME_LENGTH + 1]; DWORD domain_name_len = INTERNET_MAX_HOST_NAME_LENGTH + 1; SID_NAME_USE acType; + static char linebuf [200]; + debug_printf ("Emulating /etc/group"); - if (! LookupAccountSidA (NULL , - well_known_admins_sid, - group_name, - &group_name_len, - domain_name, - &domain_name_len, - &acType)) + strncpy (group_name, "Administrators", sizeof (group_name)); + if (! LookupAccountSidA (NULL, well_known_admins_sid, group_name, + &group_name_len, domain_name, + &domain_name_len, &acType)) { strcpy (group_name, "unknown"); debug_printf ("Failed to get local admins group name. %E"); } - - snprintf (linebuf, sizeof (linebuf), "%s::%u:\n", group_name, (unsigned) DEFAULT_GID); + snprintf (linebuf, sizeof (linebuf), "%s::%u:\n", group_name, + (unsigned) DEFAULT_GID); add_grp_line (linebuf); group_state = emulated; } diff --git a/winsup/cygwin/passwd.cc b/winsup/cygwin/passwd.cc index efc73f52e..ac1ecf8f0 100644 --- a/winsup/cygwin/passwd.cc +++ b/winsup/cygwin/passwd.cc @@ -80,19 +80,17 @@ 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); - char *mybuf = (char *) malloc (len + 1); - (void) memcpy (mybuf, buf, len + 1); - if (mybuf[--len] == '\n') - mybuf[len] = '\0'; - - res.pw_name = grab_string (&mybuf); - res.pw_passwd = grab_string (&mybuf); - res.pw_uid = grab_int (&mybuf); - res.pw_gid = grab_int (&mybuf); + 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 (&mybuf); - res.pw_dir = grab_string (&mybuf); - res.pw_shell = grab_string (&mybuf); + 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 */ @@ -133,51 +131,46 @@ pthread_mutex_t NO_COPY passwd_lock::mutex = (pthread_mutex_t) PTHREAD_MUTEX_INI void read_etc_passwd () { - char linebuf[1024]; - /* A mutex is ok for speed here - pthreads will use critical sections not mutex's - * for non-shared mutexs 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 (max_lines) /* When rereading, free allocated memory first. */ - { - for (int i = 0; i < curr_lines; ++i) - free (passwd_buf[i].pw_name); - curr_lines = 0; - } - - FILE *f = fopen ("/etc/passwd", "rt"); - - if (f) - { - while (fgets (linebuf, sizeof (linebuf), f) != NULL) - { - if (strlen (linebuf)) - add_pwd_line (linebuf); - } - - passwd_state.set_last_modified (f); - fclose (f); - passwd_state = loaded; - } - else - { - debug_printf ("Emulating /etc/passwd"); - snprintf (linebuf, sizeof (linebuf), "%s::%u:%u::%s:/bin/sh", cygheap->user.name (), - (unsigned) DEFAULT_UID, (unsigned) DEFAULT_GID, getenv ("HOME") ?: "/"); - add_pwd_line (linebuf); - passwd_state = emulated; - } + 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[400]; + + debug_printf ("Emulating /etc/passwd"); + snprintf (linebuf, sizeof (linebuf), "%s::%u:%u::%s:/bin/sh", + cygheap->user.name (), (unsigned) DEFAULT_UID, + (unsigned) DEFAULT_GID, getenv ("HOME") ?: "/"); + add_pwd_line (linebuf); + passwd_state = emulated; + } + + } return; } diff --git a/winsup/cygwin/pwdgrp.h b/winsup/cygwin/pwdgrp.h index 568259db2..d2dcfcd1a 100644 --- a/winsup/cygwin/pwdgrp.h +++ b/winsup/cygwin/pwdgrp.h @@ -44,12 +44,81 @@ public: { state = nstate; } - void set_last_modified (FILE *f) + void set_last_modified (HANDLE fh, const char *name) { if (!file_w32[0]) - strcpy (file_w32, cygheap->fdtab[fileno (f)]->get_win32_name ()); - - GetFileTime (cygheap->fdtab[fileno (f)]->get_handle (), - NULL, NULL, &last_modified); + strcpy (file_w32, name); + GetFileTime (fh, NULL, NULL, &last_modified); } }; + +class pwdgrp_read { + path_conv pc; + HANDLE fh; + char *buf; + char *lptr, *eptr; + +public: + pwdgrp_read () + : fh (INVALID_HANDLE_VALUE), buf (NULL), lptr (NULL), eptr (NULL) {} + virtual ~pwdgrp_read () + { + close (); + if (buf) + free (buf); + } + + bool open (const char *posix_fname) + { + if (buf) + free (buf); + buf = lptr = eptr = NULL; + + pc.check (posix_fname); + if (pc.error || !pc.exists () || !pc.isdisk () || pc.isdir ()) + return false; + + fh = CreateFile (pc, GENERIC_READ, wincap.shared (), NULL, OPEN_EXISTING, + FILE_ATTRIBUTE_NORMAL, 0); + if (fh) + { + DWORD size = GetFileSize (fh, NULL), read_bytes; + buf = (char *) malloc (size + 1); + if (!ReadFile (fh, buf, size, &read_bytes, NULL)) + { + if (buf) + free (buf); + buf = NULL; + CloseHandle (fh); + fh = INVALID_HANDLE_VALUE; + return false; + } + buf[read_bytes] = '\0'; + return true; + } + return false; + } + char *gets () + { + if (!buf) + return NULL; + if (!lptr) + lptr = buf; + else if (!eptr) + return lptr = NULL; + else + lptr = eptr; + eptr = strchr (lptr, '\n'); + if (eptr) + *eptr++ = '\0'; + return lptr; + } + inline HANDLE get_fhandle () { return fh; } + inline const char *get_fname () { return pc; } + void close () + { + if (fh != INVALID_HANDLE_VALUE) + CloseHandle (fh); + fh = INVALID_HANDLE_VALUE; + } +}; -- cgit v1.2.3