diff options
Diffstat (limited to 'mysql/mysys/my_open.c')
| -rw-r--r-- | mysql/mysys/my_open.c | 194 |
1 files changed, 194 insertions, 0 deletions
diff --git a/mysql/mysys/my_open.c b/mysql/mysys/my_open.c new file mode 100644 index 0000000..b67ac6f --- /dev/null +++ b/mysql/mysys/my_open.c @@ -0,0 +1,194 @@ +/* Copyright (c) 2000, 2015, Oracle and/or its affiliates. All rights reserved. + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; version 2 of the License. + + This program 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 General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ + +#include "mysys_priv.h" +#include "my_sys.h" +#include "mysys_err.h" +#include <my_dir.h> +#include <errno.h> +#include "my_thread_local.h" + + +/* + Open a file + + SYNOPSIS + my_open() + FileName Fully qualified file name + Flags Read | write + MyFlags Special flags + + RETURN VALUE + File descriptor +*/ + +File my_open(const char *FileName, int Flags, myf MyFlags) + /* Path-name of file */ + /* Read | write .. */ + /* Special flags */ +{ + File fd; + DBUG_ENTER("my_open"); + DBUG_PRINT("my",("Name: '%s' Flags: %d MyFlags: %d", + FileName, Flags, MyFlags)); +#if defined(_WIN32) + fd= my_win_open(FileName, Flags); +#else + fd = open(FileName, Flags, my_umask); /* Normal unix */ +#endif + + fd= my_register_filename(fd, FileName, FILE_BY_OPEN, EE_FILENOTFOUND, MyFlags); + DBUG_RETURN(fd); +} /* my_open */ + + +/* + Close a file + + SYNOPSIS + my_close() + fd File sescriptor + myf Special Flags + +*/ + +int my_close(File fd, myf MyFlags) +{ + int err; + DBUG_ENTER("my_close"); + DBUG_PRINT("my",("fd: %d MyFlags: %d",fd, MyFlags)); + + mysql_mutex_lock(&THR_LOCK_open); +#ifndef _WIN32 + do + { + err= close(fd); + } while (err == -1 && errno == EINTR); +#else + err= my_win_close(fd); +#endif + if (err) + { + DBUG_PRINT("error",("Got error %d on close",err)); + set_my_errno(errno); + if (MyFlags & (MY_FAE | MY_WME)) + { + char errbuf[MYSYS_STRERROR_SIZE]; + my_error(EE_BADCLOSE, MYF(0), my_filename(fd), + my_errno(), my_strerror(errbuf, sizeof(errbuf), my_errno())); + } + } + if ((uint) fd < my_file_limit && my_file_info[fd].type != UNOPEN) + { + my_free(my_file_info[fd].name); + my_file_info[fd].type = UNOPEN; + } + my_file_opened--; + mysql_mutex_unlock(&THR_LOCK_open); + DBUG_RETURN(err); +} /* my_close */ + + +/* + Register file in my_file_info[] + + SYNOPSIS + my_register_filename() + fd File number opened, -1 if error on open + FileName File name + type_file_type How file was created + error_message_number Error message number if caller got error (fd == -1) + MyFlags Flags for my_close() + + RETURN + -1 error + # Filenumber + +*/ + +File my_register_filename(File fd, const char *FileName, enum file_type + type_of_file, uint error_message_number, myf MyFlags) +{ + char *dup_filename= NULL; + DBUG_ENTER("my_register_filename"); + if ((int) fd >= MY_FILE_MIN) + { + if ((uint) fd >= my_file_limit) + { +#if defined(_WIN32) + set_my_errno(EMFILE); +#else + mysql_mutex_lock(&THR_LOCK_open); + my_file_opened++; + mysql_mutex_unlock(&THR_LOCK_open); + DBUG_RETURN(fd); /* safeguard */ +#endif + } + else + { + dup_filename= my_strdup(key_memory_my_file_info, FileName, MyFlags); + if (dup_filename != NULL) + { + mysql_mutex_lock(&THR_LOCK_open); + my_file_info[fd].name= dup_filename; + my_file_opened++; + my_file_total_opened++; + my_file_info[fd].type = type_of_file; + mysql_mutex_unlock(&THR_LOCK_open); + DBUG_PRINT("exit",("fd: %d",fd)); + DBUG_RETURN(fd); + } + set_my_errno(ENOMEM); + } + (void) my_close(fd, MyFlags); + } + else + set_my_errno(errno); + + DBUG_PRINT("error",("Got error %d on open", my_errno())); + if (MyFlags & (MY_FFNF | MY_FAE | MY_WME)) + { + char errbuf[MYSYS_STRERROR_SIZE]; + if (my_errno() == EMFILE) + error_message_number= EE_OUT_OF_FILERESOURCES; + DBUG_PRINT("error",("print err: %d",error_message_number)); + my_error(error_message_number, MYF(0), FileName, + my_errno(), my_strerror(errbuf, sizeof(errbuf), my_errno())); + } + DBUG_RETURN(-1); +} + + + + +#ifdef EXTRA_DEBUG + +void my_print_open_files(void) +{ + if (my_file_opened | my_stream_opened) + { + uint i; + for (i= 0 ; i < my_file_limit ; i++) + { + if (my_file_info[i].type != UNOPEN) + { + my_message_local(INFORMATION_LEVEL, + EE(EE_FILE_NOT_CLOSED), my_file_info[i].name, i); + } + } + } +} + +#endif |