From a175314c3e5827eb193872241446f2f8f5c9d33c Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sat, 4 May 2024 20:07:14 +0200 Subject: Adding upstream version 1:10.5.12. Signed-off-by: Daniel Baumann --- mysys/my_write.c | 120 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 120 insertions(+) create mode 100644 mysys/my_write.c (limited to 'mysys/my_write.c') diff --git a/mysys/my_write.c b/mysys/my_write.c new file mode 100644 index 00000000..06914b25 --- /dev/null +++ b/mysys/my_write.c @@ -0,0 +1,120 @@ +/* Copyright (c) 2000, 2016, Oracle and/or its affiliates. + Copyright (c) 2011, 2016, MariaDB + + 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 02110-1335 USA */ + +#include "mysys_priv.h" +#include "mysys_err.h" +#include + + + /* Write a chunk of bytes to a file */ + +size_t my_write(File Filedes, const uchar *Buffer, size_t Count, myf MyFlags) +{ + size_t writtenbytes, written; + uint errors; + DBUG_ENTER("my_write"); + DBUG_PRINT("my",("fd: %d Buffer: %p Count: %lu MyFlags: %lu", + Filedes, Buffer, (ulong) Count, MyFlags)); + errors= 0; written= 0; + if (!(MyFlags & (MY_WME | MY_FAE | MY_FNABP))) + MyFlags|= my_global_flags; + + /* The behavior of write(fd, buf, 0) is not portable */ + if (unlikely(!Count)) + DBUG_RETURN(0); + + for (;;) + { +#ifdef _WIN32 + if(Filedes < 0) + { + my_errno= errno= EBADF; + DBUG_RETURN((size_t)-1); + } + writtenbytes= my_win_write(Filedes, Buffer, Count); +#else + writtenbytes= write(Filedes, Buffer, Count); +#endif + + /** + To simulate the write error set the errno = error code + and the number pf written bytes to -1. + */ + DBUG_EXECUTE_IF ("simulate_file_write_error", + if (!errors) { + errno= ENOSPC; + writtenbytes= (size_t) -1; + }); + + if (writtenbytes == Count) + break; + if (writtenbytes != (size_t) -1) + { /* Safeguard */ + written+= writtenbytes; + Buffer+= writtenbytes; + Count-= writtenbytes; + } + my_errno= errno; + DBUG_PRINT("error",("Write only %ld bytes, error: %d", + (long) writtenbytes, my_errno)); +#ifndef NO_BACKGROUND + if (my_thread_var->abort) + MyFlags&= ~ MY_WAIT_IF_FULL; /* End if aborted by user */ + + if ((my_errno == ENOSPC || my_errno == EDQUOT) && + (MyFlags & MY_WAIT_IF_FULL)) + { + wait_for_free_space(my_filename(Filedes), errors); + errors++; + continue; + } + + if ((writtenbytes == 0 || writtenbytes == (size_t) -1)) + { + if (my_errno == EINTR) + { + DBUG_PRINT("debug", ("my_write() was interrupted and returned %ld", + (long) writtenbytes)); + continue; /* Interrupted */ + } + + if (!writtenbytes && !errors++) /* Retry once */ + { + /* We may come here if the file quota is exeeded */ + errno= EFBIG; /* Assume this is the error */ + continue; + } + } + else + continue; /* Retry */ +#endif + + /* Don't give a warning if it's ok that we only write part of the data */ + if (MyFlags & (MY_NABP | MY_FNABP)) + { + if (MyFlags & (MY_WME | MY_FAE | MY_FNABP)) + { + my_error(EE_WRITE, MYF(ME_BELL | (MyFlags & (ME_NOTE | ME_ERROR_LOG))), + my_filename(Filedes),my_errno); + } + DBUG_RETURN(MY_FILE_ERROR); /* Error on read */ + } + break; /* Return bytes written */ + } + if (MyFlags & (MY_NABP | MY_FNABP)) + DBUG_RETURN(0); /* Want only errors */ + DBUG_RETURN(writtenbytes+written); +} /* my_write */ -- cgit v1.2.3