mirror of
https://github.com/MariaDB/server.git
synced 2025-01-18 21:12:26 +01:00
a3e5737abd
~40Mb after mysqldump/import
When the input string exceeds the maximum allowed size for the
internal buffer, batch_readline() returns a truncated string.
Since there was no way for a caller to determine whether the
string was truncated or not, the command line client assumed
batch_readline() to always return the whole input string and
appended a newline character. This resulted in garbled data
when importing dumps containing strings longer than the
maximum input buffer size.
Fixed by adding a flag to the batch_readline() interface to
signal a truncated string to the caller.
Other minor problems fixed during patch implementation:
- The maximum allowed buffer size for batch_readline() was set
up depending on the client's max_allowed_packet value. It does
not actully make any sense, as those variables are not
related. The input buffer size limit is now always set to 1
MB.
- fill_buffer() did not always set the EOF flag.
- The input buffer could actually grow twice as the specified
limit due to insufficient checks in intern_read_line().
33 lines
1.3 KiB
C
33 lines
1.3 KiB
C
/* Copyright (C) 2000 MySQL AB
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
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/* readline for batch mode */
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typedef struct st_line_buffer
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{
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File file;
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char *buffer; /* The buffer itself, grown as needed. */
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char *end; /* Pointer at buffer end */
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char *start_of_line,*end_of_line;
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uint bufread; /* Number of bytes to get with each read(). */
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uint eof;
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ulong max_size;
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ulong read_length; /* Length of last read string */
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} LINE_BUFFER;
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extern LINE_BUFFER *batch_readline_init(ulong max_size,FILE *file);
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extern LINE_BUFFER *batch_readline_command(LINE_BUFFER *buffer, my_string str);
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extern char *batch_readline(LINE_BUFFER *buffer, bool *truncated);
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extern void batch_readline_end(LINE_BUFFER *buffer);
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