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Fix buffer overflow on particularly named files and clarify documentation about

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output file naming.

Patch by Tsunakawa, Takayuki <tsunakawa.takay@jp.fujitsu.com>
This commit is contained in:
Michael Meskes 2016-12-22 08:28:13 +01:00
parent ea0aa9698c
commit 4032ef18d0
2 changed files with 5 additions and 6 deletions
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8
doc/src/sgml/ref/ecpg-ref.sgml
View File

@ -42,11 +42,9 @@ PostgreSQL documentation
<para> <para>
<command>ecpg</command> will convert each input file given on the <command>ecpg</command> will convert each input file given on the
command line to the corresponding C output file. Input files command line to the corresponding C output file. Input files
preferably have the extension <filename>.pgc</filename>, in which preferably have the extension <filename>.pgc</filename>.
case the extension will be replaced by <filename>.c</filename> to The extension will be replaced by <filename>.c</filename> to
determine the output file name. If the extension of the input file determine the output file name.
is not <filename>.pgc</filename>, then the output file name is
computed by appending <literal>.c</literal> to the full file name.
The output file name can also be overridden using the The output file name can also be overridden using the
<option>-o</option> option. <option>-o</option> option.
</para> </para>

3
src/interfaces/ecpg/preproc/ecpg.c
View File

@ -313,7 +313,8 @@ main(int argc, char *const argv[])
base_yyout = stdout; base_yyout = stdout;
else else
{ {
output_filename = mm_strdup(input_filename); output_filename = mm_alloc(strlen(input_filename) + 3);
strcpy(output_filename, input_filename);
ptr2ext = strrchr(output_filename, '.'); ptr2ext = strrchr(output_filename, '.');
/* make extension = .c resp. .h */ /* make extension = .c resp. .h */