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config: support values longer than 1023 bytes

parse_value in config.c has a static buffer of 1024 bytes that it
parse the value into. This can sometimes be a problem when a
config file contains very long values.

It's particularly amusing that git-config already is able to write
such files, so it should probably be able to read them as well.

Fix this by using a strbuf instead of a fixed-size buffer.

Signed-off-by: Erik Faye-Lund <kusmabite@gmail.com>
Acked-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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commit e96c19c50fb0807570b85cb5b8aae6dfcfa9b9ec 1 parent 5e7a5d9
@kusma kusma authored gitster committed
Showing with 9 additions and 11 deletions.
  1. +8 −10 config.c
  2. +1 −1  t/t1303-wacky-config.sh
View
18 config.c
@@ -46,23 +46,21 @@ static int get_next_char(void)
static char *parse_value(void)
{
- static char value[1024];
- int quote = 0, comment = 0, len = 0, space = 0;
+ static struct strbuf value = STRBUF_INIT;
+ int quote = 0, comment = 0, space = 0;
+ strbuf_reset(&value);
for (;;) {
int c = get_next_char();
- if (len >= sizeof(value) - 1)
- return NULL;
if (c == '\n') {
if (quote)
return NULL;
- value[len] = 0;
- return value;
+ return value.buf;
}
if (comment)
continue;
if (isspace(c) && !quote) {
- if (len)
+ if (value.len)
space++;
continue;
}
@@ -73,7 +71,7 @@ static char *parse_value(void)
}
}
for (; space; space--)
- value[len++] = ' ';
+ strbuf_addch(&value, ' ');
if (c == '\\') {
c = get_next_char();
switch (c) {
@@ -95,14 +93,14 @@ static char *parse_value(void)
default:
return NULL;
}
- value[len++] = c;
+ strbuf_addch(&value, c);
continue;
}
if (c == '"') {
quote = 1-quote;
continue;
}
- value[len++] = c;
+ strbuf_addch(&value, c);
}
}
View
2  t/t1303-wacky-config.sh
@@ -44,7 +44,7 @@ LONG_VALUE=$(printf "x%01021dx a" 7)
test_expect_success 'do not crash on special long config line' '
setup &&
git config section.key "$LONG_VALUE" &&
- check section.key "fatal: bad config file line 2 in .git/config"
+ check section.key "$LONG_VALUE"
'
test_done
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