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log:Sanitize string of most control chars before printing.

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This may be security relevant depending upon the used terminal.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2011-03-25 00:20:07 +01:00
parent eea4fa0591
commit 0a51362b3f
1 changed files with 10 additions and 1 deletions
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11
libavutil/log.c
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@ -82,6 +82,14 @@ const char* av_default_item_name(void* ptr){
return (*(AVClass**)ptr)->class_name;
}
static void sanitize(uint8_t *line){
while(*line){
if(*line < 0x08 || (*line > 0x0D && *line < 0x20))
*line='?';
line++;
}
}
void av_log_default_callback(void* ptr, int level, const char* fmt, va_list vl)
{
static int print_prefix=1;
@ -121,8 +129,9 @@ void av_log_default_callback(void* ptr, int level, const char* fmt, va_list vl)
fprintf(stderr, " Last message repeated %d times\n", count);
count=0;
}
colored_fputs(av_clip(level>>3, 0, 6), line);
strcpy(prev, line);
sanitize(line);
colored_fputs(av_clip(level>>3, 0, 6), line);
}
static void (*av_log_callback)(void*, int, const char*, va_list) = av_log_default_callback;