diff options
Diffstat (limited to 'HACKING')
| -rw-r--r-- | HACKING | 9 |
1 files changed, 5 insertions, 4 deletions
@@ -91,10 +91,11 @@ emulators. 4. String manipulation -Do not use the strncpy function. According to the man page, it does -*not* guarantee a NULL-terminated buffer, which makes it extremely dangerous -to use. Instead, use functionally equivalent function: -void pstrcpy(char *buf, int buf_size, const char *str) +Do not use the strncpy function. As mentioned in the man page, it does *not* +guarantee a NULL-terminated buffer, which makes it extremely dangerous to use. +It also zeros trailing destination bytes out to the specified length. Instead, +use this similar function when possible, but note its different signature: +void pstrcpy(char *dest, int dest_buf_size, const char *src) Don't use strcat because it can't check for buffer overflows, but: char *pstrcat(char *buf, int buf_size, const char *s) |