diff options
| author | Jakob Kaivo <jkk@ung.org> | 2024-01-31 21:19:25 -0500 |
|---|---|---|
| committer | Jakob Kaivo <jkk@ung.org> | 2024-01-31 21:19:25 -0500 |
| commit | 793dc7764c5ae619c476646ca5e3bfa5e5f150d5 (patch) | |
| tree | 3557c19c872416774ba135b2c5d88afbdffed797 | |
| parent | 1e85d81f5b4773275471fe7bbc707e8d64fb0a08 (diff) | |
UB on invalid lengths
| -rw-r--r-- | src/stdio/__printf.c | 20 |
1 files changed, 18 insertions, 2 deletions
diff --git a/src/stdio/__printf.c b/src/stdio/__printf.c index db34e288..14170099 100644 --- a/src/stdio/__printf.c +++ b/src/stdio/__printf.c @@ -205,9 +205,25 @@ int (__printf)(struct io_options *opt, const char * format, va_list arg) } if ((flags & ALT) && (!strchr("xXaAeEfFgG", format[i]))) { - __undefined("In call to %s(): The # flag is undefined for %%%c", opt->fnname, format[i]); + __undefined("In call to %s(): The '#' flag is undefined for %%%c", opt->fnname, format[i]); } else if ((flags & ZERO) && (!strchr("diouxXaAeEfFgG", format[i]))) { - __undefined("In call to %s(): The 0 flag is undefined for %%%c", opt->fnname, format[i]); + __undefined("In call to %s(): The '0' flag is undefined for %%%c", opt->fnname, format[i]); + } else if ((length == hh) && (!strchr("diouxXn", format[i]))) { + __undefined("In call to %s(): The length 'hh' is undefined for %%%c", opt->fnname, format[i]); + } else if ((length == h) && (!strchr("diouxXn", format[i]))) { + __undefined("In call to %s(): The length 'h' is undefined for %%%c", opt->fnname, format[i]); + } else if ((length == l) && (!strchr("diouxXncsaAeEfFgG", format[i]))) { + __undefined("In call to %s(): The length 'l' is undefined for %%%c", opt->fnname, format[i]); + } else if ((length == ll) && (!strchr("diouxXn", format[i]))) { + __undefined("In call to %s(): The length 'll' is undefined for %%%c", opt->fnname, format[i]); + } else if ((length == j) && (!strchr("diouxXn", format[i]))) { + __undefined("In call to %s(): The length 'j' is undefined for %%%c", opt->fnname, format[i]); + } else if ((length == z) && (!strchr("diouxXn", format[i]))) { + __undefined("In call to %s(): The length 'z' is undefined for %%%c", opt->fnname, format[i]); + } else if ((length == t) && (!strchr("diouxXn", format[i]))) { + __undefined("In call to %s(): The length 't' is undefined for %%%c", opt->fnname, format[i]); + } else if ((length == L) && (!strchr("aAeEfFgG", format[i]))) { + __undefined("In call to %s(): The length 'L' is undefined for %%%c", opt->fnname, format[i]); } switch (format[i]) { |