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Fix %c with nul character

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Fixes #417
This commit is contained in:
Justine Tunney 2022-06-12 22:25:42 -07:00
parent 91953dd308
commit 3c285337a2
2 changed files with 19 additions and 6 deletions
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16
libc/fmt/fmt.c
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@ -335,12 +335,16 @@ hidden int __fmt(void *fn, void *arg, const char *format, va_list va) {
break;
}
case 'c':
prec = 1;
flags |= FLAGS_PRECISION;
qchar = '\'';
p = charbuf;
charbuf[0] = va_arg(va, int);
goto FormatString;
if ((charbuf[0] = va_arg(va, int))) {
p = charbuf;
qchar = '\'';
flags |= FLAGS_PRECISION;
prec = 1;
goto FormatString;
} else {
__FMT_PUT('\0');
break;
}
case 'm':
p = weaken(strerror) ? weaken(strerror)(lasterr) : "?";
signbit = 0;