diff options
| author | Otto Moerbeek <otto@cvs.openbsd.org> | 2005-05-08 06:25:45 +0000 |
|---|---|---|
| committer | Otto Moerbeek <otto@cvs.openbsd.org> | 2005-05-08 06:25:45 +0000 |
| commit | 1203a91023303369e685c9b321ea63a821b906d9 (patch) | |
| tree | b0b59aaf14466f30bb23d0b1ffdf0acc2f940e0e /lib/libc | |
| parent | bfee6ea4078b7804a9d191cc74f080ddf73184f6 (diff) | |
Only append number when it fits to avoid truncation and return
appropriate error number. ok miod@, millert@ on an earlier version;
ok jaredey@
Diffstat (limited to 'lib/libc')
| -rw-r--r-- | lib/libc/string/strerror_r.c | 25 |
1 files changed, 11 insertions, 14 deletions
diff --git a/lib/libc/string/strerror_r.c b/lib/libc/string/strerror_r.c index c0ca434cbde..28bfd00a47e 100644 --- a/lib/libc/string/strerror_r.c +++ b/lib/libc/string/strerror_r.c @@ -1,8 +1,8 @@ -/* $OpenBSD: strerror_r.c,v 1.3 2005/04/20 23:38:15 beck Exp $ */ +/* $OpenBSD: strerror_r.c,v 1.4 2005/05/08 06:25:44 otto Exp $ */ /* Public Domain <marc@snafu.org> */ #if defined(LIBC_SCCS) && !defined(lint) -static char *rcsid = "$OpenBSD: strerror_r.c,v 1.3 2005/04/20 23:38:15 beck Exp $"; +static char *rcsid = "$OpenBSD: strerror_r.c,v 1.4 2005/05/08 06:25:44 otto Exp $"; #endif /* LIBC_SCCS and not lint */ #ifdef NLS @@ -32,7 +32,7 @@ __digits10(unsigned int num) return i; } -static void +static int __itoa(int num, char *buffer, size_t start, size_t end) { size_t pos; @@ -54,21 +54,17 @@ __itoa(int num, char *buffer, size_t start, size_t end) if (pos < end) buffer[pos] = '\0'; - else { - if (end) - buffer[--end] = '\0'; /* XXX */ - } + else + return ERANGE; pos--; do { - - if (pos < end) - buffer[pos] = (a % 10) + '0'; + buffer[pos] = (a % 10) + '0'; pos--; a /= 10; } while (a != 0); if (neg) - if (pos < end) - buffer[pos] = '-'; + buffer[pos] = '-'; + return 0; } @@ -110,8 +106,9 @@ strerror_r(int errnum, char *strerrbuf, size_t buflen) if (len >= buflen) ret_errno = ERANGE; else { - __itoa(errnum, strerrbuf, len, buflen); - ret_errno = EINVAL; + ret_errno = __itoa(errnum, strerrbuf, len, buflen); + if (ret_errno == 0) + ret_errno = EINVAL; } } |