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author | Martin Nagy <mnagy@redhat.com> | 2009-02-11 20:37:59 +0100 |
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committer | Martin Nagy <mnagy@redhat.com> | 2009-02-11 20:37:59 +0100 |
commit | f50ae72ec3417cae55dd4e085991c01af9fdc5f1 (patch) | |
tree | 0e36c9a3320f6d068df93d3ff6d84b821d23db40 /lib/isc/unix/strerror.c | |
download | bind_dynamic-f50ae72ec3417cae55dd4e085991c01af9fdc5f1.tar.gz bind_dynamic-f50ae72ec3417cae55dd4e085991c01af9fdc5f1.tar.xz bind_dynamic-f50ae72ec3417cae55dd4e085991c01af9fdc5f1.zip |
Initial commitstart
Diffstat (limited to 'lib/isc/unix/strerror.c')
-rw-r--r-- | lib/isc/unix/strerror.c | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/lib/isc/unix/strerror.c b/lib/isc/unix/strerror.c new file mode 100644 index 0000000..42a7a8e --- /dev/null +++ b/lib/isc/unix/strerror.c @@ -0,0 +1,74 @@ +/* + * Copyright (C) 2004, 2005, 2007 Internet Systems Consortium, Inc. ("ISC") + * Copyright (C) 2001 Internet Software Consortium. + * + * Permission to use, copy, modify, and/or distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH + * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY + * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT, + * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM + * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE + * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR + * PERFORMANCE OF THIS SOFTWARE. + */ + +/* $Id: strerror.c,v 1.8 2007/06/19 23:47:18 tbox Exp $ */ + +/*! \file */ + +#include <config.h> + +#include <stdio.h> +#include <string.h> + +#include <isc/mutex.h> +#include <isc/once.h> +#include <isc/print.h> +#include <isc/strerror.h> +#include <isc/util.h> + +#ifdef HAVE_STRERROR +/*% + * We need to do this this way for profiled locks. + */ +static isc_mutex_t isc_strerror_lock; +static void init_lock(void) { + RUNTIME_CHECK(isc_mutex_init(&isc_strerror_lock) == ISC_R_SUCCESS); +} +#else +extern const char * const sys_errlist[]; +extern const int sys_nerr; +#endif + +void +isc__strerror(int num, char *buf, size_t size) { +#ifdef HAVE_STRERROR + char *msg; + unsigned int unum = num; + static isc_once_t once = ISC_ONCE_INIT; + + REQUIRE(buf != NULL); + + RUNTIME_CHECK(isc_once_do(&once, init_lock) == ISC_R_SUCCESS); + + LOCK(&isc_strerror_lock); + msg = strerror(num); + if (msg != NULL) + snprintf(buf, size, "%s", msg); + else + snprintf(buf, size, "Unknown error: %u", unum); + UNLOCK(&isc_strerror_lock); +#else + unsigned int unum = num; + + REQUIRE(buf != NULL); + + if (num >= 0 && num < sys_nerr) + snprintf(buf, size, "%s", sys_errlist[num]); + else + snprintf(buf, size, "Unknown error: %u", unum); +#endif +} |