72 lines
1.7 KiB
C++
72 lines
1.7 KiB
C++
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/* $OpenBSD: strerror_r.c,v 1.6 2005/08/08 08:05:37 espie Exp $ */
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/* Public Domain <marc@snafu.org> */
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#include <errno.h>
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#include <limits.h>
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#include <signal.h>
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#include <stdio.h>
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#include <string.h>
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struct Pair {
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int code;
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const char* msg;
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};
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static const char* __code_string_lookup(const Pair* strings, int code) {
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for (size_t i = 0; strings[i].msg != NULL; ++i) {
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if (strings[i].code == code) {
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return strings[i].msg;
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}
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}
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return NULL;
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}
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static const Pair _sys_error_strings[] = {
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#define __BIONIC_ERRDEF(x,y,z) { x, z },
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#include <sys/_errdefs.h>
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{ 0, NULL }
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};
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int strerror_r(int error_number, char* buf, size_t buf_len) {
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int saved_errno = errno;
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size_t length;
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const char* error_name = __code_string_lookup(_sys_error_strings, error_number);
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if (error_name != NULL) {
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length = snprintf(buf, buf_len, "%s", error_name);
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} else {
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length = snprintf(buf, buf_len, "Unknown error %u", error_number);
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}
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if (length >= buf_len) {
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errno = ERANGE;
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return -1;
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}
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errno = saved_errno;
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return 0;
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}
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static const Pair _sys_signal_strings[] = {
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#define __BIONIC_SIGDEF(x,y,z) { y, z },
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#include <sys/_sigdefs.h>
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{ 0, NULL }
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};
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extern "C" const char* __strsignal(int signal_number, char* buf, size_t buf_len) {
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const char* signal_name = __code_string_lookup(_sys_signal_strings, signal_number);
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if (signal_name != NULL) {
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return signal_name;
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}
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const char* prefix = "Unknown";
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if (signal_number >= SIGRTMIN && signal_number <= SIGRTMAX) {
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prefix = "Real-time";
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signal_number -= SIGRTMIN;
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}
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size_t length = snprintf(buf, buf_len, "%s signal %d", prefix, signal_number);
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if (length >= buf_len) {
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return NULL;
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}
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return buf;
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}
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