cosmopolitan/libc/str/strsignal.c

49 lines
2.7 KiB
C

/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2020 Justine Alexandra Roberts Tunney │
│ │
│ This program is free software; you can redistribute it and/or modify │
│ it under the terms of the GNU General Public License as published by │
│ the Free Software Foundation; version 2 of the License. │
│ │
│ This program is distributed in the hope that it will be useful, but │
│ WITHOUT ANY WARRANTY; without even the implied warranty of │
│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU │
│ General Public License for more details. │
│ │
│ You should have received a copy of the GNU General Public License │
│ along with this program; if not, write to the Free Software │
│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
│ 02110-1301 USA │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/bits/bits.h"
#include "libc/macros.h"
#include "libc/str/str.h"
static const char kSig[4] = "SIG";
static const char kUnknown[8] = "UNKNOWN";
alignas(1) static const char kStrSignals[][8] = {
"EXIT", "HUP", "INT", "QUIT", "ILL", "TRAP", "ABRT", "BUS",
"FPE", "KILL", "USR1", "SEGV", "USR2", "PIPE", "ALRM", "TERM",
"STKFLT", "CHLD", "CONT", "STOP", "TSTP", "TTIN", "TTOU", "URG",
"XCPU", "XFSZ", "VTALRM", "PROF", "WINCH", "IO", "PWR", "SYS",
};
static char g_strsignal[4 + 8];
/**
* Returns name associated with signal code.
* @see sigaction()
*/
char *strsignal(int sig) {
if (0 <= sig && (unsigned)sig < ARRAYLEN(kStrSignals)) {
memcpy(g_strsignal, kSig, 4);
memcpy(&g_strsignal[3], kStrSignals[sig], 8);
} else {
memcpy(g_strsignal, &kUnknown, 8);
}
return g_strsignal;
}