| /* |
| * Copyright (c) 2023 Meta |
| * |
| * SPDX-License-Identifier: Apache-2.0 |
| */ |
| #include "posix/strsignal_table.h" |
| |
| #include <errno.h> |
| #include <stdio.h> |
| |
| #include <zephyr/posix/signal.h> |
| |
| #define SIGNO_WORD_IDX(_signo) (signo / BITS_PER_LONG) |
| #define SIGNO_WORD_BIT(_signo) (signo & BIT_MASK(LOG2(BITS_PER_LONG))) |
| |
| BUILD_ASSERT(CONFIG_POSIX_LIMITS_RTSIG_MAX >= 0); |
| BUILD_ASSERT(CONFIG_POSIX_RTSIG_MAX >= CONFIG_POSIX_LIMITS_RTSIG_MAX); |
| |
| static inline bool signo_valid(int signo) |
| { |
| return ((signo > 0) && (signo < _NSIG)); |
| } |
| |
| static inline bool signo_is_rt(int signo) |
| { |
| return ((signo >= SIGRTMIN) && (signo <= SIGRTMAX)); |
| } |
| |
| int sigemptyset(sigset_t *set) |
| { |
| *set = (sigset_t){0}; |
| return 0; |
| } |
| |
| int sigfillset(sigset_t *set) |
| { |
| for (int i = 0; i < ARRAY_SIZE(set->sig); i++) { |
| set->sig[i] = -1; |
| } |
| |
| return 0; |
| } |
| |
| int sigaddset(sigset_t *set, int signo) |
| { |
| if (!signo_valid(signo)) { |
| errno = EINVAL; |
| return -1; |
| } |
| |
| WRITE_BIT(set->sig[SIGNO_WORD_IDX(signo)], SIGNO_WORD_BIT(signo), 1); |
| |
| return 0; |
| } |
| |
| int sigdelset(sigset_t *set, int signo) |
| { |
| if (!signo_valid(signo)) { |
| errno = EINVAL; |
| return -1; |
| } |
| |
| WRITE_BIT(set->sig[SIGNO_WORD_IDX(signo)], SIGNO_WORD_BIT(signo), 0); |
| |
| return 0; |
| } |
| |
| int sigismember(const sigset_t *set, int signo) |
| { |
| if (!signo_valid(signo)) { |
| errno = EINVAL; |
| return -1; |
| } |
| |
| return 1 & (set->sig[SIGNO_WORD_IDX(signo)] >> SIGNO_WORD_BIT(signo)); |
| } |
| |
| char *strsignal(int signum) |
| { |
| /* Using -INT_MAX here because compiler resolves INT_MIN to (-2147483647 - 1) */ |
| static char buf[sizeof("RT signal -" STRINGIFY(INT_MAX))]; |
| |
| if (!signo_valid(signum)) { |
| errno = EINVAL; |
| return "Invalid signal"; |
| } |
| |
| if (signo_is_rt(signum)) { |
| snprintf(buf, sizeof(buf), "RT signal %d", signum - SIGRTMIN); |
| return buf; |
| } |
| |
| if (IS_ENABLED(CONFIG_POSIX_SIGNAL_STRING_DESC)) { |
| if (strsignal_list[signum] != NULL) { |
| return (char *)strsignal_list[signum]; |
| } |
| } |
| |
| snprintf(buf, sizeof(buf), "Signal %d", signum); |
| |
| return buf; |
| } |