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LibC: Implement some missing signal.h functions

This commit is contained in:
Bananymous 2025-01-28 17:19:21 +02:00
parent 5938cc4086
commit 21d3cf91a0
1 changed files with 71 additions and 0 deletions
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71
userspace/libraries/LibC/signal.cpp
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@ -1,4 +1,5 @@
#include <BAN/Assert.h>
#include <errno.h>
#include <signal.h>
#include <string.h>
#include <sys/syscall.h>
@ -6,11 +7,29 @@
static_assert(sizeof(sigset_t) * 8 >= _SIGMAX);
static int validate_signal(int sig)
{
if (_SIGMIN <= sig && sig <= _SIGMAX)
return 0;
errno = EINVAL;
return -1;
}
int kill(pid_t pid, int sig)
{
return syscall(SYS_KILL, pid, sig);
}
int killpg(pid_t pgrp, int sig)
{
if (pgrp <= 1)
{
errno = EINVAL;
return -1;
}
return kill(-pgrp, sig);
}
void psignal(int signum, const char* message)
{
if (message && *message)
@ -37,10 +56,20 @@ int sigaction(int sig, const struct sigaction* __restrict act, struct sigaction*
int sigaddset(sigset_t* set, int signo)
{
if (validate_signal(signo) == -1)
return -1;
*set |= 1ull << signo;
return 0;
}
int sigdelset(sigset_t* set, int signo)
{
if (validate_signal(signo) == -1)
return -1;
*set &= ~(1ull << signo);
return 0;
}
int sigemptyset(sigset_t* set)
{
*set = 0;
@ -53,8 +82,40 @@ int sigfillset(sigset_t* set)
return 0;
}
int sighold(int sig)
{
if (validate_signal(sig) == -1)
return -1;
sigset_t set;
(void)sigemptyset(&set);
(void)sigaddset(&set, sig);
return sigprocmask(SIG_BLOCK, &set, nullptr);
}
int sigignore(int sig)
{
if (signal(sig, SIG_IGN) == SIG_ERR)
return -1;
return 0;
}
int siginterrupt(int sig, int flag)
{
if (validate_signal(sig) == -1)
return -1;
struct sigaction act;
(void)sigaction(sig, nullptr, &act);
if (flag)
act.sa_flags &= ~SA_RESTART;
else
act.sa_flags |= SA_RESTART;
return sigaction(sig, &act, nullptr);
}
int sigismember(const sigset_t* set, int signo)
{
if (validate_signal(signo) == -1)
return -1;
return (*set >> signo) & 1;
}
@ -79,3 +140,13 @@ int sigprocmask(int how, const sigset_t* __restrict set, sigset_t* __restrict os
{
return pthread_sigmask(how, set, oset);
}
int sigrelse(int sig)
{
if (validate_signal(sig) == -1)
return -1;
sigset_t set;
(void)sigemptyset(&set);
(void)sigaddset(&set, sig);
return sigprocmask(SIG_UNBLOCK, &set, nullptr);
}