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LibSystem: Add wrapper for fstat()

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This commit is contained in:
Andreas Kling 2021-11-23 10:48:22 +01:00
parent 2828d58a10
commit acc2eccede
2 changed files with 17 additions and 8 deletions
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17
Userland/Libraries/LibSystem/Wrappers.cpp
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@ -7,11 +7,11 @@
#include <LibSystem/Wrappers.h>
#include <LibSystem/syscall.h>
#define HANDLE_SYSCALL_RETURN_VALUE(syscall_name, rc) \
#define HANDLE_SYSCALL_RETURN_VALUE(syscall_name, rc, success_value) \
if ((rc) < 0) { \
return Error::from_syscall(syscall_name, rc); \
} \
return {};
return success_value;
namespace System {
@ -22,7 +22,7 @@ ErrorOr<void> pledge(StringView promises, StringView execpromises)
{ execpromises.characters_without_null_termination(), execpromises.length() },
};
int rc = syscall(SC_pledge, &params);
HANDLE_SYSCALL_RETURN_VALUE("pledge"sv, rc);
HANDLE_SYSCALL_RETURN_VALUE("pledge"sv, rc, {});
}
ErrorOr<void> unveil(StringView path, StringView permissions)
@ -32,13 +32,20 @@ ErrorOr<void> unveil(StringView path, StringView permissions)
{ permissions.characters_without_null_termination(), permissions.length() },
};
int rc = syscall(SC_unveil, &params);
HANDLE_SYSCALL_RETURN_VALUE("unveil"sv, rc);
HANDLE_SYSCALL_RETURN_VALUE("unveil"sv, rc, {});
}
ErrorOr<void> sigaction(int signal, struct sigaction const* action, struct sigaction* old_action)
{
int rc = syscall(SC_sigaction, signal, action, old_action);
HANDLE_SYSCALL_RETURN_VALUE("sigaction"sv, rc);
HANDLE_SYSCALL_RETURN_VALUE("sigaction"sv, rc, {});
}
ErrorOr<struct stat> fstat(int fd)
{
struct stat st;
int rc = syscall(SC_fstat, fd, &st);
HANDLE_SYSCALL_RETURN_VALUE("fstat"sv, rc, st);
}
}

2
Userland/Libraries/LibSystem/Wrappers.h
View file

@ -8,11 +8,13 @@
#include <AK/Error.h>
#include <signal.h>
#include <sys/stat.h>
namespace System {
ErrorOr<void> pledge(StringView promises, StringView execpromises);
ErrorOr<void> unveil(StringView path, StringView permissions);
ErrorOr<void> sigaction(int signal, struct sigaction const* action, struct sigaction* old_action);
ErrorOr<struct stat> fstat(int fd);
}