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Kernel: Added the ability to set the hostname via new syscall

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Userland/hostname: Now takes parameter to set the hostname
LibC/unistd: Added sethostname function
This commit is contained in:
Luke Payne 2020-04-26 15:59:47 +10:00 • committed by Andreas Kling
parent 03f68a51af
commit f191b84b50
7 changed files with 40 additions and 9 deletions
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12
Kernel/Process.cpp
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@ -712,6 +712,18 @@ int Process::sys$gethostname(char* buffer, ssize_t size)
return 0;
}
int Process::sys$sethostname(const char* hostname, ssize_t length)
{
REQUIRE_PROMISE(stdio);
if (length < 0)
return -EINVAL;
LOCKER(*s_hostname_lock, Lock::Mode::Shared);
if (length > 64)
return -ENAMETOOLONG;
*s_hostname = validate_and_copy_string_from_user(hostname, length);
return 0;
}
pid_t Process::sys$fork(RegisterState& regs)
{
REQUIRE_PROMISE(proc);

1
Kernel/Process.h
View file

@ -223,6 +223,7 @@ public:
int sys$clock_settime(clockid_t, timespec*);
int sys$clock_nanosleep(const Syscall::SC_clock_nanosleep_params*);
int sys$gethostname(char*, ssize_t);
int sys$sethostname(const char*, ssize_t);
int sys$uname(utsname*);
int sys$readlink(const Syscall::SC_readlink_params*);
int sys$ttyname_r(int fd, char*, ssize_t);

1
Kernel/Syscall.h
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@ -63,6 +63,7 @@ namespace Kernel {
__ENUMERATE_SYSCALL(getcwd) \
__ENUMERATE_SYSCALL(gettimeofday) \
__ENUMERATE_SYSCALL(gethostname) \
__ENUMERATE_SYSCALL(sethostname) \
__ENUMERATE_SYSCALL(chdir) \
__ENUMERATE_SYSCALL(uname) \
__ENUMERATE_SYSCALL(set_mmap_name) \