66 lines
1.7 KiB
C
66 lines
1.7 KiB
C
#include <zinnia/spin.h>
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#include <zinnia/string.h>
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#include <zinnia/syscall.h>
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#include <zinnia/usercopy.h>
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#include <config.h>
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#include <uapi/utsname.h>
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static struct spinlock uname_lock = {};
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static struct __utsname uname_buf = {
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.sysname = "Zinnia",
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.release = ZINNIA_VERSION,
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.version = CONFIG_KERNEL_FLAVOR,
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.nodename = "localhost",
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.machine = ZINNIA_ARCH,
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.domainname = "(none)",
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};
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struct syscall_ret sys_setuname(const __user struct __utsname* ptr) {
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struct syscall_ret ret = {};
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if (!ptr) {
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ret.error = EINVAL;
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return ret;
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}
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// TODO: User has to be root to do this.
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struct __utsname read_buf;
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if (!usercopy_read(&read_buf, ptr, sizeof(read_buf))) {
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ret.error = EFAULT;
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return ret;
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}
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spin_lock(&uname_lock);
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strncpy(uname_buf.sysname, read_buf.sysname, sizeof(uname_buf.sysname) - 1);
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strncpy(uname_buf.release, read_buf.release, sizeof(uname_buf.release) - 1);
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strncpy(uname_buf.version, read_buf.version, sizeof(uname_buf.version) - 1);
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strncpy(uname_buf.nodename, read_buf.nodename, sizeof(uname_buf.nodename) - 1);
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strncpy(uname_buf.machine, read_buf.machine, sizeof(uname_buf.machine) - 1);
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strncpy(uname_buf.domainname, read_buf.domainname, sizeof(uname_buf.domainname) - 1);
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spin_unlock(&uname_lock);
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return ret;
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}
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struct syscall_ret sys_getuname(__user struct __utsname* ptr) {
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struct syscall_ret ret = {};
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if (!ptr) {
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ret.error = EINVAL;
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return ret;
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}
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spin_lock(&uname_lock);
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struct __utsname write_buf = uname_buf;
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spin_unlock(&uname_lock);
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if (!usercopy_write(ptr, &write_buf, sizeof(write_buf)))
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ret.error = EFAULT;
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return ret;
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}
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