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Implement linux_openat syscall

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This commit is contained in:
EnderIce2 2024-03-20 17:39:31 +02:00
parent a05f88091c
commit 665b26f754
Signed by untrusted user who does not match committer: enderice2
GPG Key ID: EACC3AD603BAB4DD
1 changed files with 35 additions and 2 deletions
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37
syscalls/linux.cpp
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@ -1907,6 +1907,39 @@ static int linux_tgkill(SysFrm *sf, pid_t tgid, pid_t tid, int sig)
return target->Parent->Signals->SendSignal(sig);
}
/* https://man7.org/linux/man-pages/man2/open.2.html */
static int linux_openat(SysFrm *, int dirfd, const char *pathname, int flags, mode_t mode)
{
PCB *pcb = thisProcess;
vfs::FileDescriptorTable *fdt = pcb->FileDescriptors;
Memory::VirtualMemoryArea *vma = pcb->vma;
const char *pPathname = vma->UserCheckAndGetAddress(pathname);
if (pPathname == nullptr)
return -EFAULT;
debug("dirfd=%d pathname=%s flags=%#x mode=%#x",
dirfd, pPathname, flags, mode);
if (dirfd == AT_FDCWD)
{
vfs::RefNode *absoluteNode = fs->Open(pPathname, pcb->CurrentWorkingDirectory);
if (!absoluteNode)
return -ENOENT;
const char *absPath = new char[strlen(absoluteNode->node->FullPath) + 1];
strcpy((char *)absPath, absoluteNode->node->FullPath);
delete absoluteNode;
return fdt->_open(absPath, flags, mode);
}
if (!fs->PathIsRelative(pPathname))
return fdt->_open(pPathname, flags, mode);
fixme("dirfd=%d is stub", dirfd);
return -ENOSYS;
}
/* Undocumented? */
static long linux_newfstatat(SysFrm *, int dfd, const char *filename,
struct stat *statbuf, int flag)
@ -2322,7 +2355,7 @@ static SyscallData LinuxSyscallsTableAMD64[] = {
[__NR_amd64_inotify_add_watch] = {"inotify_add_watch", (void *)nullptr},
[__NR_amd64_inotify_rm_watch] = {"inotify_rm_watch", (void *)nullptr},
[__NR_amd64_migrate_pages] = {"migrate_pages", (void *)nullptr},
[__NR_amd64_openat] = {"openat", (void *)nullptr},
[__NR_amd64_openat] = {"openat", (void *)linux_openat},
[__NR_amd64_mkdirat] = {"mkdirat", (void *)nullptr},
[__NR_amd64_mknodat] = {"mknodat", (void *)nullptr},
[__NR_amd64_fchownat] = {"fchownat", (void *)nullptr},
@ -2810,7 +2843,7 @@ static SyscallData LinuxSyscallsTableI386[] = {
[__NR_i386_inotify_add_watch] = {"inotify_add_watch", (void *)nullptr},
[__NR_i386_inotify_rm_watch] = {"inotify_rm_watch", (void *)nullptr},
[__NR_i386_migrate_pages] = {"migrate_pages", (void *)nullptr},
[__NR_i386_openat] = {"openat", (void *)nullptr},
[__NR_i386_openat] = {"openat", (void *)linux_openat},
[__NR_i386_mkdirat] = {"mkdirat", (void *)nullptr},
[__NR_i386_mknodat] = {"mknodat", (void *)nullptr},
[__NR_i386_fchownat] = {"fchownat", (void *)nullptr},