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Implement linux_getcwd syscall

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This commit is contained in:
EnderIce2 2024-03-20 21:18:37 +02:00
parent 76367669be
commit 4e3f2bc8ab
Signed by untrusted user who does not match committer: enderice2
GPG Key ID: EACC3AD603BAB4DD
1 changed files with 25 additions and 2 deletions
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27
syscalls/linux.cpp
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@ -1379,6 +1379,29 @@ static int linux_creat(SysFrm *, const char *pathname, mode_t mode)
return fdt->_creat(pathname, mode);
}
/* https://man7.org/linux/man-pages/man2/getcwd.2.html */
static int linux_getcwd(SysFrm *, char *buf, size_t size)
{
PCB *pcb = thisProcess;
Memory::VirtualMemoryArea *vma = pcb->vma;
char *pBuf = vma->UserCheckAndGetAddress(buf, size);
if (pBuf == nullptr)
return -EFAULT;
const char *cwd = pcb->CurrentWorkingDirectory->FullPath;
size_t len = strlen(cwd);
if (len >= size)
{
warn("Buffer too small");
return -ERANGE;
}
strncpy(pBuf, cwd, len);
pBuf[len] = '\0';
return len;
}
/* https://man7.org/linux/man-pages/man2/mkdir.2.html */
static int linux_mkdir(SysFrm *, const char *pathname, mode_t mode)
{
@ -2174,7 +2197,7 @@ static SyscallData LinuxSyscallsTableAMD64[] = {
[__NR_amd64_truncate] = {"truncate", (void *)nullptr},
[__NR_amd64_ftruncate] = {"ftruncate", (void *)nullptr},
[__NR_amd64_getdents] = {"getdents", (void *)nullptr},
[__NR_amd64_getcwd] = {"getcwd", (void *)nullptr},
[__NR_amd64_getcwd] = {"getcwd", (void *)linux_getcwd},
[__NR_amd64_chdir] = {"chdir", (void *)nullptr},
[__NR_amd64_fchdir] = {"fchdir", (void *)nullptr},
[__NR_amd64_rename] = {"rename", (void *)nullptr},
@ -2728,7 +2751,7 @@ static SyscallData LinuxSyscallsTableI386[] = {
[__NR_i386_pread64] = {"pread64", (void *)linux_pread64},
[__NR_i386_pwrite64] = {"pwrite64", (void *)linux_pwrite64},
[__NR_i386_chown] = {"chown", (void *)nullptr},
[__NR_i386_getcwd] = {"getcwd", (void *)nullptr},
[__NR_i386_getcwd] = {"getcwd", (void *)linux_getcwd},
[__NR_i386_capget] = {"capget", (void *)nullptr},
[__NR_i386_capset] = {"capset", (void *)nullptr},
[__NR_i386_sigaltstack] = {"sigaltstack", (void *)nullptr},