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bsd-user: Implement getdents related syscalls

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Implement the following syscalls:
getdents(2)
getdirecentries(2)

Signed-off-by: Stacey Son <sson@FreeBSD.org>
Signed-off-by: Karim Taha <kariem.taha2.7@gmail.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Warner Losh <imp@bsdimp.com>
This commit is contained in:
Stacey Son 2023-08-13 10:41:41 +02:00 committed by Warner Losh
parent 191fe50d5d
commit 213444529d
1 changed files with 72 additions and 0 deletions
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72
bsd-user/freebsd/os-stat.h
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@ -279,4 +279,76 @@ static inline abi_long do_freebsd_getfsstat(abi_ulong target_addr,
return ret;
}
/* getdents(2) */
static inline abi_long do_freebsd11_getdents(abi_long arg1,
abi_ulong arg2, abi_long nbytes)
{
abi_long ret;
struct freebsd11_dirent *dirp;
dirp = lock_user(VERIFY_WRITE, arg2, nbytes, 0);
if (dirp == NULL) {
return -TARGET_EFAULT;
}
ret = get_errno(freebsd11_getdents(arg1, (char *)dirp, nbytes));
if (!is_error(ret)) {
struct freebsd11_dirent *de;
int len = ret;
int reclen;
de = dirp;
while (len > 0) {
reclen = de->d_reclen;
if (reclen > len) {
return -TARGET_EFAULT;
}
de->d_reclen = tswap16(reclen);
de->d_fileno = tswap32(de->d_fileno);
len -= reclen;
}
}
return ret;
}
/* getdirecentries(2) */
static inline abi_long do_freebsd_getdirentries(abi_long arg1,
abi_ulong arg2, abi_long nbytes, abi_ulong arg4)
{
abi_long ret;
struct dirent *dirp;
long basep;
dirp = lock_user(VERIFY_WRITE, arg2, nbytes, 0);
if (dirp == NULL) {
return -TARGET_EFAULT;
}
ret = get_errno(getdirentries(arg1, (char *)dirp, nbytes, &basep));
if (!is_error(ret)) {
struct dirent *de;
int len = ret;
int reclen;
de = dirp;
while (len > 0) {
reclen = de->d_reclen;
if (reclen > len) {
return -TARGET_EFAULT;
}
de->d_fileno = tswap64(de->d_fileno);
de->d_off = tswap64(de->d_off);
de->d_reclen = tswap16(de->d_reclen);
de->d_namlen = tswap16(de->d_namlen);
len -= reclen;
de = (struct dirent *)((void *)de + reclen);
}
}
unlock_user(dirp, arg2, ret);
if (arg4) {
if (put_user(basep, arg4, abi_ulong)) {
return -TARGET_EFAULT;
}
}
return ret;
}
#endif /* BSD_USER_FREEBSD_OS_STAT_H */