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bsd-user: Implement getdents related syscalls
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>
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@ -279,4 +279,76 @@ static inline abi_long do_freebsd_getfsstat(abi_ulong target_addr,
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return ret;
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}
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/* getdents(2) */
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static inline abi_long do_freebsd11_getdents(abi_long arg1,
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abi_ulong arg2, abi_long nbytes)
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{
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abi_long ret;
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struct freebsd11_dirent *dirp;
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dirp = lock_user(VERIFY_WRITE, arg2, nbytes, 0);
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if (dirp == NULL) {
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return -TARGET_EFAULT;
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}
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ret = get_errno(freebsd11_getdents(arg1, (char *)dirp, nbytes));
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if (!is_error(ret)) {
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struct freebsd11_dirent *de;
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int len = ret;
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int reclen;
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de = dirp;
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while (len > 0) {
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reclen = de->d_reclen;
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if (reclen > len) {
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return -TARGET_EFAULT;
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}
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de->d_reclen = tswap16(reclen);
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de->d_fileno = tswap32(de->d_fileno);
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len -= reclen;
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}
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}
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return ret;
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}
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/* getdirecentries(2) */
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static inline abi_long do_freebsd_getdirentries(abi_long arg1,
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abi_ulong arg2, abi_long nbytes, abi_ulong arg4)
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{
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abi_long ret;
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struct dirent *dirp;
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long basep;
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dirp = lock_user(VERIFY_WRITE, arg2, nbytes, 0);
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if (dirp == NULL) {
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return -TARGET_EFAULT;
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}
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ret = get_errno(getdirentries(arg1, (char *)dirp, nbytes, &basep));
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if (!is_error(ret)) {
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struct dirent *de;
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int len = ret;
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int reclen;
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de = dirp;
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while (len > 0) {
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reclen = de->d_reclen;
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if (reclen > len) {
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return -TARGET_EFAULT;
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}
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de->d_fileno = tswap64(de->d_fileno);
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de->d_off = tswap64(de->d_off);
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de->d_reclen = tswap16(de->d_reclen);
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de->d_namlen = tswap16(de->d_namlen);
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len -= reclen;
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de = (struct dirent *)((void *)de + reclen);
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}
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}
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unlock_user(dirp, arg2, ret);
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if (arg4) {
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if (put_user(basep, arg4, abi_ulong)) {
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return -TARGET_EFAULT;
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}
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}
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return ret;
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}
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#endif /* BSD_USER_FREEBSD_OS_STAT_H */
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