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use crate::error::ExitStatus;
use crate::shell_bytes::ShellBytes;
use crate::sys;
/// Full POSIX test/[ implementation with compound expressions.
pub(crate) fn test_eval(args: &[&str]) -> ExitStatus {
if args.is_empty() {
return ExitStatus::FAILURE;
}
let mut pos = 0;
let result = test_or(args, &mut pos);
// If there are unconsumed arguments, it's a syntax error
if pos < args.len() {
eprintln!("test: too many arguments");
return ExitStatus::MISUSE;
}
if result {
ExitStatus::SUCCESS
} else {
ExitStatus::FAILURE
}
}
fn test_or(args: &[&str], pos: &mut usize) -> bool {
let mut result = test_and(args, pos);
while *pos < args.len() && args[*pos] == "-o" {
*pos += 1;
let right = test_and(args, pos);
result = result || right;
}
result
}
fn test_and(args: &[&str], pos: &mut usize) -> bool {
let mut result = test_not(args, pos);
while *pos < args.len() && args[*pos] == "-a" {
*pos += 1;
let right = test_not(args, pos);
result = result && right;
}
result
}
fn test_not(args: &[&str], pos: &mut usize) -> bool {
if *pos < args.len() && args[*pos] == "!" {
*pos += 1;
!test_primary(args, pos)
} else {
test_primary(args, pos)
}
}
fn test_primary(args: &[&str], pos: &mut usize) -> bool {
if *pos >= args.len() {
return false;
}
// Parenthesized expression
if args[*pos] == "(" {
*pos += 1;
let result = test_or(args, pos);
if *pos < args.len() && args[*pos] == ")" {
*pos += 1;
}
return result;
}
// Binary operators (check if next token is binary op)
if *pos + 2 <= args.len() {
let maybe_op = if *pos + 1 < args.len() {
args[*pos + 1]
} else {
""
};
match maybe_op {
"=" | "==" => {
let left = args[*pos];
*pos += 2;
let right = if *pos < args.len() { args[*pos] } else { "" };
*pos += 1;
return left == right;
}
"!=" => {
let left = args[*pos];
*pos += 2;
let right = if *pos < args.len() { args[*pos] } else { "" };
*pos += 1;
return left != right;
}
"<" => {
let left = args[*pos];
*pos += 2;
let right = if *pos < args.len() { args[*pos] } else { "" };
*pos += 1;
return left < right;
}
">" => {
let left = args[*pos];
*pos += 2;
let right = if *pos < args.len() { args[*pos] } else { "" };
*pos += 1;
return left > right;
}
"-eq" | "-ne" | "-lt" | "-le" | "-gt" | "-ge" => {
let left = args[*pos].parse::<i64>().unwrap_or(0);
let op = args[*pos + 1];
*pos += 2;
let right = if *pos < args.len() {
let r = args[*pos].parse::<i64>().unwrap_or(0);
*pos += 1;
r
} else {
*pos += 1;
0
};
return match op {
"-eq" => left == right,
"-ne" => left != right,
"-lt" => left < right,
"-le" => left <= right,
"-gt" => left > right,
"-ge" => left >= right,
_ => false,
};
}
"-nt" | "-ot" | "-ef" => {
// File comparison operators
let left = args[*pos];
*pos += 2;
let right = if *pos < args.len() {
let r = args[*pos];
*pos += 1;
r
} else {
*pos += 1;
""
};
let lm = std::fs::metadata(ShellBytes::from_str_lossless(left).to_path_buf()).ok();
let rm = std::fs::metadata(ShellBytes::from_str_lossless(right).to_path_buf()).ok();
return match maybe_op {
"-nt" => match (lm, rm) {
(Some(l), Some(r)) => l.modified().ok() > r.modified().ok(),
(Some(_), None) => true,
_ => false,
},
"-ot" => match (lm, rm) {
(Some(l), Some(r)) => l.modified().ok() < r.modified().ok(),
(None, Some(_)) => true,
_ => false,
},
"-ef" => {
use std::os::unix::fs::MetadataExt;
match (lm, rm) {
(Some(l), Some(r)) => l.dev() == r.dev() && l.ino() == r.ino(),
_ => false,
}
}
_ => false,
};
}
_ => {}
}
}
// Unary operators — only match if there's a following operand
// (and the operand isn't a closing paren or binary op)
let op = args[*pos];
let has_operand = *pos + 1 < args.len()
&& !matches!(
args[*pos + 1],
")" | "-a" | "-o" | "=" | "!=" | "-eq" | "-ne" | "-lt" | "-le" | "-gt" | "-ge"
);
match op {
"-n" if has_operand => {
*pos += 1;
let s = args[*pos];
*pos += 1;
!s.is_empty()
}
"-z" if has_operand => {
*pos += 1;
let s = if *pos < args.len() {
let r = args[*pos];
*pos += 1;
r
} else {
""
};
s.is_empty()
}
"-e" if has_operand => {
*pos += 1;
let p = if *pos < args.len() {
let r = args[*pos];
*pos += 1;
r
} else {
""
};
ShellBytes::from_str_lossless(p).to_path_buf().exists()
}
"-f" if has_operand => {
*pos += 1;
let p = if *pos < args.len() {
let r = args[*pos];
*pos += 1;
r
} else {
""
};
ShellBytes::from_str_lossless(p).to_path_buf().is_file()
}
"-d" if has_operand => {
*pos += 1;
let p = if *pos < args.len() {
let r = args[*pos];
*pos += 1;
r
} else {
""
};
ShellBytes::from_str_lossless(p).to_path_buf().is_dir()
}
"-L" | "-h" if has_operand => {
*pos += 1;
let p = if *pos < args.len() {
let r = args[*pos];
*pos += 1;
r
} else {
""
};
ShellBytes::from_str_lossless(p)
.to_path_buf()
.symlink_metadata()
.map(|m| m.file_type().is_symlink())
.unwrap_or(false)
}
"-r" | "-w" | "-x" if has_operand => {
*pos += 1;
let p = if *pos < args.len() {
let r = args[*pos];
*pos += 1;
r
} else {
""
};
use std::os::unix::fs::MetadataExt;
let uid = unsafe { sys::getuid() };
match std::fs::metadata(ShellBytes::from_str_lossless(p).to_path_buf()) {
Ok(m) => {
let mode = m.mode();
let is_owner = m.uid() == uid;
match op {
"-r" => {
if is_owner {
mode & 0o400 != 0
} else {
mode & 0o004 != 0
}
}
"-w" => {
if is_owner {
mode & 0o200 != 0
} else {
mode & 0o002 != 0
}
}
"-x" => {
if is_owner {
mode & 0o100 != 0
} else {
mode & 0o001 != 0
}
}
_ => false,
}
}
Err(_) => false,
}
}
"-s" if has_operand => {
*pos += 1;
let p = if *pos < args.len() {
let r = args[*pos];
*pos += 1;
r
} else {
""
};
std::fs::metadata(p).map(|m| m.len() > 0).unwrap_or(false)
}
"-t" if has_operand => {
*pos += 1;
let fd = if *pos < args.len() {
let r = args[*pos];
*pos += 1;
r
} else {
"1"
};
let fd = fd.parse::<i32>().unwrap_or(1);
unsafe { sys::isatty(fd) != 0 }
}
"-p" if has_operand => {
*pos += 1;
let p = if *pos < args.len() {
let r = args[*pos];
*pos += 1;
r
} else {
""
};
use std::os::unix::fs::FileTypeExt;
std::fs::metadata(p)
.map(|m| m.file_type().is_fifo())
.unwrap_or(false)
}
"-b" if has_operand => {
*pos += 1;
let p = if *pos < args.len() {
let r = args[*pos];
*pos += 1;
r
} else {
""
};
use std::os::unix::fs::FileTypeExt;
std::fs::metadata(p)
.map(|m| m.file_type().is_block_device())
.unwrap_or(false)
}
"-c" if has_operand => {
*pos += 1;
let p = if *pos < args.len() {
let r = args[*pos];
*pos += 1;
r
} else {
""
};
use std::os::unix::fs::FileTypeExt;
std::fs::metadata(p)
.map(|m| m.file_type().is_char_device())
.unwrap_or(false)
}
"-S" if has_operand => {
*pos += 1;
let p = if *pos < args.len() {
let r = args[*pos];
*pos += 1;
r
} else {
""
};
use std::os::unix::fs::FileTypeExt;
std::fs::metadata(p)
.map(|m| m.file_type().is_socket())
.unwrap_or(false)
}
"-u" if has_operand => {
*pos += 1;
let p = if *pos < args.len() {
let r = args[*pos];
*pos += 1;
r
} else {
""
};
use std::os::unix::fs::MetadataExt;
std::fs::metadata(p)
.map(|m| m.mode() & 0o4000 != 0)
.unwrap_or(false)
}
"-g" if has_operand => {
*pos += 1;
let p = if *pos < args.len() {
let r = args[*pos];
*pos += 1;
r
} else {
""
};
use std::os::unix::fs::MetadataExt;
std::fs::metadata(p)
.map(|m| m.mode() & 0o2000 != 0)
.unwrap_or(false)
}
"-k" if has_operand => {
*pos += 1;
let p = if *pos < args.len() {
let r = args[*pos];
*pos += 1;
r
} else {
""
};
use std::os::unix::fs::MetadataExt;
std::fs::metadata(p)
.map(|m| m.mode() & 0o1000 != 0)
.unwrap_or(false)
}
_ => {
// Bare string: true if non-empty
*pos += 1;
!op.is_empty()
}
}
}