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|
use libc::{self};
use std::ffi::CString;
use std::{fs, fmt};
#[derive(Debug)]
pub struct FstabEntry {
pub source: String,
pub mountpoint: String,
pub fstype: String,
pub options: String,
pub dump: u32,
pub pass: u32,
}
impl fmt::Display for FstabEntry {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
write!(
f,
"{} {} {} {} {} {}",
self.source, self.mountpoint, self.fstype, self.options, self.dump, self.pass
)
}
}
impl FstabEntry {
fn parse_line(line: &str) -> Result<Self, Box<dyn std::error::Error>> {
let line = line.trim();
if line.is_empty() || line.starts_with('#') {
return Err("Empty line or comment".into());
}
let parts: Vec<&str> = line.split_whitespace().collect();
if parts.len() != 6 {
return Err(format!("Invalid number of fields in fstab entry: {}", line).into());
}
let source = parts[0].to_string();
let mountpoint = parts[1].to_string();
let fstype = parts[2].to_string();
let options = parts[3].to_string();
let dump = parts[4].parse::<u32>().map_err(|e| {
format!("Failed to parse dump field '{}': {}", parts[4], e)
})?;
let pass = parts[5].parse::<u32>().map_err(|e| {
format!("Failed to parse pass field '{}': {}", parts[5], e)
})?;
Ok(FstabEntry {
source,
mountpoint,
fstype,
options,
dump,
pass,
})
}
pub fn parse_fstab(path: &str) -> Result<Vec<FstabEntry>, Box<dyn std::error::Error>> {
let content = fs::read_to_string(path)?;
let mut entries = Vec::new();
for line in content.lines() {
match Self::parse_line(line) {
Ok(entry) => entries.push(entry),
Err(_) => {
println!("\x1b[32m * \x1b[0m Warning: Skipping invalid fstab line: {}", line);
continue;
}
}
}
Ok(entries)
}
pub fn parse_mount_options(
&self,
) -> Result<(libc::c_ulong, Option<String>), Box<dyn std::error::Error>> {
let mut flags = 0;
let mut data_parts = Vec::new();
let options = &self.options;
for opt in options.split(',') {
match opt {
"defaults" => { /* handled by not setting any restrictive flags */ }
"ro" => flags |= libc::MS_RDONLY,
"rw" => flags &= !libc::MS_RDONLY,
"noexec" => flags |= libc::MS_NOEXEC,
"nosuid" => flags |= libc::MS_NOSUID,
"nodev" => flags |= libc::MS_NODEV,
"sync" => flags |= libc::MS_SYNCHRONOUS,
"dirsync" => flags |= libc::MS_DIRSYNC,
"bind" => flags |= libc::MS_BIND,
"rbind" => flags |= libc::MS_BIND | libc::MS_REC,
"remount" => flags |= libc::MS_REMOUNT,
_ => {
if !opt.is_empty() {
data_parts.push(opt);
}
}
}
}
let data = if data_parts.is_empty() {
None
} else {
Some(data_parts.join(","))
};
Ok((flags, data))
}
pub fn mount(&self) -> Result<(), Box<dyn std::error::Error>> {
println!("\x1b[32m * \x1b[0m Started mounting {} from {}", self.mountpoint, self.source);
if self.fstype == "swap" {
println!("\x1b[30m * \x1b[0m Skipping swap: {}", self.source);
return Ok(());
}
if self.mountpoint == "none" {
return Ok(());
}
if self.options.contains("noauto") {
return Ok(());
}
let (flags, data) = self.parse_mount_options()?;
let source_c = CString::new(&*self.source)?;
let target_c = CString::new(&*self.mountpoint)?;
let fstype_c = CString::new(&*self.fstype)?;
let data_c = data.map(|s| CString::new(s).expect("\x1b[31m * \x1b[0m Something went wrong while mounting partitions. You are going to rescue mode..."));
let data_ptr = data_c
.as_ref()
.map_or(std::ptr::null(), |s| s.as_ptr() as *const libc::c_void);
let ret = unsafe {
libc::syscall(
libc::SYS_mount,
source_c.as_ptr(),
target_c.as_ptr(),
fstype_c.as_ptr(),
flags,
data_ptr,
)
};
if ret != 0 {
eprintln!(
"\x1b[31m * \x1b[0m Failed to mount {}: {}",
self.mountpoint,
std::io::Error::last_os_error()
);
} else {
println!("\x1b[32m * \x1b[0m Mounted {}", self.mountpoint);
}
Ok(())
}
}
|
