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mirror of https://github.com/vlang/v.git synced 2023-08-10 21:13:21 +03:00
v/vlib/os
2023-02-21 12:30:35 +02:00
..
bare
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filelock vfmt: change all '$expr' to '${expr}' (#16428) 2022-11-15 16:53:13 +03:00
font vfmt: change all '$expr' to '${expr}' (#16428) 2022-11-15 16:53:13 +03:00
notify checker: disallow enum initalization (#17361) 2023-02-19 22:22:07 +01:00
args.v
const_nix.c.v os: reduce heap allocations done by os.real_path, os.executable, os.getwd 2022-08-17 17:06:38 +03:00
const_windows.c.v checker: check int overflow for const vars (#16332) 2022-11-06 08:22:28 +03:00
const.v
debugger_darwin.c.v ci: fix bootstrapping on macos/freebsd etc 2023-02-21 12:30:35 +02:00
debugger_default.c.v os: move pub fn debugger_present() bool{ to platform-specific files (better ptrace portability handling) (#17373) 2023-02-21 10:55:03 +02:00
debugger_freebsd.c.v ci: fix bootstrapping on macos/freebsd etc 2023-02-21 12:30:35 +02:00
debugger_linux.c.v ci: fix bootstrapping on macos/freebsd etc 2023-02-21 12:30:35 +02:00
debugger_windows.c.v ci: fix bootstrapping on macos/freebsd etc 2023-02-21 12:30:35 +02:00
dir_expansions_test.v vfmt: change all '$expr' to '${expr}' (#16428) 2022-11-15 16:53:13 +03:00
environment_test.v vfmt: change all '$expr' to '${expr}' (#16428) 2022-11-15 16:53:13 +03:00
environment.c.v vfmt: change all '$expr' to '${expr}' (#16428) 2022-11-15 16:53:13 +03:00
environment.js.v
fd.c.v all: ~500 more byte=>u8 2022-04-15 18:25:45 +03:00
file_test.v os: add test for os.open_append (#16846) 2023-01-03 01:11:35 +02:00
file.c.v all: replace generic <> with [] - part 2 (#16536) 2022-11-26 18:23:26 +02:00
file.js.v all: remove unnecessary IError() casts 2022-10-28 19:08:30 +03:00
filepath_test.v vfmt: change all '$expr' to '${expr}' (#16428) 2022-11-15 16:53:13 +03:00
filepath_windows.v os: correct description of windows_volume function (#14726) 2022-06-09 10:56:58 +03:00
filepath.v os: add os.to_slash and os.from_slash functions (#16055) 2022-10-14 10:22:36 +03:00
find_abs_path_of_executable_test.v vfmt: change all '$expr' to '${expr}' (#16428) 2022-11-15 16:53:13 +03:00
glob_test.v all: change optional to result of io (#16075) 2022-10-16 09:28:57 +03:00
inode_test.v vfmt: change all '$expr' to '${expr}' (#16428) 2022-11-15 16:53:13 +03:00
inode.c.v os: make os.FileMode public (#16923) 2023-01-09 22:34:36 +02:00
open_uri_default.c.v vfmt: change all '$expr' to '${expr}' (#16428) 2022-11-15 16:53:13 +03:00
open_uri_windows.c.v vfmt: change all '$expr' to '${expr}' (#16428) 2022-11-15 16:53:13 +03:00
os_android_outside_termux.c.v vfmt: change all '$expr' to '${expr}' (#16428) 2022-11-15 16:53:13 +03:00
os_darwin.c.v
os_js.js.v os: rework mv so it works with different partitions (add fallback to os.mv_by_cp + tests) (#17065) 2023-01-22 19:02:04 +02:00
os_linux.c.v
os_nix.c.v os: move pub fn debugger_present() bool{ to platform-specific files (better ptrace portability handling) (#17373) 2023-02-21 10:55:03 +02:00
os_structs_dirent_default.c.v
os_structs_sigaction_default.c.v
os_structs_stat_default.c.v checker: improve pub struct check (fix #14446) (#14777) 2022-06-19 17:42:22 +03:00
os_structs_stat_linux.c.v checker: improve pub struct check (fix #14446) (#14777) 2022-06-19 17:42:22 +03:00
os_structs_utsname_default.c.v
os_test.v os: rework mv so it works with different partitions (add fallback to os.mv_by_cp + tests) (#17065) 2023-01-22 19:02:04 +02:00
os_windows.c.v os: move pub fn debugger_present() bool{ to platform-specific files (better ptrace portability handling) (#17373) 2023-02-21 10:55:03 +02:00
os.c.v os: rework mv so it works with different partitions (add fallback to os.mv_by_cp + tests) (#17065) 2023-01-22 19:02:04 +02:00
os.js.v os: cleanup APIs returning !bool to either return ! or bool (#16111) 2022-10-20 13:56:06 +03:00
os.v os: fix default result of os.temp_dir() for termux (#17237) 2023-02-07 00:07:35 +02:00
password_nix.c.v os,term: fix C.tcsetattr declaration (add missing int return type) 2023-02-13 15:16:23 +02:00
password_windows.c.v os: add input_password(prompt) and unit tests (#15507) 2022-08-23 18:17:38 +03:00
process_nix.c.v all: fix dependant->dependent typos, cleanup comments 2022-12-02 12:51:10 +02:00
process_test.v vfmt: change all '$expr' to '${expr}' (#16428) 2022-11-15 16:53:13 +03:00
process_windows.c.v checker: require unsafe for Struct(voidptr) casts 2023-01-06 09:28:11 +03:00
process.c.v vfmt: change all '$expr' to '${expr}' (#16428) 2022-11-15 16:53:13 +03:00
process.js.v vfmt: change all '$expr' to '${expr}' (#16428) 2022-11-15 16:53:13 +03:00
process.v vfmt: change all '$expr' to '${expr}' (#16428) 2022-11-15 16:53:13 +03:00
README.md docs: fix typos using codespell (#17332) 2023-02-16 11:43:39 +02:00
signal_test.v builtin: show non zero codes on bubbled error_with_code(msg,code) errors 2022-08-16 18:59:38 +03:00
signal.c.v all: change optional to result of io (#16075) 2022-10-16 09:28:57 +03:00
signal.js.v vfmt: change all '$expr' to '${expr}' (#16428) 2022-11-15 16:53:13 +03:00
signal.v all: replace "NB:" with "Note:" (docs/comments) 2022-03-06 20:01:22 +03:00

Description:

os provides common OS/platform independent functions for accessing command line arguments, reading/writing files, listing folders, handling processes etc.


A few os module functions can lead to the TOCTOU vulnerability if used incorrectly. TOCTOU (Time-of-Check-to-Time-of-Use problem) can occur when a file, folder or similar is checked for certain specifications (e.g. read, write permissions) and a change is made afterwards. In the time between the initial check and the edit, an attacker can then cause damage. The following example shows an attack strategy on the left and an improved variant on the right so that TOCTOU is no longer possible.

Example Hint: os.create() opens a file in write-only mode

Possibility for TOCTOU attack
if os.is_writable("file"){

    // >> time to make a quick attack (e.g. symlink /etc/passwd to >file<) <<

    mut f := os.create('path/to/file') ?
        // <do something with file>
    f.close()
}
TOCTOU not possible
mut f := os.create('path/to/file') or {
    println("file not writable")
}

// >> do something with file; file is locked <<

f.close()

Proven affected functions
The following functions should be used with care and only when used correctly.

  • os.is_readable()
  • os.is_writable()
  • os.is_executable()
  • os.is_link()