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2021-05-10Tighten up echo help text.Rob Landley
2021-05-06Fix nohang wait.Rob Landley
2021-05-02More job control plumbing.Rob Landley
2021-05-02Add OpenBSD supportElla-0
2021-05-01telnet: just use dprintf() for IAC sequences.Elliott Hughes
I don't see the need for the separate buffer, and just using dprintf() directly is less code. The only downside really is having to get the right number of `%c`s in your format string.
2021-04-30Make && and || work on function calls.Rob Landley
2021-04-28Toysh don't free function arguments before function returns.Rob Landley
2021-04-27Make toysh function return properly and run next statement.Rob Landley
2021-04-27Make toysh actually run a shell function.Rob Landley
2021-04-27Use cheaper test that works with "toybox" name as a prefix.Rob Landley
2021-04-27More line buffering.Elliott Hughes
This patch does two things: 1. Enable line buffering for echo and yes. I found this through test flakiness from the toybox xargs tests running in CI on devices where "echo" is provided by toybox. For `echo y`, GNU echo does one write of "y\n" but toybox echo was doing two writes, which makes it more likely (4% on the heavily-loaded CI machines) for writes from the two processes to be interleaved. 2. Fix line buffering on glibc if you're calling `toybox foo` rather than `foo`. Otherwise we come through once and switch to unbuffered mode, then again and switch to line buffered mode --- which doesn't seem to actually work in glibc unless you specify a buffer (so passing toybuf and sizeof(toybuf) works, but NULL and 0 doesn't). I hit the second issue trying to reproduce the first issue on the desktop rather than on Android. (If you're scratching your head wondering "why yes(1) too, not just echo(1)?", that represents a blind alley I went down when I mistook which tool was in use. It seemed like the same principle should apply, and it matches what other implementations do.)
2021-04-27Don't send reverse DNS lookups out into the world for something that'sRob Landley
mostly only safe to use behind a firewall or through a VPN these days.
2021-04-26More toysh function work.Rob Landley
Of course "x() { echo hello; } | tr e f; x" allows the pipe but not the call. Ok, take out the union so you can && after a function declaration.
2021-04-26Bugfix: sed s command couldn't skip initial match.Rob Landley
2021-04-25First pass at toysh function() definition plumbing.Rob Landley
2021-04-24telnet: various fixes.Elliott Hughes
This got a bit out of hand. All I wanted to fix was the CR conversion to get this part of https://tools.ietf.org/html/rfc854 right: Therefore, the sequence "CR LF" must be treated as a single "new line" character and used whenever their combined action is intended; the sequence "CR NUL" must be used where a carriage return alone is actually desired; and the CR character must be avoided in other contexts. This rule gives assurance to systems which must decide whether to perform a "new line" function or a multiple-backspace that the TELNET stream contains a character following a CR that will allow a rational decision. But to understand the code well enough to do that, and to fix it so that it works when IAC or CR sequences are split across multiple reads, I ended up rewriting a lot: * Add punctuation in help. * Remove duplicated #include. * Remove some unnecessary globals, enlarge the global buffers, and keep state for correct IAC sequence processing across reads. * Reduce code duplication and rewrite bits that made no sense. * Handle entering/exiting raw mode more uniformly. * Fix the prompt (the character count was wrong). * Allow ^]^D (like BSD telnet) as well as ^]e to exit, and look less like we crashed when doing so. * Simplify the IAC sequence handling, but more importantly work correctly when a sequence is split across multiple reads. * Use more of the existing "x" functions from lib. (And remove code that was duplicating what the "x" functions they'd just called had already done.) * Show "Connected to". * Better signal handling. I'm still not happy with TELOPT_ECHO and TELOPT_SGA in handle_wwdd(), but don't (yet) understand them well enough to simplify them further. On the bright side, I think TELOPT_NAWS is a lot clearer now. It also occurs to me now I'm looking at the diff that although the IAC output code is now better than it was, it probably still isn't pulling its weight and might better be replaced by printf(). ...but this patch has already gotten way out of hand!
2021-04-24telnetd: handle TIME_WAIT better.Elliott Hughes
After a network outage, a long-running telnetd was spinning trying to read from a socket that was in TIME_WAIT. It's easy to reproduce this by using the regular telnet client and typing ^]^D to exit abruptly. I don't think these sockets should ever have been non-blocking, and we want to give up on the client if we hit EOF. All of this needs rewriting to be less complicated (and not use select(2)), but this seems to be a minimal fix for the spin without harming normal usage (where by "usage" I mean "testing the telnet client").
2021-04-24telnetd: pass `-h hostname` to login(1).Elliott Hughes
Handling utmp is login's job: telnetd should just pass the appropriate option to login. (I was investigating a different bug that caused telnetd to take 100% CPU after a network outage and noticed an unexpected utmp fd. It turned out to not be relevant to my actual problem, but it did remind me that this utmp code isn't right in small details like that, but also in the bigger picture: it's writing the wrong information, and only on logout, not login. But rather than try to fix it, let's just let login do its job.)
2021-04-23cpio: Don't lchown() if -t is specifiedYi-Yo Chiang via Toybox
When using -t to inspect an archive, cpio would try to set the owner of any symlink in the archive, even though the symlink wasn't created by the command previously. This would lead to two results, either the command fails with a "No such file or directory" message when trying to lchown() the symlink path, or an existing file, with the name of the symlink, is lchown()-ed. Guard the lchown() function call with a "if (!FLAG(t))" block, and add regression test for this.
2021-04-20Test doesn't need the < /dev/null and input being a pipe doesn't makeRob Landley
legacy cpio think it's reading from 1970's era reel-to-reel magnetic tape.
2021-04-20hexedit: various improvements.Elliott Hughes
I've been using hexedit quite a lot, mainly for _corrupting_ files, and have been meaning to send this collection of changes for far too long now. I saw a bug requesting editing in the ASCII pane (which this patch _doesn't_ add), and wanted to get this sent in before it has to undergo the third massive merge conflict of its existence... The main "TODO" in this is that I never got round to implementing searching for an arbitrary byte sequence. It seems like we ought to have that feature, but personally I'm far more likely to jump to an offset or to search for some ASCII. I haven't needed to search for arbitrary byte sequences in all this time, so I'll fix this if/when I actually need it... * Enter (new) read-only mode rather than refusing to open read-only files. * More keys: page up/page down, home/end, and ctrl-home/ctrl-end for beginning/end of file. * Jump with ^J (or vi-like :). Enter absolute address or +12 or -40 for relative jumps. * Find with ^F (or vi-like /). No support for bytes, but useful for finding text. (^G or n for next match, ^D or p for previous match.) * Support all the usual suspects for "quit": vi-like q, desktop-like ^Q, panic ^C, or even plain old Esc. * The ASCII pane is made more readable by (hopefully) reasonable use of color. Regular control characters are shown in red using the appropriate letter (so a red A is 0x01, etc), printable characters are shown normally, and top-bit set characters are just shown as a purple question mark (since I couldn't come up with a better representation that had any obvious value --- in my experience top-bit set characters are either meaningless in ASCII, part of a UTF-8 sequence in modern files, or in some random code page in ancient files). The choice of red and purple was to deliberately make these not-actually-ASCII characters slide into the background; before this patch they have so many bright pixels (especially with the use of reverse video) that I couldn't clearly see the *actual* ASCII content in the ASCII pane. * Addresses are now shown in yellow. No real justification other than "it looks nice". * NUL bytes in the hex pane are shown dimmed. I find this helpful especially when there's a lot of padding, and it can actually be a useful clue when reverse engineering (you can "see" repeated patterns more easily), but I can understand if this one's controversial. * Errors are shown "vim style" in bold white text on a red background, waiting briefly to ensure they're seen. * The status bar shows the filename, whether the file is opened read-only, the current offset into the file, and the total length of the file. * SIGWINCH handling has been added.
2021-04-20setsid(1): call setsid(2) before setpgrp(2).Elliott Hughes
The new cpio test that uses setsid fails if you're using the toybox setsid. Move the setpgrp() call before the vfork() but after the setsid().
2021-04-17Teach cpio to skip runs of NUL bytes between records.Rob Landley
2021-04-16cpio: continue past TRAILER!!! (like kernel does) but error on empty archive.Rob Landley
2021-04-14Fix $IFS: skip trailing whitespace after first non-whitespace separator.Rob Landley
2021-04-12readelf: Display properly in 80 columns, don't reject .bss off end of file.Rob Landley
2021-04-11toysh: save _resolved_ variable contents in $IFS cache.Rob Landley
2021-04-10Fix more toysh tests.Rob Landley
2021-04-10Fix next couple of sh tests.Rob Landley
Cached $IFS value has to be per function context because local vars.
2021-04-08Fix typo in the xexec tweak.Rob Landley
2021-04-07Add cp -uRob Landley
2021-04-05Any / in string makes it a path, not just absolute path.Rob Landley
Note: toy_exec() does an exact name match so fails given a path anyway, it's just an optimization to avoid the binary search, but special casing absolute path while very cheap isn't _correct_...
2021-04-03Fix the next test.Rob Landley
2021-04-03Add a missing pop_block().Rob Landley
2021-04-01TypoRob Landley
2021-03-31Toysh: adding function logic screwed up pipe/block logic. Fix it.Rob Landley
Remove cached blk/pout/urd and make TT.ff->blk always be populated instead (like TT.ff, list is never empty), have current pipe (and block trailing) redirections live in current TT.ff->blk. Left in a bunch of commented debug printfs and a filehandle dump function.
2021-03-29Fix system calls and get rid of tempfileMichael Christensen
2021-03-27More cleanup of chsh.cRob Landley
2021-03-27chsh cleanup: Reindent and tweak help text.Rob Landley
2021-03-26Create (lsb) chsh commandMichael Christensen
2021-03-24Fix install -tEthan Sommer
2021-03-20Nir Lichtman pointed out that rm -p shouldn't try to rmdir / at the end.Rob Landley
2021-03-19Fix another sh regression.Rob Landley
2021-03-19Fix some more sh regressions.Rob Landley
2021-03-18Fix first few testsuite regressions from function/local plumbing.Rob Landley
2021-03-18telnetd: don't exit if waitpid() returns 0.Elliott Hughes
Noticed while using telnetd to manually test some telnet fixes: telnetd would sometimes exit when I'd disconnect because it couldn't find pid 0 on its list of sessions. I've not seen obscure exits because select() times out, but I've also changed that `return` to an error_exit() so we'll at least know what's happened if that ever occurs. Also use <arpa/telnet.h> rather than manually #define'ing its constants, use the FLAG() macro throughout, and xsetsockopt(). Don't pointlessly set errno to 0 at the start of main and then never look at it again.
2021-03-17init: fix waitforpid().Elliott Hughes
The kill(2) should be checking whether `pid` still exists, not the process that wait(2) just told us has exited.
2021-03-17Tighten up parse_word() a bit and and teach it to read empty ${}Rob Landley
(fixes up some test suite tests).
2021-03-17vi: various fixes.Elliott Hughes
I've been using toybox vi as a makeshift "less" lately. This patch contains all the fixes I've made... $ should go to the last character before the newline, not the newline. Fix ^b and ^f, and ^e and ^y (which was mistakenly ^u before, which is also a movement key, but half of ^d/^u, neither of which we actually implement, and neither of which I've ever used myself --- I might have large hands, but they're not _that_ large). Fix the display of lines longer than 1024 characters. Fix the display of the "~"s after the end of the file, and use VT100 dim to make it a bit more obvious that they're not actually part of the file. Also be a bit more consistent about \033 which is the most common way to write \x1b in toybox. Don't show the status while in ex mode. Make what the status is showing a little less unclear by adding a "C" for the byte offset and file size, and add a percentage (albeit one based on bytes rather than lines). Fix the flickering seen on updates with the usual stupid trick of setting a large buffer. Handle SIGWINCH. Add support for Home/End/PageUp/PageDown. Remove a bit of duplication around calls to draw_page().
2021-03-17Add local variables and basic function() support plumbing.Rob Landley
Not fully wired up yet, probably a bunch of regressions.