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* scrollbackLoek Le Blansch2020-07-16
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* ligaturesLoek Le Blansch2020-07-16
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* remove sixel stub codeHiltjo Posthuma2020-06-17
| | | | | Remove stub code that was used for an experiment of adding sixel code to st from the commit f7398434.
* fix unicode glitch in DCS strings, patch by Tim AllenHiltjo Posthuma2020-06-17
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Reported on the mailinglist: " I discovered recently that if an application running inside st tries to send a DCS string, subsequent Unicode characters get messed up. For example, consider the following test-case: printf '\303\277\033P\033\\\303\277' ...where: - \303\277 is the UTF-8 encoding of U+00FF LATIN SMALL LETTER Y WITH DIAERESIS (ÿ). - \033P is ESC P, the token that begins a DCS string. - \033\\ is ESC \, a token that ends a DCS string. - \303\277 is the same ÿ character again. If I run the above command in a VTE-based terminal, or xterm, or QTerminal, or pterm (PuTTY), I get the output: ÿÿ ...which is to say, the empty DCS string is ignored. However, if I run that command inside st (as of commit 9ba7ecf), I get: ÿÿ ...where those last two characters are \303\277 interpreted as ISO8859-1 characters, instead of UTF-8. I spent some time tracing through the state machines in st.c, and so far as I can tell, this is how it works currently: - ESC P sets the "ESC_DCS" and "ESC_STR" flags, indicating that incoming bytes should be collected into the strescseq buffer, rather than being interpreted. - ESC \ sets the "ESC_STR_END" flag (when ESC is received), and then calls strhandle() (when \ is received) to interpret the collected bytes. - If the collected bytes begin with 'P' (i.e. if this was a DCS string) strhandle() sets the "ESC_DCS" flag again, confusing the state machine. If my understanding is correct, fixing the problem should be as easy as removing the line that sets ESC_DCS from strhandle(): diff --git a/st.c b/st.c index ef8abd5..b5b805a 100644 --- a/st.c +++ b/st.c @@ -1897,7 +1897,6 @@ strhandle(void) xsettitle(strescseq.args[0]); return; case 'P': /* DCS -- Device Control String */ - term.mode |= ESC_DCS; case '_': /* APC -- Application Program Command */ case '^': /* PM -- Privacy Message */ return; I've tried the above patch and it fixes my problem, but I don't know if it introduces any others. "
* config.def.h: add an option allowwindowops, by default off (secure)Hiltjo Posthuma2020-05-30
| | | | | | | | | | | | | | | | Similar to the xterm AllowWindowOps option, this is an option to allow or disallow certain (non-interactive) operations that can be insecure or exploited. NOTE: xsettitle() is not guarded by this because st does not support printing the window title. Else this could be exploitable (arbitrary code execution). Similar problems have been found in the past in other terminal emulators. The sequence for base64-encoded clipboard copy is now guarded because it allows a sequence written to the terminal to manipulate the clipboard of the running user non-interactively, for example: printf '\x1b]52;0;ZWNobyBoaQ0=\a'
* tiny style fixHiltjo Posthuma2020-05-30
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* Partially add back in "support REP (repeat) escape sequence"Hiltjo Posthuma2020-05-30
| | | | | | | | | | | | | | Add the functionality back in for xterm compatibility, but do not expose the capability in st.info (yet). Some notes: It was reverted because it caused some issues with ncurses in some configurations, namely when using BSD padding (--enable-bsdpad, BSD_TPUTS) in ncurses it caused issues with repeating digits. A fix has been upstreamed in ncurses since snapshot 20200523. The fix is also backported to OpenBSD -current.
* Revert "support REP (repeat) escape sequence"Hiltjo Posthuma2020-05-16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | This reverts commit e8392b282c2eaa28725241a9612804fb55113da4. There is currently a bug in older ncurses versions (like on OpenBSD) where a fix for a bug with REP is not backported yet. Most likely in tty/tty_update.c: Noticed while using lynx (which uses ncurses/curses). To reproduce using lynx: echo "Z0000000" | lynx -stdin or using the program: int main(void) { WINDOW *win; win = initscr(); printw("Z0000000"); refresh(); sleep(5); return 0; } This prints "ZZZZZZZ" (incorrectly).
* support REP (repeat) escape sequenceAvi Halachmi (:avih)2020-05-16
| | | | | | | | | | | | | | | | The sequence \e[Nb prints the last printed char N (more) times if it's printable, and it's ignored after newline or other control chars. This is Ecma-048/ANSI-X3.6 sequence and not DEC VT. It's supported by xterm, and ncurses uses it when possible, e.g. when TERM is xterm* (and with this commit also st*). xterm supports only codepoints<=255, possibly due to internal limits. We support any value/codepoint which was placed in a cell. To test: - tput rep 65 4 -> prints 'AAAA' - printf "\342\225\246\033[4b" -> prints U+2566 1+4 times.
* Fix selection: selscrollJakub Leszczak2020-05-12
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* Fix selection: ignore ATTR_WRAP when rectangular selection in getselJakub Leszczak2020-05-12
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* Fix selection: selclear in tputcJakub Leszczak2020-05-12
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* code-style: add fallthrough commentHiltjo Posthuma2020-05-09
| | | | Patch by Steve Ward, thanks.
* optimize column width calculation and utf-8 encode for ASCIIHiltjo Posthuma2020-05-09
| | | | | In particular on OpenBSD and on glibc wcwidth() is quite expensive. On musl there is little difference.
* fix for incorrect (partial) written sequences when libc wcwidth() == -1Hiltjo Posthuma2020-05-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix an issue with incorrect (partial) written sequences when libc wcwidth() == -1. The sequence is updated to on wcwidth(u) == -1: c = "\357\277\275" but len isn't. A way to reproduce in practise: * st -o dump.txt * In the terminal: printf '\xcd\xb8' - This is codepoint 888, on OpenBSD it reports wcwidth() == -1. - Quit the terminal. - Look in dump.txt (partial written sequence of "UTF_INVALID"). This was introduced in: " commit 11625c7166b7e4dad414606227acec2de1c36464 Author: czarkoff@gmail.com <czarkoff@gmail.com> Date: Tue Oct 28 12:55:28 2014 +0100 Replace character with U+FFFD if wcwidth() is -1 Helpful when new Unicode codepoints are not recognized by libc." Change: Remove setting the sequence. If this happens to break something, another solution could be setting len = 3 for the sequence.
* tiny code-style and typo-fix in commentHiltjo Posthuma2020-05-09
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* replace exit(3) by _exit(2) in signal handler sigchld()Jan Klemkow2020-04-30
| | | | | exit(3) is not async-signal-safe but, _exit(2) is. This change prevents st to crash and dump core.
* Update XIM cursor position only if changedIvan Tham2020-04-19
| | | | | Updating XIM cursor position is expensive, so only update it when cursor position changed.
* just remove the EOF messageHiltjo Posthuma2020-04-11
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* Fix small typosHiltjo Posthuma2020-04-11
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* Launch scroll program with the default shellQuentin Rameau2020-04-11
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* Fix style issueRoberto E. Vargas Caballero2020-04-11
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* ttyread: test for EOF while reading ttyRoberto E. Vargas Caballero2020-04-11
| | | | | | When a read operation returns 0 then it means that we arrived to the end of the file, and new reads will return 0 unless you do some other operation such as lseek(). This case happens with USB-232 adapters when they are unplugged.
* Add support for scroll(1)Roberto E. Vargas Caballero2020-04-11
| | | | | | | | | Scroll is a program that stores all the lines of its child and be used in st as a way of implementing scrollback. This solution is much better than implementing the scrollback in st itself because having a different program allows to use it in any other program without doing modifications to those programs.
* OSC 52 - copy to clipboard: don't limit to 382 bytesAvi Halachmi (:avih)2019-11-10
| | | | | | | | | | | | | | | | | | Strings which an application sends to the terminal in OSC, DCS, etc are typically small (title, colors, etc) but one exception is OSC 52 which copies text to the clipboard, and is used for instance by tmux. Previously st cropped these strings at 512 bytes, which for OSC 52 limited the copied text to 382 bytes (remaining buffer space before base64). This made it less useful than it can be. Now it's a dynamic growing buffer. It remains allocated after use, resets to 512 when a new string starts, or leaked on exit. Resetting/deallocating the buffer right after use (at strhandle) is possible with some more code, however, it doesn't always end up used, and to cover those cases too will require even more code, so resetting only on new string is good enough for now.
* CSIEscape, STREscape: use size_t for buffer lengthHiltjo Posthuma2019-11-10
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* STREscape: don't trim prematurelyAvi Halachmi (:avih)2019-11-10
| | | | | | | | | | | STRescape holds strings in escape sequences such as OSC and DCS, and its buffer is 512 bytes. If the input is too big then trailing chars are ignored, but the test was off-by-1 such that it took 510 chars instead of 511 (before a terminating NULL is added). Now the full size can be utilized.
* base64dec: don't read out of boundsAvi Halachmi (:avih)2019-11-10
| | | | | | | | | | | | | | | | | | | | | | | | | | Previously, base64dec checked terminating input '\0' every 4 calls to base64dec_getc, where the latter progressed one or more chars on each call, and could read past '\0' in the way it was used. The input to base64dec currently comes only from OSC 52 escape seq (copy to clipboard), and reading past '\0' or even past the buffer boundary was easy to trigger. Also, even if we could trust external input to be valid base64, there are different base64 standards, and not all of them require padding to 4 bytes blocks (using trailing '=' chars). It didn't affect short OSC 52 strings because the buffer is initialized to 0's, so typically it did stop within the buffer, but if the string was trimmed to fit (the buffer is 512 bytes) then it did also read past the end of the buffer, and the decoded suffix ended up arbitrary. This patch makes base64dec_getc not progress past '\0', and instead produce fake trailing padding of '='. Additionally, at base64dec, if padding is detected at the first or second byte of a quartet, then we identify it as invalid and abort (a valid quartet has at least two leading non-padding bytes).
* selection: fix view to match actual selection on first cellAvi Halachmi (:avih)2019-04-14
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* revert part of commit add0211522737b79dad990ccd65c8af63b5cc1ddHiltjo Posthuma2019-03-15
| | | | | | | | | | "use iswspace()/iswpunct() to find word delimiters this inverts the configuration logic: you no longer provide a list of delimiters -- all space and punctuation characters are considered delimiters, unless listed in extrawordchars." Feedback from IRC and personal preference.
* dont print color warning on color reset OSC 104 without parameterHiltjo Posthuma2019-03-15
| | | | | | also print explicitly "(null)" when printf "%s" p=NULL. noticed when exiting mutt: printf '\x1b]104\x07'
* minor code-style, initialize var at the top of functionHiltjo Posthuma2019-03-15
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* use iswspace()/iswpunct() to find word delimitersLauri Tirkkonen2019-03-15
| | | | | | this inverts the configuration logic: you no longer provide a list of delimiters -- all space and punctuation characters are considered delimiters, unless listed in extrawordchars.
* replace utf8strchr with wcschrLauri Tirkkonen2019-03-15
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* be silent about explicitly unhandled mouse modesLauri Tirkkonen2019-03-13
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* style: remove double empty newlinesHiltjo Posthuma2019-03-03
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* better Input Method Editor (IME) supportIvan Tham2019-02-12
| | | | | | | | | | | | Features: - Allow input methods swap with hotkey (E.g. left ctrl + left shift). - Over-the-spot pre-editing style, pre-edit data placed over insertion point. - Restart IME without segmentation fault. TODO: - Automatically pickup IME if st started before IME
* output child WEXITSTATUS/WTERMSIG on abnormal terminationLauri Tirkkonen2018-12-11
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* st: small typofix in commentHiltjo Posthuma2018-11-04
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* small code-style fixHiltjo Posthuma2018-09-11
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* Remove the ISO 14755 featureQuentin Rameau2018-09-11
| | | | | | And move it to the patches section. Keeping it would force to add an exec pledge on OpenBSD, and some people think it's bloated, so bye!
* code-style for pledge(2)Hiltjo Posthuma2018-05-25
| | | | feedback from Klemens, thanks
* Pledge on OpenBSDHiltjo Posthuma2018-05-25
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* error message style and use strerror in a few placesHiltjo Posthuma2018-03-29
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* set sel.alt in selstart instead of selextendDaniel Tameling2018-03-29
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* selextend: clarify: !sel.mode == SEL_IDLEHiltjo Posthuma2018-03-17
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* minor code-style: whitespace fixesHiltjo Posthuma2018-03-16
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* regression: include termios.h for tcsendbreak etcHiltjo Posthuma2018-03-09
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* General cleanupDevin J. Pohly2018-02-25
| | | | | | | Simplifies logic in a couple places and removes a redundant function call. Signed-off-by: Devin J. Pohly <djpohly@gmail.com>
* Clean up #includesDevin J. Pohly2018-02-25
| | | | Signed-off-by: Devin J. Pohly <djpohly@gmail.com>