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Tested sfeed, sfeed_plain and sfeed_html for now.
There are minor changes required for sfeed and some additional compatibility
function changes required to make the format tools compile.
Rough list of changes required:
- xml.c: rename getchar_unlocked -> getchar
- sfeed.c: EOVERFLOW -> ENOMEM
- wcwidth: just filter ASCII range < 32 = -1 and > 127 = 0, rest = 1.
- getline
- localtime_r -> just do a localtime + memcpy.
Make sure to increase stack size when compiling:
owcc -k32768 -Os -s -o sfeed.exe sfeed.c util.c xml.c
Resulting .exe binary is 27KB, 17KB compressed with UPX.
The HTML output looks fine in Netscape Navigator and Internet Explorer 3 :)
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Found while testing sfeed on MS-DOS with Open Watcom (for fun :)).
There an int is 16-bit and sfeed incorrectly wrapped the value, which produced
incorrect parsed UNIX timestamps as output.
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for lazyloaded items
Fix the code pattern of freeing the line when getline returns -1 but no error
flag is set on the stream (such as EOF).
Note that on errors (even ENOMEM: out-of-memory) an error flag is set on the
stream and the process would exit and clean up all it's resources.
This would be very hard to trigger. The following conditions would have to be
true:
* Lazyloading of items is enabled: SFEED_LAZYLOAD=1 is set.
* Items of the feed are read and their offsets stored.
* The line is read/lazy-loaded again by it's offset but returns EOF (not a read
error) this time.
This could maybe happen if the feed file was changed and made smaller while
sfeed_curses is running and the remembered offset is now beyond the file.
Note that the sfeed_curses(1) man page describes a workaround for a similar
condition by sending SIGHUP if the sfeed(5) data was changed to reload the feed
file.
References:
* https://man.openbsd.org/getline
"It is the responsibility of the caller to free(3) *lineptr when it is no
longer needed. Even when it fails, getdelim() may update *lineptr."
* https://pubs.opengroup.org/onlinepubs/9699919799/functions/getline.html
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... and some small rewording.
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This fixes the keys on the sun-color console on OpenIndiana/Illumos/OpenSolaris
(and other systems using these keys).
See also the table:
https://invisible-island.net/xterm/ctlseqs/ctlseqs.html
Section "Non-Function Keys".
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This fixes the page up and page down keys in the cons25 console on
DragonFlyBSD.
See also the table:
https://invisible-island.net/xterm/ctlseqs/ctlseqs.html
Section "Non-Function Keys".
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This was a copy-pasta.
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This make it also cleanly compile without any other changes on GNU/Hurd.
Reference: https://www.gnu.org/software/hurd/hurd/porting/guidelines.html
Section: "PATH_MAX, MAX_PATH, MAXPATHLEN, _POSIX_PATH_MAX"
The fopen() functions will return NULL when the path is too long and set
errno = ENAMETOOLONG.
"The length of a pathname exceeds {PATH_MAX}, or pathname resolution of a
symbolic link produced an intermediate result with a length that exceeds
{PATH_MAX}."
Reference: https://pubs.opengroup.org/onlinepubs/9699919799/functions/fopen.html
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- Fix a typo "Url" -> "URL".
- Be a bit more clear some overridable functions read from stdin.
- Some small rewording.
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It is used in the examples.
(Do not directly reference iconv to keep some kind of clear reference list)
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It is a caveat while parsing the data in the sfeed(1) program.
Keep it described in the sfeed(1) man page.
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Introduced by a code cleanup/refactor in commit
59ba2ed29bcbe67de6e9ee1e7fb18744f7490c22
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This makes it easier to reuse the code from reading plain-text list of items
from a file and uses a struct urls to keep its state in a cleaner way.
+ some small code-style improvements and reshuffling.
Inspired by a question from NRK by mail about implementing a "read later"
feature.
(A quick local experiment shows it can be done in ~70 lines of added code).
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this check is already done in util.h and is no longer needed after the
`sfeed_curses -> sfeed` merge.
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Write it in a more verbose, clear and C90-style manner.
This workarounds a bug in scc too (reported upstream and will be fixed of
course). All tools in sfeed can now be compiled with minicurses-mode with the
scc compiler and musl libc without any modifications needed.
scc: http://www.simple-cc.org/
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found via codespell
$ codespell --ignore-regex Nd
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Multiple function calls should still be nested in a do { } while(0), but this
is hopefully obvious looking at the other lines.
While testing, gcc with -O0 created the same binary.
clang added a single jmp instruction.
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This was used in commit a58fa45f25da4f18d7b8c1a815884f67b965406f and previous,
but the code for non-interactive process cleanup was later removed, so clearing
the struct is not not needed anymore, because it is unused.
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This should not use the plain-text URL file ($SFEED_URL_FILE).
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In the past there was an ioctl() call in setupterm(), so this include is not
needed anymore.
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It would mess up the output since the progress bar writes to stderr aswell.
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Do not restart the syscall waitpid, explicitly mention not setting SA_RESTART.
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This now handles SIGTERM on sfeed_curses properly while an interactive child program is running.
Test-case program:
https://git.codemadness.org/sfeed_tests/commit/cd4268d4f71b5d7ab0df593d95e70188475d76bb.html
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This is only for plumbing in non-interactive mode in forkexec(), but not piping
content.
Probably obvious what the descriptors are, but also add a few comments to dup2
of the file descriptors (stdin, stdout, stderr).
To reproduce a behaviour:
Plumb script:
#!/bin/sh
dmenu
Then launch it:
SFEED_PLUMB_INTERACTIVE=0 SFEED_PLUMB=thescript sfeed_curses ~/.sfeed/feeds/*
The program now waits on input while in non-interactive mode and only seems to
hang.
After:
The program starts but just has no input passed to it.
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- SIGINT: reword, canceling the line editor is the exception.
- Document the order of signal handling.
- Document interactive and non-interactive behaviour in a separate section and
in more detail.
Remove repetition for each *_INTERACTIVE environment variable.
- Document SIGINT and SIGTERM exit status.
- Typo: "statusbar" -> "status bar".
- Reword a few sentences.
With additional changes and feedback from adc, thanks!
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... and bump the date also.
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From the mdoc(7) extended introduction[0]:
>To output a backslash, use the escape sequence ‘\e’. Never use the
>escape sequence ‘\\’ in any context.
0: https://mandoc.bsd.lv/mdoc/intro/escaping.html
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Noticed by the Debian scanner for typos (typo-in-manual-page):
https://mentors.debian.net/package/sfeed/
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No functional change intended. Just slightly more clear.
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This makes sure when processes exit they are reaped immediately (instead of
after closing the line editor).
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editor
This allows pasting in the terminal and also doesnt spam mouse events, which
are not useful here.
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Reported by Leon Fisher, thanks!
"Each signal should have its own sig_atomic_t variable if you want to
keep state for all of them independently."
A similar issue was referenced in a OpenBSD tech mailinglist thread:
https://marc.info/?l=openbsd-tech&m=162940120614641&w=2
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