Reset SIGCHLD handler to SIG_DFL.

If run with "-c", both child and parent script processes will handle
SIGCHLD resulting in a possible duplicate "Script done" line in the
output. This fixes bin/545

Reset SIGCHLD handler to SIG_DFL.

If run with "-c", both child and parent script processes will handle
SIGCHLD resulting in a possible duplicate "Script done" line in the
output. This fixes bin/54514.

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1. restore the previous finish() logic to make:
script -e -c /usr/bin/true
script -e -c /usr/bin/false
exit with the proper exit code.
2. handle system return value correctly (nabijaczleweli)
3.

1. restore the previous finish() logic to make:
script -e -c /usr/bin/true
script -e -c /usr/bin/false
exit with the proper exit code.
2. handle system return value correctly (nabijaczleweli)
3. factor out the conversion of wait status -> shell return code.

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script: declare dooutput as __dead

This fixes the Clang build, which failed with:

usr.bin/script/script.c:255:1: error:
function 'dooutput' could be declared with attribute 'noreturn'
[-Wer

script: declare dooutput as __dead

This fixes the Clang build, which failed with:

usr.bin/script/script.c:255:1: error:
function 'dooutput' could be declared with attribute 'noreturn'
[-Werror,-Wmissing-noreturn]

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PR/56254: RVP: Don't call non-async-signal-safe functions from signal handlers.
Establish a non-restart signal handler to avoid blocking in long I/Os.

dooutput can return if finish() does not find a chile process.

If -e is specified exit with the exit status of the child process in
a shell-like format (nabijaczleweli)

Unlike done() childwait() returns, found by clang.

PR/55605: Soumendra Ganguly: Wait for child to finish when stdin is not a tty

PR/55551 Soumendra Ganguly: Simplify tcgetattr error handling.

PR/55548: Soumendra Ganguly: Since isatty(3) is implemented using
tcgetattr(3), call it directly to avoid calling it twice. This
makes error handling more precise. Also don't call err(3) when
tcsetat

PR/55548: Soumendra Ganguly: Since isatty(3) is implemented using
tcgetattr(3), call it directly to avoid calling it twice. This
makes error handling more precise. Also don't call err(3) when
tcsetattr(3) fails.

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remove trailing whitespace

PR/55531: Soumendra Ganguly:
- add more error handling
- handle -p when not a terminal
- call termreset() before printing script done, so that it is printed correctly

Also:
- use ssize_t/size_t inst

PR/55531: Soumendra Ganguly:
- add more error handling
- handle -p when not a terminal
- call termreset() before printing script done, so that it is printed correctly

Also:
- use ssize_t/size_t instead of int
- use EXIT_SUCCESS/EXIT_FAILURE
- check result of fork() against -1

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PR/55529: Soumendra Ganguly: configure the terminal in raw mode during
playback so that output postprocessing is not done and playback of programs
using curses does not appear corrupted.

static + __dead

err -> errx where appropriate

use system to parse args

add more features found in other unices

Fix WARNS=4 issues (-Wcast-qual -Wshadow)

Remove the \n and tabs from the __COPYRIGHT() strings.
Tweak to use a consistent format.

PR/36955: Ighighi: Use fseeko instead of fseek.

Apparently seeking forward on a FIFO does not work (why?). Read instead.
Patch from Jukka Salmi.

deal with non-regular files.

Fix PR: 26363: script core dumps on incorrect input files.

This patch virtually re-writes the playback code and contains
improvements (mainly the dependency upon BUFSIZ being the same
size as it was

Fix PR: 26363: script core dumps on incorrect input files.

This patch virtually re-writes the playback code and contains
improvements (mainly the dependency upon BUFSIZ being the same
size as it was wrote at).

OK: christos, joerg

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ANSIfy. de-P.

Add -d to usage; use getprogname(3). From Kouichirou Hiratsuka in PR 26227.