src/usr.bin/script, branch release/9.0.0

MFC r226403:

2011-10-21T05:37:40Z

In r225809 the intention was to send VEOF only once if STDIN was not a terminal. Unfortunately the fix was incorrect and for flushtime > 0 it keept sending VEOF. Sent VEOF generates ^D\b\b echoed by the terminal, which was reported in bin/161526. Note, we still send VEOF at least once. Otherwise commands like below would hang forever: echo 1 |script /tmp/script.out cat PR: bin/161526 Reported by: Adrian Wontroba , Stefan Bethke Tested by: Stefan Bethke Approved by: re (kib)

MFC r225857:

2011-10-10T11:05:58Z

- Fix a few grammar and mdoc nits in script.1 PR: 161088 Approved by: re (kib)

MFC r225809:

2011-10-04T10:00:28Z

When script(1) reads EOF from input it starts spinning on zero-byte reads eating 100% CPU. Fix this by skipping select on STDIN after reading EOF -- permanently if STDIN is not terminal and for one second if it is. Also after reading EOF from STDIN we have to pass it to the program being scripted. The previous approach was to write zero bytes into the pseudo-terminal. This does not work because zero-byte write does not have any effect on read. Fix this by sending VEOF instead. Submitted by: Ronald Klop Discussed with: kib, Chris Torek Approved by: re (kib)

Remove the advertising clause from UCB copyrighted files in usr.bin. This

2010-12-11T08:32:16Z

is in accordance with the information provided at ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change Also add $FreeBSD$ to a few files to keep svn happy. Discussed with: imp, rwatson

Fix the grammar after I added a second environmental variable.

2010-09-19T00:36:26Z

Submitted by: wxs

+ Add the SCRIPT environmental variable to the sub-shell. Its value is

2010-09-16T22:31:03Z

the name of the typescript file. + Add the 'command' argument (if supplied on the command line) to the typescript file. This creates a more complete typescript when invoked this way - more equal to invoking script without supplying the 'command' argument.

Mark functions and variables as static.

2010-08-16T12:19:36Z

All these functions and variables are local to this compilation unit, so there is no reason why we shouldn't mark them static. This slightly reduces the binary size.

Remove WNOHANG flag from wait3().

2010-04-30T22:33:49Z

Because script(1) now reliably terminates when the TTY is closed, it may be the case that the call to wait3() occurs just before the child process exits. This causes error codes to be ignored. Just change script(1) to use waitpid() instead of wait3(). This makes it more portable and prevents the need for a loop, since waitpid() only returns a specified process. PR: bin/146189 Tested by: amdmi3@, older version MFC after: 2 weeks

Improve the change made in the previous commit.

2010-03-11T11:28:29Z

doshell() never returns, so there is no need to see whether we are the parent process.

Make script(1) a little less broken.

2010-03-11T11:09:58Z

Close the file descriptor to the TTY. There is no reason why the parent process should keep track of the descriptor. This ensures that the application inside properly drains the TTY during exit(2). Reported by: alfred MFC after: 2 weeks