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Attempt #2 to fix script(1) if the standard input is closed: If we

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read EOF from STDIN_FILENO, write zero bytes into the pseudo-terminal;
this is interpreted as an EOF by the program being scripted.

I've tested this with two non-interactive scripts:
# echo 5 | script foo sh -c 'read x; sleep $x; echo bar'
# echo bar | xargs script foo echo
and one interactive program:
# script foo more /etc/passwd
and everything seems to work properly...

PR:		bin/56166, bin/57414, ports/57415, ports/60534
Approved by:	rwatson (mentor)
MFC after:	2 weeks
This commit is contained in:
Colin Percival 2004-02-15 17:30:13 +00:00
parent a20e9655b9
commit d6a68195af
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=125848
1 changed files with 3 additions and 1 deletions
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4
usr.bin/script/script.c
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@ -178,8 +178,10 @@ main(int argc, char *argv[])
break;
if (n > 0 && FD_ISSET(STDIN_FILENO, &rfd)) {
cc = read(STDIN_FILENO, ibuf, BUFSIZ);
if (cc <= 0)
if (cc < 0)
break;
if (cc == 0)
(void)write(master, ibuf, 0);
if (cc > 0) {
(void)write(master, ibuf, cc);
if (kflg && tcgetattr(master, &stt) >= 0 &&