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Fix the following bugs:

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- if a command was specified and script(1) failed to execute it,
    it would print the name of your shell in the error message
    instead of that of the command that failed.

  - since finish() was installed as a SIGCHLD handler, it would
    often run before the main loop had had time to process the
    last few bytes of output. This resulted in very strange
    truncated error messages.

  - script(1) would almost always return with an exit status of 0,
    even if the command returned a non-zero exit status. This broke
    my 'build world, install it and rebuild the kernel' scripts
    because 'make installworld' would run even if 'make buildworld'
    had failed.
This commit is contained in:
Dag-Erling Smørgrav 1998-09-19 09:45:42 +00:00
parent 4e6823805e
commit b1c669700c
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=39481
1 changed files with 27 additions and 19 deletions
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46
usr.bin/script/script.c
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@ -42,7 +42,7 @@ static const char copyright[] =
static char sccsid[] = "@(#)script.c 8.1 (Berkeley) 6/6/93";
#endif
static const char rcsid[] =
"$Id: script.c,v 1.7 1997/12/30 01:20:08 peter Exp $";
"$Id: script.c,v 1.8 1998/03/08 14:19:18 peter Exp $";
#endif /* not lint */
#include <sys/types.h>
@ -71,11 +71,11 @@ int qflg;
struct termios tt;
void done __P((void)) __dead2;
void done __P((int)) __dead2;
void dooutput __P((void));
void doshell __P((char **));
void fail __P((void));
void finish __P((int));
void finish __P((void));
static void usage __P((void));
int
@ -145,11 +145,10 @@ main(argc, argv)
rtt.c_lflag &= ~ECHO;
(void)tcsetattr(STDIN_FILENO, TCSAFLUSH, &rtt);
(void)signal(SIGCHLD, finish);
child = fork();
if (child < 0) {
warn("fork");
fail();
done(1);
}
if (child == 0)
doshell(argv);
@ -196,7 +195,8 @@ main(argc, argv)
start = tvec;
}
}
done();
finish();
done(0);
}
static void
@ -208,19 +208,25 @@ usage()
}
void
finish(signo)
int signo;
finish()
{
register int die, pid;
int die, e, pid;
union wait status;
die = 0;
die = e = 0;
while ((pid = wait3((int *)&status, WNOHANG, 0)) > 0)
if (pid == child)
if (pid == child) {
die = 1;
if (WIFEXITED(status))
e = WEXITSTATUS(status);
else if (WIFSIGNALED(status))
e = WTERMSIG(status);
else /* can't happen */
e = 1;
}
if (die)
done();
done(e);
}
void
@ -236,24 +242,26 @@ doshell(av)
(void)close(master);
(void)fclose(fscript);
login_tty(slave);
if (av[0])
if (av[0]) {
execvp(av[0], av);
else
warn(av[0]);
} else {
execl(shell, "sh", "-i", NULL);
warn(shell);
warn(shell);
}
fail();
}
void
fail()
{
(void)kill(0, SIGTERM);
done();
done(1);
}
void
done()
done(eno)
int eno;
{
time_t tvec;
@ -265,5 +273,5 @@ done()
}
(void)fclose(fscript);
(void)close(master);
exit(0);
exit(eno);
}