sh: Do not abort on a redirection error if there is no command word.
Although simple commands without a command word (only assignments and/or redirections) are much like special builtins, POSIX and most shells seem to agree that redirection errors should not abort the shell in this case. Of course, the assignments persist and assignment errors are fatal. To get the old behaviour portably, use the ':' special builtin. To get the new behaviour portably, given that there are no assignments, use the 'true' regular builtin.
This commit is contained in:
parent
a93ba965a7
commit
6be35ddc1a
@ -680,7 +680,7 @@ evalcommand(union node *cmd, int flags, struct backcmd *backcmd)
|
||||
/* Variable assignment(s) without command */
|
||||
cmdentry.cmdtype = CMDBUILTIN;
|
||||
cmdentry.u.index = BLTINCMD;
|
||||
cmdentry.special = 1;
|
||||
cmdentry.special = 0;
|
||||
} else {
|
||||
static const char PATH[] = "PATH=";
|
||||
int cmd_flags = 0, bltinonly = 0;
|
||||
@ -891,6 +891,12 @@ evalcommand(union node *cmd, int flags, struct backcmd *backcmd)
|
||||
}
|
||||
handler = &jmploc;
|
||||
redirect(cmd->ncmd.redirect, mode);
|
||||
/*
|
||||
* If there is no command word, redirection errors should
|
||||
* not be fatal but assignment errors should.
|
||||
*/
|
||||
if (argc == 0 && !(flags & EV_BACKCMD))
|
||||
cmdentry.special = 1;
|
||||
if (cmdentry.special)
|
||||
listsetvar(cmdenviron);
|
||||
commandname = argv[0];
|
||||
|
7
tools/regression/bin/sh/errors/redirection-error4.0
Normal file
7
tools/regression/bin/sh/errors/redirection-error4.0
Normal file
@ -0,0 +1,7 @@
|
||||
# $FreeBSD$
|
||||
# A redirection error should not abort the shell if there is no command word.
|
||||
exec 2>/dev/null
|
||||
</var/empty/x
|
||||
</var/empty/x y=2
|
||||
y=2 </var/empty/x
|
||||
exit 0
|
Loading…
Reference in New Issue
Block a user