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hush: better wording in comments. no code changes

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Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2009-09-21 10:21:44 +02:00
parent bc3e9479c2
commit 69b1cef921
1 changed files with 6 additions and 4 deletions
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10
shell/hush.c
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@ -1038,7 +1038,7 @@ static void restore_G_args(save_arg_t *sv, char **argv)
* is finished or backgrounded. It is the same in interactive and * is finished or backgrounded. It is the same in interactive and
* non-interactive shells, and is the same regardless of whether * non-interactive shells, and is the same regardless of whether
* a user trap handler is installed or a shell special one is in effect. * a user trap handler is installed or a shell special one is in effect.
* ^C or ^Z from keyboard seem to execute "at once" because it usually * ^C or ^Z from keyboard seems to execute "at once" because it usually
* backgrounds (i.e. stops) or kills all members of currently running * backgrounds (i.e. stops) or kills all members of currently running
* pipe. * pipe.
* *
@ -1105,7 +1105,7 @@ static void restore_G_args(save_arg_t *sv, char **argv)
* (child shell is not interactive), * (child shell is not interactive),
* unset all traps (note: regardless of child shell's type - {}, (), etc) * unset all traps (note: regardless of child shell's type - {}, (), etc)
* after [v]fork, if we plan to exec: * after [v]fork, if we plan to exec:
* POSIX says pending signal mask is cleared in child - no need to clear it. * POSIX says fork clears pending signal mask in child - no need to clear it.
* Restore blocked signal set to one inherited by shell just prior to exec. * Restore blocked signal set to one inherited by shell just prior to exec.
* *
* Note: as a result, we do not use signal handlers much. The only uses * Note: as a result, we do not use signal handlers much. The only uses
@ -5673,8 +5673,10 @@ static int handle_dollar(o_string *as_string,
goto make_var; goto make_var;
} }
/* else: it's $_ */ /* else: it's $_ */
/* TODO: */ /* TODO: $_ and $-: */
/* $_ Shell or shell script name; or last cmd name */ /* $_ Shell or shell script name; or last argument of last command
* (if last command wasn't a pipe; if it was, bash sets $_ to "");
* but in command's env, set to full pathname used to invoke it */
/* $- Option flags set by set builtin or shell options (-i etc) */ /* $- Option flags set by set builtin or shell options (-i etc) */
default: default:
o_addQchr(dest, '$'); o_addQchr(dest, '$');