33876: etc.: Separate errors and keyboards interrupts

Combination of 12 commits from interrupt_abort branch.

Basic strategy is to introduce bits to errflag and to set and
reset them separately.

Remove interrupt status on return to main keymap.

Turn off ERRFLAG_INT for always block.

Restore bit thereafter: we probably need a new variable in order
to allow user interrupts to be reset in the always block.

Add TRY_BLOCK_INTERRUPT

This works the same as TRY_BLOCK_ERROR, but for a SIGINT, too.

Ensure propagation of SIGINT from exited job.

If received by foreground job, shell uses ERRFLAG_INT, not
ERRFLAG_ERROR, to set the new state.

Reset errflag before precmd()

Add always block in _main_completion to fix ZLS_COLORS

Ensures we get the right state of $ZLS_COLORS at the end of _main_complete
even if there's an interrupt.  However, the "right state" is a bit messy
as it depends on styles.

1 files changed, 7 insertions, 5 deletions

diff --git a/Src/glob.c b/Src/glob.c
index b3903f2ff..82f8d626c 100644
--- a/Src/glob.c
+++ b/Src/glob.c
@@ -682,7 +682,7 @@ parsecomplist(char *instr)
 	/* Now get the next path component if there is one. */
 	l1 = (Complist) zhalloc(sizeof *l1);
 	if ((l1->next = parsecomplist(instr)) == NULL) {
-	    errflag = 1;
+	    errflag |= ERRFLAG_ERROR;
 	    return NULL;
 	}
 	l1->pat = patcompile(NULL, compflags | PAT_ANY, NULL);
@@ -728,7 +728,7 @@ parsecomplist(char *instr)
 	    return (ef && !l1->next) ? NULL : l1;
 	}
     }
-    errflag = 1;
+    errflag |= ERRFLAG_ERROR;
     return NULL;
 }
 
@@ -1790,7 +1790,7 @@ zglob(LinkList list, LinkNode np, int nountok)
 	    insertlinknode(list, node, ostr);
 	    return;
 	}
-	errflag = 0;
+	errflag &= ~ERRFLAG_ERROR;
 	zerr("bad pattern: %s", ostr);
 	return;
     }
@@ -1873,7 +1873,8 @@ zglob(LinkList list, LinkNode np, int nountok)
 				tmpptr->sortstrs[iexec] = tmpptr->name;
 			}
 
-			errflag = ef;
+			/* Retain any user interrupt error status */
+			errflag = ef | (errflag & ERRFLAG_INT);
 			lastval = lv;
 		    } else {
 			/* Failed, let's be safe */
@@ -3733,7 +3734,8 @@ qualsheval(char *name, UNUSED(struct stat *buf), UNUSED(off_t days), char *str)
 	execode(prog, 1, 0, "globqual");
 
 	ret = lastval;
-	errflag = ef;
+	/* Retain any user interrupt error status */
+	errflag = ef | (errflag & ERRFLAG_INT);
 	lastval = lv;
 
 	if (!(inserts = getaparam("reply")) &&