[hackers] [sbase] ed: Don't undo commands in sigint || Roberto E. Vargas Caballero

[git]

commit 6a557314b97a256f21a9964a6fb47f7b08427455
Author:     Roberto E. Vargas Caballero <k...@shike2.com>
AuthorDate: Thu Dec 28 17:26:50 2023 +0100
Commit:     Roberto E. Vargas Caballero <k...@shike2.com>
CommitDate: Thu Dec 28 17:26:50 2023 +0100

    ed: Don't undo commands in sigint
    
    If newcmd is 0 then error() undo all the modifications
    that happened since the last command, but this is  not
    what POSIX mandates:
    
    SIGINT  The ed utility shall interrupt its current activity, write the
            string "?\n" to standard output, and return to command mode
            (see the EXTENDED DESCRIPTION section).

diff --git a/ed.c b/ed.c
index 0705beb..4cba483 100644
--- a/ed.c
+++ b/ed.c
@@ -740,6 +740,7 @@ chksignals(void)
 
        if (intr) {
                intr = 0;
+               newcmd = 1;
                clearerr(stdin);
                error("Interrupt");
        }