Avoid destroying the CLI line when moving the cursor backward and trying to autocomplete.

When moving the cursor backward and pressing TAB to autocomplete, a NULL is put
in the line and we are loosing what we have already wrote after the actual
cursor position.

(closes issue #14373)
Reported by: eliel
Patches:
      asterisk.c.patch uploaded by eliel (license 64)
      Tested by: lmadsen

git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.4@184188 65c4cc65-6c06-0410-ace0-fbb531ad65f3

diff --git a/main/asterisk.c b/main/asterisk.c
index 2cabfc272bb2526bcd70219013fa45ee098a70a6..eb79e71a189acc70d9f9e5710b1f6995e7ee28c7 100644 (file)
--- a/main/asterisk.c
+++ b/main/asterisk.c
@@ -2121,11 +2121,12 @@ static char *cli_complete(EditLine *el, int ch)
        int nummatches = 0;
        char **matches;
        int retval = CC_ERROR;
-       char buf[2048];
+       char buf[2048], savechr;
        int res;
 
        LineInfo *lf = (LineInfo *)el_line(el);
 
+       savechr = *(char *)lf->cursor;
        *(char *)lf->cursor = '\0';
        ptr = (char *)lf->cursor;
        if (ptr) {
@@ -2151,8 +2152,10 @@ static char *cli_complete(EditLine *el, int ch)
                        char *mbuf;
                        int mlen = 0, maxmbuf = 2048;
                        /* Start with a 2048 byte buffer */                     
-                       if (!(mbuf = ast_malloc(maxmbuf)))
+                       if (!(mbuf = ast_malloc(maxmbuf))) {
+                               lf->cursor[0] = savechr;
                                return (char *)(CC_ERROR);
+                       }
                        snprintf(buf, sizeof(buf),"_COMMAND MATCHESARRAY \"%s\" \"%s\"", lf->buffer, ptr); 
                        fdsend(ast_consock, buf);
                        res = 0;
@@ -2161,8 +2164,10 @@ static char *cli_complete(EditLine *el, int ch)
                                if (mlen + 1024 > maxmbuf) {
                                        /* Every step increment buffer 1024 bytes */
                                        maxmbuf += 1024;                                        
-                                       if (!(mbuf = ast_realloc(mbuf, maxmbuf)))
+                                       if (!(mbuf = ast_realloc(mbuf, maxmbuf))) {
+                                               lf->cursor[0] = savechr;
                                                return (char *)(CC_ERROR);
+                                       }
                                }
                                /* Only read 1024 bytes at a time */
                                res = read(ast_consock, mbuf + mlen, 1024);
@@ -2222,6 +2227,8 @@ static char *cli_complete(EditLine *el, int ch)
                free(matches);
        }
 
+       lf->cursor[0] = savechr;
+
        return (char *)(long)retval;
 }