nightmaremail

commit ec5d57bd0530d190fb0eec2552caadcc7944ac02
parent a524a360927f79dd29d2c56b46892828eb79a5fa
Author: Rolf Eike Beer <eike@sf-mail.de>
Date:   Mon, 15 Jun 2020 20:23:47 +0200

fix read() return value handling in getln2()

If substdio_get() return -1 this would decrease the length setting in the passed
substdio.

Diffstat:
M
getln2.c
 | 
6
++++--

1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/getln2.c b/getln2.c
@@ -17,7 +17,7 @@ int sep;
   sa->len = 0;
  
   for (;;) {
-    ssize_t n;
+    ssize_t n, m;
     n = substdio_feed(ss);
     if (n < 0) return -1;
     if (n == 0) { *clen = 0; return 0; }
@@ -26,6 +26,8 @@ int sep;
     if (i < n) { substdio_SEEK(ss,*clen = i + 1); *cont = x; return 0; }
     if (!stralloc_readyplus(sa,n)) return -1;
     i = sa->len;
-    sa->len = i + substdio_get(ss,sa->s + i,n);
+    m = substdio_get(ss,sa->s + i,n);
+    if (m != -1)
+      sa->len = i + m;
   }
 }