make: fix incorrect handling of escaped newline

Fix a bug in process_command() where an escaped newline followed by a character other than tab resulted in premature termination of the command.
rmyorston · Aug 28, 2022 · 182e489 · 182e489
1 parent 67a630e
commit 182e489
Showing 1 changed file with 4 additions and 5 deletions.
diff --git a/miscutils/make.c b/miscutils/make.c
@@ -1402,11 +1402,10 @@ process_command(char *s)
 	// Remove tab following escaped newline.  Stop processing at a
 	// non-escaped newline.
 	for (t = u = s; *u && *u != '\n'; u++) {
-		if (u[0] == '\\' && u[1] == '\n' && u[2] == '\t') {
-			*t++ = *u++;
-			*t++ = *u++;
-		} else {
-			*t++ = *u;
+		*t++ = *u;
+		if (u[0] == '\\' && u[1] == '\n') {
+			*t++ = '\n';
+			u += (u[2] == '\t') ? 2 : 1;
 		}
 	}
 	*t = '\0';