Fix config validation fail when no new line from end of file

1. i3 config validation failed when the new line is missing from the end of file.
   The error was: "ERROR: Your line continuation is too long, it exceeds 4096 bytes".
   It is wrong to assume that there is always a '\n' at the end of each line in the config file.
   (Not for the last line.)
   Fix it via adding a end-of-file check.

2. See the issue #2051. (https://github.com/i3/i3/issues/2051)

diff --git a/src/config_parser.c b/src/config_parser.c
index 0f3d33ec0600ca23b56e2e25a1d7e1dd34a6d804..27cdeb93fe571cd5d2869ad4855f9e4e415d8236 100644 (file)
--- a/src/config_parser.c
+++ b/src/config_parser.c
@@ -843,7 +843,7 @@ bool parse_file(const char *f, bool use_nagbar) {
                 break;
             die("Could not read configuration file\n");
         }
-        if (buffer[strlen(buffer) - 1] != '\n') {
+        if (buffer[strlen(buffer) - 1] != '\n' && !feof(fstr)) {
             ELOG("Your line continuation is too long, it exceeds %zd bytes\n", sizeof(buffer));
         }
         continuation = strstr(buffer, "\\\n");