Support the obsolete '+' option

diff --git a/coreutils/tail.c b/coreutils/tail.c
index 024441e..1703eef 100644 (file)
--- a/coreutils/tail.c
+++ b/coreutils/tail.c
@@ -69,12 +69,27 @@ int tail_main(int argc, char **argv)
        char *s, *start, *end, buf[BUFSIZ];
        int i, opt;
 
-       if (( argc >= 2 ) && ( argv [1][0] == '-' ) && isdigit ( argv [1][1] )) {
-               count = atoi ( &argv [1][1] );
-               optind = 2;
+       if (argc >= 2) {
+               int line_num;
+               switch (argv[1][0]) {
+                       case '+':
+                               from_top = 1;
+                               /* FALLS THROUGH */
+                       case '-':
+                               line_num = atoi(&argv[1][1]);
+                               if (line_num != 0) {
+                                       optind = 2;
+                                       count = line_num;
+                               }
+                               break;
+               }
        }
 
-       while ((opt = getopt(argc, argv, "c:fhn:q:s:v")) > 0) {
+#ifdef CONFIG_FEATURE_FANCY_TAIL
+       while ((opt = getopt(argc, argv, "c:fn:q:s:v")) > 0) {
+#else
+       while ((opt = getopt(argc, argv, "fn:")) > 0) {
+#endif
                switch (opt) {
                        case 'f':
                                follow = 1;