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Diffstat (limited to 'coreutils/tail.c')
-rw-r--r--coreutils/tail.c23
1 files changed, 19 insertions, 4 deletions
diff --git a/coreutils/tail.c b/coreutils/tail.c
index 024441e..1703eef 100644
--- 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;