From 8d3b3987b8861ea09e2f7f5bd8fcd7b1195e6ae1 Mon Sep 17 00:00:00 2001 From: Rob Landley Date: Fri, 27 Mar 2015 21:25:44 -0500 Subject: tail: add old -123 support and comment out #-f until it's actually implemented. --- toys/posix/tail.c | 22 +++++++++++++++++----- 1 file changed, 17 insertions(+), 5 deletions(-) (limited to 'toys/posix') diff --git a/toys/posix/tail.c b/toys/posix/tail.c index e92c0446..41d46338 100644 --- a/toys/posix/tail.c +++ b/toys/posix/tail.c @@ -4,7 +4,7 @@ * * See http://opengroup.org/onlinepubs/9699919799/utilities/tail.html -USE_TAIL(NEWTOY(tail, "fc-n-[-cn]", TOYFLAG_BIN)) +USE_TAIL(NEWTOY(tail, "?fc-n-[-cn]", TOYFLAG_BIN)) config TAIL bool "tail" @@ -17,7 +17,7 @@ config TAIL -n output the last NUMBER lines (default 10), +X counts from start. -c output the last NUMBER bytes, +NUMBER counts from start - -f follow FILE(s), waiting for more data to be appended + #-f follow FILE(s), waiting for more data to be appended [TODO] config TAIL_SEEK bool "tail seek support" @@ -213,10 +213,22 @@ static void do_tail(int fd, char *name) void tail_main(void) { - // if nothing specified, default -n to -10 - if (!(toys.optflags&(FLAG_n|FLAG_c))) TT.lines = -10; + char **args = toys.optargs; - loopfiles(toys.optargs, do_tail); + if (!(toys.optflags&(FLAG_n|FLAG_c))) { + char *arg = *args; + + // handle old "-42" style arguments + if (arg && *arg == '-' && arg[1]) { + TT.lines = atolx(*(args++)); + toys.optc--; + } + + // if nothing specified, default -n to -10 + TT.lines = -10; + } + + loopfiles(args, do_tail); // do -f stuff } -- cgit v1.2.3