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| author |   Jakub Kicinski <jakub.kicinski@netronome.com> | 2018-07-10 14:42:57 -0700 |
|---|---|---|
| committer |   Daniel Borkmann <daniel@iogearbox.net> | 2018-07-11 22:13:33 +0200 |
| commit | 8d1fc3de3d9f9bda0d8ec719d8686e9c5b432573 (patch) | |
| tree | f874af9902794ffeaab8d779edcf808024a3ad9b /tools/bpf/bpftool/main.h | |
| parent | selftests/bpf: add Error: prefix in check_extack helper (diff) | |
| download | wireguard-linux-8d1fc3de3d9f9bda0d8ec719d8686e9c5b432573.tar.xz wireguard-linux-8d1fc3de3d9f9bda0d8ec719d8686e9c5b432573.zip | |
tools: bpftool: refactor argument parsing for prog load
Add a new macro for printing more informative message than straight
usage() when parameters are missing, and use it for prog do_load().
Save the object and pin path argument to variables for clarity.
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Diffstat (limited to 'tools/bpf/bpftool/main.h')
| -rw-r--r-- | tools/bpf/bpftool/main.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/tools/bpf/bpftool/main.h b/tools/bpf/bpftool/main.h index d39f7ef01d23..15b6c49ae533 100644 --- a/tools/bpf/bpftool/main.h +++ b/tools/bpf/bpftool/main.h @@ -50,6 +50,21 @@ #define NEXT_ARG() ({ argc--; argv++; if (argc < 0) usage(); }) #define NEXT_ARGP() ({ (*argc)--; (*argv)++; if (*argc < 0) usage(); }) #define BAD_ARG() ({ p_err("what is '%s'?", *argv); -1; }) +#define GET_ARG() ({ argc--; *argv++; }) +#define REQ_ARGS(cnt) \ + ({ \ + int _cnt = (cnt); \ + bool _res; \ + \ + if (argc < _cnt) { \ + p_err("'%s' needs at least %d arguments, %d found", \ + argv[-1], _cnt, argc); \ + _res = false; \ + } else { \ + _res = true; \ + } \ + _res; \ + }) #define ERR_MAX_LEN 1024 |