4 files changed, 32 insertions, 18 deletions

diff --git a/tools/bpf/bpftool/Documentation/Makefile b/tools/bpf/bpftool/Documentation/Makefile
index bde77d7c4390..37292bb5ce60 100644
--- a/tools/bpf/bpftool/Documentation/Makefile
+++ b/tools/bpf/bpftool/Documentation/Makefile
@@ -6,7 +6,7 @@ RM ?= rm -f
 
 # Make the path relative to DESTDIR, not prefix
 ifndef DESTDIR
-prefix?=$(HOME)
+prefix ?= /usr/local
 endif
 mandir ?= $(prefix)/share/man
 man8dir = $(mandir)/man8
diff --git a/tools/bpf/bpftool/Makefile b/tools/bpf/bpftool/Makefile
index 813826c50936..ec3052c0b004 100644
--- a/tools/bpf/bpftool/Makefile
+++ b/tools/bpf/bpftool/Makefile
@@ -45,8 +45,8 @@ $(LIBBPF)-clean:
 	$(call QUIET_CLEAN, libbpf)
 	$(Q)$(MAKE) -C $(BPF_DIR) OUTPUT=$(OUTPUT) clean >/dev/null
 
-prefix = /usr
-bash_compdir ?= $(prefix)/share/bash-completion/completions
+prefix = /usr/local
+bash_compdir ?= /usr/share/bash-completion/completions
 
 CC = gcc
 
@@ -76,6 +76,7 @@ clean: $(LIBBPF)-clean
 	$(Q)rm -rf $(OUTPUT)bpftool $(OUTPUT)*.o $(OUTPUT)*.d
 
 install:
+	install -m 0755 -d $(prefix)/sbin
 	install $(OUTPUT)bpftool $(prefix)/sbin/bpftool
 	install -m 0755 -d $(bash_compdir)
 	install -m 0644 bash-completion/bpftool $(bash_compdir)
@@ -88,5 +89,5 @@ doc-install:
 
 FORCE:
 
-.PHONY: all clean FORCE
+.PHONY: all clean FORCE install doc doc-install
 .DEFAULT_GOAL := all
diff --git a/tools/bpf/bpftool/main.c b/tools/bpf/bpftool/main.c
index d6e4762170a4..d294bc8168be 100644
--- a/tools/bpf/bpftool/main.c
+++ b/tools/bpf/bpftool/main.c
@@ -58,11 +58,19 @@ bool show_pinned;
 struct pinned_obj_table prog_table;
 struct pinned_obj_table map_table;
 
+static void __noreturn clean_and_exit(int i)
+{
+	if (json_output)
+		jsonw_destroy(&json_wtr);
+
+	exit(i);
+}
+
 void usage(void)
 {
 	last_do_help(last_argc - 1, last_argv + 1);
 
-	exit(-1);
+	clean_and_exit(-1);
 }
 
 static int do_help(int argc, char **argv)
@@ -280,6 +288,7 @@ int main(int argc, char **argv)
 	hash_init(prog_table.table);
 	hash_init(map_table.table);
 
+	opterr = 0;
 	while ((opt = getopt_long(argc, argv, "Vhpjf",
 				  options, NULL)) >= 0) {
 		switch (opt) {
@@ -291,13 +300,25 @@ int main(int argc, char **argv)
 			pretty_output = true;
 			/* fall through */
 		case 'j':
-			json_output = true;
+			if (!json_output) {
+				json_wtr = jsonw_new(stdout);
+				if (!json_wtr) {
+					p_err("failed to create JSON writer");
+					return -1;
+				}
+				json_output = true;
+			}
+			jsonw_pretty(json_wtr, pretty_output);
 			break;
 		case 'f':
 			show_pinned = true;
 			break;
 		default:
-			usage();
+			p_err("unrecognized option '%s'", argv[optind - 1]);
+			if (json_output)
+				clean_and_exit(-1);
+			else
+				usage();
 		}
 	}
 
@@ -306,15 +327,6 @@ int main(int argc, char **argv)
 	if (argc < 0)
 		usage();
 
-	if (json_output) {
-		json_wtr = jsonw_new(stdout);
-		if (!json_wtr) {
-			p_err("failed to create JSON writer");
-			return -1;
-		}
-		jsonw_pretty(json_wtr, pretty_output);
-	}
-
 	bfd_init();
 
 	ret = cmd_select(cmds, argc, argv, do_help);
diff --git a/tools/bpf/bpftool/main.h b/tools/bpf/bpftool/main.h
index 9c191e222d6f..bff330b49791 100644
--- a/tools/bpf/bpftool/main.h
+++ b/tools/bpf/bpftool/main.h
@@ -41,6 +41,7 @@
 #include <stdbool.h>
 #include <stdio.h>
 #include <linux/bpf.h>
+#include <linux/compiler.h>
 #include <linux/kernel.h>
 #include <linux/hashtable.h>
 
@@ -50,7 +51,7 @@
 
 #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'?\n", *argv); -1; })
+#define BAD_ARG()	({ p_err("what is '%s'?", *argv); -1; })
 
 #define ERR_MAX_LEN	1024
 
@@ -80,7 +81,7 @@ void p_info(const char *fmt, ...);
 
 bool is_prefix(const char *pfx, const char *str);
 void fprint_hex(FILE *f, void *arg, unsigned int n, const char *sep);
-void usage(void) __attribute__((noreturn));
+void usage(void) __noreturn;
 
 struct pinned_obj_table {
 	DECLARE_HASHTABLE(table, 16);