1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0 2*4882a593Smuzhiyun /* 3*4882a593Smuzhiyun * usage.c 4*4882a593Smuzhiyun * 5*4882a593Smuzhiyun * Various reporting routines. 6*4882a593Smuzhiyun * Originally copied from GIT source. 7*4882a593Smuzhiyun * 8*4882a593Smuzhiyun * Copyright (C) Linus Torvalds, 2005 9*4882a593Smuzhiyun */ 10*4882a593Smuzhiyun #include "util.h" 11*4882a593Smuzhiyun #include <stdio.h> 12*4882a593Smuzhiyun #include <stdlib.h> 13*4882a593Smuzhiyun #include <linux/compiler.h> 14*4882a593Smuzhiyun usage_builtin(const char * err)15*4882a593Smuzhiyunstatic __noreturn void usage_builtin(const char *err) 16*4882a593Smuzhiyun { 17*4882a593Smuzhiyun fprintf(stderr, "\n Usage: %s\n", err); 18*4882a593Smuzhiyun exit(129); 19*4882a593Smuzhiyun } 20*4882a593Smuzhiyun 21*4882a593Smuzhiyun /* If we are in a dlopen()ed .so write to a global variable would segfault 22*4882a593Smuzhiyun * (ugh), so keep things static. */ 23*4882a593Smuzhiyun static void (*usage_routine)(const char *err) __noreturn = usage_builtin; 24*4882a593Smuzhiyun usage(const char * err)25*4882a593Smuzhiyunvoid usage(const char *err) 26*4882a593Smuzhiyun { 27*4882a593Smuzhiyun usage_routine(err); 28*4882a593Smuzhiyun } 29