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Commit 7d85c434 authored by Wang Nan's avatar Wang Nan Committed by Arnaldo Carvalho de Melo
Browse files

tools: Clone the kernel's strtobool function 



Copying it to tools/lib/string.c, the counterpart to the kernel's
lib/string.c.

This is preparation for enhancing BPF program configuration, which will
allow config string like 'inlines=yes'.

Signed-off-by: default avatarWang Nan <wangnan0@huawei.com>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Jonathan Cameron <jic23@cam.ac.uk>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Zefan Li <lizefan@huawei.com>
Cc: pi3orama@163.com
Link: http://lkml.kernel.org/r/1447675815-166222-6-git-send-email-wangnan0@huawei.com


[ Copied it to tools/lib/string.c instead, to make it usable by other tools/ ]
Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 4ddd3274

tools/include/linux/string.h

+2 −0
Original line number Original line Diff line number Diff line
@@ -6,4 +6,6 @@ 




void *memdup(const void *src, size_t len);

void *memdup(const void *src, size_t len);





int strtobool(const char *s, bool *res);



#endif /* _LINUX_STRING_H_ */
 
#endif /* _LINUX_STRING_H_ */

tools/lib/string.c

+43 −0
Original line number Original line Diff line number Diff line 
/*

 *  linux/tools/lib/string.c

 *

 *  Copied from linux/lib/string.c, where it is:

 *

 *  Copyright (C) 1991, 1992  Linus Torvalds

 *

 *  More specifically, the first copied function was strtobool, which

 *  was introduced by:

 *

 *  d0f1fed29e6e ("Add a strtobool function matching semantics of existing in kernel equivalents")

 *  Author: Jonathan Cameron <jic23@cam.ac.uk>

 */



#include <stdlib.h>

#include <stdlib.h>

#include <string.h>

#include <string.h>

#include <errno.h>

#include <linux/string.h>

#include <linux/string.h>





/**

/**
@@ -17,3 +32,31 @@ void *memdup(const void *src, size_t len) 




	return p;

	return p;

}

}



/**

 * strtobool - convert common user inputs into boolean values

 * @s: input string

 * @res: result

 *

 * This routine returns 0 iff the first character is one of 'Yy1Nn0'.

 * Otherwise it will return -EINVAL.  Value pointed to by res is

 * updated upon finding a match.

 */

int strtobool(const char *s, bool *res)

{

	switch (s[0]) {

	case 'y':

	case 'Y':

	case '1':

		*res = true;

		break;

	case 'n':

	case 'N':

	case '0':

		*res = false;

		break;

	default:

		return -EINVAL;

	}

	return 0;

}