string_helpers: add kstrdup_quotable_cmdline

}

char *kstrdup_quotable(const char *src, gfp_t gfp);

char *kstrdup_quotable_cmdline(struct task_struct *task, gfp_t gfp);

#endif

#include <linux/export.h>

#include <linux/ctype.h>

#include <linux/errno.h>

#include <linux/mm.h>

#include <linux/slab.h>

#include <linux/string.h>

#include <linux/string_helpers.h>

	return dst;

}

EXPORT_SYMBOL_GPL(kstrdup_quotable);

/*

 * Returns allocated NULL-terminated string containing process

 * command line, with inter-argument NULLs replaced with spaces,

 * and other special characters escaped.

 */

char *kstrdup_quotable_cmdline(struct task_struct *task, gfp_t gfp)

{

	char *buffer, *quoted;

	int i, res;

	buffer = kmalloc(PAGE_SIZE, GFP_TEMPORARY);

	if (!buffer)

		return NULL;

	res = get_cmdline(task, buffer, PAGE_SIZE - 1);

	buffer[res] = '\0';

	/* Collapse trailing NULLs, leave res pointing to last non-NULL. */

	while (--res >= 0 && buffer[res] == '\0')

		;

	/* Replace inter-argument NULLs. */

	for (i = 0; i <= res; i++)

		if (buffer[i] == '\0')

			buffer[i] = ' ';

	/* Make sure result is printable. */

	quoted = kstrdup_quotable(buffer, gfp);

	kfree(buffer);

	return quoted;

}

EXPORT_SYMBOL_GPL(kstrdup_quotable_cmdline);