/*
 * getopt.c
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/kernel.h>
#include <linux/string.h>

#include <asm/errno.h>

#include "getopt.h"

/**
 *	ncp_getopt - option parser
 *	@caller: name of the caller, for error messages
 *	@options: the options string
 *	@opts: an array of &struct option entries controlling parser operations
 *	@optopt: output; will contain the current option
 *	@optarg: output; will contain the value (if one exists)
 *	@value: output; may be NULL; will be overwritten with the integer value
 *		of the current argument.
 *
 *	Helper to parse options on the format used by mount ("a=b,c=d,e,f").
 *	Returns opts->val if a matching entry in the 'opts' array is found,
 *	0 when no more tokens are found, -1 if an error is encountered.
 */
int ncp_getopt(const char *caller, char **options, const struct ncp_option *opts,
	       char **optopt, char **optarg, unsigned long *value)
{
	char *token;
	char *val;

	do {
		if ((token = strsep(options, ",")) == NULL)
			return 0;
	} while (*token == '\0');
	if (optopt)
		*optopt = token;

	if ((val = strchr (token, '=')) != NULL) {
		*val++ = 0;
	}
	*optarg = val;
	for (; opts->name; opts++) {
		if (!strcmp(opts->name, token)) {
			if (!val) {
				if (opts->has_arg & OPT_NOPARAM) {
					return opts->val;
				}
				pr_info("%s: the %s option requires an argument\n",
					caller, token);
				return -EINVAL;
			}
			if (opts->has_arg & OPT_INT) {
				int rc = kstrtoul(val, 0, value);

				if (rc) {
					pr_info("%s: invalid numeric value in %s=%s\n",
						caller, token, val);
					return rc;
				}
				return opts->val;
			}
			if (opts->has_arg & OPT_STRING) {
				return opts->val;
			}
			pr_info("%s: unexpected argument %s to the %s option\n",
				caller, val, token);
			return -EINVAL;
		}
	}
	pr_info("%s: Unrecognized mount option %s\n", caller, token);
	return -EOPNOTSUPP;
}
ref='/cgit.cgi/linux/net-next.git/tree/net/irda/irnet?h=nds-private-remove&amp;id=3365135d43f861003555c963b309672d053a2228'>tree</a><a class='active' href='/cgit.cgi/linux/net-next.git/commit/net/irda/irnet?h=nds-private-remove&amp;id=3365135d43f861003555c963b309672d053a2228'>commit</a><a href='/cgit.cgi/linux/net-next.git/diff/net/irda/irnet?h=nds-private-remove&amp;id=3365135d43f861003555c963b309672d053a2228'>diff</a></td><td class='form'><form class='right' method='get' action='/cgit.cgi/linux/net-next.git/log/net/irda/irnet'>
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/commit/?h=nds-private-remove&amp;id=3365135d43f861003555c963b309672d053a2228'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/net?h=nds-private-remove&amp;id=3365135d43f861003555c963b309672d053a2228'>net</a>/<a href='/cgit.cgi/linux/net-next.git/commit/net/irda?h=nds-private-remove&amp;id=3365135d43f861003555c963b309672d053a2228'>irda</a>/<a href='/cgit.cgi/linux/net-next.git/commit/net/irda/irnet?h=nds-private-remove&amp;id=3365135d43f861003555c963b309672d053a2228'>irnet</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='h' value='nds-private-remove'/><input type='hidden' name='id' value='3365135d43f861003555c963b309672d053a2228'/><table><tr><td colspan='2'/></tr><tr><td class='label'>context:</td><td class='ctrl'><select name='context' onchange='this.form.submit();'><option value='1'>1</option><option value='2'>2</option><option value='3' selected='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2017-01-27 12:44:32 -0800</td></tr>
<tr><th>committer</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2017-01-27 12:44:32 -0800</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/net/irda/irnet?h=nds-private-remove&amp;id=3365135d43f861003555c963b309672d053a2228'>3365135d43f861003555c963b309672d053a2228</a> (<a href='/cgit.cgi/linux/net-next.git/patch/net/irda/irnet?id=3365135d43f861003555c963b309672d053a2228'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?h=nds-private-remove&amp;id=3365135d43f861003555c963b309672d053a2228'>bfef4adec5da118bf1b3df7e5cff74f45af9e02d</a> /<a href='/cgit.cgi/linux/net-next.git/tree/net/irda/irnet?h=nds-private-remove&amp;id=3365135d43f861003555c963b309672d053a2228'>net/irda/irnet</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/net/irda/irnet?h=nds-private-remove&amp;id=5906374446386fd16fe562b042429d905d231ec3'>5906374446386fd16fe562b042429d905d231ec3</a> (<a href='/cgit.cgi/linux/net-next.git/diff/net/irda/irnet?h=nds-private-remove&amp;id=3365135d43f861003555c963b309672d053a2228&amp;id2=5906374446386fd16fe562b042429d905d231ec3'>diff</a>)</td></tr><tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/net/irda/irnet?h=nds-private-remove&amp;id=e0d76fa4475ef2cf4b52d18588b8ce95153d021b'>e0d76fa4475ef2cf4b52d18588b8ce95153d021b</a> (<a href='/cgit.cgi/linux/net-next.git/diff/net/irda/irnet?h=nds-private-remove&amp;id=3365135d43f861003555c963b309672d053a2228&amp;id2=e0d76fa4475ef2cf4b52d18588b8ce95153d021b'>diff</a>)</td></tr></table>
<div class='commit-subject'>Merge tag 'xfs-for-linus-4.10-rc6-5' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux</div><div class='commit-msg'>Pull xfs uodates from Darrick Wong:
 "I have some more fixes this week: better input validation, corruption
  avoidance, build fixes, memory leak fixes, and a couple from Christoph
  to avoid an ENOSPC failure.

  Summary:
   - Fix race conditions in the CoW code
   - Fix some incorrect input validation checks
   - Avoid crashing fs by running out of space when freeing inodes
   - Fix toctou race wrt whether or not an inode has an attr
   - Fix build error on arm
   - Fix page refcount corruption when readahead fails
   - Don't corrupt userspace in the bmap ioctl"

* tag 'xfs-for-linus-4.10-rc6-5' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
  xfs: prevent quotacheck from overloading inode lru
  xfs: fix bmv_count confusion w/ shared extents
  xfs: clear _XBF_PAGES from buffers when readahead page
  xfs: extsize hints are not unlikely in xfs_bmap_btalloc
  xfs: remove racy hasattr check from attr ops
  xfs: use per-AG reservations for the finobt
  xfs: only update mount/resv fields on success in __xfs_ag_resv_init
  xfs: verify dirblocklog correctly
  xfs: fix COW writeback race
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?h=nds-private-remove&amp;id=3365135d43f861003555c963b309672d053a2228'>Diffstat</a> (limited to 'net/irda/irnet')</div><table summary='diffstat' class='diffstat'>