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Ian Campbell
0f2b207d46
xs_perm_to_string takes a size_t which isn't defined by anything pulled in directly by this header. Given the other headers xenstore_lib.h pulls in this looks to be an oversight rather than a deliberate policy. Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Acked-by: Wei Liu <wei.liu2@citrix.com>
86 lines
2.8 KiB
C
86 lines
2.8 KiB
C
/*
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Common routines between Xen store user library and daemon.
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Copyright (C) 2005 Rusty Russell IBM Corporation
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef XENSTORE_LIB_H
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#define XENSTORE_LIB_H
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#include <stddef.h>
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#include <stdbool.h>
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#include <limits.h>
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#include <errno.h>
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#include <stdint.h>
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#include <xen/io/xs_wire.h>
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/* Bitmask of permissions. */
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enum xs_perm_type {
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XS_PERM_NONE = 0,
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XS_PERM_READ = 1,
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XS_PERM_WRITE = 2,
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/* Internal use. */
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XS_PERM_ENOENT_OK = 4,
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XS_PERM_OWNER = 8,
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};
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struct xs_permissions
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{
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unsigned int id;
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enum xs_perm_type perms;
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};
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/* Each 10 bits takes ~ 3 digits, plus one, plus one for nul terminator. */
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#define MAX_STRLEN(x) ((sizeof(x) * CHAR_BIT + CHAR_BIT-1) / 10 * 3 + 2)
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/* Path for various daemon things: env vars can override. */
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const char *xs_daemon_rootdir(void);
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const char *xs_daemon_rundir(void);
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const char *xs_daemon_socket(void);
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const char *xs_daemon_socket_ro(void);
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const char *xs_domain_dev(void);
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const char *xs_daemon_tdb(void);
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/* Simple write function: loops for you. */
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bool xs_write_all(int fd, const void *data, unsigned int len);
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/* Convert strings to permissions. False if a problem. */
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bool xs_strings_to_perms(struct xs_permissions *perms, unsigned int num,
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const char *strings);
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/* Convert permissions to a string (up to len MAX_STRLEN(unsigned int)+1). */
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bool xs_perm_to_string(const struct xs_permissions *perm,
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char *buffer, size_t buf_len);
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/* Given a string and a length, count how many strings (nul terms). */
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unsigned int xs_count_strings(const char *strings, unsigned int len);
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/* Sanitising (quoting) possibly-binary strings. */
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struct expanding_buffer {
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char *buf;
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int avail;
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};
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/* Ensure that given expanding buffer has at least min_avail characters. */
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char *expanding_buffer_ensure(struct expanding_buffer *, int min_avail);
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/* sanitise_value() may return NULL if malloc fails. */
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char *sanitise_value(struct expanding_buffer *, const char *val, unsigned len);
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/* *out_len_r on entry is ignored; out must be at least strlen(in)+1 bytes. */
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void unsanitise_value(char *out, unsigned *out_len_r, const char *in);
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#endif /* XENSTORE_LIB_H */
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