/usr/include/xentoollog.h is in libxen-dev 4.4.1-9+deb8u10.
This file is owned by root:root, with mode 0o644.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 | /*
* xentoollog.h
*
* Copyright (c) 2010 Citrix
* Part of a generic logging interface used by various dom0 userland libraries.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation;
* version 2.1 of the License.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef XENTOOLLOG_H
#define XENTOOLLOG_H
#include <stdio.h>
#include <stdarg.h>
/*---------- common declarations and types ----------*/
typedef enum xentoollog_level {
XTL_NONE, /* sentinel etc, never used for logging */
XTL_DEBUG,
XTL_VERBOSE,
XTL_DETAIL,
XTL_PROGRESS, /* also used for "progress" messages */
XTL_INFO,
XTL_NOTICE,
XTL_WARN,
XTL_ERROR,
XTL_CRITICAL,
XTL_NUM_LEVELS
} xentoollog_level;
typedef struct xentoollog_logger xentoollog_logger;
struct xentoollog_logger {
void (*vmessage)(struct xentoollog_logger *logger,
xentoollog_level level,
int errnoval /* or -1 */,
const char *context /* eg "xc", "xl", may be 0 */,
const char *format /* without level, context, \n */,
va_list al)
__attribute__((format(printf,5,0)));
void (*progress)(struct xentoollog_logger *logger,
const char *context /* see above */,
const char *doing_what /* no \r,\n */,
int percent, unsigned long done, unsigned long total)
/* null function pointer is ok.
* will always be called with done==0 for each new
* context/doing_what */;
void (*destroy)(struct xentoollog_logger *logger);
/* each logger can put its necessary data here */
};
/*---------- facilities for consuming log messages ----------*/
#define XTL_STDIOSTREAM_SHOW_PID 01u
#define XTL_STDIOSTREAM_SHOW_DATE 02u
#define XTL_STDIOSTREAM_HIDE_PROGRESS 04u
typedef struct xentoollog_logger_stdiostream xentoollog_logger_stdiostream;
xentoollog_logger_stdiostream *xtl_createlogger_stdiostream
(FILE *f, xentoollog_level min_level, unsigned flags);
/* may return 0 if malloc fails, in which case error was logged */
/* destroy on this logger does not close the file */
void xtl_stdiostream_set_minlevel(xentoollog_logger_stdiostream*,
xentoollog_level min_level);
void xtl_stdiostream_adjust_flags(xentoollog_logger_stdiostream*,
unsigned set_flags, unsigned clear_flags);
/* if set_flags and clear_flags overlap, set_flags takes precedence */
void xtl_logger_destroy(struct xentoollog_logger *logger /* 0 is ok */);
/*---------- facilities for generating log messages ----------*/
void xtl_logv(struct xentoollog_logger *logger,
xentoollog_level level,
int errnoval /* or -1 */,
const char *context /* eg "xc", "xenstore", "xl", may be 0 */,
const char *format /* does not contain \n */,
va_list) __attribute__((format(printf,5,0)));
void xtl_log(struct xentoollog_logger *logger,
xentoollog_level level,
int errnoval /* or -1 */,
const char *context /* eg "xc", "xenstore", "xl" */,
const char *format /* does not contain \n */,
...) __attribute__((format(printf,5,6)));
void xtl_progress(struct xentoollog_logger *logger,
const char *context /* see above, may be 0 */,
const char *doing_what,
unsigned long done, unsigned long total);
/*---------- facilities for defining log message consumers ----------*/
const char *xtl_level_to_string(xentoollog_level); /* never fails */
#define XTL_NEW_LOGGER(LOGGER,buffer) ({ \
xentoollog_logger_##LOGGER *new_consumer; \
\
(buffer).vtable.vmessage = LOGGER##_vmessage; \
(buffer).vtable.progress = LOGGER##_progress; \
(buffer).vtable.destroy = LOGGER##_destroy; \
\
new_consumer = malloc(sizeof(*new_consumer)); \
if (!new_consumer) { \
xtl_log((xentoollog_logger*)&buffer, \
XTL_CRITICAL, errno, "xtl", \
"failed to allocate memory for new message logger"); \
} else { \
*new_consumer = buffer; \
} \
\
new_consumer; \
});
#endif /* XENTOOLLOG_H */
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