fd.c: Avoid gcc warning regarding fchdir().
[adu.git] / adu.h
1 /*
2 * Copyright (C) 2008 Andre Noll <maan@tuebingen.mpg.de>
3 *
4 * Licensed under the GPL v2. For licencing details see COPYING.
5 */
6
7 /** \file adu.h \brief Global definitions. */
8
9 #include <sys/stat.h>
10 #include <fcntl.h>
11 #include <signal.h>
12 #include <stdio.h>
13 #include <stdlib.h>
14 #include <time.h> /* time(), localtime() */
15 #include <unistd.h>
16 #include <errno.h>
17 #include <limits.h>
18 #include <stdarg.h>
19 #include <inttypes.h>
20 #include <string.h>
21 #include <assert.h>
22 #include <osl.h>
23 #include "gcc-compat.h"
24 #include "portable_io.h"
25
26 /** debug loglevel, gets really noisy */
27 #define DEBUG 1
28 /** still noisy, but won't fill your disk */
29 #define INFO 2
30 /** normal, but significant event */
31 #define NOTICE 3
32 /** unexpected event that can be handled */
33 #define WARNING 4
34 /** unhandled error condition */
35 #define ERROR 5
36 /** system might be unreliable */
37 #define CRIT 6
38 /** last message before exit */
39 #define EMERG 7
40
41 /** Log messages with lower priority than that will not be compiled in. */
42 #define COMPILE_TIME_LOGLEVEL 0
43
44 /** \cond */
45 #if DEBUG > COMPILE_TIME_LOGLEVEL
46 #define DEBUG_LOG(f,...) __log(DEBUG, "%s: " f, __FUNCTION__, ## __VA_ARGS__)
47 #else
48 #define DEBUG_LOG(...) do {;} while (0)
49 #endif
50
51 #if INFO > COMPILE_TIME_LOGLEVEL
52 #define INFO_LOG(f,...) __log(INFO, "%s: " f, __FUNCTION__, ## __VA_ARGS__)
53 #else
54 #define INFO_LOG(...) do {;} while (0)
55 #endif
56
57 #if NOTICE > COMPILE_TIME_LOGLEVEL
58 #define NOTICE_LOG(f,...) __log(NOTICE, "%s: " f, __FUNCTION__, ## __VA_ARGS__)
59 #else
60 #define NOTICE_LOG(...) do {;} while (0)
61 #endif
62
63 #if WARNING > COMPILE_TIME_LOGLEVEL
64 #define WARNING_LOG(f,...) __log(WARNING, "%s: " f, __FUNCTION__, ## __VA_ARGS__)
65 #else
66 #define WARNING_LOG(...) do {;} while (0)
67 #endif
68
69 #if ERROR > COMPILE_TIME_LOGLEVEL
70 #define ERROR_LOG(f,...) __log(ERROR, "%s: " f, __FUNCTION__, ## __VA_ARGS__)
71 #else
72 #define ERROR_LOG(...) do {;} while (0)
73 #endif
74
75 #if CRIT > COMPILE_TIME_LOGLEVEL
76 #define CRIT_LOG(f,...) __log(CRIT, "%s: " f, __FUNCTION__, ## __VA_ARGS__)
77 #else
78 #define CRIT_LOG(...) do {;} while (0)
79 #endif
80
81 #if EMERG > COMPILE_TIME_LOGLEVEL
82 #define EMERG_LOG(f,...) __log(EMERG, "%s: " f, __FUNCTION__, ## __VA_ARGS__)
83 #else
84 #define EMERG_LOG(...)
85 #endif
86 /** \endcond */
87
88 /** Evaluates to 1 if x < y, to -1 if x > y and to 0 if x == y. */
89 #define NUM_COMPARE(x, y) ((int)((x) < (y)) - (int)((x) > (y)))
90
91 /** The columns of the directory table. */
92 enum dir_table_columns {
93 /** The name of the directory. */
94 DT_NAME,
95 /** The dir count number. */
96 DT_NUM,
97 /** The number of the parent directory. */
98 DT_PARENT_NUM,
99 /** The number of bytes of all regular files. */
100 DT_BYTES,
101 /** The number of all regular files. */
102 DT_FILES,
103 /** Number of columns in this table. */
104 NUM_DT_COLUMNS
105 };
106
107 extern struct osl_table *dir_table;
108
109 /** The adu command line options. */
110 extern struct gengetopt_args_info conf;
111
112 /** Computed database dir. */
113 extern char *database_dir;
114
115 /**
116 * The select command line options.
117 *
118 * Either given at the command line, or via the \a set command
119 * in interactive mode.
120 */
121 extern struct select_args_info select_conf;
122
123 /**
124 * Compare two osl objects pointing to unsigned integers of 64 bit size.
125 *
126 * \param obj1 Pointer to the first integer.
127 * \param obj2 Pointer to the second integer.
128 *
129 * \return The values required for an osl compare function.
130 *
131 * \sa osl_compare_func, osl_hash_compare().
132 */
133 _static_inline_ int uint64_compare(const struct osl_object *obj1,
134 const struct osl_object *obj2)
135 {
136 uint64_t d1 = read_u64((const char *)obj1->data);
137 uint64_t d2 = read_u64((const char *)obj2->data);
138
139 if (d1 < d2)
140 return 1;
141 if (d1 > d2)
142 return -1;
143 return 0;
144 }
145
146 /**
147 * Compare the size of two directories
148 *
149 * \param obj1 Pointer to the first object.
150 * \param obj2 Pointer to the second object.
151 *
152 * This function first compares the size values as usual integers. If they compare as
153 * equal, the address of \a obj1 and \a obj2 are compared. So this compare function
154 * returns zero if and only if \a obj1 and \a obj2 point to the same memory area.
155 */
156 _static_inline_ int size_compare(const struct osl_object *obj1, const struct osl_object *obj2)
157 {
158 uint64_t d1 = *(uint64_t *)obj1->data;
159 uint64_t d2 = *(uint64_t *)obj2->data;
160 int ret = NUM_COMPARE(d2, d1);
161
162 if (ret)
163 return ret;
164 //INFO_LOG("addresses: %p, %p\n", obj1->data, obj2->data);
165 return NUM_COMPARE(obj2->data, obj1->data);
166 }
167
168 /* adu.c */
169 __printf_2_3 void __log(int, const char*, ...);
170 int open_dir_table(int create);
171 void check_signals(void);
172 /* create.c */
173 int com_create(void);
174
175 /* interactive.c */
176 void print_interactive_help(void);
177 int com_interactive(void);