2 * Sherlock Library -- Miscellaneous Functions
4 * (c) 1997--2004 Martin Mares <mj@ucw.cz>
6 * This software may be freely distributed and used according to the terms
7 * of the GNU Lesser General Public License.
11 * This file should be included as the very first include in all
12 * source files, especially before all OS includes since it sets
13 * up libc feature macros.
16 #ifndef _SHERLOCK_LIB_H
17 #define _SHERLOCK_LIB_H
19 #include "lib/config.h"
22 /* Tell libc we're going to use all extensions available */
26 /* Ugly structure handling macros */
28 #define OFFSETOF(s, i) ((unsigned int)&((s *)0)->i)
29 #define SKIP_BACK(s, i, p) ((s *)((char *)p - OFFSETOF(s, i)))
30 #define ALIGN(s, a) (((s)+a-1)&~(a-1))
31 #define UNALIGNED_PART(ptr, type) (((long) (ptr)) % sizeof(type))
33 /* Some other macros */
35 #define MIN(a,b) (((a)<(b))?(a):(b))
36 #define MAX(a,b) (((a)>(b))?(a):(b))
37 #define CLAMP(x,min,max) ({ int _t=x; (_t < min) ? min : (_t > max) ? max : _t; })
38 #define ABS(x) ((x) < 0 ? -(x) : (x))
39 #define ARRAY_SIZE(a) (sizeof(a)/sizeof(*(a)))
40 #define STRINGIFY(x) #x
41 #define GLUE(x,y) x##y
42 #define GLUE_(x,y) x##_##y
43 #define COMPARE(x,y) do { if ((x)<(y)) return -1; if ((x)>(y)) return 1; } while(0)
44 #define REV_COMPARE(x,y) COMPARE(y,x)
48 #define L_DEBUG 'D' /* Debugging messages */
49 #define L_INFO 'I' /* Informational msgs, warnings and errors */
52 #define L_INFO_R 'i' /* Errors caused by external events */
55 #define L_FATAL '!' /* die() */
57 extern char *log_title; /* NULL - print no title, default is log_progname */
58 extern char *log_filename; /* Expanded name of the current log file */
59 extern int log_switch_nest; /* log_switch() nesting counter, increment to disable automatic switches */
60 extern int log_pid; /* 0 if shouldn't be logged */
61 extern void (*log_die_hook)(void);
63 extern void (*log_switch_hook)(struct tm *tm);
65 void log_msg(unsigned int cat, const char *msg, ...) __attribute__((format(printf,2,3)));
67 void vlog_msg(unsigned int cat, const char *msg, va_list args);
68 void die(byte *, ...) NONRET;
69 void log_init(byte *argv0);
70 void log_file(byte *name);
72 void log_switch(void);
75 void assert_failed(char *assertion, char *file, int line) NONRET;
76 #define ASSERT(x) do { if (unlikely(!(x))) assert_failed(#x, __FILE__, __LINE__); } while(0)
78 void assert_failed(void) NONRET;
79 #define ASSERT(x) do { if (__builtin_constant_p(x) && !(x)) assert_failed(); } while(0)
82 #define COMPILE_ASSERT(name,x) typedef char _COMPILE_ASSERT_##name[!!(x)-1]
85 #define DBG(x,y...) log(L_DEBUG, x,##y)
87 #define DBG(x,y...) do { } while(0)
90 static inline void log_switch_disable(void) { log_switch_nest++; }
91 static inline void log_switch_enable(void) { ASSERT(log_switch_nest); log_switch_nest--; }
93 /* Memory allocation */
95 #define xmalloc sh_xmalloc
96 #define xrealloc sh_xrealloc
97 #define xfree sh_xfree
101 * The standard dmalloc macros tend to produce lots of namespace
102 * conflicts and we use only xmalloc and xfree, so we can define
103 * the stubs ourselves.
105 #define DMALLOC_DISABLE
107 #define sh_xmalloc(size) _xmalloc_leap(__FILE__, __LINE__, size)
108 #define sh_xrealloc(ptr,size) _xrealloc_leap(__FILE__, __LINE__, ptr, size)
109 #define sh_xfree(ptr) _xfree_leap(__FILE__, __LINE__, ptr)
112 * Unfortunately, several libraries we might want to link to define
113 * their own xmalloc and we don't want to interfere with them, hence
116 void *xmalloc(unsigned);
117 void *xrealloc(void *, unsigned);
118 #define sh_xfree(x) free(x)
121 void *xmalloc_zero(unsigned);
122 byte *xstrdup(byte *);
124 /* Content-Type pattern matching and filters */
126 int match_ct_patt(byte *, byte *);
134 int sepsplit(byte *str, byte sep, byte **rec, uns max);
135 int wordsplit(byte *, byte **, uns);
137 /* pat(i)match.c: Matching of shell patterns */
139 int match_pattern(byte *, byte *);
140 int match_pattern_nocase(byte *, byte *);
144 void md5_to_hex(byte *, byte *);
145 void hex_to_md5(byte *, byte *);
148 #define MD5_HEX_SIZE 33
157 void init_timer(void);
162 typedef struct regex regex;
164 regex *rx_compile(byte *r, int icase);
165 void rx_free(regex *r);
166 int rx_match(regex *r, byte *s);
167 int rx_subst(regex *r, byte *by, byte *src, byte *dest, uns destlen);
175 void *mmap_file(byte *name, unsigned *len, int writeable);
176 void munmap_file(void *start, unsigned len);
181 struct partmap *partmap_open(byte *name, int writeable);
182 void *partmap_map(struct partmap *p, sh_off_t offset, uns size);
183 void partmap_close(struct partmap *p);
184 sh_off_t partmap_size(struct partmap *p);
188 void setproctitle_init(int argc, char **argv);
189 void setproctitle(char *msg, ...) __attribute__((format(printf,1,2)));
193 void randomkey(byte *buf, uns size);
197 #define EXIT_STATUS_MSG_SIZE 32
198 int format_exit_status(byte *msg, int stat);
202 int run_command(byte *cmd, ...);
203 void NONRET exec_command(byte *cmd, ...);
204 void echo_command(byte *buf, int size, byte *cmd, ...);
205 int run_command_v(byte *cmd, va_list args);
206 void NONRET exec_command_v(byte *cmd, va_list args);
207 void echo_command_v(byte *buf, int size, byte *cmd, va_list args);
211 int careful_read(int fd, void *buf, int len);
212 int careful_write(int fd, void *buf, int len);
216 void sync_dir(byte *name);
220 typedef int (*sh_sighandler_t)(int);
221 /* obtains signum, returns nonzero if abort() should be called */
222 extern sh_sighandler_t signal_handler[];
225 void handle_signal(int signum, struct sigaction *oldact);
226 void unhandle_signal(int signum, struct sigaction *oldact);