aboutsummaryrefslogtreecommitdiff
path: root/lib/lib.h
blob: 8e6514a86bd90c6588b748c03bf718f34411c7ea (plain)
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
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
/* lib.h - header file for lib directory
 *
 * Copyright 2006 Rob Landley <rob@landley.net>
 */

struct ptr_len {
  void *ptr;
  long len;
};

struct str_len {
  char *str;
  long len;
};

// llist.c

// All these list types can be handled by the same code because first element
// is always next pointer, so next = (mytype *)&struct. (The payloads are
// named differently to catch using the wrong type early.)

struct string_list {
  struct string_list *next;
  char str[0];
};

struct arg_list {
  struct arg_list *next;
  char *arg;
};

struct double_list {
  struct double_list *next, *prev;
  char *data;
};

struct num_cache {
  struct num_cache *next;
  long long num;
  char data[];
};

void llist_free_arg(void *node);
void llist_free_double(void *node);
void llist_traverse(void *list, void (*using)(void *node));
void *llist_pop(void *list);  // actually void **list
void *dlist_pop(void *list);  // actually struct double_list **list
void dlist_add_nomalloc(struct double_list **list, struct double_list *new);
struct double_list *dlist_add(struct double_list **list, char *data);
void *dlist_terminate(void *list);
struct num_cache *get_num_cache(struct num_cache *cache, long long num);
struct num_cache *add_num_cache(struct num_cache **cache, long long num,
  void *data, int len);

// args.c
#define FLAGS_NODASH (1LL<<63)
void get_optflags(void);

// dirtree.c

// Values returnable from callback function (bitfield, or them together)
// Default with no callback is 0

// Add this node to the tree
#define DIRTREE_SAVE         1
// Recurse into children
#define DIRTREE_RECURSE      2
// Call again after handling all children of this directory
// (Ignored for non-directories, sets linklen = -1 before second call.)
#define DIRTREE_COMEAGAIN    4
// Follow symlinks to directories
#define DIRTREE_SYMFOLLOW    8
// Don't warn about failure to stat
#define DIRTREE_SHUTUP      16
// Breadth first traversal, conserves filehandles at the expense of memory
#define DIRTREE_BREADTH     32
// skip non-numeric entries
#define DIRTREE_PROC        64
// Don't look at any more files in this directory.
#define DIRTREE_ABORT      256

#define DIRTREE_ABORTVAL ((struct dirtree *)1)

struct dirtree {
  struct dirtree *next, *parent, *child;
  long extra; // place for user to store their stuff (can be pointer)
  struct stat st;
  char *symlink;
  int dirfd;
  char again;
  char name[];
};

int isdotdot(char *name);
struct dirtree *dirtree_add_node(struct dirtree *p, char *name, int flags);
char *dirtree_path(struct dirtree *node, int *plen);
int dirtree_notdotdot(struct dirtree *catch);
int dirtree_parentfd(struct dirtree *node);
int dirtree_recurse(struct dirtree *node, int (*callback)(struct dirtree *node),
  int dirfd, int symfollow);
struct dirtree *dirtree_flagread(char *path, int flags,
  int (*callback)(struct dirtree *node));
struct dirtree *dirtree_read(char *path, int (*callback)(struct dirtree *node));

// help.c

void show_help(FILE *out);

// Tell xopen and friends to print warnings but return -1 as necessary
// The largest O_BLAH flag so far is arch/alpha's O_PATH at 0x800000 so
// plenty of headroom.
#define WARN_ONLY (1<<31)

// xwrap.c
void xstrncpy(char *dest, char *src, size_t size);
void xstrncat(char *dest, char *src, size_t size);
void _xexit(void) __attribute__((__noreturn__));
void xexit(void) __attribute__((__noreturn__));
void *xmmap(void *addr, size_t length, int prot, int flags, int fd, off_t off);
void *xmalloc(size_t size);
void *xzalloc(size_t size);
void *xrealloc(void *ptr, size_t size);
char *xstrndup(char *s, size_t n);
char *xstrdup(char *s);
void *xmemdup(void *s, long len);
char *xmprintf(char *format, ...) printf_format;
void xprintf(char *format, ...) printf_format;
void xputsl(char *s, int len);
void xputsn(char *s);
void xputs(char *s);
void xputc(char c);
void xflush(void);
void xexec(char **argv);
pid_t xpopen_both(char **argv, int *pipes);
int xwaitpid(pid_t pid);
int xpclose_both(pid_t pid, int *pipes);
pid_t xpopen(char **argv, int *pipe, int isstdout);
pid_t xpclose(pid_t pid, int pipe);
int xrun(char **argv);
int xpspawn(char **argv, int*pipes);
void xaccess(char *path, int flags);
void xunlink(char *path);
void xrename(char *from, char *to);
int xtempfile(char *name, char **tempname);
int xcreate(char *path, int flags, int mode);
int xopen(char *path, int flags);
int xcreate_stdio(char *path, int flags, int mode);
int xopen_stdio(char *path, int flags);
int openro(char *path, int flags);
int xopenro(char *path);
void xpipe(int *pp);
void xclose(int fd);
int xdup(int fd);
int notstdio(int fd);
FILE *xfdopen(int fd, char *mode);
FILE *xfopen(char *path, char *mode);
size_t xread(int fd, void *buf, size_t len);
void xreadall(int fd, void *buf, size_t len);
void xwrite(int fd, void *buf, size_t len);
off_t xlseek(int fd, off_t offset, int whence);
char *xreadfile(char *name, char *buf, off_t len);
int xioctl(int fd, int request, void *data);
char *xgetcwd(void);
void xstat(char *path, struct stat *st);
char *xabspath(char *path, int exact);
void xchdir(char *path);
void xchroot(char *path);
struct passwd *xgetpwuid(uid_t uid);
struct group *xgetgrgid(gid_t gid);
struct passwd *xgetpwnam(char *name);
struct group *xgetgrnam(char *name);
unsigned xgetuid(char *name);
unsigned xgetgid(char *name);
void xsetuser(struct passwd *pwd);
char *xreadlink(char *name);
double xstrtod(char *s);
long xparsetime(char *arg, long units, long *fraction);
long long xparsemillitime(char *arg);
void xpidfile(char *name);
void xregcomp(regex_t *preg, char *rexec, int cflags);
char *xtzset(char *new);
void xsignal_flags(int signal, void *handler, int flags);
void xsignal(int signal, void *handler);
time_t xvali_date(struct tm *tm, char *str);
void xparsedate(char *str, time_t *t, unsigned *nano, int endian);

// lib.c
void verror_msg(char *msg, int err, va_list va);
void error_msg(char *msg, ...) printf_format;
void perror_msg(char *msg, ...) printf_format;
void error_exit(char *msg, ...) printf_format __attribute__((__noreturn__));
void perror_exit(char *msg, ...) printf_format __attribute__((__noreturn__));
void help_exit(char *msg, ...) printf_format __attribute__((__noreturn__));
void error_msg_raw(char *msg);
void perror_msg_raw(char *msg);
void error_exit_raw(char *msg);
void perror_exit_raw(char *msg);
ssize_t readall(int fd, void *buf, size_t len);
ssize_t writeall(int fd, void *buf, size_t len);
off_t lskip(int fd, off_t offset);
#define MKPATHAT_MKLAST  1
#define MKPATHAT_MAKE    2
#define MKPATHAT_VERBOSE 4
int mkpathat(int atfd, char *dir, mode_t lastmode, int flags);
int mkpath(char *dir);
struct string_list **splitpath(char *path, struct string_list **list);
char *readfileat(int dirfd, char *name, char *buf, off_t *len);
char *readfile(char *name, char *buf, off_t len);
void msleep(long milliseconds);
void nanomove(struct timespec *ts, long long offset);
long long nanodiff(struct timespec *old, struct timespec *new);
int highest_bit(unsigned long l);
int64_t peek_le(void *ptr, unsigned size);
int64_t peek_be(void *ptr, unsigned size);
int64_t peek(void *ptr, unsigned size);
void poke_le(void *ptr, long long val, unsigned size);
void poke_be(void *ptr, long long val, unsigned size);
void poke(void *ptr, long long val, unsigned size);
struct string_list *find_in_path(char *path, char *filename);
long long estrtol(char *str, char **end, int base);
long long xstrtol(char *str, char **end, int base);
long long atolx(char *c);
long long atolx_range(char *numstr, long long low, long long high);
int stridx(char *haystack, char needle);
int utf8towc(wchar_t *wc, char *str, unsigned len);
char *strlower(char *s);
char *strafter(char *haystack, char *needle);
char *chomp(char *s);
int unescape(char c);
char *strend(char *str, char *suffix);
int strstart(char **a, char *b);
off_t fdlength(int fd);
void loopfiles_rw(char **argv, int flags, int permissions,
  void (*function)(int fd, char *name));
void loopfiles(char **argv, void (*function)(int fd, char *name));
void loopfiles_lines(char **argv, void (*function)(char **pline, long len));
long long sendfile_len(int in, int out, long long len);
long long xsendfile_len(int in, int out, long long len);
void xsendfile_pad(int in, int out, long long len);
long long xsendfile(int in, int out);
int wfchmodat(int rc, char *name, mode_t mode);
int copy_tempfile(int fdin, char *name, char **tempname);
void delete_tempfile(int fdin, int fdout, char **tempname);
void replace_tempfile(int fdin, int fdout, char **tempname);
void crc_init(unsigned int *crc_table, int little_endian);
void base64_init(char *p);
int yesno(int def);
int qstrcmp(const void *a, const void *b);
void create_uuid(char *uuid);
char *show_uuid(char *uuid);
char *next_printf(char *s, char **start);
int dev_minor(int dev);
int dev_major(int dev);
int dev_makedev(int major, int minor);
struct passwd *bufgetpwuid(uid_t uid);
struct group *bufgetgrgid(gid_t gid);
int readlinkat0(int dirfd, char *path, char *buf, int len);
int readlink0(char *path, char *buf, int len);
int regexec0(regex_t *preg, char *string, long len, int nmatch,
  regmatch_t pmatch[], int eflags);
char *getusername(uid_t uid);
char *getgroupname(gid_t gid);
void do_lines(int fd, char delim, void (*call)(char **pline, long len));
long environ_bytes();
long long millitime(void);
char *format_iso_time(char *buf, size_t len, struct timespec *ts);
void reset_env(struct passwd *p, int clear);
void loggit(int priority, char *format, ...);

#define HR_SPACE 1 // Space between number and units
#define HR_B     2 // Use "B" for single byte units
#define HR_1000  4 // Use decimal instead of binary units
int human_readable(char *buf, unsigned long long num, int style);

// linestack.c

struct linestack {
  long len, max;
  struct ptr_len idx[];
};

void linestack_addstack(struct linestack **lls, struct linestack *throw,
  long pos);
void linestack_insert(struct linestack **lls, long pos, char *line, long len);
void linestack_append(struct linestack **lls, char *line);
struct linestack *linestack_load(char *name);
int crunch_escape(FILE *out, int cols, int wc);
int crunch_rev_escape(FILE *out, int cols, int wc);
int crunch_str(char **str, int width, FILE *out, char *escmore,
  int (*escout)(FILE *out, int cols, int wc));
int draw_str(char *start, int width);
int utf8len(char *str);
int utf8skip(char *str, int width);
int draw_trim_esc(char *str, int padto, int width, char *escmore,
  int (*escout)(FILE *out, int cols,int wc));
int draw_trim(char *str, int padto, int width);

// interestingtimes.c
int tty_fd(void);
int terminal_size(unsigned *xx, unsigned *yy);
int terminal_probesize(unsigned *xx, unsigned *yy);
int scan_key_getsize(char *scratch, int timeout_ms, unsigned *xx, unsigned *yy);
int set_terminal(int fd, int raw, int speed, struct termios *old);
void xset_terminal(int fd, int raw, int speed, struct termios *old);
int scan_key(char *scratch, int timeout_ms);
void tty_esc(char *s);
void tty_jump(int x, int y);
void tty_reset(void);
void tty_sigreset(int i);
void start_redraw(unsigned *width, unsigned *height);

// net.c

union socksaddr {
  struct sockaddr s;
  struct sockaddr_in in;
  struct sockaddr_in6 in6;
};

int xsocket(int domain, int type, int protocol);
void xsetsockopt(int fd, int level, int opt, void *val, socklen_t len);
struct addrinfo *xgetaddrinfo(char *host, char *port, int family, int socktype,
  int protocol, int flags);
int xconnect(struct addrinfo *ai);
int xbind(struct addrinfo *ai);
int xpoll(struct pollfd *fds, int nfds, int timeout);
int pollinate(int in1, int in2, int out1, int out2, int timeout, int shutdown_timeout);
char *ntop(struct sockaddr *sa);
void xsendto(int sockfd, void *buf, size_t len, struct sockaddr *dest);
int xrecvwait(int fd, char *buf, int len, union socksaddr *sa, int timeout);

// password.c
int get_salt(char *salt, char * algo);

// commas.c
void comma_args(struct arg_list *al, void *data, char *err,
  char *(*callback)(void *data, char *str, int len));
void comma_collate(char **old, char *new);
char *comma_iterate(char **list, int *len);
int comma_scan(char *optlist, char *opt, int clean);
int comma_scanall(char *optlist, char *scanlist);

// deflate.c

long long gzip_fd(int infd, int outfd);
long long gunzip_fd(int infd, int outfd);

// getmountlist.c
struct mtab_list {
  struct mtab_list *next, *prev;
  struct stat stat;
  struct statvfs statvfs;
  char *dir;
  char *device;
  char *opts;
  char type[0];
};

int mountlist_istype(struct mtab_list  *ml, char *typelist);
struct mtab_list *xgetmountlist(char *path);

// signal

void generic_signal(int signal);
void exit_signal(int signal);
void sigatexit(void *handler);
int sig_to_num(char *pidstr);
char *num_to_sig(int sig);

mode_t string_to_mode(char *mode_str, mode_t base);
void mode_to_string(mode_t mode, char *buf);
char *getdirname(char *name);
char *getbasename(char *name);
int fileunderdir(char *file, char *dir);
void names_to_pid(char **names, int (*callback)(pid_t pid, char *name));

pid_t __attribute__((returns_twice)) xvforkwrap(pid_t pid);
#define XVFORK() xvforkwrap(vfork())

// Wrapper to make xfuncs() return (via siglongjmp) instead of exiting.
// Assigns true/false "did it exit" value to first argument.
#define WOULD_EXIT(y, x) do { sigjmp_buf _noexit; \
  int _noexit_res; \
  toys.rebound = &_noexit; \
  _noexit_res = sigsetjmp(_noexit, 1); \
  if (!_noexit_res) do {x;} while(0); \
  toys.rebound = 0; \
  y = _noexit_res; \
} while(0)

// Wrapper that discards true/false "did it exit" value.
#define NOEXIT(x) WOULD_EXIT(_noexit_res, x)

#define minof(a, b) ({typeof(a) aa = (a); typeof(b) bb = (b); aa<bb ? aa : bb;})
#define maxof(a, b) ({typeof(a) aa = (a); typeof(b) bb = (b); aa>bb ? aa : bb;})

// Functions in need of further review/cleanup
#include "lib/pending.h"