lib/lib.h

/* lib.h - header file for lib directory
 *
 * Copyright 2006 Rob Landley <rob@landley.net>
 */

// 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;
};

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);

// args.c
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 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 data;  // dirfd for directory, linklen for symlink, -1 = comeagain
  char name[];
};

struct dirtree *dirtree_add_node(struct dirtree *p, char *name, int symfollow);
char *dirtree_path(struct dirtree *node, int *plen);
int dirtree_notdotdot(struct dirtree *catch);
int dirtree_parentfd(struct dirtree *node);
struct dirtree *dirtree_handle_callback(struct dirtree *new,
  int (*callback)(struct dirtree *node));
void dirtree_recurse(struct dirtree *node,
  int (*callback)(struct dirtree *node), int symfollow);
struct dirtree *dirtree_read(char *path, int (*callback)(struct dirtree *node));

// help.c

void show_help(void);

// xwrap.c
void xstrncpy(char *dest, char *src, size_t size);
void xexit(void) noreturn;
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);
char *xmprintf(char *format, ...);
void xprintf(char *format, ...);
void xputs(char *s);
void xputc(char c);
void xflush(void);
void xexec_optargs(int skip);
void xexec(char **argv);
void xaccess(char *path, int flags);
void xunlink(char *path);
int xcreate(char *path, int flags, int mode);
int xopen(char *path, int flags);
void xclose(int fd);
int xdup(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);
char *xrealpath(char *path);
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);
void xsetuser(struct passwd *pwd);
char *xreadlink(char *name);
long xparsetime(char *arg, long units, long *fraction);
void xpidfile(char *name);
void xregcomp(regex_t *preg, char *rexec, int cflags);

// lib.c
void verror_msg(char *msg, int err, va_list va);
void error_msg(char *msg, ...);
void perror_msg(char *msg, ...);
void error_exit(char *msg, ...) noreturn;
void perror_exit(char *msg, ...) noreturn;
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);
int mkpathat(int atfd, char *dir, mode_t lastmode, int flags);
struct string_list **splitpath(char *path, struct string_list **list);
char *readfile(char *name, char *buf, off_t len);
void msleep(long miliseconds);
int64_t peek(void *ptr, int size);
void poke(void *ptr, uint64_t val, int size);
struct string_list *find_in_path(char *path, char *filename);
long atolx(char *c);
long atolx_range(char *numstr, long low, long high);
int numlen(long l);
int stridx(char *haystack, char needle);
off_t fdlength(int fd);
void loopfiles_rw(char **argv, int flags, int permissions, int failok,
  void (*function)(int fd, char *name));
void loopfiles(char **argv, void (*function)(int fd, char *name));
char *get_rawline(int fd, long *plen, char end);
char *get_line(int fd);
void 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);
int terminal_size(unsigned *x, unsigned *y);
int yesno(char *prompt, int def);
int human_readable(char *buf, unsigned long long num);

// net.c
int xsocket(int domain, int type, int protocol);

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

struct mtab_list *xgetmountlist(char *path);

// 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);
void names_to_pid(char **names, int (*callback)(pid_t pid, char *name));

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