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haiku/headers/posix/unistd.h
Ingo Weinhold 360be1fc45 * Implemented support for chroot: 
- Added a "root" vnode to the io_context. It is used for resolving
    paths and converting nodes to paths instead of sRoot. Some more
    passing around of io_context structures was necessary.
  - Introduced a new lock sIOContextRootLock to protect
    io_context::root. The current uses of io_context::io_mutex
    (put_vnode(), remove_vnode() while holding it) looked too suspicious
    to use that mutex in vnode_path_to_vnode().
  - Added _kern_change_root() syscall and chroot() libroot function.
  - Added chroot coreutils program to the image. Funnily it seems to be
    much easier to set up a little jail than under Linux (just copy
    bash and libroot.so into respective subdirs; mount another pipefs
    if you want pipe support).
    With Haiku allowing direct access to directories via inode IDs
    jailing is obviously not very secure at the moment.
  - Added /var/empty to the image. It will be the chroot target for ssh.
* Changed vfs.cpp:get_cwd() so that the io_context::io_mutex is no
  longer held when calling dir_vnode_to_path().


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@24673 a95241bf-73f2-0310-859d-f6bbb57e9c96
2008-03-30 05:59:54 +00:00

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/*
* Copyright 2004-2008, Haiku Inc. All Rights Reserved.
* Distributed under the terms of the MIT License.
*/
#ifndef _UNISTD_H_
#define _UNISTD_H_
#include <null.h>
#include <sys/types.h>
/* access modes */
#define R_OK 4
#define W_OK 2
#define X_OK 1
#define F_OK 0
/* standard file descriptors */
#define STDIN_FILENO 0
#define STDOUT_FILENO 1
#define STDERR_FILENO 2
/* function arguments needed by lockf() */
#define F_ULOCK 0 /* unlock locked sections */
#define F_LOCK 1 /* lock a section for exclusive use */
#define F_TLOCK 2 /* test and lock a section for exclusive use */
#define F_TEST 3 /* test a section for locks by other processes */
/* POSIX version support */
#define _POSIX_VERSION (199009L)
/* pathconf() constants */
#define _PC_CHOWN_RESTRICTED 1
#define _PC_MAX_CANON 2
#define _PC_MAX_INPUT 3
#define _PC_NAME_MAX 4
#define _PC_NO_TRUNC 5
#define _PC_PATH_MAX 6
#define _PC_PIPE_BUF 7
#define _PC_VDISABLE 8
#define _PC_LINK_MAX 25
#define _POSIX_CHOWN_RESTRICTED 9
#define _POSIX_JOB_CONTROL 10
#define _POSIX_NO_TRUNC 11
#define _POSIX_SAVED_IDS 12
#define _POSIX_VDISABLE ((cc_t) - 2)
/* sysconf() constants */
#define _SC_ARG_MAX 15
#define _SC_CHILD_MAX 16
#define _SC_CLK_TCK 17
#define _SC_JOB_CONTROL 18
#define _SC_NGROUPS_MAX 19
#define _SC_OPEN_MAX 20
#define _SC_SAVED_IDS 21
#define _SC_STREAM_MAX 22
#define _SC_TZNAME_MAX 23
#define _SC_VERSION 24
/* lseek() constants */
#ifndef SEEK_SET
# define SEEK_SET 0
#endif
#ifndef SEEK_CUR
# define SEEK_CUR 1
#endif
#ifndef SEEK_END
# define SEEK_END 2
#endif
#ifdef __cplusplus
extern "C" {
#endif
/* file functions */
extern int access(const char *path, int accessMode);
extern int chdir(const char *path);
extern int fchdir(int fd);
extern char *getcwd(char *buffer, size_t size);
extern int pipe(int fildes[2]);
extern int dup(int fd);
extern int dup2(int fd1, int fd2);
extern int close(int fd);
extern int link(const char *name, const char *new_name);
extern int unlink(const char *name);
extern int rmdir(const char *path);
extern ssize_t readlink(const char *path, char *buffer, size_t bufferSize);
extern int symlink(const char *from, const char *to);
extern int ftruncate(int fd, off_t newSize);
extern int truncate(const char *path, off_t newSize);
extern int ioctl(int fd, unsigned long op, ...);
extern ssize_t read(int fd, void *buffer, size_t count);
extern ssize_t read_pos(int fd, off_t pos, void *buffer, size_t count);
extern ssize_t pread(int fd, void *buffer, size_t count, off_t pos);
extern ssize_t write(int fd, const void *buffer, size_t count);
extern ssize_t write_pos(int fd, off_t pos, const void *buffer,size_t count);
extern ssize_t pwrite(int fd, const void *buffer, size_t count, off_t pos);
extern off_t lseek(int fd, off_t offset, int whence);
extern int sync(void);
extern int fsync(int fd);
extern int chown(const char *path, uid_t owner, gid_t group);
extern int fchown(int fd, uid_t owner, gid_t group);
extern int lchown(const char *path, uid_t owner, gid_t group);
extern int mknod(const char *name, mode_t mode, dev_t dev);
extern int getdtablesize(void);
extern long sysconf(int name);
extern long fpathconf(int fd, int name);
extern long pathconf(const char *path, int name);
extern size_t confstr(int name, char *buf, size_t len);
extern int lockf(int fd, int function, off_t size);
/* process functions */
extern pid_t fork(void);
extern pid_t vfork(void);
extern int execve(const char *path, char * const argv[], char * const envp[]);
extern int execl(const char *path, const char *arg, ...);
extern int execv(const char *path, char *const *argv);
extern int execlp(const char *file, const char *arg, ...);
extern int execle(const char *path, const char *arg , ... /*, char **envp */);
extern int exect(const char *path, char *const *argv);
extern int execvp(const char *file, char *const *argv);
extern void _exit(int status);
extern pid_t tcgetpgrp(int fd);
extern int tcsetpgrp(int fd, pid_t pgrpid);
extern void *sbrk(long incr);
extern unsigned int alarm(unsigned int seconds);
extern useconds_t ualarm(useconds_t microSeconds, useconds_t interval);
extern unsigned int sleep(unsigned int seconds);
extern int usleep(unsigned int microSeconds);
extern clock_t clock(void);
extern int pause(void);
/* process */
extern pid_t getpid(void);
extern pid_t getpgrp(void);
extern pid_t getppid(void);
extern pid_t getsid(pid_t pid);
extern pid_t getpgid(pid_t pid);
extern pid_t setsid(void);
extern int setpgid(pid_t pid, pid_t pgid);
extern pid_t setpgrp(void);
extern int chroot(const char *path);
/* access permissions */
extern gid_t getegid(void);
extern uid_t geteuid(void);
extern gid_t getgid(void);
extern uid_t getuid(void);
extern int setgid(gid_t gid);
extern int setuid(uid_t uid);
extern int setegid(gid_t gid);
extern int seteuid(uid_t uid);
extern int setregid(gid_t rgid, gid_t egid);
extern int setreuid(uid_t ruid, uid_t euid);
extern int getgrouplist(const char* user, gid_t baseGroup,
gid_t* groupList, int* groupCount);
extern int getgroups(int groupCount, gid_t groupList[]);
extern int initgroups(const char* user, gid_t baseGroup);
extern int setgroups(int groupCount, const gid_t* groupList);
extern char *getlogin(void);
extern int getlogin_r(char *name, size_t nameSize);
/* host name */
extern int sethostname(const char *hostName, size_t nameSize);
extern int gethostname(char *hostName, size_t nameSize);
/* tty */
extern int isatty(int fd);
extern char *ttyname(int fd);
extern int ttyname_r(int fd, char *buffer, size_t bufferSize);
/* misc */
extern char *crypt(const char *key, const char *salt);
extern void encrypt(char block[64], int edflag);
extern int getopt(int argc, char *const *argv, const char *shortOpts);
extern void swab(const void *src, void *dest, ssize_t nbytes);
/* getopt() related external variables */
extern char *optarg;
extern int optind, opterr, optopt;
// ToDo: should be moved to stdlib.h
extern char **environ;
#ifdef __cplusplus
}
#endif
#endif /* _UNISTD_H_ */
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