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posix-next API 0.1.0
Out-of-tree Zephyr POSIX module
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posix-next API 0.1.0
Out-of-tree Zephyr POSIX module
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POSIX symbolic constants and miscellaneous functions (<unistd.h>) More...
#include "posix_features.h"#include <stddef.h>#include <stdint.h>#include <zephyr/posix/sys/confstr.h>#include <zephyr/posix/sys/pathconf.h>#include <zephyr/posix/sys/sysconf.h>#include <zephyr/toolchain.h>
Go to the source code of this file.
Macros | |
| #define | F_OK 0 |
| Test whether the file exists. | |
| #define | R_OK 4 |
| Test whether the file may be read. | |
| #define | W_OK 2 |
| Test whether the file may be written. | |
| #define | X_OK 1 |
| Test whether the file may be executed. | |
| #define | SEEK_CUR 1 |
| Seek relative to the current file offset. | |
| #define | SEEK_END 2 |
| Seek relative to the end of the file. | |
| #define | SEEK_SET 0 |
| Seek relative to the start of the file. | |
| #define | F_LOCK 1 |
| Lock a region of a file (lockf command). | |
| #define | F_TEST 3 |
| Test whether a file region is locked (lockf command). | |
| #define | F_TLOCK 2 |
| Lock a region, failing immediately if blocked (lockf command). | |
| #define | F_ULOCK 0 |
| Unlock a region (lockf command). | |
| #define | STDERR_FILENO 2 |
| File descriptor for standard error. | |
| #define | STDIN_FILENO 0 |
| File descriptor for standard input. | |
| #define | STDOUT_FILENO 1 |
| File descriptor for standard output. | |
| #define | _POSIX_VDISABLE ('\0') |
| Value used to disable a special character in a terminal. | |
| #define | _GID_T_DECLARED |
| #define | __gid_t_defined |
| #define | _OFF_T_DECLARED |
| #define | __off_t_defined |
| #define | _PID_T_DECLARED |
| #define | __pid_t_defined |
| #define | __SIZE_TYPE__ unsigned long |
| #define | unsigned signed /* parasoft-suppress MISRAC2012-RULE_20_4-a MISRAC2012-RULE_20_4-b */ |
| #define | _SSIZE_T_DECLARED |
| #define | __ssize_t_defined |
| #define | _UID_T_DECLARED |
| #define | __uid_t_defined |
| #define | _USECONDS_T_DECLARED |
| #define | __useconds_t_defined |
Typedefs | |
| typedef unsigned short | gid_t |
| typedef long | off_t |
| typedef int | pid_t |
| typedef signed long | ssize_t |
| typedef unsigned short | uid_t |
| typedef unsigned long | useconds_t |
Functions | |
| int | access (const char *path, int amode) |
| Determine accessibility of a file. | |
| unsigned int | alarm (unsigned int seconds) |
| Schedule an alarm signal (SIGALRM) after a given number of seconds. | |
| int | chdir (const char *path) |
| Change the current working directory. | |
| int | chown (const char *path, uid_t owner, gid_t group) |
| Change the owner and group of a file. | |
| int | close (int fildes) |
| Close a file descriptor. | |
| size_t | confstr (int name, char *buf, size_t len) |
| Determine the value of a configurable system variable by name string. | |
| char * | crypt (const char *key, const char *salt) |
| Encrypt a password string (XSI extension, not recommended for new code). | |
| int | dup (int fildes) |
| Duplicate an open file descriptor to the lowest available descriptor. | |
| int | dup2 (int fildes, int fildes2) |
| Duplicate an open file descriptor to a specific descriptor number. | |
| FUNC_NORETURN void | _exit (int status) |
| Terminate the calling process without calling atexit() handlers. | |
| void | encrypt (char block[64], int edflag) |
| Encrypt or decrypt a 64-bit block using DES (XSI extension). | |
| int | execl (const char *path, const char *arg0,...) |
| Replace the process image with a new program (argument list form). | |
| int | execle (const char *path, const char *arg0,...) |
| Replace process image with a new program plus environment (argument list form). | |
| int | execlp (const char *file, const char *arg0,...) |
| Replace process image using PATH search (argument list form). | |
| int | execv (const char *path, char *const argv[]) |
| Replace process image with a new program (vector form). | |
| int | execve (const char *path, char *const argv[], char *const envp[]) |
| Replace process image with a new program plus environment (vector form). | |
| int | execvp (const char *file, char *const argv[]) |
| Replace process image using PATH search (vector form). | |
| int | faccessat (int fd, const char *path, int amode, int flag) |
| Determine accessibility of a file relative to a directory descriptor. | |
| int | fchdir (int fildes) |
| Change the current working directory to the directory named by a file descriptor. | |
| int | fchown (int fildes, uid_t owner, gid_t group) |
| Change the owner and group of an open file. | |
| int | fchownat (int fd, const char *path, uid_t owner, gid_t group, int flag) |
| Change owner and group of a file relative to a directory descriptor. | |
| int | fdatasync (int fildes) |
| Synchronise the data of an open file to storage (without metadata). | |
| int | fexecve (int fd, char *const argv[], char *const envp[]) |
| Replace process image using an open file descriptor (vector form). | |
| pid_t | fork (void) |
| Create a child process. | |
| long | fpathconf (int fildes, int name) |
| Determine the value of a configurable limit for an open file. | |
| int | fsync (int fd) |
| Synchronise an open file's data and metadata to storage. | |
| int | ftruncate (int fildes, off_t length) |
| Truncate an open file to a specified length. | |
| char * | getcwd (char *buf, size_t size) |
| Get the pathname of the current working directory. | |
| gid_t | getegid (void) |
| Get the effective group ID of the calling process. | |
| int | getentropy (void *buffer, size_t length) |
| Fill a buffer with cryptographically secure random bytes. | |
| uid_t | geteuid (void) |
| Get the effective user ID of the calling process. | |
| gid_t | getgid (void) |
| Get the real group ID of the calling process. | |
| int | getgroups (int gidsetsize, gid_t grouplist[]) |
| Get the supplementary group IDs of the calling process. | |
| long | gethostid (void) |
| Get a unique identifier for the host system (XSI extension). | |
| int | gethostname (char *name, size_t namelen) |
| Get the name of the current host. | |
| char * | getlogin (void) |
| Get the login name of the user. | |
| int | getlogin_r (char *name, size_t namesize) |
| Get the login name of the user into a caller-supplied buffer. | |
| int | getopt (int argc, char *const argv[], const char *optstring) |
| Parse command-line options. | |
| pid_t | getpgid (pid_t pid) |
| Get the process group ID of a process. | |
| pid_t | getpgrp (void) |
| Get the process group ID of the calling process. | |
| pid_t | getpid (void) |
| Get the process ID of the calling process. | |
| pid_t | getppid (void) |
| Get the process ID of the parent of the calling process. | |
| pid_t | getsid (pid_t pid) |
| Get the session ID of a process. | |
| uid_t | getuid (void) |
| Get the real user ID of the calling process. | |
| int | isatty (int fildes) |
| Determine whether a file descriptor refers to a terminal. | |
| int | lchown (const char *path, uid_t owner, gid_t group) |
| Change the owner and group of a symbolic link. | |
| int | link (const char *path1, const char *path2) |
| Create a hard link. | |
| int | linkat (int fd1, const char *path1, int fd2, const char *path2, int flag) |
| Create a hard link relative to directory file descriptors. | |
| int | lockf (int fildes, int function, off_t size) |
| Apply, test, or remove an advisory file lock (XSI extension). | |
| off_t | lseek (int fildes, off_t offset, int whence) |
| Reposition the file offset of an open file descriptor. | |
| int | nice (int incr) |
| Change the scheduling priority of the calling process (XSI extension). | |
| long | pathconf (const char *path, int name) |
| Determine the value of a configurable limit for a file path. | |
| int | pause (void) |
| Suspend process execution until a signal is received. | |
| int | pipe (int fildes[2]) |
| Create a pipe — a pair of connected file descriptors. | |
| ssize_t | pread (int fildes, void *buf, size_t nbyte, off_t offset) |
| Read from a file at a given offset without changing the file offset. | |
| ssize_t | pwrite (int fildes, const void *buf, size_t nbyte, off_t offset) |
| Write to a file at a given offset without changing the file offset. | |
| ssize_t | read (int fildes, void *buf, size_t nbyte) |
| Read from a file descriptor. | |
| ssize_t | readlink (const char *restrict path, char *restrict buf, size_t bufsize) |
| Read the value of a symbolic link. | |
| ssize_t | readlinkat (int fd, const char *restrict path, char *restrict buf, size_t bufsize) |
| Read the value of a symbolic link relative to a directory descriptor. | |
| int | rmdir (const char *path) |
| Remove an empty directory. | |
| int | setegid (gid_t gid) |
| Set the effective group ID of the calling process. | |
| int | seteuid (uid_t uid) |
| Set the effective user ID of the calling process. | |
| int | setgid (gid_t gid) |
| Set the real group ID of the calling process. | |
| int | setpgid (pid_t pid, pid_t pgid) |
| Set the process group ID for a process. | |
| pid_t | setpgrp (void) |
| Set the process group ID to the process ID of the calling process (obsolescent). | |
| int | setregid (gid_t rgid, gid_t egid) |
| Set the real and effective group IDs (XSI extension). | |
| int | setreuid (uid_t ruid, uid_t euid) |
| Set the real and effective user IDs (XSI extension). | |
| pid_t | setsid (void) |
| Create a new session and set the process group ID. | |
| int | setuid (uid_t uid) |
| Set the real user ID of the calling process. | |
| unsigned int | sleep (unsigned int seconds) |
| Suspend execution for at least the specified number of seconds. | |
| void | swab (const void *ZRESTRICT src, void *ZRESTRICT dest, ssize_t nbytes) |
| Swap bytes in a block of memory (XSI extension). | |
| int | symlink (const char *path1, const char *path2) |
| Create a symbolic link. | |
| int | symlinkat (const char *path1, int fd, const char *path2) |
| Create a symbolic link relative to a directory file descriptor. | |
| void | sync (void) |
| Schedule outstanding writes to all file systems (XSI extension). | |
| long | sysconf (int opt) |
| Get a configurable system variable. | |
| pid_t | tcgetpgrp (int fildes) |
| Get the process group ID of the foreground process group of the terminal. | |
| int | tcsetpgrp (int fildes, pid_t pgid_id) |
| Set the foreground process group ID of a terminal. | |
| int | truncate (const char *path, off_t length) |
| Truncate a file on the filesystem to a specified length. | |
| char * | ttyname (int fildes) |
| Get the name of the terminal associated with a file descriptor. | |
| int | ttyname_r (int fildes, char *name, size_t namesize) |
| Get the name of the terminal into a caller-supplied buffer. | |
| int | unlink (const char *path) |
| Remove a directory entry. | |
| int | unlinkat (int fd, const char *path, int flag) |
| Remove a directory entry relative to a directory file descriptor. | |
| int | usleep (useconds_t useconds) |
| Suspend execution for at least the specified number of microseconds (obsolescent). | |
| ssize_t | write (int fildes, const void *buf, size_t nbyte) |
| Write to a file descriptor. | |
Variables | |
| char * | optarg |
| Argument for the current option from getopt(). | |
| int | opterr |
| Error flag for getopt() (non-zero enables error messages). | |
| int | optind |
| Index of the next element to be processed by getopt(). | |
| int | optopt |
| Unrecognised option character from getopt(). | |
POSIX symbolic constants and miscellaneous functions (<unistd.h>)
Provides symbolic constants for file access modes, seek positions, and option groups, together with the full set of POSIX miscellaneous functions (process control, file I/O, user/group IDs, and process environment).
Definition in file unistd.h.
| #define unsigned signed /* parasoft-suppress MISRAC2012-RULE_20_4-a MISRAC2012-RULE_20_4-b */ |
| typedef unsigned long useconds_t |
1.9.8