The Linux Manuals (man pages) document is an important part of Linux documents. Linux Manuals are organized as several sections. Each section has a group of commands for a specific area in Linux usage, administration or development.
NAME setxattr, lsetxattr, fsetxattr – set an extended attribute value SYNOPSIS #include <sys/types.h> #include <sys/xattr.h> int setxattr(const char *path, const char *name, const void *value, size_t size, int flags); int lsetxattr(const char *path, const char *name, const void *value, size_t size, int flags); int fsetxattr(int fd, const char …
NAME removexattr, lremovexattr, fremovexattr – remove an extended attribute SYNOPSIS #include <sys/types.h> #include <sys/xattr.h> int removexattr(const char *path, const char *name); int lremovexattr(const char *path, const char *name); int fremovexattr(int fd, const char *name); DESCRIPTION Extended attributes are name:value pairs associated with inodes (files, directories, symbolic links, etc.). They are…
NAME alloc_hugepages, free_hugepages – allocate or free huge pages SYNOPSIS void *alloc_hugepages(int key, void *addr, size_t len, int prot, int flag); int free_hugepages(void *addr); DESCRIPTION The system calls alloc_hugepages() and free_hugepages() were introduced in Linux 2.5.36 and removed again in 2.5.54. They existed only on i386 and ia64 (when built with CONFIG_HUGETLB_PAGE). In Linux 2.4.20,…
NAME flock – apply or remove an advisory lock on an open file SYNOPSIS #include <sys/file.h> int flock(int fd, int operation); DESCRIPTION Apply or remove an advisory lock on the open file specified by fd. The argument operation is one of the following: LOCK_SH Place a shared lock. More than one process may hold a…
NAME listxattr, llistxattr, flistxattr – list extended attribute names SYNOPSIS #include <sys/types.h> #include <sys/xattr.h> ssize_t listxattr(const char *path, char *list, size_t size); ssize_t llistxattr(const char *path, char *list, size_t size); ssize_t flistxattr(int fd, char *list, size_t size); DESCRIPTION Extended attributes are name:value pairs associated with inodes (files, directories, symbolic links,…
NAME init_module, finit_module – load a kernel module SYNOPSIS int init_module(void *module_image, unsigned long len, const char *param_values); int finit_module(int fd, const char *param_values, int flags); Note: glibc provides no header file declaration of init_module() and no wrapper function for finit_module(); see NOTES. DESCRIPTION init_module() loads an ELF image into kernel space, performs any necessary…
NAME getxattr, lgetxattr, fgetxattr – retrieve an extended attribute value SYNOPSIS #include <sys/types.h> #include <sys/xattr.h> ssize_t getxattr(const char *path, const char *name, void *value, size_t size); ssize_t lgetxattr(const char *path, const char *name, void *value, size_t size); ssize_t fgetxattr(int fd, const char *name, void *value, size_t size);…
NAME afs_syscall, break, fattach, fdetach, ftime, getmsg, getpmsg, gtty, isastream, lock, madvise1, mpx, prof, profil, putmsg, putpmsg, security, stty, tuxcall, ulimit, vserver – unimplemented system calls SYNOPSIS Unimplemented system calls. DESCRIPTION These system calls are not implemented in the Linux kernel. RETURN VALUE These system calls always return -1 and set errno to ENOSYS. NOTES…
NAME fsync, fdatasync – synchronize a file’s in-core state with storage device SYNOPSIS #include <unistd.h> int fsync(int fd); int fdatasync(int fd); Feature Test Macro Requirements for glibc (see feature_test_macros(7)): fsync(): Glibc 2.16 and later: No feature test macros need be defined Glibc up to and including 2.15: _BSD_SOURCE || _XOPEN_SOURCE || /* since glibc 2.8: */ _POSIX_C_SOURCE >= 200112L fdatasync(): _POSIX_C_SOURCE >= 199309L || _XOPEN_SOURCE >= 500…
NAME fcntl – manipulate file descriptor SYNOPSIS #include <fcntl.h> #include <unistd.h> int fcntl(int fd, int cmd, … /* arg */); DESCRIPTION fcntl() performs one of the operations described below on the open file descriptor fd. The operation is determined by cmd. fcntl() can take an optional third argument. Whether or not this argument is required…
NAME fcntl – manipulate file descriptor SYNOPSIS #include <fcntl.h> #include <unistd.h> int fcntl(int fd, int cmd, … /* arg */); DESCRIPTION fcntl() performs one of the operations described below on the open file descriptor fd. The operation is determined by cmd. fcntl() can take an optional third argument. Whether or not this argument is required…
NAME chown, fchown, lchown, fchownat – change ownership of a file SYNOPSIS #include <unistd.h> int chown(const char *pathname, uid_t owner, gid_t group); int fchown(int fd, uid_t owner, gid_t group); int lchown(const char *pathname, uid_t owner, gid_t group); #include <fcntl.h> /* Definition of AT_* constants */ #include <unistd.h> int fchownat(int dirfd, const char *pathname, uid_t owner,…
NAME chown, fchown, lchown, fchownat – change ownership of a file SYNOPSIS #include <unistd.h> int chown(const char *pathname, uid_t owner, gid_t group); int fchown(int fd, uid_t owner, gid_t group); int lchown(const char *pathname, uid_t owner, gid_t group); #include <fcntl.h> /* Definition of AT_* constants */ #include <unistd.h> int fchownat(int dirfd, const char *pathname, uid_t owner,…
NAME chown, fchown, lchown, fchownat – change ownership of a file SYNOPSIS #include <unistd.h> int chown(const char *pathname, uid_t owner, gid_t group); int fchown(int fd, uid_t owner, gid_t group); int lchown(const char *pathname, uid_t owner, gid_t group); #include <fcntl.h> /* Definition of AT_* constants */ #include <unistd.h> int fchownat(int dirfd, const char *pathname, uid_t owner,…
NAME chmod, fchmod, fchmodat – change permissions of a file SYNOPSIS #include <sys/stat.h> int chmod(const char *pathname, mode_t mode); int fchmod(int fd, mode_t mode); #include <fcntl.h> /* Definition of AT_* constants */ #include <sys/stat.h> int fchmodat(int dirfd, const char *pathname, mode_t mode, int flags); Feature Test Macro Requirements for glibc (see feature_test_macros(7)): fchmod(): Since glibc…
NAME chmod, fchmod, fchmodat – change permissions of a file SYNOPSIS #include <sys/stat.h> int chmod(const char *pathname, mode_t mode); int fchmod(int fd, mode_t mode); #include <fcntl.h> /* Definition of AT_* constants */ #include <sys/stat.h> int fchmodat(int dirfd, const char *pathname, mode_t mode, int flags); Feature Test Macro Requirements for glibc (see feature_test_macros(7)): fchmod(): Since glibc…
NAME chdir, fchdir – change working directory SYNOPSIS #include <unistd.h> int chdir(const char *path); int fchdir(int fd); Feature Test Macro Requirements for glibc (see feature_test_macros(7)): fchdir(): _XOPEN_SOURCE >= 500 || /* Since glibc 2.12: */ _POSIX_C_SOURCE >= 200809L || /* Glibc up to and including 2.19: */ _BSD_SOURCE DESCRIPTION chdir() changes the current working directory of the calling process to the directory specified in path. fchdir() is…
NAME afs_syscall, break, fattach, fdetach, ftime, getmsg, getpmsg, gtty, isastream, lock, madvise1, mpx, multiplexer, prof, profil, putmsg, putpmsg, security, stty, tuxcall, ulimit, vserver – unimplemented system calls SYNOPSIS Unimplemented system calls. DESCRIPTION These system calls are not implemented in the Linux 2.6.22 kernel. RETURN VALUE These system calls always return -1 and set errno to…
NAME afs_syscall, break, fattach, fdetach, ftime, getmsg, getpmsg, gtty, isastream, lock, madvise1, mpx, prof, profil, putmsg, putpmsg, security, stty, tuxcall, ulimit, vserver – unimplemented system calls SYNOPSIS Unimplemented system calls. DESCRIPTION These system calls are not implemented in the Linux kernel. RETURN VALUE These system calls always return -1 and set errno to ENOSYS. NOTES…
NAME fanotify_mark – add, remove, or modify an fanotify mark on a filesystem object SYNOPSIS #include <sys/fanotify.h> int fanotify_mark(int fanotify_fd, unsigned int flags, uint64_t mask, int dirfd, const char *pathname); DESCRIPTION For an overview of the fanotify API, see fanotify(7). fanotify_mark() adds, removes, or modifies an fanotify mark on a filesystem object. The caller must…