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SETXATTR(2)                Linux Programmer's ManualSETXATTR(2)NAME       setxattr, lsetxattr, fsetxattr - set an extended attribute valueSYNOPSIS       #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,                     const void *value, size_t size, int flags);DESCRIPTION       Extended attributes are name:value pairs associated with inodes (files,       directories, symbolic links, etc.).  They are extensions to the  normal       attributes  which  are  associated with all inodes in the system (i.e.,       thestat(2) data).  A complete overview of extended attributes concepts       can be found inxattr(7).       setxattr()  sets the value of the extended attribute identified by name       and associated with the given path in the filesystem.  The  size  argu-       ment  specifies  the  size  (in bytes) of value; a zero-length value is       permitted.       lsetxattr() is identical to setxattr(), except in the case  of  a  sym-       bolic link, where the extended attribute is set on the link itself, not       the file that it refers to.       fsetxattr() is identical to setxattr(), only the extended attribute  is       set  on  the  open  file  referred to by fd (as returned byopen(2)) in       place of path.       An extended attribute name is a null-terminated string.  The  name  in-       cludes  a  namespace  prefix; there may be several, disjoint namespaces       associated with an individual inode.  The value of an  extended  attri-       bute  is  a  chunk  of  arbitrary  textual  or binary data of specified       length.       By default (i.e., flags is zero), the extended attribute will  be  cre-       ated  if it does not exist, or the value will be replaced if the attri-       bute already exists.  To modify these semantics, one of  the  following       values can be specified in flags:       XATTR_CREATE              Perform a pure create, which fails if the named attribute exists              already.       XATTR_REPLACE              Perform a pure replace operation, which fails if the  named  at-              tribute does not already exist.RETURN VALUE       On  success, zero is returned.  On failure, -1 is returned and errno is       set appropriately.ERRORS       EDQUOT Disk quota limits meant that there is insufficient space remain-              ing to store the extended attribute.       EEXIST XATTR_CREATE was specified, and the attribute exists already.       ENODATA              XATTR_REPLACE was specified, and the attribute does not exist.       ENOSPC There  is insufficient space remaining to store the extended at-              tribute.       ENOTSUP              The namespace prefix of name is not valid.       ENOTSUP              Extended attributes are not supported by the filesystem, or  are              disabled,       EPERM  The   file   is   marked   immutable   or   append-only.    (Seeioctl_iflags(2).)       In addition, the errors documented instat(2) can also occur.       ERANGE The size of name or value exceeds a filesystem-specific limit.VERSIONS       These system calls have been available on Linux since kernel 2.4; glibc       support is provided since version 2.3.CONFORMING TO       These system calls are Linux-specific.SEE ALSOgetfattr(1),setfattr(1),getxattr(2),listxattr(2),open(2), removex-attr(2),stat(2),symlink(7),xattr(7)COLOPHON       This page is part of release 5.05 of the Linux  man-pages  project.   A       description  of  the project, information about reporting bugs, and the       latest    version    of    this    page,    can     be     found     at       https://www.kernel.org/doc/man-pages/.Linux                             2019-08-02SETXATTR(2)