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    Command:

    keyctl_setperm

    
    
    

    SYNOPSIS

           #include <keyutils.h>
    
           long keyctl_setperm(key_serial_t key, key_perm_t perm);
    
    
    

    DESCRIPTION

           keyctl_setperm() changes the permissions mask on a key.
    
           A process that does not have the SysAdmin capability may not change the
           permissions mask on a key that doesn't have the same UID as the caller.
    
           The  caller must have setattr permission on a key to be able change its
           permissions mask.
    
           The permissions mask is a bitwise-OR of the following flags:
    
           KEY_xxx_VIEW
                  Grant permission to view the attributes of a key.
    
           KEY_xxx_READ
                  Grant permission to read the payload of  a  key  or  to  list  a
                  keyring.
    
           KEY_xxx_WRITE
                  Grant  permission  to  modify  the payload of a key or to add or
                  remove links to/from a keyring.
    
           KEY_xxx_SEARCH
                  Grant permission to find a key or to search a keyring.
    
           KEY_xxx_LINK
                  Grant permission to make links to a key.
    
           KEY_xxx_SETATTR
                  Grant  permission  to  change  the  ownership  and   permissions
                  attributes of a key.
    
           KEY_xxx_ALL
                  Grant all the above.
    
           The 'xxx' in the above should be replaced by one of:
    
           POS    Grant the permission to a process that possesses the key (has it
                  attached searchably to one of the process's keyrings).
    
           USR    Grant the permission to a process with the same UID as the  key.
    
           GRP    Grant  the permission to a process with the same GID as the key,
                  or with a match for the key's GID amongst that process's  Groups
                  list.
    
           OTH    Grant the permission to any other process.
           returned and errno will have been set to an appropriate error.
    
    
    

    ERRORS

           ENOKEY The specified key does not exist.
    
           EKEYEXPIRED
                  The specified key has expired.
    
           EKEYREVOKED
                  The specified key has been revoked.
    
           EACCES The  named  key exists, but does not grant setattr permission to
                  the calling process.
    
    
    

    LINKING

           This is a library function that can  be  found  in  libkeyutils.   When
           linking, -lkeyutils should be specified to the linker.
    
    
    

    SEE ALSO

           keyctl(1),
           add_key(2),
           keyctl(2),
           request_key(2),
           keyctl(3),
           request-key(8)
    
    
    

    Linux 4 May 2006 KEYCTL_SETPERM(3)

    
    
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