man kafs (Fonctions bibliothèques) - k_hasafs ,
NAME
LIBRARY
AFS cache manager access library (libkafs, -lkafs)
SYNOPSIS
DESCRIPTION
initializes some library internal structures, and tests for the presence of AFS in the kernel, none of the other functions should be called before k_hasafs is called, or if it fails.
krb_afslog , and krb_afslog_uid obtains new tokens (and possibly tickets) for the specified cell and realm . If cell is NULL , the local cell is used. If realm is NULL , the function tries to guess what realm to use. Unless you have some good knowledge of what cell or realm to use, you should pass NULL . krb_afslog will use the real user-id for the ViceId field in the token, krb_afslog_uid will use uid .
k_afs_cell_of_file will in cell return the cell of a specified file, no more than len characters is put in cell .
k_pioctl does a pioctl syscall with the specified arguments. This function is equivalent to lpioctl .
k_setpag initializes a new PAG.
k_unlog removes destroys all tokens in the current PAG.
RETURN VALUES
returns 1 if AFS is present in the kernel, 0 otherwise. krb_afslog and krb_afslog_uid returns 0 on success, or a kerberos error number on failure. k_afs_cell_of_file , k_pioctl , k_setpag , and k_unlog all return the value of the underlaying system call, 0 on success.
ENVIRONMENT
The following environment variable affect the mode of operation of kafs :
- AFS_SYSCALL
- Normally, kafs will try to figure out the correct system call(s) that are used by AFS by itself. If it does not manage to do that, or does it incorrectly, you can set this variable to the system call number or list of system call numbers that should be used.
EXAMPLES
The following code from login will obtain a new PAG and tokens for the local cell and the cell of the users home directory. if (k_hasafs()) { char cell[64]; k_setpag(); if(k_afs_cell_of_file(pwd->pw_dir, cell, sizeof(cell)) == 0) krb_afslog(cell, NULL); krb_afslog(NULL, NULL); }
ERRORS
If any of these functions (apart from k_hasafs ) is called without AFS beeing present in the kernel, the process will usually (depending on the operating system) receive a SIGSYS signal.
SEE ALSO
BUGS
has no effect under AIX.