diff options
Diffstat (limited to 'eBones/lib/libkrb/tf_shm.c')
| -rw-r--r-- | eBones/lib/libkrb/tf_shm.c | 176 |
1 files changed, 0 insertions, 176 deletions
diff --git a/eBones/lib/libkrb/tf_shm.c b/eBones/lib/libkrb/tf_shm.c deleted file mode 100644 index 31894cb83983..000000000000 --- a/eBones/lib/libkrb/tf_shm.c +++ /dev/null @@ -1,176 +0,0 @@ -/* - * Copyright 1988 by the Massachusetts Institute of Technology. - * For copying and distribution information, please see the file - * <Copyright.MIT>. - * - * Shared memory segment functions for session keys. Derived from code - * contributed by Dan Kolkowitz (kolk@jessica.stanford.edu). - * - * from: tf_shm.c,v 4.2 89/10/25 23:26:46 qjb Exp $ - * $Id: tf_shm.c,v 1.3 1995/07/18 16:39:48 mark Exp $ - */ - -#if 0 -#ifndef lint -static char rcsid[] = -"$Id: tf_shm.c,v 1.3 1995/07/18 16:39:48 mark Exp $"; -#endif lint -#endif - -#include <stdio.h> -#include <sys/types.h> -#include <sys/ipc.h> -#include <sys/shm.h> -#include <krb.h> -#include <des.h> -#include <sys/stat.h> -#include <fcntl.h> - -#define MAX_BUFF sizeof(des_cblock)*1000 /* room for 1k keys */ - -extern int errno; -extern int krb_debug; - -/* - * krb_create_shmtkt: - * - * create a shared memory segment for session keys, leaving its id - * in the specified filename. - */ - -int -krb_shm_create(file_name) -char *file_name; -{ - int retval; - int shmid; - struct shmid_ds shm_buf; - FILE *sfile; - uid_t me, metoo, getuid(), geteuid(); - - (void) krb_shm_dest(file_name); /* nuke it if it exists... - this cleans up to make sure we - don't slowly lose memory. */ - - shmid = shmget((long)IPC_PRIVATE,MAX_BUFF, IPC_CREAT); - if (shmid == -1) { - if (krb_debug) - perror("krb_shm_create shmget"); - return(KFAILURE); /* XXX */ - } - me = getuid(); - metoo = geteuid(); - /* - * now set up the buffer so that we can modify it - */ - shm_buf.shm_perm.uid = me; - shm_buf.shm_perm.gid = getgid(); - shm_buf.shm_perm.mode = 0600; - if (shmctl(shmid,IPC_SET,&shm_buf) < 0) { /*can now map it */ - if (krb_debug) - perror("krb_shm_create shmctl"); - (void) shmctl(shmid, IPC_RMID, 0); - return(KFAILURE); /* XXX */ - } - (void) shmctl(shmid, SHM_LOCK, 0); /* attempt to lock-in-core */ - /* arrange so the file is owned by the ruid - (swap real & effective uid if necessary). */ - if (me != metoo) { - if (setreuid(metoo, me) < 0) { - /* can't switch??? barf! */ - if (krb_debug) - perror("krb_shm_create: setreuid"); - (void) shmctl(shmid, IPC_RMID, 0); - return(KFAILURE); - } else - if (krb_debug) - printf("swapped UID's %d and %d\n",metoo,me); - } - if ((sfile = fopen(file_name,"w")) == 0) { - if (krb_debug) - perror("krb_shm_create file"); - (void) shmctl(shmid, IPC_RMID, 0); - return(KFAILURE); /* XXX */ - } - if (fchmod(fileno(sfile),0600) < 0) { - if (krb_debug) - perror("krb_shm_create fchmod"); - (void) shmctl(shmid, IPC_RMID, 0); - return(KFAILURE); /* XXX */ - } - if (me != metoo) { - if (setreuid(me, metoo) < 0) { - /* can't switch??? barf! */ - if (krb_debug) - perror("krb_shm_create: setreuid2"); - (void) shmctl(shmid, IPC_RMID, 0); - return(KFAILURE); - } else - if (krb_debug) - printf("swapped UID's %d and %d\n",me,metoo); - } - - (void) fprintf(sfile,"%d",shmid); - (void) fflush(sfile); - (void) fclose(sfile); - return(KSUCCESS); -} - - -/* - * krb_is_diskless: - * - * check / to see if file .diskless exists. If so it is diskless. - * Do it this way now to avoid dependencies on a particular routine. - * Choose root file system since that will be private to the client. - */ - -int krb_is_diskless() -{ - struct stat buf; - if (stat("/.diskless",&buf) < 0) - return(0); - else return(1); -} - -/* - * krb_shm_dest: destroy shared memory segment with session keys, and remove - * file pointing to it. - */ - -int krb_shm_dest(file) -char *file; -{ - int shmid; - FILE *sfile; - struct stat st_buf; - - if (stat(file,&st_buf) == 0) { - /* successful stat */ - if ((sfile = fopen(file,"r")) == 0) { - if (krb_debug) - perror("cannot open shared memory file"); - return(KFAILURE); /* XXX */ - } - if (fscanf(sfile,"%d",&shmid) == 1) { - if (shmctl(shmid,IPC_RMID,0) != 0) { - if (krb_debug) - perror("krb_shm_dest: cannot delete shm segment"); - (void) fclose(sfile); - return(KFAILURE); /* XXX */ - } - } else { - if (krb_debug) - fprintf(stderr, "bad format in shmid file\n"); - (void) fclose(sfile); - return(KFAILURE); /* XXX */ - } - (void) fclose(sfile); - (void) unlink(file); - return(KSUCCESS); - } else - return(RET_TKFIL); /* XXX */ -} - - - |