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Annotation of 43BSDReno/kerberosIV/krb/tkt_string.c, revision 1.1.1.1

1.1       root        1: /*
                      2:  * $Source: /usr/src/kerberosIV/krb/RCS/tkt_string.c,v $
                      3:  * $Author: kfall $
                      4:  *
                      5:  * Copyright 1985, 1986, 1987, 1988 by the Massachusetts Institute
                      6:  * of Technology.
                      7:  *
                      8:  * For copying and distribution information, please see the file
                      9:  * <mit-copyright.h>.
                     10:  */
                     11: 
                     12: #ifndef lint
                     13: static char *rcsid_tkt_string_c =
                     14: "$Header: /usr/src/kerberosIV/krb/RCS/tkt_string.c,v 4.7 90/06/25 20:57:33 kfall Exp $";
                     15: #endif /* lint */
                     16: 
                     17: #include <mit-copyright.h>
                     18: #include <stdio.h>
                     19: #include <sys/types.h>
                     20: #include <des.h>
                     21: #include <krb.h>
                     22: #include <string.h>
                     23: #include <sys/param.h>
                     24: 
                     25: char *getenv();
                     26: 
                     27: /*
                     28:  * This routine is used to generate the name of the file that holds
                     29:  * the user's cache of server tickets and associated session keys.
                     30:  *
                     31:  * If it is set, krb_ticket_string contains the ticket file name.
                     32:  * Otherwise, the filename is constructed as follows:
                     33:  *
                     34:  * If it is set, the environment variable "KRBTKFILE" will be used as
                     35:  * the ticket file name.  Otherwise TKT_ROOT (defined in "krb.h") and
                     36:  * the user's uid are concatenated to produce the ticket file name
                     37:  * (e.g., "/tmp/tkt123").  A pointer to the string containing the ticket
                     38:  * file name is returned.
                     39:  */
                     40: 
                     41: static char krb_ticket_string[MAXPATHLEN] = "";
                     42: 
                     43: char *tkt_string()
                     44: {
                     45:     char *env;
                     46:     uid_t getuid();
                     47: 
                     48:     if (!*krb_ticket_string) {
                     49:         if (env = getenv("KRBTKFILE")) {
                     50:            (void) strncpy(krb_ticket_string, env,
                     51:                           sizeof(krb_ticket_string)-1);
                     52:            krb_ticket_string[sizeof(krb_ticket_string)-1] = '\0';
                     53:        } else {
                     54:            /* 32 bits of signed integer will always fit in 11 characters
                     55:             (including the sign), so no need to worry about overflow */
                     56:            (void) sprintf(krb_ticket_string, "%s%d",TKT_ROOT,getuid());
                     57:         }
                     58:     }
                     59:     return krb_ticket_string;
                     60: }
                     61: 
                     62: /*
                     63:  * This routine is used to set the name of the file that holds the user's
                     64:  * cache of server tickets and associated session keys.
                     65:  *
                     66:  * The value passed in is copied into local storage.
                     67:  *
                     68:  * NOTE:  This routine should be called during initialization, before other
                     69:  * Kerberos routines are called; otherwise tkt_string() above may be called
                     70:  * and return an undesired ticket file name until this routine is called.
                     71:  */
                     72: 
                     73: void
                     74: krb_set_tkt_string(val)
                     75: char *val;
                     76: {
                     77: 
                     78:     (void) strncpy(krb_ticket_string, val, sizeof(krb_ticket_string)-1);
                     79:     krb_ticket_string[sizeof(krb_ticket_string)-1] = '\0';
                     80: 
                     81:     return;
                     82: }

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