332 lines
6.9 KiB
C
332 lines
6.9 KiB
C
/*
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* Sun RPC is a product of Sun Microsystems, Inc. and is provided for
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* unrestricted use provided that this legend is included on all tape
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* media and as a part of the software program in whole or part. Users
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* may copy or modify Sun RPC without charge, but are not authorized
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* to license or distribute it to anyone else except as part of a product or
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* program developed by the user or with the express written consent of
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* Sun Microsystems, Inc.
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*
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* SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
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* WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
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*
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* Sun RPC is provided with no support and without any obligation on the
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* part of Sun Microsystems, Inc. to assist in its use, correction,
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* modification or enhancement.
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*
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* SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
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* INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
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* OR ANY PART THEREOF.
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*
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* In no event will Sun Microsystems, Inc. be liable for any lost revenue
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* or profits or other special, indirect and consequential damages, even if
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* Sun has been advised of the possibility of such damages.
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*
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* Sun Microsystems, Inc.
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* 2550 Garcia Avenue
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* Mountain View, California 94043
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*/
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)update.c 1.2 91/03/11 Copyr 1986 Sun Micro";
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#endif
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static const char rcsid[] =
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"$FreeBSD$";
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#endif /* not lint */
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/*
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* Copyright (C) 1986, 1989, Sun Microsystems, Inc.
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*/
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/*
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* Administrative tool to add a new user to the publickey database
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <rpc/rpc.h>
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#include <rpc/key_prot.h>
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#ifdef YP
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#include <rpcsvc/yp_prot.h>
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#include <rpcsvc/ypclnt.h>
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#include <sys/wait.h>
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#include <netdb.h>
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#endif /* YP */
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#include <pwd.h>
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#include <string.h>
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#include <sys/resource.h>
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#include <stdlib.h>
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#include "ypupdated_extern.h"
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#ifdef YP
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#define MAXMAPNAMELEN 256
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#else
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#define YPOP_CHANGE 1 /* change, do not add */
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#define YPOP_INSERT 2 /* add, do not change */
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#define YPOP_DELETE 3 /* delete this entry */
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#define YPOP_STORE 4 /* add, or change */
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#endif
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#ifdef YP
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static char SHELL[] = "/bin/sh";
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static char YPDBPATH[]="/var/yp"; /* This is defined but not used! */
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static char PKMAP[] = "publickey.byname";
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static char UPDATEFILE[] = "updaters";
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static char PKFILE[] = "/etc/publickey";
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#endif /* YP */
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#ifdef YP
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static int _openchild(char *, FILE **, FILE **);
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/*
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* Determine if requester is allowed to update the given map,
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* and update it if so. Returns the yp status, which is zero
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* if there is no access violation.
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*/
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int
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mapupdate(char *requester, char *mapname, u_int op, u_int keylen, char *key,
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u_int datalen, char *data)
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{
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char updater[MAXMAPNAMELEN + 40];
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FILE *childargs;
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FILE *childrslt;
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#ifdef WEXITSTATUS
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int status;
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#else
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union wait status;
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#endif
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pid_t pid;
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u_int yperrno;
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#ifdef DEBUG
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printf("%s %s\n", key, data);
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#endif
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(void)sprintf(updater, "make -s -f %s/%s %s", YPDBPATH, /* !!! */
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UPDATEFILE, mapname);
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pid = _openchild(updater, &childargs, &childrslt);
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if (pid < 0) {
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return (YPERR_YPERR);
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}
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/*
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* Write to child
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*/
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(void)fprintf(childargs, "%s\n", requester);
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(void)fprintf(childargs, "%u\n", op);
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(void)fprintf(childargs, "%u\n", keylen);
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(void)fwrite(key, (int)keylen, 1, childargs);
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(void)fprintf(childargs, "\n");
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(void)fprintf(childargs, "%u\n", datalen);
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(void)fwrite(data, (int)datalen, 1, childargs);
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(void)fprintf(childargs, "\n");
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(void)fclose(childargs);
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/*
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* Read from child
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*/
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(void)fscanf(childrslt, "%d", &yperrno);
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(void)fclose(childrslt);
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(void)wait(&status);
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#ifdef WEXITSTATUS
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if (WEXITSTATUS(status) != 0)
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#else
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if (status.w_retcode != 0)
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#endif
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return (YPERR_YPERR);
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return (yperrno);
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}
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/*
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* returns pid, or -1 for failure
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*/
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static int
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_openchild(char *command, FILE **fto, FILE **ffrom)
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{
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int i;
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pid_t pid;
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int pdto[2];
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int pdfrom[2];
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char *com;
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struct rlimit rl;
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if (pipe(pdto) < 0) {
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goto error1;
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}
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if (pipe(pdfrom) < 0) {
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goto error2;
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}
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switch (pid = fork()) {
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case -1:
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goto error3;
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case 0:
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/*
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* child: read from pdto[0], write into pdfrom[1]
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*/
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(void)close(0);
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(void)dup(pdto[0]);
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(void)close(1);
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(void)dup(pdfrom[1]);
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getrlimit(RLIMIT_NOFILE, &rl);
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for (i = rl.rlim_max - 1; i >= 3; i--) {
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(void) close(i);
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}
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com = malloc((unsigned) strlen(command) + 6);
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if (com == NULL) {
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_exit(~0);
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}
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(void)sprintf(com, "exec %s", command);
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execl(SHELL, basename(SHELL), "-c", com, (char *)NULL);
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_exit(~0);
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default:
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/*
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* parent: write into pdto[1], read from pdfrom[0]
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*/
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*fto = fdopen(pdto[1], "w");
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(void)close(pdto[0]);
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*ffrom = fdopen(pdfrom[0], "r");
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(void)close(pdfrom[1]);
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break;
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}
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return (pid);
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/*
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* error cleanup and return
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*/
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error3:
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(void)close(pdfrom[0]);
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(void)close(pdfrom[1]);
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error2:
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(void)close(pdto[0]);
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(void)close(pdto[1]);
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error1:
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return (-1);
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}
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static char *
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basename(char *path)
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{
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char *p;
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p = strrchr(path, '/');
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if (p == NULL) {
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return (path);
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} else {
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return (p + 1);
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}
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}
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#else /* YP */
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static int match(char *, char *);
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/*
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* Determine if requester is allowed to update the given map,
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* and update it if so. Returns the status, which is zero
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* if there is no access violation. This function updates
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* the local file and then shuts up.
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*/
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int
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localupdate(char *name, char *filename, u_int op, u_int keylen __unused,
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char *key, u_int datalen __unused, char *data)
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{
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char line[256];
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FILE *rf;
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FILE *wf;
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char *tmpname;
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int err;
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/*
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* Check permission
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*/
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if (strcmp(name, key) != 0) {
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return (ERR_ACCESS);
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}
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if (strcmp(name, "nobody") == 0) {
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/*
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* Can't change "nobody"s key.
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*/
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return (ERR_ACCESS);
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}
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/*
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* Open files
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*/
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tmpname = malloc(strlen(filename) + 4);
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if (tmpname == NULL) {
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return (ERR_MALLOC);
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}
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sprintf(tmpname, "%s.tmp", filename);
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rf = fopen(filename, "r");
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if (rf == NULL) {
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return (ERR_READ);
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}
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wf = fopen(tmpname, "w");
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if (wf == NULL) {
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return (ERR_WRITE);
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}
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err = -1;
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while (fgets(line, sizeof (line), rf)) {
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if (err < 0 && match(line, name)) {
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switch (op) {
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case YPOP_INSERT:
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err = ERR_KEY;
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break;
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case YPOP_STORE:
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case YPOP_CHANGE:
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fprintf(wf, "%s %s\n", key, data);
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err = 0;
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break;
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case YPOP_DELETE:
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/* do nothing */
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err = 0;
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break;
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}
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} else {
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fputs(line, wf);
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}
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}
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if (err < 0) {
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switch (op) {
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case YPOP_CHANGE:
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case YPOP_DELETE:
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err = ERR_KEY;
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break;
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case YPOP_INSERT:
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case YPOP_STORE:
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err = 0;
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fprintf(wf, "%s %s\n", key, data);
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break;
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}
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}
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fclose(wf);
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fclose(rf);
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if (err == 0) {
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if (rename(tmpname, filename) < 0) {
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return (ERR_DBASE);
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}
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} else {
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if (unlink(tmpname) < 0) {
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return (ERR_DBASE);
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}
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}
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return (err);
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}
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static int
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match(char *line, char *name)
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{
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int len;
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len = strlen(name);
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return (strncmp(line, name, len) == 0 &&
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(line[len] == ' ' || line[len] == '\t'));
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}
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#endif /* !YP */
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