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- /*
- * $XConsortium: process.c,v 1.42 92/02/18 18:05:00 gildea Exp $
- *
- * Copyright 1989 Massachusetts Institute of Technology
- *
- * Permission to use, copy, modify, and distribute this software and its
- * documentation for any purpose and without fee is hereby granted, provided
- * that the above copyright notice appear in all copies and that both that
- * copyright notice and this permission notice appear in supporting
- * documentation, and that the name of M.I.T. not be used in advertising
- * or publicity pertaining to distribution of the software without specific,
- * written prior permission. M.I.T. makes no representations about the
- * suitability of this software for any purpose. It is provided "as is"
- * without express or implied warranty.
- *
- * M.I.T. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL M.I.T.
- * BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
- * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
- * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
- * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
- *
- * Author: Jim Fulton, MIT X Consortium
- */
-
- #include "xauth.h"
- #include <ctype.h>
- #include <errno.h>
- extern int errno; /* for stupid errno.h files */
- #include <signal.h>
- #include <X11/X.h> /* for Family constants */
-
- extern char *get_hostname();
- extern Bool nameserver_timedout;
-
- #ifndef DEFAULT_PROTOCOL_ABBREV /* to make add command easier */
- #define DEFAULT_PROTOCOL_ABBREV "."
- #endif
- #ifndef DEFAULT_PROTOCOL /* for protocol abbreviation */
- #define DEFAULT_PROTOCOL "MIT-MAGIC-COOKIE-1"
- #endif
-
- #define SECURERPC "SUN-DES-1"
-
- #define XAUTH_DEFAULT_RETRIES 10 /* number of competitors we expect */
- #define XAUTH_DEFAULT_TIMEOUT 2 /* in seconds, be quick */
- #define XAUTH_DEFAULT_DEADTIME 600L /* 10 minutes in seconds */
-
- typedef struct _AuthList { /* linked list of entries */
- struct _AuthList *next;
- Xauth *auth;
- } AuthList;
-
- #define add_to_list(h,t,e) {if (t) (t)->next = (e); else (h) = (e); (t) = (e);}
-
- typedef struct _CommandTable { /* commands that are understood */
- char *name; /* full name */
- int minlen; /* unique prefix */
- int maxlen; /* strlen(name) */
- int (*processfunc)(); /* handler */
- char *helptext; /* what to print for help */
- } CommandTable;
-
- struct _extract_data { /* for iterating */
- FILE *fp; /* input source */
- char *filename; /* name of input */
- Bool used_stdout; /* whether or not need to close */
- Bool numeric; /* format in which to write */
- int nwritten; /* number of entries written */
- char *cmd; /* for error messages */
- };
-
- struct _list_data { /* for iterating */
- FILE *fp; /* output file */
- Bool numeric; /* format in which to write */
- };
-
-
- /*
- * private data
- */
- static char *stdin_filename = "(stdin)"; /* for messages */
- static char *stdout_filename = "(stdout)"; /* for messages */
- static char *Yes = "yes"; /* for messages */
- static char *No = "no"; /* for messages */
-
- static int do_list(), do_merge(), do_extract(), do_add(), do_remove();
- static int do_help(), do_source(), do_info(), do_exit();
- static int do_quit(), do_questionmark();
-
- static CommandTable command_table[] = { /* table of known commands */
- { "add", 2, 3, do_add,
- "add dpyname protoname hexkey add entry" },
- { "exit", 3, 4, do_exit,
- "exit save changes and exit program" },
- { "extract", 3, 7, do_extract,
- "extract filename dpyname... extract entries into file" },
- { "help", 1, 4, do_help,
- "help [topic] print help" },
- { "info", 1, 4, do_info,
- "info print information about entries" },
- { "list", 1, 4, do_list,
- "list [dpyname...] list entries" },
- { "merge", 1, 5, do_merge,
- "merge filename... merge entries from files" },
- { "nextract", 2, 8, do_extract,
- "nextract filename dpyname... numerically extract entries" },
- { "nlist", 2, 5, do_list,
- "nlist [dpyname...] numerically list entries" },
- { "nmerge", 2, 6, do_merge,
- "nmerge filename... numerically merge entries" },
- { "quit", 1, 4, do_quit,
- "quit abort changes and exit program" },
- { "remove", 1, 6, do_remove,
- "remove dpyname... remove entries" },
- { "source", 1, 6, do_source,
- "source filename read commands from file" },
- { "?", 1, 1, do_questionmark,
- "? list available commands" },
- { NULL, 0, 0, NULL, NULL },
- };
-
- #define COMMAND_NAMES_PADDED_WIDTH 10 /* wider than anything above */
-
-
- static Bool okay_to_use_stdin = True; /* set to false after using */
-
- static char *hex_table[] = { /* for printing hex digits */
- "00", "01", "02", "03", "04", "05", "06", "07",
- "08", "09", "0a", "0b", "0c", "0d", "0e", "0f",
- "10", "11", "12", "13", "14", "15", "16", "17",
- "18", "19", "1a", "1b", "1c", "1d", "1e", "1f",
- "20", "21", "22", "23", "24", "25", "26", "27",
- "28", "29", "2a", "2b", "2c", "2d", "2e", "2f",
- "30", "31", "32", "33", "34", "35", "36", "37",
- "38", "39", "3a", "3b", "3c", "3d", "3e", "3f",
- "40", "41", "42", "43", "44", "45", "46", "47",
- "48", "49", "4a", "4b", "4c", "4d", "4e", "4f",
- "50", "51", "52", "53", "54", "55", "56", "57",
- "58", "59", "5a", "5b", "5c", "5d", "5e", "5f",
- "60", "61", "62", "63", "64", "65", "66", "67",
- "68", "69", "6a", "6b", "6c", "6d", "6e", "6f",
- "70", "71", "72", "73", "74", "75", "76", "77",
- "78", "79", "7a", "7b", "7c", "7d", "7e", "7f",
- "80", "81", "82", "83", "84", "85", "86", "87",
- "88", "89", "8a", "8b", "8c", "8d", "8e", "8f",
- "90", "91", "92", "93", "94", "95", "96", "97",
- "98", "99", "9a", "9b", "9c", "9d", "9e", "9f",
- "a0", "a1", "a2", "a3", "a4", "a5", "a6", "a7",
- "a8", "a9", "aa", "ab", "ac", "ad", "ae", "af",
- "b0", "b1", "b2", "b3", "b4", "b5", "b6", "b7",
- "b8", "b9", "ba", "bb", "bc", "bd", "be", "bf",
- "c0", "c1", "c2", "c3", "c4", "c5", "c6", "c7",
- "c8", "c9", "ca", "cb", "cc", "cd", "ce", "cf",
- "d0", "d1", "d2", "d3", "d4", "d5", "d6", "d7",
- "d8", "d9", "da", "db", "dc", "dd", "de", "df",
- "e0", "e1", "e2", "e3", "e4", "e5", "e6", "e7",
- "e8", "e9", "ea", "eb", "ec", "ed", "ee", "ef",
- "f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7",
- "f8", "f9", "fa", "fb", "fc", "fd", "fe", "ff",
- };
-
- static unsigned int hexvalues[256]; /* for parsing hex input */
-
- static int original_umask = 0; /* for restoring */
-
-
- /*
- * private utility procedures
- */
-
- static void prefix (fn, n)
- char *fn;
- int n;
- {
- fprintf (stderr, "%s: %s:%d: ", ProgramName, fn, n);
- }
-
- static void baddisplayname (dpy, cmd)
- char *dpy, *cmd;
- {
- fprintf (stderr, "bad display name \"%s\" in \"%s\" command\n",
- dpy, cmd);
- }
-
- static void badcommandline (cmd)
- char *cmd;
- {
- fprintf (stderr, "bad \"%s\" command line\n", cmd);
- }
-
- static char *skip_space (s)
- register char *s;
- {
- if (!s) return NULL;
-
- for ( ; *s && isascii(*s) && isspace(*s); s++)
- ;
- return s;
- }
-
-
- static char *skip_nonspace (s)
- register char *s;
- {
- if (!s) return NULL;
-
- /* put quoting into loop if need be */
- for ( ; *s && isascii(*s) && !isspace(*s); s++)
- ;
- return s;
- }
-
- static char **split_into_words (src, argcp) /* argvify string */
- char *src;
- int *argcp;
- {
- char *jword;
- char savec;
- char **argv;
- int cur, total;
-
- *argcp = 0;
- #define WORDSTOALLOC 4 /* most lines are short */
- argv = (char **) malloc (WORDSTOALLOC * sizeof (char *));
- if (!argv) return NULL;
- cur = 0;
- total = WORDSTOALLOC;
-
- /*
- * split the line up into separate, nul-terminated tokens; the last
- * "token" will point to the empty string so that it can be bashed into
- * a null pointer.
- */
-
- do {
- jword = skip_space (src);
- src = skip_nonspace (jword);
- savec = *src;
- *src = '\0';
- if (cur == total) {
- total += WORDSTOALLOC;
- argv = (char **) realloc (argv, total * sizeof (char *));
- if (!argv) return NULL;
- }
- argv[cur++] = jword;
- if (savec) src++; /* if not last on line advance */
- } while (jword != src);
-
- argv[--cur] = NULL; /* smash empty token to end list */
- *argcp = cur;
- return argv;
- }
-
-
- static FILE *open_file (filenamep, mode, usedstdp, srcfn, srcln, cmd)
- char **filenamep;
- char *mode;
- Bool *usedstdp;
- char *srcfn;
- int srcln;
- char *cmd;
- {
- FILE *fp;
-
- if (strcmp (*filenamep, "-") == 0) {
- *usedstdp = True;
- /* select std descriptor to use */
- if (mode[0] == 'r') {
- if (okay_to_use_stdin) {
- okay_to_use_stdin = False;
- *filenamep = stdin_filename;
- return stdin;
- } else {
- prefix (srcfn, srcln);
- fprintf (stderr, "%s: stdin already in use\n", cmd);
- return NULL;
- }
- } else {
- *filenamep = stdout_filename;
- return stdout; /* always okay to use stdout */
- }
- }
-
- fp = fopen (*filenamep, mode);
- if (!fp) {
- prefix (srcfn, srcln);
- fprintf (stderr, "%s: unable to open file %s\n", cmd, *filenamep);
- }
- return fp;
- }
-
- static int getinput (fp)
- FILE *fp;
- {
- register int c;
-
- while ((c = getc (fp)) != EOF && isascii(c) && c != '\n' && isspace(c)) ;
- return c;
- }
-
- static int get_short (fp, sp) /* for reading numeric input */
- FILE *fp;
- unsigned short *sp;
- {
- int c;
- int i;
- unsigned short us = 0;
-
- /*
- * read family: written with %04x
- */
- for (i = 0; i < 4; i++) {
- switch (c = getinput (fp)) {
- case EOF:
- case '\n':
- return 0;
- }
- if (c < 0 || c > 255) return 0;
- us = (us * 16) + hexvalues[c]; /* since msb */
- }
- *sp = us;
- return 1;
- }
-
- static int get_bytes (fp, n, ptr) /* for reading numeric input */
- FILE *fp;
- unsigned int n;
- char **ptr;
- {
- char *s;
- register char *cp;
- int c1, c2;
-
- cp = s = malloc (n);
- if (!cp) return 0;
-
- while (n > 0) {
- if ((c1 = getinput (fp)) == EOF || c1 == '\n' ||
- (c2 = getinput (fp)) == EOF || c2 == '\n') {
- free (s);
- return 0;
- }
- *cp = (char) ((hexvalues[c1] * 16) + hexvalues[c2]);
- cp++;
- n--;
- }
-
- *ptr = s;
- return 1;
- }
-
-
- static Xauth *read_numeric (fp)
- FILE *fp;
- {
- Xauth *auth;
-
- auth = (Xauth *) malloc (sizeof (Xauth));
- if (!auth) goto bad;
- auth->family = 0;
- auth->address = NULL;
- auth->address_length = 0;
- auth->number = NULL;
- auth->number_length = 0;
- auth->name = NULL;
- auth->name_length = 0;
- auth->data = NULL;
- auth->data_length = 0;
-
- if (!get_short (fp, (unsigned short *) &auth->family))
- goto bad;
- if (!get_short (fp, (unsigned short *) &auth->address_length))
- goto bad;
- if (!get_bytes (fp, (unsigned int) auth->address_length, &auth->address))
- goto bad;
- if (!get_short (fp, (unsigned short *) &auth->number_length))
- goto bad;
- if (!get_bytes (fp, (unsigned int) auth->number_length, &auth->number))
- goto bad;
- if (!get_short (fp, (unsigned short *) &auth->name_length))
- goto bad;
- if (!get_bytes (fp, (unsigned int) auth->name_length, &auth->name))
- goto bad;
- if (!get_short (fp, (unsigned short *) &auth->data_length))
- goto bad;
- if (!get_bytes (fp, (unsigned int) auth->data_length, &auth->data))
- goto bad;
-
- switch (getinput (fp)) { /* get end of line */
- case EOF:
- case '\n':
- return auth;
- }
-
- bad:
- if (auth) XauDisposeAuth (auth); /* won't free null pointers */
- return NULL;
- }
-
- static int read_auth_entries (fp, numeric, headp, tailp)
- FILE *fp;
- Bool numeric;
- AuthList **headp, **tailp;
- {
- Xauth *((*readfunc)()) = (numeric ? read_numeric : XauReadAuth);
- Xauth *auth;
- AuthList *head, *tail;
- int n;
-
- head = tail = NULL;
- n = 0;
- /* put all records into linked list */
- while ((auth = ((*readfunc) (fp))) != NULL) {
- AuthList *l = (AuthList *) malloc (sizeof (AuthList));
- if (!l) {
- fprintf (stderr,
- "%s: unable to alloc entry reading auth file\n",
- ProgramName);
- exit (1);
- }
- l->next = NULL;
- l->auth = auth;
- if (tail) /* if not first time through append */
- tail->next = l;
- else
- head = l; /* first time through, so assign */
- tail = l;
- n++;
- }
- *headp = head;
- *tailp = tail;
- return n;
- }
-
- static Bool get_displayname_auth (displayname, auth)
- char *displayname;
- Xauth *auth; /* fill in */
- {
- int family;
- char *host = NULL, *rest = NULL;
- int dpynum, scrnum;
- char *cp;
- int len;
- extern char *get_address_info();
- Xauth proto;
- int prelen = 0;
-
- /*
- * check to see if the display name is of the form "host/unix:"
- * which is how the list routine prints out local connections
- */
- cp = index (displayname, '/');
- if (cp && strncmp (cp, "/unix:", 6) == 0)
- prelen = (cp - displayname);
-
- if (!parse_displayname (displayname + ((prelen > 0) ? prelen + 1 : 0),
- &family, &host, &dpynum, &scrnum, &rest)) {
- return False;
- }
-
- proto.family = family;
- proto.address = get_address_info (family, displayname, prelen, host, &len);
- if (proto.address) {
- char buf[40]; /* want to hold largest display num */
-
- proto.address_length = len;
- buf[0] = '\0';
- sprintf (buf, "%d", dpynum);
- proto.number_length = strlen (buf);
- if (proto.number_length <= 0) {
- free (proto.address);
- proto.address = NULL;
- } else {
- proto.number = copystring (buf, proto.number_length);
- }
- }
-
- if (host) free (host);
- if (rest) free (rest);
-
- if (proto.address) {
- auth->family = proto.family;
- auth->address = proto.address;
- auth->address_length = proto.address_length;
- auth->number = proto.number;
- auth->number_length = proto.number_length;
- auth->name = NULL;
- auth->name_length = 0;
- auth->data = NULL;
- auth->data_length = 0;
- return True;
- } else {
- return False;
- }
- }
-
- static int cvthexkey (hexstr, ptrp) /* turn hex key string into octets */
- char *hexstr;
- char **ptrp;
- {
- int i;
- int len = 0;
- char *retval, *s;
- unsigned char *us;
- char c;
- char savec = '\0';
-
- /* count */
- for (s = hexstr; *s; s++) {
- if (!isascii(*s)) return -1;
- if (isspace(*s)) continue;
- if (!isxdigit(*s)) return -1;
- len++;
- }
-
- /* if odd then there was an error */
- if ((len & 1) == 1) return -1;
-
-
- /* now we know that the input is good */
- len >>= 1;
- retval = malloc (len);
- if (!retval) {
- fprintf (stderr, "%s: unable to allocate %d bytes for hexkey\n",
- ProgramName, len);
- return -1;
- }
-
- for (us = (unsigned char *) retval, i = len; i > 0; hexstr++) {
- c = *hexstr;
- if (isspace(c)) continue; /* already know it is ascii */
- if (isupper(c))
- c = tolower(c);
- if (savec) {
- #define atoh(c) ((c) - (((c) >= '0' && (c) <= '9') ? '0' : ('a'-10)))
- *us = (unsigned char)((atoh(savec) << 4) + atoh(c));
- #undef atoh
- savec = 0; /* ready for next character */
- us++;
- i--;
- } else {
- savec = c;
- }
- }
- *ptrp = retval;
- return len;
- }
-
- static int dispatch_command (inputfilename, lineno, argc, argv, tab, statusp)
- char *inputfilename;
- int lineno;
- int argc;
- char **argv;
- CommandTable *tab;
- int *statusp;
- {
- CommandTable *ct;
- char *cmd;
- int n;
- /* scan table for command */
- cmd = argv[0];
- n = strlen (cmd);
- for (ct = tab; ct->name; ct++) {
- /* look for unique prefix */
- if (n >= ct->minlen && n <= ct->maxlen &&
- strncmp (cmd, ct->name, n) == 0) {
- *statusp = (*(ct->processfunc))(inputfilename, lineno, argc, argv);
- return 1;
- }
- }
-
- *statusp = 1;
- return 0;
- }
-
-
- static AuthList *xauth_head = NULL; /* list of auth entries */
- static Bool xauth_existed = False; /* if was present at initialize */
- static Bool xauth_modified = False; /* if added, removed, or merged */
- static Bool xauth_allowed = True; /* if allowed to write auth file */
- static char *xauth_filename = NULL;
- static Bool dieing = False;
-
- #ifdef SIGNALRETURNSINT
- #define _signal_t int
- #else
- #define _signal_t void
- #endif
-
- /* ARGSUSED */
- static _signal_t die (sig)
- int sig;
- {
- dieing = True;
- exit (auth_finalize ());
- /* NOTREACHED */
- #ifdef SIGNALRETURNSINT
- return -1; /* for picky compilers */
- #endif
- }
-
- static _signal_t catchsig (sig)
- int sig;
- {
- #ifdef SYSV
- if (sig > 0) signal (sig, die); /* re-establish signal handler */
- #endif
- if (verbose && xauth_modified) printf ("\r\n");
- die (sig);
- /* NOTREACHED */
- #ifdef SIGNALRETURNSINT
- return -1; /* for picky compilers */
- #endif
- }
-
- static void register_signals ()
- {
- signal (SIGINT, catchsig);
- signal (SIGTERM, catchsig);
- signal (SIGHUP, catchsig);
- return;
- }
-
-
- /*
- * public procedures for parsing lines of input
- */
-
- int auth_initialize (authfilename)
- char *authfilename;
- {
- int n;
- AuthList *head, *tail;
- FILE *authfp;
- Bool exists;
-
- register_signals ();
-
- bzero ((char *) hexvalues, sizeof hexvalues);
- hexvalues['0'] = 0;
- hexvalues['1'] = 1;
- hexvalues['2'] = 2;
- hexvalues['3'] = 3;
- hexvalues['4'] = 4;
- hexvalues['5'] = 5;
- hexvalues['6'] = 6;
- hexvalues['7'] = 7;
- hexvalues['8'] = 8;
- hexvalues['9'] = 9;
- hexvalues['a'] = hexvalues['A'] = 0xa;
- hexvalues['b'] = hexvalues['B'] = 0xb;
- hexvalues['c'] = hexvalues['C'] = 0xc;
- hexvalues['d'] = hexvalues['D'] = 0xd;
- hexvalues['e'] = hexvalues['E'] = 0xe;
- hexvalues['f'] = hexvalues['F'] = 0xf;
-
- if (break_locks && verbose) {
- printf ("Attempting to break locks on authority file %s\n",
- authfilename);
- }
-
- if (ignore_locks) {
- if (break_locks) XauUnlockAuth (authfilename);
- } else {
- n = XauLockAuth (authfilename, XAUTH_DEFAULT_RETRIES,
- XAUTH_DEFAULT_TIMEOUT,
- (break_locks ? 0L : XAUTH_DEFAULT_DEADTIME));
- if (n != LOCK_SUCCESS) {
- char *reason = "unknown error";
- switch (n) {
- case LOCK_ERROR:
- reason = "error";
- break;
- case LOCK_TIMEOUT:
- reason = "timeout";
- break;
- }
- fprintf (stderr, "%s: %s in locking authority file %s\n",
- ProgramName, reason, authfilename);
- return -1;
- }
- }
-
- /* these checks can only be done reliably after the file is locked */
- exists = (access (authfilename, F_OK) == 0);
- if (exists && access (authfilename, W_OK) != 0) {
- fprintf (stderr,
- "%s: %s not writable, changes will be ignored\n",
- ProgramName, authfilename);
- xauth_allowed = False;
- }
-
- original_umask = umask (0077); /* disallow non-owner access */
-
- authfp = fopen (authfilename, "r");
- if (!authfp) {
- int olderrno = errno;
-
- /* if file there then error */
- if (access (authfilename, F_OK) == 0) { /* then file does exist! */
- errno = olderrno;
- return -1;
- } /* else ignore it */
- fprintf (stderr,
- "%s: creating new authority file %s\n",
- ProgramName, authfilename);
- } else {
- xauth_existed = True;
- n = read_auth_entries (authfp, False, &head, &tail);
- (void) fclose (authfp);
- if (n < 0) {
- fprintf (stderr,
- "%s: unable to read auth entries from file \"%s\"\n",
- ProgramName, authfilename);
- return -1;
- }
- xauth_head = head;
- }
-
- n = strlen (authfilename);
- xauth_filename = malloc (n + 1);
- if (xauth_filename) strcpy (xauth_filename, authfilename);
- xauth_modified = False;
-
- if (verbose) {
- printf ("%s authority file %s\n",
- ignore_locks ? "Ignoring locks on" : "Using", authfilename);
- }
- return 0;
- }
-
- static int write_auth_file (tmpnam)
- char *tmpnam;
- {
- FILE *fp;
- AuthList *list;
-
- /*
- * xdm and auth spec assumes auth file is 12 or fewer characters
- */
- strcpy (tmpnam, xauth_filename);
- strcat (tmpnam, "-n"); /* for new */
- (void) unlink (tmpnam);
- fp = fopen (tmpnam, "w"); /* umask is still set to 0077 */
- if (!fp) {
- fprintf (stderr, "%s: unable to open tmp file \"%s\"\n",
- ProgramName, tmpnam);
- return -1;
- }
-
- /*
- * Write MIT-MAGIC-COOKIE-1 first, because R4 Xlib knows
- * only that and uses the first authorization it finds.
- */
- for (list = xauth_head; list; list = list->next) {
- if (list->auth->name_length == 18
- && strncmp(list->auth->name, "MIT-MAGIC-COOKIE-1", 18) == 0)
- {
- XauWriteAuth (fp, list->auth);
- }
- }
- for (list = xauth_head; list; list = list->next) {
- if (list->auth->name_length != 18
- || strncmp(list->auth->name, "MIT-MAGIC-COOKIE-1", 18) != 0)
- {
- XauWriteAuth (fp, list->auth);
- }
- }
-
- (void) fclose (fp);
- return 0;
- }
-
- int auth_finalize ()
- {
- char tmpnam[1024]; /* large filename size */
-
- if (xauth_modified) {
- if (dieing) {
- if (verbose) {
- printf ("Aborting changes to authority file %s\n",
- xauth_filename);
- }
- } else if (!xauth_allowed) {
- fprintf (stderr,
- "%s: %s not writable, changes ignored\n",
- ProgramName, xauth_filename);
- } else {
- if (verbose) {
- printf ("%s authority file %s\n",
- ignore_locks ? "Ignoring locks and writing" :
- "Writing", xauth_filename);
- }
- tmpnam[0] = '\0';
- if (write_auth_file (tmpnam) == -1) {
- fprintf (stderr,
- "%s: unable to write authority file %s\n",
- ProgramName, tmpnam);
- } else {
- (void) unlink (xauth_filename);
- if (link (tmpnam, xauth_filename) == -1) {
- fprintf (stderr,
- "%s: unable to link authority file %s, use %s\n",
- ProgramName, xauth_filename, tmpnam);
- } else {
- (void) unlink (tmpnam);
- }
- }
- }
- }
-
- if (!ignore_locks) {
- XauUnlockAuth (xauth_filename);
- }
- (void) umask (original_umask);
- return 0;
- }
-
- int process_command (inputfilename, lineno, argc, argv)
- char *inputfilename;
- int lineno;
- int argc;
- char **argv;
- {
- int status;
-
- if (argc < 1 || !argv || !argv[0]) return 1;
-
- if (dispatch_command (inputfilename, lineno, argc, argv,
- command_table, &status))
- return status;
-
- prefix (inputfilename, lineno);
- fprintf (stderr, "unknown command \"%s\"\n", argv[0]);
- return 1;
- }
-
-
- /*
- * utility routines
- */
-
- static void fprintfhex (fp, len, cp)
- register FILE *fp;
- unsigned int len;
- char *cp;
- {
- unsigned char *ucp = (unsigned char *) cp;
-
- for (; len > 0; len--, ucp++) {
- register char *s = hex_table[*ucp];
- putc (s[0], fp);
- putc (s[1], fp);
- }
- return;
- }
-
- dump_numeric (fp, auth)
- register FILE *fp;
- register Xauth *auth;
- {
- fprintf (fp, "%04x", auth->family); /* unsigned short */
- fprintf (fp, " %04x ", auth->address_length); /* short */
- fprintfhex (fp, auth->address_length, auth->address);
- fprintf (fp, " %04x ", auth->number_length); /* short */
- fprintfhex (fp, auth->number_length, auth->number);
- fprintf (fp, " %04x ", auth->name_length); /* short */
- fprintfhex (fp, auth->name_length, auth->name);
- fprintf (fp, " %04x ", auth->data_length); /* short */
- fprintfhex (fp, auth->data_length, auth->data);
- putc ('\n', fp);
- return;
- }
-
- /* ARGSUSED */
- static int dump_entry (inputfilename, lineno, auth, data)
- char *inputfilename;
- int lineno;
- Xauth *auth;
- char *data;
- {
- struct _list_data *ld = (struct _list_data *) data;
- FILE *fp = ld->fp;
-
- if (ld->numeric) {
- dump_numeric (fp, auth);
- } else {
- char *dpyname = NULL;
-
- switch (auth->family) {
- case FamilyLocal:
- fwrite (auth->address, sizeof (char), auth->address_length, fp);
- fprintf (fp, "/unix");
- break;
- case FamilyInternet:
- case FamilyDECnet:
- dpyname = get_hostname (auth);
- if (dpyname) {
- fprintf (fp, "%s", dpyname);
- break;
- }
- /* else fall through to default */
- default:
- fprintf (fp, "#%04x#", auth->family);
- fprintfhex (fp, auth->address_length, auth->address);
- putc ('#', fp);
- }
- putc (':', fp);
- fwrite (auth->number, sizeof (char), auth->number_length, fp);
- putc (' ', fp);
- putc (' ', fp);
- fwrite (auth->name, sizeof (char), auth->name_length, fp);
- putc (' ', fp);
- putc (' ', fp);
- if (!strncmp(auth->name, SECURERPC, auth->name_length))
- fwrite (auth->data, sizeof (char), auth->data_length, fp);
- else
- fprintfhex (fp, auth->data_length, auth->data);
- putc ('\n', fp);
- }
- return 0;
- }
-
- static int extract_entry (inputfilename, lineno, auth, data)
- char *inputfilename;
- int lineno;
- Xauth *auth;
- char *data;
- {
- struct _extract_data *ed = (struct _extract_data *) data;
-
- if (!ed->fp) {
- ed->fp = open_file (&ed->filename, "w", &ed->used_stdout,
- inputfilename, lineno, ed->cmd);
- if (!ed->fp) {
- prefix (inputfilename, lineno);
- fprintf (stderr,
- "unable to open extraction file \"%s\"\n",
- ed->filename);
- return -1;
- }
- }
- (*(ed->numeric ? dump_numeric : XauWriteAuth)) (ed->fp, auth);
- ed->nwritten++;
-
- return 0;
- }
-
-
- static int match_auth_dpy (a, b)
- register Xauth *a, *b;
- {
- return ((a->family == b->family &&
- a->address_length == b->address_length &&
- a->number_length == b->number_length &&
- bcmp (a->address, b->address, a->address_length) == 0 &&
- bcmp (a->number, b->number, a->number_length) == 0) ? 1 : 0);
- }
-
- /* return non-zero iff display and authorization type are the same */
-
- static int match_auth (a, b)
- register Xauth *a, *b;
- {
- return ((match_auth_dpy(a, b)
- && a->name_length == b->name_length
- && bcmp(a->name, b->name, a->name_length) == 0) ? 1 : 0);
- }
-
-
- static int merge_entries (firstp, second, nnewp, nreplp)
- AuthList **firstp, *second;
- int *nnewp, *nreplp;
- {
- AuthList *a, *b, *first, *tail;
- int n = 0, nnew = 0, nrepl = 0;
-
- if (!second) return 0;
-
- if (!*firstp) { /* if nothing to merge into */
- *firstp = second;
- for (tail = *firstp, n = 1; tail->next; n++, tail = tail->next) ;
- *nnewp = n;
- *nreplp = 0;
- return n;
- }
-
- first = *firstp;
- /*
- * find end of first list and stick second list on it
- */
- for (tail = first; tail->next; tail = tail->next) ;
- tail->next = second;
-
- /*
- * run down list freeing duplicate entries; if an entry is okay, then
- * bump the tail up to include it, otherwise, cut the entry out of
- * the chain.
- */
- for (b = second; b; ) {
- AuthList *next = b->next; /* in case we free it */
-
- a = first;
- for (;;) {
- if (match_auth (a->auth, b->auth)) { /* found a duplicate */
- AuthList tmp; /* swap it in for old one */
- tmp = *a;
- *a = *b;
- *b = tmp;
- a->next = b->next;
- XauDisposeAuth (b->auth);
- free ((char *) b);
- b = NULL;
- tail->next = next;
- nrepl++;
- nnew--;
- break;
- }
- if (a == tail) break; /* if have looked at left side */
- a = a->next;
- }
- if (b) { /* if we didn't remove it */
- tail = b; /* bump end of first list */
- }
- b = next;
- n++;
- nnew++;
- }
-
- *nnewp = nnew;
- *nreplp = nrepl;
- return n;
-
- }
-
-
- static int iterdpy (inputfilename, lineno, start,
- argc, argv, yfunc, nfunc, data)
- char *inputfilename;
- int lineno;
- int start;
- int argc;
- char *argv[];
- int (*yfunc)(), (*nfunc)();
- char *data;
- {
- int i;
- int status;
- int errors = 0;
- Xauth proto;
- AuthList *l, *next;
-
- /*
- * iterate
- */
- for (i = start; i < argc; i++) {
- char *displayname = argv[i];
- proto.address = proto.number = NULL;
- if (!get_displayname_auth (displayname, &proto)) {
- prefix (inputfilename, lineno);
- baddisplayname (displayname, argv[0]);
- errors++;
- continue;
- }
- status = 0;
- for (l = xauth_head; l; l = next) {
- next = l->next;
- if (match_auth_dpy (&proto, l->auth)) {
- if (yfunc) {
- status = (*yfunc) (inputfilename, lineno,
- l->auth, data);
- if (status < 0) break;
- }
- } else {
- if (nfunc) {
- status = (*nfunc) (inputfilename, lineno,
- l->auth, data);
- if (status < 0) break;
- }
- }
- }
- if (proto.address) free (proto.address);
- if (proto.number) free (proto.number);
- if (status < 0) {
- errors -= status; /* since status is negative */
- break;
- }
- }
-
- return errors;
- }
-
- /* ARGSUSED */
- static int remove_entry (inputfilename, lineno, auth, data)
- char *inputfilename;
- int lineno;
- Xauth *auth;
- char *data;
- {
- int *nremovedp = (int *) data;
- AuthList **listp = &xauth_head;
- AuthList *list;
-
- /*
- * unlink the auth we were asked to
- */
- while ((list = *listp)->auth != auth)
- listp = &list->next;
- *listp = list->next;
- XauDisposeAuth (list->auth); /* free the auth */
- free (list); /* free the link */
- xauth_modified = True;
- (*nremovedp)++;
- return 1;
- }
-
- /*
- * action routines
- */
-
- /*
- * help
- */
- int print_help (fp, cmd, prefix)
- FILE *fp;
- char *cmd;
- char *prefix;
- {
- CommandTable *ct;
- int n = 0;
-
- if (!prefix) prefix = "";
-
- if (!cmd) { /* if no cmd, print all help */
- for (ct = command_table; ct->name; ct++) {
- fprintf (fp, "%s%s\n", prefix, ct->helptext);
- n++;
- }
- } else {
- int len = strlen (cmd);
- for (ct = command_table; ct->name; ct++) {
- if (strncmp (cmd, ct->name, len) == 0) {
- fprintf (fp, "%s%s\n", prefix, ct->helptext);
- n++;
- }
- }
- }
-
- return n;
- }
-
- static int do_help (inputfilename, lineno, argc, argv)
- char *inputfilename;
- int lineno;
- int argc;
- char **argv;
- {
- char *cmd = (argc > 1 ? argv[1] : NULL);
- int n;
-
- n = print_help (stdout, cmd, " "); /* a nice amount */
-
- if (n < 0 || (n == 0 && !cmd)) {
- prefix (inputfilename, lineno);
- fprintf (stderr, "internal error with help");
- if (cmd) {
- fprintf (stderr, " on command \"%s\"", cmd);
- }
- fprintf (stderr, "\n");
- return 1;
- }
-
- if (n == 0) {
- prefix (inputfilename, lineno);
- /* already know that cmd is set in this case */
- fprintf (stderr, "no help for noexistent command \"%s\"\n", cmd);
- }
-
- return 0;
- }
-
- /*
- * questionmark
- */
- /* ARGSUSED */
- static int do_questionmark (inputfilename, lineno, argc, argv)
- char *inputfilename;
- int lineno;
- int argc;
- char **argv;
- {
- CommandTable *ct;
- int i;
- #define WIDEST_COLUMN 72
- int col = WIDEST_COLUMN;
-
- printf ("Commands:\n");
- for (ct = command_table; ct->name; ct++) {
- if ((col + ct->maxlen) > WIDEST_COLUMN) {
- if (ct != command_table) {
- putc ('\n', stdout);
- }
- fputs (" ", stdout);
- col = 8; /* length of string above */
- }
- fputs (ct->name, stdout);
- col += ct->maxlen;
- for (i = ct->maxlen; i < COMMAND_NAMES_PADDED_WIDTH; i++) {
- putc (' ', stdout);
- col++;
- }
- }
- if (col != 0) {
- putc ('\n', stdout);
- }
-
- /* allow bad lines since this is help */
- return 0;
- }
-
- /*
- * list [displayname ...]
- */
- static int do_list (inputfilename, lineno, argc, argv)
- char *inputfilename;
- int lineno;
- int argc;
- char **argv;
- {
- struct _list_data ld;
-
- ld.fp = stdout;
- ld.numeric = (argv[0][0] == 'n');
-
- if (argc == 1) {
- register AuthList *l;
-
- if (xauth_head) {
- for (l = xauth_head; l; l = l->next) {
- dump_entry (inputfilename, lineno, l->auth, (char *) &ld);
- }
- }
- return 0;
- }
-
- return iterdpy (inputfilename, lineno, 1, argc, argv,
- dump_entry, NULL, (char *) &ld);
- }
-
- /*
- * merge filename [filename ...]
- */
- static int do_merge (inputfilename, lineno, argc, argv)
- char *inputfilename;
- int lineno;
- int argc;
- char **argv;
- {
- int i;
- int errors = 0;
- AuthList *head, *tail, *listhead, *listtail;
- int nentries, nnew, nrepl;
- Bool numeric = False;
-
- if (argc < 2) {
- prefix (inputfilename, lineno);
- badcommandline (argv[0]);
- return 1;
- }
-
- if (argv[0][0] == 'n') numeric = True;
- listhead = listtail = NULL;
-
- for (i = 1; i < argc; i++) {
- char *filename = argv[i];
- FILE *fp;
- Bool used_stdin = False;
-
- fp = open_file (&filename, "r", &used_stdin, inputfilename, lineno,
- argv[0]);
- if (!fp) {
- errors++;
- continue;
- }
-
- head = tail = NULL;
- nentries = read_auth_entries (fp, numeric, &head, &tail);
- if (nentries == 0) {
- prefix (inputfilename, lineno);
- fprintf (stderr, "unable to read any entries from file \"%s\"\n",
- filename);
- errors++;
- } else { /* link it in */
- add_to_list (listhead, listtail, head);
- }
-
- if (!used_stdin) (void) fclose (fp);
- }
-
- /*
- * if we have new entries, merge them in (freeing any duplicates)
- */
- if (listhead) {
- nentries = merge_entries (&xauth_head, listhead, &nnew, &nrepl);
- if (verbose)
- printf ("%d entries read in: %d new, %d replacement%s\n",
- nentries, nnew, nrepl, nrepl != 1 ? "s" : "");
- if (nentries > 0) xauth_modified = True;
- }
-
- return 0;
- }
-
- /*
- * extract filename displayname [displayname ...]
- */
- static int do_extract (inputfilename, lineno, argc, argv)
- char *inputfilename;
- int lineno;
- int argc;
- char **argv;
- {
- int errors;
- struct _extract_data ed;
-
- if (argc < 3) {
- prefix (inputfilename, lineno);
- badcommandline (argv[0]);
- return 1;
- }
-
- ed.fp = NULL;
- ed.filename = argv[1];
- ed.numeric = (argv[0][0] == 'n');
- ed.nwritten = 0;
- ed.cmd = argv[0];
-
- errors = iterdpy (inputfilename, lineno, 2, argc, argv,
- extract_entry, NULL, (char *) &ed);
-
- if (!ed.fp) {
- fprintf (stderr,
- "No matches found, authority file \"%s\" not written\n",
- ed.filename);
- } else {
- if (verbose) {
- printf ("%d entries written to \"%s\"\n",
- ed.nwritten, ed.filename);
- }
- if (!ed.used_stdout) {
- (void) fclose (ed.fp);
- }
- }
-
- return errors;
- }
-
-
- /*
- * add displayname protocolname hexkey
- */
- static int do_add (inputfilename, lineno, argc, argv)
- char *inputfilename;
- int lineno;
- int argc;
- char **argv;
- {
- int n, nnew, nrepl;
- int len;
- char *dpyname;
- char *protoname;
- char *hexkey;
- char *key;
- Xauth *auth;
- AuthList *list;
-
- if (argc != 4 || !argv[1] || !argv[2] || !argv[3]) {
- prefix (inputfilename, lineno);
- badcommandline (argv[0]);
- return 1;
- }
-
- dpyname = argv[1];
- protoname = argv[2];
- hexkey = argv[3];
-
- len = strlen(hexkey);
- if (hexkey[0] == '"' && hexkey[len-1] == '"') {
- key = malloc(len-1);
- strncpy(key, hexkey+1, len-2);
- len -= 2;
- } else if (!strcmp(protoname, SECURERPC)) {
- key = malloc(len+1);
- strcpy(key, hexkey);
- } else {
- len = cvthexkey (hexkey, &key);
- if (len < 0) {
- prefix (inputfilename, lineno);
- fprintf (stderr,
- "key contains odd number of or non-hex characters\n");
- return 1;
- }
- }
-
- auth = (Xauth *) malloc (sizeof (Xauth));
- if (!auth) {
- prefix (inputfilename, lineno);
- fprintf (stderr, "unable to allocate %d bytes for Xauth structure\n",
- sizeof (Xauth));
- free (key);
- return 1;
- }
-
- if (!get_displayname_auth (dpyname, auth)) {
- prefix (inputfilename, lineno);
- baddisplayname (dpyname, argv[0]);
- free (auth);
- free (key);
- return 1;
- }
-
- /*
- * allow an abbreviation for common protocol names
- */
- if (strcmp (protoname, DEFAULT_PROTOCOL_ABBREV) == 0) {
- protoname = DEFAULT_PROTOCOL;
- }
-
- auth->name_length = strlen (protoname);
- auth->name = copystring (protoname, auth->name_length);
- if (!auth->name) {
- prefix (inputfilename, lineno);
- fprintf (stderr, "unable to allocate %d character protocol name\n",
- auth->name_length);
- free (auth);
- free (key);
- return 1;
- }
- auth->data_length = len;
- auth->data = key;
-
- list = (AuthList *) malloc (sizeof (AuthList));
- if (!list) {
- prefix (inputfilename, lineno);
- fprintf (stderr, "unable to allocate %d bytes for auth list\n",
- sizeof (AuthList));
- free (auth);
- free (key);
- free (auth->name);
- return 1;
- }
-
- list->next = NULL;
- list->auth = auth;
-
- /*
- * merge it in; note that merge will deal with allocation
- */
- n = merge_entries (&xauth_head, list, &nnew, &nrepl);
- if (n <= 0) {
- prefix (inputfilename, lineno);
- fprintf (stderr, "unable to merge in added record\n");
- return 1;
- }
-
- xauth_modified = True;
- return 0;
- }
-
- /*
- * remove displayname
- */
- static int do_remove (inputfilename, lineno, argc, argv)
- char *inputfilename;
- int lineno;
- int argc;
- char **argv;
- {
- int nremoved = 0;
- int errors;
-
- if (argc < 2) {
- prefix (inputfilename, lineno);
- badcommandline (argv[0]);
- return 1;
- }
-
- errors = iterdpy (inputfilename, lineno, 1, argc, argv,
- remove_entry, NULL, (char *) &nremoved);
- if (verbose) printf ("%d entries removed\n", nremoved);
- return errors;
- }
-
- /*
- * info
- */
- static int do_info (inputfilename, lineno, argc, argv)
- char *inputfilename;
- int lineno;
- int argc;
- char **argv;
- {
- int n;
- AuthList *l;
-
- if (argc != 1) {
- prefix (inputfilename, lineno);
- badcommandline (argv[0]);
- return 1;
- }
-
- for (l = xauth_head, n = 0; l; l = l->next, n++) ;
-
- printf ("Authority file: %s\n",
- xauth_filename ? xauth_filename : "(none)");
- printf ("File new: %s\n", xauth_existed ? No : Yes);
- printf ("File locked: %s\n", ignore_locks ? No : Yes);
- printf ("Number of entries: %d\n", n);
- printf ("Changes honored: %s\n", xauth_allowed ? Yes : No);
- printf ("Changes made: %s\n", xauth_modified ? Yes : No);
- printf ("Current input: %s:%d\n", inputfilename, lineno);
- return 0;
- }
-
-
- /*
- * exit
- */
- static Bool alldone = False;
-
- /* ARGSUSED */
- static int do_exit (inputfilename, lineno, argc, argv)
- char *inputfilename;
- int lineno;
- int argc;
- char **argv;
- {
- /* allow bogus stuff */
- alldone = True;
- return 0;
- }
-
- /*
- * quit
- */
- /* ARGSUSED */
- static int do_quit (inputfilename, lineno, argc, argv)
- char *inputfilename;
- int lineno;
- int argc;
- char **argv;
- {
- /* allow bogus stuff */
- die (0);
- /* NOTREACHED */
- return -1; /* for picky compilers */
- }
-
-
- /*
- * source filename
- */
- static int do_source (inputfilename, lineno, argc, argv)
- char *inputfilename;
- int lineno;
- int argc;
- char **argv;
- {
- char *script;
- char buf[BUFSIZ];
- FILE *fp;
- Bool used_stdin = False;
- int len;
- int errors = 0, status;
- int sublineno = 0;
- char **subargv;
- int subargc;
- Bool prompt = False; /* only true if reading from tty */
-
- if (argc != 2 || !argv[1]) {
- prefix (inputfilename, lineno);
- badcommandline (argv[0]);
- return 1;
- }
-
- script = argv[1];
-
- fp = open_file (&script, "r", &used_stdin, inputfilename, lineno, argv[0]);
- if (!fp) {
- return 1;
- }
-
- if (verbose && used_stdin && isatty (fileno (fp))) prompt = True;
-
- while (!alldone) {
- buf[0] = '\0';
- if (prompt) {
- printf ("xauth> ");
- fflush (stdout);
- }
- if (fgets (buf, sizeof buf, fp) == NULL) break;
- sublineno++;
- len = strlen (buf);
- if (len == 0 || buf[0] == '#') continue;
- if (buf[len-1] != '\n') {
- prefix (script, sublineno);
- fprintf (stderr, "line too long\n");
- errors++;
- break;
- }
- buf[--len] = '\0'; /* remove new line */
- subargv = split_into_words (buf, &subargc);
- if (subargv) {
- status = process_command (script, sublineno, subargc, subargv);
- free ((char *) subargv);
- errors += status;
- } else {
- prefix (script, sublineno);
- fprintf (stderr, "unable to break line into words\n");
- errors++;
- }
- }
-
- if (!used_stdin) {
- (void) fclose (fp);
- }
- return errors;
- }
-