+/*
+ * Copyright (c) 1985, 1988 Regents of the University of California.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that the above copyright notice and this paragraph are
+ * duplicated in all such forms and that any documentation,
+ * advertising materials, and other materials related to such
+ * distribution and use acknowledge that the software was developed
+ * by the University of California, Berkeley. The name of the
+ * University may not be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * @(#)ftpcmd.y 5.20.1.1 (Berkeley) 3/2/89
+ */
+
+/*
+ * Grammar for FTP commands.
+ * See RFC 959.
+ */
+
+%{
+
+#ifndef lint
+static char sccsid[] = "@(#)ftpcmd.y 5.20.1.1 (Berkeley) 3/2/89";
+#endif /* not lint */
+
+#include <sys/param.h>
+#include <sys/socket.h>
+
+#include <netinet/in.h>
+
+#include <arpa/ftp.h>
+
+#include <stdio.h>
+#include <signal.h>
+#include <ctype.h>
+#include <pwd.h>
+#include <setjmp.h>
+#include <syslog.h>
+#include <sys/stat.h>
+#include <time.h>
+
+extern struct sockaddr_in data_dest;
+extern int logged_in;
+extern struct passwd *pw;
+extern int guest;
+extern int logging;
+extern int type;
+extern int form;
+extern int debug;
+extern int timeout;
+extern int maxtimeout;
+extern int pdata;
+extern char hostname[], remotehost[];
+extern char proctitle[];
+extern char *globerr;
+extern int usedefault;
+extern int transflag;
+extern char tmpline[];
+char **glob();
+
+static int cmd_type;
+static int cmd_form;
+static int cmd_bytesz;
+char cbuf[512];
+char *fromname;
+
+char *index();
+%}
+
+%token
+ A B C E F I
+ L N P R S T
+
+ SP CRLF COMMA STRING NUMBER
+
+ USER PASS ACCT REIN QUIT PORT
+ PASV TYPE STRU MODE RETR STOR
+ APPE MLFL MAIL MSND MSOM MSAM
+ MRSQ MRCP ALLO REST RNFR RNTO
+ ABOR DELE CWD LIST NLST SITE
+ STAT HELP NOOP MKD RMD PWD
+ CDUP STOU SMNT SYST SIZE MDTM
+
+ UMASK IDLE CHMOD
+
+ LEXERR
+
+%start cmd_list
+
+%%
+
+cmd_list: /* empty */
+ | cmd_list cmd
+ = {
+ fromname = (char *) 0;
+ }
+ | cmd_list rcmd
+ ;
+
+cmd: USER SP username CRLF
+ = {
+ user((char *) $3);
+ free((char *) $3);
+ }
+ | PASS SP password CRLF
+ = {
+ pass((char *) $3);
+ free((char *) $3);
+ }
+ | PORT SP host_port CRLF
+ = {
+ usedefault = 0;
+ if (pdata >= 0) {
+ (void) close(pdata);
+ pdata = -1;
+ }
+ reply(200, "PORT command successful.");
+ }
+ | PASV CRLF
+ = {
+ passive();
+ }
+ | TYPE SP type_code CRLF
+ = {
+ switch (cmd_type) {
+
+ case TYPE_A:
+ if (cmd_form == FORM_N) {
+ reply(200, "Type set to A.");
+ type = cmd_type;
+ form = cmd_form;
+ } else
+ reply(504, "Form must be N.");
+ break;
+
+ case TYPE_E:
+ reply(504, "Type E not implemented.");
+ break;
+
+ case TYPE_I:
+ reply(200, "Type set to I.");
+ type = cmd_type;
+ break;
+
+ case TYPE_L:
+#if NBBY == 8
+ if (cmd_bytesz == 8) {
+ reply(200,
+ "Type set to L (byte size 8).");
+ type = cmd_type;
+ } else
+ reply(504, "Byte size must be 8.");
+#else /* NBBY == 8 */
+ UNIMPLEMENTED for NBBY != 8
+#endif /* NBBY == 8 */
+ }
+ }
+ | STRU SP struct_code CRLF
+ = {
+ switch ($3) {
+
+ case STRU_F:
+ reply(200, "STRU F ok.");
+ break;
+
+ default:
+ reply(504, "Unimplemented STRU type.");
+ }
+ }
+ | MODE SP mode_code CRLF
+ = {
+ switch ($3) {
+
+ case MODE_S:
+ reply(200, "MODE S ok.");
+ break;
+
+ default:
+ reply(502, "Unimplemented MODE type.");
+ }
+ }
+ | ALLO SP NUMBER CRLF
+ = {
+ reply(202, "ALLO command ignored.");
+ }
+ | ALLO SP NUMBER SP R SP NUMBER CRLF
+ = {
+ reply(202, "ALLO command ignored.");
+ }
+ | RETR check_login SP pathname CRLF
+ = {
+ if ($2 && $4 != NULL)
+ retrieve((char *) 0, (char *) $4);
+ if ($4 != NULL)
+ free((char *) $4);
+ }
+ | STOR check_login SP pathname CRLF
+ = {
+ if ($2 && $4 != NULL)
+ store((char *) $4, "w", 0);
+ if ($4 != NULL)
+ free((char *) $4);
+ }
+ | APPE check_login SP pathname CRLF
+ = {
+ if ($2 && $4 != NULL)
+ store((char *) $4, "a", 0);
+ if ($4 != NULL)
+ free((char *) $4);
+ }
+ | NLST check_login CRLF
+ = {
+ if ($2)
+ send_file_list(".");
+ }
+ | NLST check_login SP STRING CRLF
+ = {
+ if ($2 && $4 != NULL)
+ send_file_list((char *) $4);
+ if ($4 != NULL)
+ free((char *) $4);
+ }
+ | LIST check_login CRLF
+ = {
+ if ($2)
+ retrieve("/bin/ls -lgA", "");
+ }
+ | LIST check_login SP pathname CRLF
+ = {
+ if ($2 && $4 != NULL)
+ retrieve("/bin/ls -lgA %s", (char *) $4);
+ if ($4 != NULL)
+ free((char *) $4);
+ }
+ | STAT check_login SP pathname CRLF
+ = {
+ if ($2 && $4 != NULL)
+ statfilecmd((char *) $4);
+ if ($4 != NULL)
+ free((char *) $4);
+ }
+ | STAT CRLF
+ = {
+ statcmd();
+ }
+ | DELE check_login SP pathname CRLF
+ = {
+ if ($2 && $4 != NULL)
+ delete((char *) $4);
+ if ($4 != NULL)
+ free((char *) $4);
+ }
+ | RNTO SP pathname CRLF
+ = {
+ if (fromname) {
+ renamecmd(fromname, (char *) $3);
+ free(fromname);
+ fromname = (char *) 0;
+ } else {
+ reply(503, "Bad sequence of commands.");
+ }
+ free((char *) $3);
+ }
+ | ABOR CRLF
+ = {
+ reply(225, "ABOR command successful.");
+ }
+ | CWD check_login CRLF
+ = {
+ if ($2)
+ cwd(pw->pw_dir);
+ }
+ | CWD check_login SP pathname CRLF
+ = {
+ if ($2 && $4 != NULL)
+ cwd((char *) $4);
+ if ($4 != NULL)
+ free((char *) $4);
+ }
+ | HELP CRLF
+ = {
+ help(cmdtab, (char *) 0);
+ }
+ | HELP SP STRING CRLF
+ = {
+ register char *cp = (char *)$3;
+
+ if (strncasecmp(cp, "SITE", 4) == 0) {
+ cp = (char *)$3 + 4;
+ if (*cp == ' ')
+ cp++;
+ if (*cp)
+ help(sitetab, cp);
+ else
+ help(sitetab, (char *) 0);
+ } else
+ help(cmdtab, (char *) $3);
+ }
+ | NOOP CRLF
+ = {
+ reply(200, "NOOP command successful.");
+ }
+ | MKD check_login SP pathname CRLF
+ = {
+ if ($2 && $4 != NULL)
+ makedir((char *) $4);
+ if ($4 != NULL)
+ free((char *) $4);
+ }
+ | RMD check_login SP pathname CRLF
+ = {
+ if ($2 && $4 != NULL)
+ removedir((char *) $4);
+ if ($4 != NULL)
+ free((char *) $4);
+ }
+ | PWD check_login CRLF
+ = {
+ if ($2)
+ pwd();
+ }
+ | CDUP check_login CRLF
+ = {
+ if ($2)
+ cwd("..");
+ }
+ | SITE SP HELP CRLF
+ = {
+ help(sitetab, (char *) 0);
+ }
+ | SITE SP HELP SP STRING CRLF
+ = {
+ help(sitetab, (char *) $5);
+ }
+ | SITE SP UMASK check_login CRLF
+ = {
+ int oldmask;
+
+ if ($4) {
+ oldmask = umask(0);
+ (void) umask(oldmask);
+ reply(200, "Current UMASK is %03o", oldmask);
+ }
+ }
+ | SITE SP UMASK check_login SP octal_number CRLF
+ = {
+ int oldmask;
+
+ if ($4) {
+ if (($6 == -1) || ($6 > 0777)) {
+ reply(501, "Bad UMASK value");
+ } else {
+ oldmask = umask($6);
+ reply(200,
+ "UMASK set to %03o (was %03o)",
+ $6, oldmask);
+ }
+ }
+ }
+ | SITE SP CHMOD check_login SP octal_number SP pathname CRLF
+ = {
+ if ($4 && ($8 != NULL)) {
+ if ($6 > 0777)
+ reply(501,
+ "CHMOD: Mode value must be between 0 and 0777");
+ else if (chmod((char *) $8, $6) < 0)
+ perror_reply(550, (char *) $8);
+ else
+ reply(200, "CHMOD command successful.");
+ }
+ if ($8 != NULL)
+ free((char *) $8);
+ }
+ | SITE SP IDLE CRLF
+ = {
+ reply(200,
+ "Current IDLE time limit is %d seconds; max %d",
+ timeout, maxtimeout);
+ }
+ | SITE SP IDLE SP NUMBER CRLF
+ = {
+ if ($5 < 30 || $5 > maxtimeout) {
+ reply(501,
+ "Maximum IDLE time must be between 30 and %d seconds",
+ maxtimeout);
+ } else {
+ timeout = $5;
+ (void) alarm((unsigned) timeout);
+ reply(200,
+ "Maximum IDLE time set to %d seconds",
+ timeout);
+ }
+ }
+ | STOU check_login SP pathname CRLF
+ = {
+ if ($2 && $4 != NULL)
+ store((char *) $4, "w", 1);
+ if ($4 != NULL)
+ free((char *) $4);
+ }
+ | SYST CRLF
+ = {
+#ifdef unix
+#ifdef BSD
+ reply(215, "UNIX Type: L%d Version: BSD-%d",
+ NBBY, BSD);
+#else /* BSD */
+ reply(215, "UNIX Type: L%d", NBBY);
+#endif /* BSD */
+#else /* unix */
+ reply(215, "UNKNOWN Type: L%d", NBBY);
+#endif /* unix */
+ }
+
+ /*
+ * SIZE is not in RFC959, but Postel has blessed it and
+ * it will be in the updated RFC.
+ *
+ * Return size of file in a format suitable for
+ * using with RESTART (we just count bytes).
+ */
+ | SIZE check_login SP pathname CRLF
+ = {
+ if ($2 && $4 != NULL)
+ sizecmd((char *) $4);
+ if ($4 != NULL)
+ free((char *) $4);
+ }
+
+ /*
+ * MDTM is not in RFC959, but Postel has blessed it and
+ * it will be in the updated RFC.
+ *
+ * Return modification time of file as an ISO 3307
+ * style time. E.g. YYYYMMDDHHMMSS or YYYYMMDDHHMMSS.xxx
+ * where xxx is the fractional second (of any precision,
+ * not necessarily 3 digits)
+ */
+ | MDTM check_login SP pathname CRLF
+ = {
+ if ($2 && $4 != NULL) {
+ struct stat stbuf;
+ if (stat((char *) $4, &stbuf) < 0)
+ perror_reply(550, "%s", (char *) $4);
+ else if ((stbuf.st_mode&S_IFMT) != S_IFREG) {
+ reply(550, "%s: not a plain file.",
+ (char *) $4);
+ } else {
+ register struct tm *t;
+ struct tm *gmtime();
+ t = gmtime(&stbuf.st_mtime);
+ reply(213,
+ "19%02d%02d%02d%02d%02d%02d",
+ t->tm_year, t->tm_mon+1, t->tm_mday,
+ t->tm_hour, t->tm_min, t->tm_sec);
+ }
+ }
+ if ($4 != NULL)
+ free((char *) $4);
+ }
+ | QUIT CRLF
+ = {
+ reply(221, "Goodbye.");
+ dologout(0);
+ }
+ | error CRLF
+ = {
+ yyerrok;
+ }
+ ;
+rcmd: RNFR check_login SP pathname CRLF
+ = {
+ char *renamefrom();
+
+ if ($2 && $4) {
+ fromname = renamefrom((char *) $4);
+ if (fromname == (char *) 0 && $4) {
+ free((char *) $4);
+ }
+ }
+ }
+ ;
+
+username: STRING
+ ;
+
+password: /* empty */
+ = {
+ *(char **)&($$) = "";
+ }
+ | STRING
+ ;
+
+byte_size: NUMBER
+ ;
+
+host_port: NUMBER COMMA NUMBER COMMA NUMBER COMMA NUMBER COMMA
+ NUMBER COMMA NUMBER
+ = {
+ register char *a, *p;
+
+ a = (char *)&data_dest.sin_addr;
+ a[0] = $1; a[1] = $3; a[2] = $5; a[3] = $7;
+ p = (char *)&data_dest.sin_port;
+ p[0] = $9; p[1] = $11;
+ data_dest.sin_family = AF_INET;
+ }
+ ;
+
+form_code: N
+ = {
+ $$ = FORM_N;
+ }
+ | T
+ = {
+ $$ = FORM_T;
+ }
+ | C
+ = {
+ $$ = FORM_C;
+ }
+ ;
+
+type_code: A
+ = {
+ cmd_type = TYPE_A;
+ cmd_form = FORM_N;
+ }
+ | A SP form_code
+ = {
+ cmd_type = TYPE_A;
+ cmd_form = $3;
+ }
+ | E
+ = {
+ cmd_type = TYPE_E;
+ cmd_form = FORM_N;
+ }
+ | E SP form_code
+ = {
+ cmd_type = TYPE_E;
+ cmd_form = $3;
+ }
+ | I
+ = {
+ cmd_type = TYPE_I;
+ }
+ | L
+ = {
+ cmd_type = TYPE_L;
+ cmd_bytesz = NBBY;
+ }
+ | L SP byte_size
+ = {
+ cmd_type = TYPE_L;
+ cmd_bytesz = $3;
+ }
+ /* this is for a bug in the BBN ftp */
+ | L byte_size
+ = {
+ cmd_type = TYPE_L;
+ cmd_bytesz = $2;
+ }
+ ;
+
+struct_code: F
+ = {
+ $$ = STRU_F;
+ }
+ | R
+ = {
+ $$ = STRU_R;
+ }
+ | P
+ = {
+ $$ = STRU_P;
+ }
+ ;
+
+mode_code: S
+ = {
+ $$ = MODE_S;
+ }
+ | B
+ = {
+ $$ = MODE_B;
+ }
+ | C
+ = {
+ $$ = MODE_C;
+ }
+ ;
+
+pathname: pathstring
+ = {
+ /*
+ * Problem: this production is used for all pathname
+ * processing, but only gives a 550 error reply.
+ * This is a valid reply in some cases but not in others.
+ */
+ if (logged_in && $1 && strncmp((char *) $1, "~", 1) == 0) {
+ *(char **)&($$) = *glob((char *) $1);
+ if (globerr != NULL) {
+ reply(550, globerr);
+ $$ = NULL;
+ }
+ free((char *) $1);
+ } else
+ $$ = $1;
+ }
+ ;
+
+pathstring: STRING
+ ;
+
+octal_number: NUMBER
+ = {
+ register int ret, dec, multby, digit;
+
+ /*
+ * Convert a number that was read as decimal number
+ * to what it would be if it had been read as octal.
+ */
+ dec = $1;
+ multby = 1;
+ ret = 0;
+ while (dec) {
+ digit = dec%10;
+ if (digit > 7) {
+ ret = -1;
+ break;
+ }
+ ret += digit * multby;
+ multby *= 8;
+ dec /= 10;
+ }
+ $$ = ret;
+ }
+ ;
+
+check_login: /* empty */
+ = {
+ if (logged_in)
+ $$ = 1;
+ else {
+ reply(530, "Please login with USER and PASS.");
+ $$ = 0;
+ }
+ }
+ ;
+
+%%
+
+extern jmp_buf errcatch;
+
+#define CMD 0 /* beginning of command */
+#define ARGS 1 /* expect miscellaneous arguments */
+#define STR1 2 /* expect SP followed by STRING */
+#define STR2 3 /* expect STRING */
+#define OSTR 4 /* optional SP then STRING */
+#define ZSTR1 5 /* SP then optional STRING */
+#define ZSTR2 6 /* optional STRING after SP */
+#define SITECMD 7 /* SITE command */
+#define NSTR 8 /* Number followed by a string */
+
+struct tab {
+ char *name;
+ short token;
+ short state;
+ short implemented; /* 1 if command is implemented */
+ char *help;
+};
+
+struct tab cmdtab[] = { /* In order defined in RFC 765 */
+ { "USER", USER, STR1, 1, "<sp> username" },
+ { "PASS", PASS, ZSTR1, 1, "<sp> password" },
+ { "ACCT", ACCT, STR1, 0, "(specify account)" },
+ { "SMNT", SMNT, ARGS, 0, "(structure mount)" },
+ { "REIN", REIN, ARGS, 0, "(reinitialize server state)" },
+ { "QUIT", QUIT, ARGS, 1, "(terminate service)", },
+ { "PORT", PORT, ARGS, 1, "<sp> b0, b1, b2, b3, b4" },
+ { "PASV", PASV, ARGS, 1, "(set server in passive mode)" },
+ { "TYPE", TYPE, ARGS, 1, "<sp> [ A | E | I | L ]" },
+ { "STRU", STRU, ARGS, 1, "(specify file structure)" },
+ { "MODE", MODE, ARGS, 1, "(specify transfer mode)" },
+ { "RETR", RETR, STR1, 1, "<sp> file-name" },
+ { "STOR", STOR, STR1, 1, "<sp> file-name" },
+ { "APPE", APPE, STR1, 1, "<sp> file-name" },
+ { "MLFL", MLFL, OSTR, 0, "(mail file)" },
+ { "MAIL", MAIL, OSTR, 0, "(mail to user)" },
+ { "MSND", MSND, OSTR, 0, "(mail send to terminal)" },
+ { "MSOM", MSOM, OSTR, 0, "(mail send to terminal or mailbox)" },
+ { "MSAM", MSAM, OSTR, 0, "(mail send to terminal and mailbox)" },
+ { "MRSQ", MRSQ, OSTR, 0, "(mail recipient scheme question)" },
+ { "MRCP", MRCP, STR1, 0, "(mail recipient)" },
+ { "ALLO", ALLO, ARGS, 1, "allocate storage (vacuously)" },
+ { "REST", REST, ARGS, 0, "(restart command)" },
+ { "RNFR", RNFR, STR1, 1, "<sp> file-name" },
+ { "RNTO", RNTO, STR1, 1, "<sp> file-name" },
+ { "ABOR", ABOR, ARGS, 1, "(abort operation)" },
+ { "DELE", DELE, STR1, 1, "<sp> file-name" },
+ { "CWD", CWD, OSTR, 1, "[ <sp> directory-name ]" },
+ { "XCWD", CWD, OSTR, 1, "[ <sp> directory-name ]" },
+ { "LIST", LIST, OSTR, 1, "[ <sp> path-name ]" },
+ { "NLST", NLST, OSTR, 1, "[ <sp> path-name ]" },
+ { "SITE", SITE, SITECMD, 1, "site-cmd [ <sp> arguments ]" },
+ { "SYST", SYST, ARGS, 1, "(get type of operating system)" },
+ { "STAT", STAT, OSTR, 1, "[ <sp> path-name ]" },
+ { "HELP", HELP, OSTR, 1, "[ <sp> <string> ]" },
+ { "NOOP", NOOP, ARGS, 1, "" },
+ { "MKD", MKD, STR1, 1, "<sp> path-name" },
+ { "XMKD", MKD, STR1, 1, "<sp> path-name" },
+ { "RMD", RMD, STR1, 1, "<sp> path-name" },
+ { "XRMD", RMD, STR1, 1, "<sp> path-name" },
+ { "PWD", PWD, ARGS, 1, "(return current directory)" },
+ { "XPWD", PWD, ARGS, 1, "(return current directory)" },
+ { "CDUP", CDUP, ARGS, 1, "(change to parent directory)" },
+ { "XCUP", CDUP, ARGS, 1, "(change to parent directory)" },
+ { "STOU", STOU, STR1, 1, "<sp> file-name" },
+ { "SIZE", SIZE, OSTR, 1, "<sp> path-name" },
+ { "MDTM", MDTM, OSTR, 1, "<sp> path-name" },
+ { NULL, 0, 0, 0, 0 }
+};
+
+struct tab sitetab[] = {
+ { "UMASK", UMASK, ARGS, 1, "[ <sp> umask ]" },
+ { "IDLE", IDLE, ARGS, 1, "[ <sp> maximum-idle-time ]" },
+ { "CHMOD", CHMOD, NSTR, 1, "<sp> mode <sp> file-name" },
+ { "HELP", HELP, OSTR, 1, "[ <sp> <string> ]" },
+ { NULL, 0, 0, 0, 0 }
+};
+
+struct tab *
+lookup(p, cmd)
+ register struct tab *p;
+ char *cmd;
+{
+
+ for (; p->name != NULL; p++)
+ if (strcmp(cmd, p->name) == 0)
+ return (p);
+ return (0);
+}
+
+#include <arpa/telnet.h>
+
+/*
+ * getline - a hacked up version of fgets to ignore TELNET escape codes.
+ */
+char *
+getline(s, n, iop)
+ char *s;
+ register FILE *iop;
+{
+ register c;
+ register char *cs;
+
+ cs = s;
+/* tmpline may contain saved command from urgent mode interruption */
+ for (c = 0; tmpline[c] != '\0' && --n > 0; ++c) {
+ *cs++ = tmpline[c];
+ if (tmpline[c] == '\n') {
+ *cs++ = '\0';
+ if (debug)
+ syslog(LOG_DEBUG, "command: %s", s);
+ tmpline[0] = '\0';
+ return(s);
+ }
+ if (c == 0)
+ tmpline[0] = '\0';
+ }
+ while ((c = getc(iop)) != EOF) {
+ c &= 0377;
+ if (c == IAC) {
+ if ((c = getc(iop)) != EOF) {
+ c &= 0377;
+ switch (c) {
+ case WILL:
+ case WONT:
+ c = getc(iop);
+ printf("%c%c%c", IAC, DONT, 0377&c);
+ (void) fflush(stdout);
+ continue;
+ case DO:
+ case DONT:
+ c = getc(iop);
+ printf("%c%c%c", IAC, WONT, 0377&c);
+ (void) fflush(stdout);
+ continue;
+ case IAC:
+ break;
+ default:
+ continue; /* ignore command */
+ }
+ }
+ }
+ *cs++ = c;
+ if (--n <= 0 || c == '\n')
+ break;
+ }
+ if (c == EOF && cs == s)
+ return (NULL);
+ *cs++ = '\0';
+ if (debug)
+ syslog(LOG_DEBUG, "command: %s", s);
+ return (s);
+}
+
+static int
+toolong()
+{
+ time_t now;
+ extern char *ctime();
+ extern time_t time();
+
+ reply(421,
+ "Timeout (%d seconds): closing control connection.", timeout);
+ (void) time(&now);
+ if (logging) {
+ syslog(LOG_INFO,
+ "User %s timed out after %d seconds at %s",
+ (pw ? pw -> pw_name : "unknown"), timeout, ctime(&now));
+ }
+ dologout(1);
+}
+
+yylex()
+{
+ static int cpos, state;
+ register char *cp, *cp2;
+ register struct tab *p;
+ int n;
+ char c, *strpbrk();
+ char *copy();
+
+ for (;;) {
+ switch (state) {
+
+ case CMD:
+ (void) signal(SIGALRM, toolong);
+ (void) alarm((unsigned) timeout);
+ if (getline(cbuf, sizeof(cbuf)-1, stdin) == NULL) {
+ reply(221, "You could at least say goodbye.");
+ dologout(0);
+ }
+ (void) alarm(0);
+#ifdef SETPROCTITLE
+ if (strncasecmp(cbuf, "PASS", 4) != NULL)
+ setproctitle("%s: %s", proctitle, cbuf);
+#endif /* SETPROCTITLE */
+ if ((cp = index(cbuf, '\r'))) {
+ *cp++ = '\n';
+ *cp = '\0';
+ }
+ if ((cp = strpbrk(cbuf, " \n")))
+ cpos = cp - cbuf;
+ if (cpos == 0)
+ cpos = 4;
+ c = cbuf[cpos];
+ cbuf[cpos] = '\0';
+ upper(cbuf);
+ p = lookup(cmdtab, cbuf);
+ cbuf[cpos] = c;
+ if (p != 0) {
+ if (p->implemented == 0) {
+ nack(p->name);
+ longjmp(errcatch,0);
+ /* NOTREACHED */
+ }
+ state = p->state;
+ *(char **)&yylval = p->name;
+ return (p->token);
+ }
+ break;
+
+ case SITECMD:
+ if (cbuf[cpos] == ' ') {
+ cpos++;
+ return (SP);
+ }
+ cp = &cbuf[cpos];
+ if ((cp2 = strpbrk(cp, " \n")))
+ cpos = cp2 - cbuf;
+ c = cbuf[cpos];
+ cbuf[cpos] = '\0';
+ upper(cp);
+ p = lookup(sitetab, cp);
+ cbuf[cpos] = c;
+ if (p != 0) {
+ if (p->implemented == 0) {
+ state = CMD;
+ nack(p->name);
+ longjmp(errcatch,0);
+ /* NOTREACHED */
+ }
+ state = p->state;
+ *(char **)&yylval = p->name;
+ return (p->token);
+ }
+ state = CMD;
+ break;
+
+ case OSTR:
+ if (cbuf[cpos] == '\n') {
+ state = CMD;
+ return (CRLF);
+ }
+ /* FALLTHROUGH */
+
+ case STR1:
+ case ZSTR1:
+ dostr1:
+ if (cbuf[cpos] == ' ') {
+ cpos++;
+ state = state == OSTR ? STR2 : ++state;
+ return (SP);
+ }
+ break;
+
+ case ZSTR2:
+ if (cbuf[cpos] == '\n') {
+ state = CMD;
+ return (CRLF);
+ }
+ /* FALLTHROUGH */
+
+ case STR2:
+ cp = &cbuf[cpos];
+ n = strlen(cp);
+ cpos += n - 1;
+ /*
+ * Make sure the string is nonempty and \n terminated.
+ */
+ if (n > 1 && cbuf[cpos] == '\n') {
+ cbuf[cpos] = '\0';
+ *(char **)&yylval = copy(cp);
+ cbuf[cpos] = '\n';
+ state = ARGS;
+ return (STRING);
+ }
+ break;
+
+ case NSTR:
+ if (cbuf[cpos] == ' ') {
+ cpos++;
+ return (SP);
+ }
+ if (isdigit(cbuf[cpos])) {
+ cp = &cbuf[cpos];
+ while (isdigit(cbuf[++cpos]))
+ ;
+ c = cbuf[cpos];
+ cbuf[cpos] = '\0';
+ yylval = atoi(cp);
+ cbuf[cpos] = c;
+ state = STR1;
+ return (NUMBER);
+ }
+ state = STR1;
+ goto dostr1;
+
+ case ARGS:
+ if (isdigit(cbuf[cpos])) {
+ cp = &cbuf[cpos];
+ while (isdigit(cbuf[++cpos]))
+ ;
+ c = cbuf[cpos];
+ cbuf[cpos] = '\0';
+ yylval = atoi(cp);
+ cbuf[cpos] = c;
+ return (NUMBER);
+ }
+ switch (cbuf[cpos++]) {
+
+ case '\n':
+ state = CMD;
+ return (CRLF);
+
+ case ' ':
+ return (SP);
+
+ case ',':
+ return (COMMA);
+
+ case 'A':
+ case 'a':
+ return (A);
+
+ case 'B':
+ case 'b':
+ return (B);
+
+ case 'C':
+ case 'c':
+ return (C);
+
+ case 'E':
+ case 'e':
+ return (E);
+
+ case 'F':
+ case 'f':
+ return (F);
+
+ case 'I':
+ case 'i':
+ return (I);
+
+ case 'L':
+ case 'l':
+ return (L);
+
+ case 'N':
+ case 'n':
+ return (N);
+
+ case 'P':
+ case 'p':
+ return (P);
+
+ case 'R':
+ case 'r':
+ return (R);
+
+ case 'S':
+ case 's':
+ return (S);
+
+ case 'T':
+ case 't':
+ return (T);
+
+ }
+ break;
+
+ default:
+ fatal("Unknown state in scanner.");
+ }
+ yyerror((char *) 0);
+ state = CMD;
+ longjmp(errcatch,0);
+ }
+}
+
+upper(s)
+ register char *s;
+{
+ while (*s != '\0') {
+ if (islower(*s))
+ *s = toupper(*s);
+ s++;
+ }
+}
+
+char *
+copy(s)
+ char *s;
+{
+ char *p;
+ extern char *malloc(), *strcpy();
+
+ p = malloc((unsigned) strlen(s) + 1);
+ if (p == NULL)
+ fatal("Ran out of memory.");
+ (void) strcpy(p, s);
+ return (p);
+}
+
+help(ctab, s)
+ struct tab *ctab;
+ char *s;
+{
+ register struct tab *c;
+ register int width, NCMDS;
+ char *type;
+
+ if (ctab == sitetab)
+ type = "SITE ";
+ else
+ type = "";
+ width = 0, NCMDS = 0;
+ for (c = ctab; c->name != NULL; c++) {
+ int len = strlen(c->name);
+
+ if (len > width)
+ width = len;
+ NCMDS++;
+ }
+ width = (width + 8) &~ 7;
+ if (s == 0) {
+ register int i, j, w;
+ int columns, lines;
+
+ lreply(214, "The following %scommands are recognized %s.",
+ type, "(* =>'s unimplemented)");
+ columns = 76 / width;
+ if (columns == 0)
+ columns = 1;
+ lines = (NCMDS + columns - 1) / columns;
+ for (i = 0; i < lines; i++) {
+ printf(" ");
+ for (j = 0; j < columns; j++) {
+ c = ctab + j * lines + i;
+ printf("%s%c", c->name,
+ c->implemented ? ' ' : '*');
+ if (c + lines >= &ctab[NCMDS])
+ break;
+ w = strlen(c->name) + 1;
+ while (w < width) {
+ putchar(' ');
+ w++;
+ }
+ }
+ printf("\r\n");
+ }
+ (void) fflush(stdout);
+ reply(214, "Direct comments to ftp-bugs@%s.", hostname);
+ return;
+ }
+ upper(s);
+ c = lookup(ctab, s);
+ if (c == (struct tab *)0) {
+ reply(502, "Unknown command %s.", s);
+ return;
+ }
+ if (c->implemented)
+ reply(214, "Syntax: %s%s %s", type, c->name, c->help);
+ else
+ reply(214, "%s%-*s\t%s; unimplemented.", type, width,
+ c->name, c->help);
+}
+
+sizecmd(filename)
+char *filename;
+{
+ switch (type) {
+ case TYPE_L:
+ case TYPE_I: {
+ struct stat stbuf;
+ if (stat(filename, &stbuf) < 0 ||
+ (stbuf.st_mode&S_IFMT) != S_IFREG)
+ reply(550, "%s: not a plain file.", filename);
+ else
+ reply(213, "%lu", stbuf.st_size);
+ break;}
+ case TYPE_A: {
+ FILE *fin;
+ register int c, count;
+ struct stat stbuf;
+ fin = fopen(filename, "r");
+ if (fin == NULL) {
+ perror_reply(550, filename);
+ return;
+ }
+ if (fstat(fileno(fin), &stbuf) < 0 ||
+ (stbuf.st_mode&S_IFMT) != S_IFREG) {
+ reply(550, "%s: not a plain file.", filename);
+ (void) fclose(fin);
+ return;
+ }
+
+ count = 0;
+ while((c=getc(fin)) != EOF) {
+ if (c == '\n') /* will get expanded to \r\n */
+ count++;
+ count++;
+ }
+ (void) fclose(fin);
+
+ reply(213, "%ld", count);
+ break;}
+ default:
+ reply(504, "SIZE not implemented for Type %c.", "?AEIL"[type]);
+ }
+}
projects / unix-history / commitdiff