/* * Copyright (c) 1985, 1988, 1993, 1994 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)ftpcmd.y 8.3 (Berkeley) 4/6/94 */ /* * Grammar for FTP commands. * See RFC 959. */ %{ #ifndef lint /*static char sccsid[] = "@(#)ftpcmd.y 8.3 (Berkeley) 4/6/94";*/ #endif /* not lint */ #ifdef HAVE_CONFIG_H #include #endif #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef TIME_WITH_SYS_TIME # include # include #else # ifdef HAVE_SYS_TIME_H # include # else # include # endif #endif #include #include #ifdef HAVE_SYS_UTSNAME_H #include #endif /* Include glob.h last, because it may define "const" which breaks system headers on some platforms. */ #include #include "extern.h" #include #include #if ! defined (NBBY) && defined (CHAR_BIT) #define NBBY CHAR_BIT #endif off_t restart_point; static char cbuf[512]; /* Command Buffer. */ static char *fromname; static int cmd_type; static int cmd_form; static int cmd_bytesz; struct tab { const char *name; short token; short state; short implemented; /* 1 if command is implemented */ const char *help; }; extern struct tab cmdtab[]; extern struct tab sitetab[]; static char *copy __P ((char *)); static void help __P ((struct tab *, char *)); static struct tab *lookup __P ((struct tab *, char *)); static int yylex __P ((void)); static void yyerror __P ((const char *s)); %} %union { long long i; char *s; } %token A B C E F I L N P R S T SP CRLF COMMA USER PASS ACCT REIN QUIT PORT PASV EPSV 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 TURBO REBOOT LEXERR %token STRING %token NUMBER %type check_login open_topfield octal_number byte_size %type struct_code mode_code type_code form_code %type pathstring pathname password username %start cmd_list %% cmd_list : /* empty */ | cmd_list cmd { if (fromname != NULL) free (fromname); fromname = (char *) 0; restart_point = (off_t) 0; } | cmd_list rcmd ; cmd : USER SP username CRLF { user($3); free($3); } | PASS SP password CRLF { pass($3); memset ($3, 0, strlen ($3)); free($3); } | PORT check_login SP host_port CRLF { usedefault = 0; if (pdata >= 0) { (void) close(pdata); pdata = -1; } if ($2) { if (memcmp (&his_addr.sin_addr, &data_dest.sin_addr, sizeof (data_dest.sin_addr)) == 0 && ntohs (data_dest.sin_port) > IPPORT_RESERVED) { reply (200, "PORT command sucessful."); } else { memset (&data_dest, 0, sizeof (data_dest)); reply(500, "Illegal PORT Command"); } } } | PASV check_login CRLF { if ($2) passive(0); } | EPSV check_login SP STRING CRLF { if ($2 && $4 && strcmp($4, "ALL") == 0) { reply(200, "EPSV ALL command successful"); } } | EPSV check_login CRLF { if ($2) passive(1); } | 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 defined (NBBY) && 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 open_topfield SP pathname CRLF { if ($2 && $3 && $5 != NULL) retrieve((char *) 0, $5); if ($5 != NULL) free($5); } | STOR check_login open_topfield SP pathname CRLF { if ($2 && $3 && $5 != NULL) store($5, "w", 0); if ($5 != NULL) free($5); } | APPE check_login open_topfield SP pathname CRLF { if ($2 && $3 && $5 != NULL) store($5, "a", 0); if ($5 != NULL) free($5); } | NLST check_login open_topfield CRLF { if ($2 && $3) send_file_list(0, 0); } | NLST check_login open_topfield SP STRING CRLF { if ($2 && $3 && $5 != NULL) send_file_list($5, 0); if ($5 != NULL) free($5); } | LIST check_login open_topfield CRLF { if ($2 && $3) send_file_list(0, 1); } | LIST check_login open_topfield SP pathname CRLF { if ($2 && $3 && $5 != NULL) send_file_list($5, 1); if ($5 != NULL) free($5); } | STAT check_login open_topfield SP pathname CRLF { if ($2 && $3 && $5 != NULL) statfilecmd($5); if ($5 != NULL) free($5); } | STAT CRLF { statcmd(); } | DELE check_login open_topfield SP pathname CRLF { if ($2 && $3 && $5 != NULL) delete($5); if ($5 != NULL) free($5); } | RNTO check_login open_topfield SP pathname CRLF { if ($2 && $3) { if (fromname) { renamecmd(fromname, $5); free(fromname); fromname = (char *) 0; } else { reply(503, "Bad sequence of commands."); } } free ($5); } | ABOR CRLF { reply(225, "ABOR command successful."); abort_transfer(0); } | CWD check_login open_topfield CRLF { if ($2 && $3) cwd(cred.homedir); } | CWD check_login open_topfield SP pathname CRLF { if ($2 && $3 && $5 != NULL) cwd($5); if ($5 != NULL) free($5); } | HELP CRLF { help(cmdtab, (char *) 0); } | HELP SP STRING CRLF { char *cp = $3; if (strncasecmp(cp, "SITE", 4) == 0) { cp = $3 + 4; if (*cp == ' ') cp++; if (*cp) help(sitetab, cp); else help(sitetab, (char *) 0); } else help(cmdtab, $3); if ($3 != NULL) free ($3); } | NOOP CRLF { reply(200, "NOOP command successful."); } | MKD check_login open_topfield SP pathname CRLF { if ($2 && $3 && $5 != NULL) makedir($5); if ($5 != NULL) free($5); } | RMD check_login open_topfield SP pathname CRLF { if ($2 && $3 && $5 != NULL) removedir($5); if ($5 != NULL) free($5); } | PWD check_login CRLF { if ($2) pwd(); } | CDUP check_login open_topfield CRLF { if ($2 && $3) cwd(".."); } | SITE SP HELP CRLF { help(sitetab, (char *) 0); } | SITE SP HELP SP STRING CRLF { help(sitetab, $5); if ($5 != NULL) free ($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)", (int)$6, oldmask); } } } | SITE SP TURBO check_login CRLF { if ($4) { global_turbo_mode = !global_turbo_mode; reply(200, "TURBO is now %s", (global_turbo_mode) ? "on" : "off"); } } | SITE SP TURBO check_login SP NUMBER CRLF { if ($4) { global_turbo_mode = !!$6; reply(200, "TURBO is now %s", (global_turbo_mode) ? "on" : "off"); } } | SITE SP REBOOT check_login open_topfield CRLF { if ($4) { reboot_topfield(); } } | SITE SP IDLE CRLF { reply(200, "Current IDLE time limit is %d seconds; max %d", timeout, maxtimeout); } | SITE SP IDLE check_login SP NUMBER CRLF { if ($4) { if ($6 < 30 || $6 > maxtimeout) { reply (501, "Maximum IDLE time must be between 30 and %d seconds", maxtimeout); } else { timeout = $6; (void) alarm((unsigned) timeout); reply(200, "Maximum IDLE time set to %d seconds", timeout); } } } | STOU check_login open_topfield SP pathname CRLF { if ($2 && $3 && $5 != NULL) store($5, "w", 1); if ($5 != NULL) free($5); } | SYST CRLF { const char *sys_type; /* Official rfc-defined os type. */ char *version = 0; /* A more specific type. */ #ifdef HAVE_UNAME struct utsname u; if (uname (&u) == 0) { version = malloc (strlen (u.sysname) + 1 + strlen (u.release) + 1); if (version) sprintf (version, "%s %s", u.sysname, u.release); } #else #ifdef BSD version = "BSD"; #endif #endif #ifdef unix sys_type = "UNIX"; #else sys_type = "UNKNOWN"; #endif if (version) reply(215, "%s Type: L%d Version: %s", sys_type, NBBY, version); else reply(215, "%s Type: L%d", sys_type, NBBY); #ifdef HAVE_UNAME if (version) free (version); #endif } /* * 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 open_topfield SP pathname CRLF { if ($2 && $3 && $5 != NULL) { if (type == TYPE_L || type == TYPE_I) { off_t size = filesize($5); if (size < 0) { reply(550, "%s: not a plain file.", $5); } else { reply(213, "%llu", (long long)size); } } else { reply(504, "SIZE not implemented for Type %c.", "?AEIL"[type]); } if ($5 != NULL) { free($5); } } } /* * 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 open_topfield SP pathname CRLF { if ($2 && $3 && $5 != NULL) { time_t t = filetime($5); if (t < 0) { reply(550, "%s: not a plain file.", $5); } else { struct tm *tm; tm = gmtime(&t); reply(213, "%04d%02d%02d%02d%02d%02d", 1900 + tm->tm_year, tm->tm_mon+1, tm->tm_mday, tm->tm_hour, tm->tm_min, tm->tm_sec); } } if ($5 != NULL) free($5); } | QUIT CRLF { reply(221, "Goodbye."); dologout(0); } | error CRLF { yyerrok; } ; rcmd : RNFR check_login open_topfield SP pathname CRLF { restart_point = (off_t) 0; if ($2 && $3 && $5) { if (fromname != NULL) free (fromname); fromname = renamefrom($5); } if (fromname == (char *) 0 && $5) free($5); } | REST SP byte_size CRLF { if (fromname != NULL) free (fromname); fromname = (char *) 0; restart_point = $3; reply(350, "Restarting at %lld. %s", (long long)restart_point, "Send STORE or RETRIEVE to initiate transfer."); } ; username : STRING ; password : /* empty */ { $$ = (char *)calloc(1, sizeof(char)); } | STRING ; byte_size : NUMBER ; host_port : NUMBER COMMA NUMBER COMMA NUMBER COMMA NUMBER COMMA NUMBER COMMA NUMBER { char *a, *p; a = (char *)&data_dest.sin_addr; a[0] = $1; a[1] = $3; a[2] = $5; a[3] = $7; p = (char *)&data_dest.sin_port; p[0] = $9; p[1] = $11; data_dest.sin_family = AF_INET; } ; form_code : N { $$ = 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 (cred.logged_in && $1 && *$1 == '~') { glob_t gl; int flags = GLOB_NOCHECK; #ifdef GLOB_BRACE flags |= GLOB_BRACE; #endif #ifdef GLOB_QUOTE flags |= GLOB_QUOTE; #endif #ifdef GLOB_TILDE flags |= GLOB_TILDE; #endif memset(&gl, 0, sizeof(gl)); if (glob($1, flags, NULL, &gl) || gl.gl_pathc == 0) { reply(550, "not found"); $$ = NULL; } else { $$ = strdup(gl.gl_pathv[0]); } globfree(&gl); free($1); } else $$ = $1; } ; pathstring : STRING ; octal_number : NUMBER { int ret, dec, multby, digit; /* * Convert a number that was read as decimal number * to what it would be if it had been read as octal. */ dec = $1; multby = 1; ret = 0; while (dec) { digit = dec%10; if (digit > 7) { ret = -1; break; } ret += digit * multby; multby *= 8; dec /= 10; } $$ = ret; } ; check_login : /* empty */ { if (cred.logged_in) $$ = 1; else { reply(530, "Please login with USER and PASS."); $$ = 0; } } ; open_topfield : /* empty */ { $$ = open_topfield(0); } ; %% #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 cmdtab[] = { /* In order defined in RFC 765 */ { "USER", USER, STR1, 1, " username" }, { "PASS", PASS, ZSTR1, 1, " 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, " b0, b1, b2, b3, b4" }, { "PASV", PASV, ARGS, 1, "(set server in passive mode)" }, { "EPSV", EPSV, OSTR, 1, "(set server in extended passive mode)" }, { "TYPE", TYPE, ARGS, 1, " [ A | E | I | L ]" }, { "STRU", STRU, ARGS, 1, "(specify file structure)" }, { "MODE", MODE, ARGS, 1, "(specify transfer mode)" }, { "RETR", RETR, STR1, 1, " file-name" }, { "STOR", STOR, STR1, 1, " file-name" }, { "APPE", APPE, STR1, 1, " 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, 1, " offset (restart command)" }, { "RNFR", RNFR, STR1, 1, " file-name" }, { "RNTO", RNTO, STR1, 1, " file-name" }, { "ABOR", ABOR, ARGS, 1, "(abort operation)" }, { "DELE", DELE, STR1, 1, " file-name" }, { "CWD", CWD, OSTR, 1, "[ directory-name ]" }, { "XCWD", CWD, OSTR, 1, "[ directory-name ]" }, { "LIST", LIST, OSTR, 1, "[ path-name ]" }, { "NLST", NLST, OSTR, 1, "[ path-name ]" }, { "SITE", SITE, SITECMD, 1, "site-cmd [ arguments ]" }, { "SYST", SYST, ARGS, 1, "(get type of operating system)" }, { "STAT", STAT, OSTR, 1, "[ path-name ]" }, { "HELP", HELP, OSTR, 1, "[ ]" }, { "NOOP", NOOP, ARGS, 1, "" }, { "MKD", MKD, STR1, 1, " path-name" }, { "XMKD", MKD, STR1, 1, " path-name" }, { "RMD", RMD, STR1, 1, " path-name" }, { "XRMD", RMD, STR1, 1, " 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, " file-name" }, { "SIZE", SIZE, OSTR, 1, " path-name" }, { "MDTM", MDTM, OSTR, 1, " path-name" }, { NULL, 0, 0, 0, 0 } }; struct tab sitetab[] = { { "UMASK", UMASK, ARGS, 1, "[ umask ]" }, { "IDLE", IDLE, ARGS, 1, "[ maximum-idle-time ]" }, { "TURBO", TURBO, ARGS, 1, "[ 0|1 ]" }, { "REBOOT", REBOOT, ARGS, 1, "(reboot topfield)" }, { "HELP", HELP, OSTR, 1, "[ ]" }, { NULL, 0, 0, 0, 0 } }; static struct tab * lookup(p, cmd) struct tab *p; char *cmd; { for (; p->name != NULL; p++) if (strcmp(cmd, p->name) == 0) return (p); return (0); } #include /* * getline - a hacked up version of fgets to ignore TELNET escape codes. */ char * telnet_fgets(char *s, int n, FILE *iop) { int 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) { if (!cred.guest && strncasecmp("pass ", s, 5) == 0) { /* Don't syslog passwords */ syslog(LOG_DEBUG, "command: %.5s ???", s); } else { register char *cp; register int len; /* Don't syslog trailing CR-LF */ len = strlen(s); cp = s + len - 1; while (cp >= s && (*cp == '\n' || *cp == '\r')) { --cp; --len; } syslog(LOG_DEBUG, "command: %.*s", len, s); } } return (s); } void toolong(int signo) { (void)signo; reply(421, "Timeout (%d seconds): closing control connection.", timeout); if (logging) syslog(LOG_INFO, "User %s timed out after %d seconds", (cred.name ? cred.name : "unknown"), timeout); dologout(1); } static int yylex() { static int cpos, state; char *cp, *cp2; struct tab *p; int n; char c; for (;;) { switch (state) { case CMD: (void) signal(SIGALRM, toolong); (void) alarm((unsigned) timeout); /* Indicate that we are idle and can lose the connection to the topfield */ ftp_idle(); if (telnet_fgets(cbuf, sizeof(cbuf)-1, stdin) == NULL) { if (feof(stdin)) { reply(221, "You could at least say goodbye."); dologout(0); } /* Not EOF. Perhaps we just received a SIGHUP */ continue; } (void) alarm(0); #ifdef HAVE_SETPROCTITLE if (strncasecmp(cbuf, "PASS", 4) != NULL) setproctitle("%s: %s", proctitle, cbuf); #endif /* HAVE_SETPROCTITLE */ if ((cp = strchr(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; yylval.s = (char *)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; yylval.s = (char *)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 + 1; 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'; yylval.s = 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.i = strtoll(cp, 0, 10); 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.i = strtoll(cp, 0, 10); 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); } } void upper(char *s) { while (*s != '\0') { if (islower(*s)) *s = toupper(*s); s++; } } static char * copy(char *s) { char *p; p = malloc((unsigned) strlen(s) + 1); if (p == NULL) fatal("Ran out of memory."); (void) strcpy(p, s); return (p); } static void help(struct tab *ctab, char *s) { struct tab *c; int width, NCMDS; const char *help_type; if (ctab == sitetab) help_type = "SITE "; else help_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) { int i, j, w; int columns, lines; lreply(214, "The following %scommands are recognized %s.", help_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", help_type, c->name, c->help); else reply(214, "%s%-*s\t%s; unimplemented.", help_type, width, c->name, c->help); } /* ARGSUSED */ static void yyerror(const char *s) { char *cp; (void)s; cp = strchr(cbuf,'\n'); if (cp != NULL) *cp = '\0'; reply(500, "'%s': command not understood.", cbuf); }