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Annotation of fam/fam/ServerConnection.c++, Revision 1.1

1.1     ! trev        1: //  Copyright (C) 1999 Silicon Graphics, Inc.  All Rights Reserved.
        !             2: //
        !             3: //  This program is free software; you can redistribute it and/or modify it
        !             4: //  under the terms of version 2 of the GNU General Public License as
        !             5: //  published by the Free Software Foundation.
        !             6: //
        !             7: //  This program is distributed in the hope that it would be useful, but
        !             8: //  WITHOUT ANY WARRANTY; without even the implied warranty of
        !             9: //  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  Further, any
        !            10: //  license provided herein, whether implied or otherwise, is limited to
        !            11: //  this program in accordance with the express provisions of the GNU
        !            12: //  General Public License.  Patent licenses, if any, provided herein do not
        !            13: //  apply to combinations of this program with other product or programs, or
        !            14: //  any other product whatsoever.  This program is distributed without any
        !            15: //  warranty that the program is delivered free of the rightful claim of any
        !            16: //  third person by way of infringement or the like.  See the GNU General
        !            17: //  Public License for more details.
        !            18: //
        !            19: //  You should have received a copy of the GNU General Public License along
        !            20: //  with this program; if not, write the Free Software Foundation, Inc., 59
        !            21: //  Temple Place - Suite 330, Boston MA 02111-1307, USA.
        !            22:
        !            23: #include "ServerConnection.h"
        !            24:
        !            25: #include <assert.h>
        !            26: #include <ctype.h>
        !            27: #include <stdlib.h>
        !            28:
        !            29: #include "Cred.h"
        !            30: #include "Event.h"
        !            31: #include "Log.h"
        !            32:
        !            33: ServerConnection::ServerConnection(int fd,
        !            34: 				   EventHandler eh, DisconnectHandler dh,
        !            35: 				   void *clos)
        !            36:     : NetConnection(fd, NULL, NULL),
        !            37:       event_handler(eh), disconnect_handler(dh), closure(clos)
        !            38: {
        !            39:     assert(fd >= 0);
        !            40:     assert(eh);
        !            41:     assert(dh);
        !            42: }
        !            43:
        !            44: bool
        !            45: ServerConnection::input_msg(const char *msg, unsigned nbytes)
        !            46: {
        !            47:
        !            48:     // If there's an error parsing the message, then just forget about
        !            49:     // the message and return true.  If we returned false, then the
        !            50:     // connection would go down, but the remote fam would notice and
        !            51:     // reconnect almost immediately, and send another bad message,
        !            52:     // which would result in thrashing on both ends.
        !            53:
        !            54:     if (msg == NULL)
        !            55:     {   (*disconnect_handler)(closure);	// Disconnected.
        !            56: 	return true;
        !            57:     }
        !            58:
        !            59:     if (nbytes == 0 || msg[nbytes - 1])
        !            60:     {   Log::debug("protocol error");
        !            61: 	return true;
        !            62:     }
        !            63:
        !            64:     char *p = (char *) msg;
        !            65:     char opcode = *p++;
        !            66:     Request request = strtol(p, &p, 10);
        !            67:     // If the opcode is "c", then the next part of the msg contains a
        !            68:     // list of character flags indicating what changed about the
        !            69:     // file.  We currently ignore those flags.
        !            70:     //
        !            71:     if (opcode == 'c')
        !            72:     {
        !            73:         p++;
        !            74:         while (isascii(*p) && !isspace(*p))
        !            75:             p++;
        !            76:     }
        !            77:
        !            78:     const Event *event = Event::getEventFromOpcode(opcode);
        !            79:
        !            80:     // Skip over the space
        !            81:     p++;
        !            82:
        !            83:     char name[PATH_MAX + 1];
        !            84:     int i;
        !            85:     for (i = 0; *p; i++)
        !            86:     {   if (i >= PATH_MAX)
        !            87: 	{   Log::error("path name too long (%d chars)", i);
        !            88: 	    return true;
        !            89: 	}
        !            90: 	name[i] = *p++;
        !            91:     }
        !            92:     if ((i > 0) && (name[i - 1] != '\n'))
        !            93:     {
        !            94: 	Log::error("path name doesn't end in newline");
        !            95: 	return true;
        !            96:     }
        !            97:     name[i ? i - 1 : 0] = '\0';		// strip the trailing newline
        !            98:
        !            99:     (*event_handler)(event, request, name, closure);
        !           100:     return true;
        !           101: }
        !           102:
        !           103: void
        !           104: ServerConnection::send_monitor(ClientInterest::Type code, Request request,
        !           105: 			       const char *path, const Cred& cr)
        !           106: {
        !           107:
        !           108:     const char * cred_buf = cr.getAddlGroupsString();
        !           109:     if (cred_buf[0])
        !           110: 	mprintf("%c%d %d %d %s\n%c%s", code, request, cr.uid(), cr.gid(), path,
        !           111: 		'\0', cred_buf);
        !           112:     else
        !           113: 	mprintf("%c%d %d %d %s\n", code, request, cr.uid(), cr.gid(), path);
        !           114: }