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- /*
- * UNIX An implementation of the AF_UNIX network domain for the
- * LINUX operating system. UNIX is implemented using the
- * BSD Socket interface as the means of communication with
- * the user level.
- *
- * The functions in this file provide an interface between
- * the PROC file system and the "unix" family of networking
- * protocols. It is mainly used for debugging and statistics.
- *
- * Version: @(#)proc.c 1.0.4 05/23/93
- *
- * Authors: Ross Biro, <bir7@leland.Stanford.Edu>
- * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
- * Gerald J. Heim, <heim@peanuts.informatik.uni-tuebingen.de>
- * Fred Baumgarten, <dc6iq@insu1.etec.uni-kalrsruhe.de>
- *
- * Fixes:
- * Dmitry Gorodchanin : /proc locking fix
- * Mathijs Maassen : unbound /proc fix.
- * Alan Cox : Fix sock=NULL race
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- */
- #include <linux/autoconf.h>
- #include <linux/sched.h>
- #include <linux/string.h>
- #include <linux/socket.h>
- #include <linux/net.h>
- #include <linux/un.h>
- #include <linux/param.h>
- #include "unix.h"
-
-
- /* Called from PROCfs. */
- int unix_get_info(char *buffer, char **start, off_t offset, int length)
- {
- off_t pos=0;
- off_t begin=0;
- int len=0;
- int i;
- unsigned long flags;
- socket_state s_state;
- short s_type;
- long s_flags;
-
- len += sprintf(buffer, "Num RefCount Protocol Flags Type St Path\n");
-
- for(i = 0; i < NSOCKETS_UNIX; i++)
- {
- save_flags(flags);
- cli();
- if (unix_datas[i].refcnt>0 && unix_datas[i].socket!=NULL)
- {
- /* sprintf is slow... lock only for the variable reads */
- s_type=unix_datas[i].socket->type;
- s_flags=unix_datas[i].socket->flags;
- s_state=unix_datas[i].socket->state;
- restore_flags(flags);
- len += sprintf(buffer+len, "%2d: %08X %08X %08lX %04X %02X", i,
- unix_datas[i].refcnt,
- unix_datas[i].protocol,
- s_flags,
- s_type,
- s_state
- );
-
- /* If socket is bound to a filename, we'll print it. */
- if(unix_datas[i].sockaddr_len>0)
- {
- len += sprintf(buffer+len, " %s\n",
- unix_datas[i].sockaddr_un.sun_path);
- }
- else
- { /* just add a newline */
- buffer[len++]='\n';
- }
-
- pos=begin+len;
- if(pos<offset)
- {
- len=0;
- begin=pos;
- }
- if(pos>offset+length)
- break;
- }
- else
- restore_flags(flags);
- }
-
- *start=buffer+(offset-begin);
- len-=(offset-begin);
- if(len>length)
- len=length;
- return len;
- }
-