1*0Sstevel@tonic-gate /*
2*0Sstevel@tonic-gate * CDDL HEADER START
3*0Sstevel@tonic-gate *
4*0Sstevel@tonic-gate * The contents of this file are subject to the terms of the
5*0Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only
6*0Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance
7*0Sstevel@tonic-gate * with the License.
8*0Sstevel@tonic-gate *
9*0Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10*0Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing.
11*0Sstevel@tonic-gate * See the License for the specific language governing permissions
12*0Sstevel@tonic-gate * and limitations under the License.
13*0Sstevel@tonic-gate *
14*0Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each
15*0Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16*0Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the
17*0Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying
18*0Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner]
19*0Sstevel@tonic-gate *
20*0Sstevel@tonic-gate * CDDL HEADER END
21*0Sstevel@tonic-gate */
22*0Sstevel@tonic-gate /*
23*0Sstevel@tonic-gate * Copyright (c) 1999 by Sun Microsystems, Inc.
24*0Sstevel@tonic-gate * All rights reserved.
25*0Sstevel@tonic-gate */
26*0Sstevel@tonic-gate
27*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI"
28*0Sstevel@tonic-gate
29*0Sstevel@tonic-gate #include <sys/stat.h>
30*0Sstevel@tonic-gate #include <fcntl.h>
31*0Sstevel@tonic-gate #include <unistd.h>
32*0Sstevel@tonic-gate #include <stdlib.h>
33*0Sstevel@tonic-gate #include <errno.h>
34*0Sstevel@tonic-gate #include <string.h>
35*0Sstevel@tonic-gate #include <strings.h>
36*0Sstevel@tonic-gate
37*0Sstevel@tonic-gate #include "prtable.h"
38*0Sstevel@tonic-gate #include "prutil.h"
39*0Sstevel@tonic-gate #include "prfile.h"
40*0Sstevel@tonic-gate
41*0Sstevel@tonic-gate #define FDS_TABLE_SIZE 1024
42*0Sstevel@tonic-gate
43*0Sstevel@tonic-gate static fd_t *fd_tbl = NULL;
44*0Sstevel@tonic-gate static int fd_max;
45*0Sstevel@tonic-gate static int fd_cnt;
46*0Sstevel@tonic-gate static int fd_cnt_cur;
47*0Sstevel@tonic-gate static int fd_cnt_old;
48*0Sstevel@tonic-gate static fds_t *fds_tbl[FDS_TABLE_SIZE];
49*0Sstevel@tonic-gate
50*0Sstevel@tonic-gate void
fd_init(int n)51*0Sstevel@tonic-gate fd_init(int n)
52*0Sstevel@tonic-gate {
53*0Sstevel@tonic-gate fd_max = n;
54*0Sstevel@tonic-gate fd_cnt = fd_cnt_cur = fd_cnt_old = 0;
55*0Sstevel@tonic-gate fd_tbl = Zalloc(sizeof (fd_t) * n);
56*0Sstevel@tonic-gate (void) memset(fds_tbl, 0, sizeof (fds_t *) * FDS_TABLE_SIZE);
57*0Sstevel@tonic-gate }
58*0Sstevel@tonic-gate
59*0Sstevel@tonic-gate void
fd_exit()60*0Sstevel@tonic-gate fd_exit()
61*0Sstevel@tonic-gate {
62*0Sstevel@tonic-gate if (fd_tbl)
63*0Sstevel@tonic-gate free(fd_tbl);
64*0Sstevel@tonic-gate }
65*0Sstevel@tonic-gate
66*0Sstevel@tonic-gate void
fd_close(fd_t * fdp)67*0Sstevel@tonic-gate fd_close(fd_t *fdp)
68*0Sstevel@tonic-gate {
69*0Sstevel@tonic-gate if (fdp) {
70*0Sstevel@tonic-gate if (fdp->fd_fd >= 0 && fdp->fd_name[0] != '\0') {
71*0Sstevel@tonic-gate (void) close(fdp->fd_fd);
72*0Sstevel@tonic-gate fd_cnt--;
73*0Sstevel@tonic-gate }
74*0Sstevel@tonic-gate
75*0Sstevel@tonic-gate (void) memset(fdp, 0, sizeof (fd_t));
76*0Sstevel@tonic-gate fdp->fd_fd = -1;
77*0Sstevel@tonic-gate }
78*0Sstevel@tonic-gate }
79*0Sstevel@tonic-gate
80*0Sstevel@tonic-gate void
fd_closeall()81*0Sstevel@tonic-gate fd_closeall()
82*0Sstevel@tonic-gate {
83*0Sstevel@tonic-gate fd_t *fdp = fd_tbl;
84*0Sstevel@tonic-gate int i;
85*0Sstevel@tonic-gate
86*0Sstevel@tonic-gate for (i = 0; i < fd_max; i++) {
87*0Sstevel@tonic-gate fd_close(fdp);
88*0Sstevel@tonic-gate fdp++;
89*0Sstevel@tonic-gate }
90*0Sstevel@tonic-gate }
91*0Sstevel@tonic-gate
92*0Sstevel@tonic-gate static void
fd_recycle()93*0Sstevel@tonic-gate fd_recycle()
94*0Sstevel@tonic-gate {
95*0Sstevel@tonic-gate fd_t *fdp = fd_tbl;
96*0Sstevel@tonic-gate int counter;
97*0Sstevel@tonic-gate int i;
98*0Sstevel@tonic-gate
99*0Sstevel@tonic-gate counter = abs(fd_cnt_old - fd_cnt) + NUM_RESERVED_FD;
100*0Sstevel@tonic-gate
101*0Sstevel@tonic-gate for (i = 0; i < fd_max; i++, fdp++) {
102*0Sstevel@tonic-gate
103*0Sstevel@tonic-gate if (fdp->fd_fd == -1)
104*0Sstevel@tonic-gate continue; /* skip recycled ones */
105*0Sstevel@tonic-gate
106*0Sstevel@tonic-gate if (fdp->fd_name[0] != '\0') { /* file has name */
107*0Sstevel@tonic-gate (void) close(fdp->fd_fd);
108*0Sstevel@tonic-gate fd_cnt--;
109*0Sstevel@tonic-gate counter--;
110*0Sstevel@tonic-gate fdp->fd_fd = -1;
111*0Sstevel@tonic-gate }
112*0Sstevel@tonic-gate
113*0Sstevel@tonic-gate if (counter == 0)
114*0Sstevel@tonic-gate break;
115*0Sstevel@tonic-gate }
116*0Sstevel@tonic-gate }
117*0Sstevel@tonic-gate
118*0Sstevel@tonic-gate fd_t *
fd_open(char * name,int flags,fd_t * fdp)119*0Sstevel@tonic-gate fd_open(char *name, int flags, fd_t *fdp)
120*0Sstevel@tonic-gate {
121*0Sstevel@tonic-gate fd_t *fdp_new;
122*0Sstevel@tonic-gate int fd;
123*0Sstevel@tonic-gate
124*0Sstevel@tonic-gate if (fd_cnt > fd_max - NUM_RESERVED_FD)
125*0Sstevel@tonic-gate fd_recycle();
126*0Sstevel@tonic-gate
127*0Sstevel@tonic-gate if (fdp != NULL) {
128*0Sstevel@tonic-gate if ((strcmp(fdp->fd_name, name) == 0) && (fdp->fd_fd >= 0)) {
129*0Sstevel@tonic-gate fd_cnt_cur++;
130*0Sstevel@tonic-gate return (fdp);
131*0Sstevel@tonic-gate }
132*0Sstevel@tonic-gate }
133*0Sstevel@tonic-gate
134*0Sstevel@tonic-gate again: fd = open(name, flags);
135*0Sstevel@tonic-gate
136*0Sstevel@tonic-gate if (fd == -1) {
137*0Sstevel@tonic-gate if ((errno == EMFILE) || (errno == ENFILE)) {
138*0Sstevel@tonic-gate fd_recycle();
139*0Sstevel@tonic-gate goto again;
140*0Sstevel@tonic-gate }
141*0Sstevel@tonic-gate fdp_new = NULL;
142*0Sstevel@tonic-gate } else {
143*0Sstevel@tonic-gate fdp_new = &fd_tbl[fd];
144*0Sstevel@tonic-gate fdp_new->fd_fd = fd;
145*0Sstevel@tonic-gate fdp_new->fd_flags = flags;
146*0Sstevel@tonic-gate (void) strcpy(fdp_new->fd_name, name);
147*0Sstevel@tonic-gate fd_cnt++;
148*0Sstevel@tonic-gate fd_cnt_cur++;
149*0Sstevel@tonic-gate }
150*0Sstevel@tonic-gate return (fdp_new);
151*0Sstevel@tonic-gate }
152*0Sstevel@tonic-gate
153*0Sstevel@tonic-gate int
fd_getfd(fd_t * fdp)154*0Sstevel@tonic-gate fd_getfd(fd_t *fdp)
155*0Sstevel@tonic-gate {
156*0Sstevel@tonic-gate return (fdp->fd_fd);
157*0Sstevel@tonic-gate }
158*0Sstevel@tonic-gate
159*0Sstevel@tonic-gate void
fd_update()160*0Sstevel@tonic-gate fd_update()
161*0Sstevel@tonic-gate {
162*0Sstevel@tonic-gate fd_cnt_old = fd_cnt_cur;
163*0Sstevel@tonic-gate fd_cnt_cur = 0;
164*0Sstevel@tonic-gate }
165*0Sstevel@tonic-gate
166*0Sstevel@tonic-gate fds_t *
fds_get(pid_t pid)167*0Sstevel@tonic-gate fds_get(pid_t pid)
168*0Sstevel@tonic-gate {
169*0Sstevel@tonic-gate fds_t *fdsp;
170*0Sstevel@tonic-gate int hash = pid % FDS_TABLE_SIZE;
171*0Sstevel@tonic-gate
172*0Sstevel@tonic-gate for (fdsp = fds_tbl[hash]; fdsp; fdsp = fdsp->fds_next)
173*0Sstevel@tonic-gate if (fdsp->fds_pid == pid) /* searching for pid */
174*0Sstevel@tonic-gate return (fdsp);
175*0Sstevel@tonic-gate
176*0Sstevel@tonic-gate fdsp = Zalloc(sizeof (fds_t)); /* adding new if pid was not found */
177*0Sstevel@tonic-gate fdsp->fds_pid = pid;
178*0Sstevel@tonic-gate fdsp->fds_next = fds_tbl[hash];
179*0Sstevel@tonic-gate fds_tbl[hash] = fdsp;
180*0Sstevel@tonic-gate return (fdsp);
181*0Sstevel@tonic-gate }
182*0Sstevel@tonic-gate
183*0Sstevel@tonic-gate void
fds_rm(pid_t pid)184*0Sstevel@tonic-gate fds_rm(pid_t pid)
185*0Sstevel@tonic-gate {
186*0Sstevel@tonic-gate fds_t *fds;
187*0Sstevel@tonic-gate fds_t *fds_prev = NULL;
188*0Sstevel@tonic-gate int hash = pid % FDS_TABLE_SIZE;
189*0Sstevel@tonic-gate
190*0Sstevel@tonic-gate for (fds = fds_tbl[hash]; fds && fds->fds_pid != pid;
191*0Sstevel@tonic-gate fds = fds->fds_next) /* finding pid */
192*0Sstevel@tonic-gate fds_prev = fds;
193*0Sstevel@tonic-gate
194*0Sstevel@tonic-gate if (fds) { /* if pid was found */
195*0Sstevel@tonic-gate
196*0Sstevel@tonic-gate fd_close(fds->fds_psinfo);
197*0Sstevel@tonic-gate fd_close(fds->fds_usage);
198*0Sstevel@tonic-gate fd_close(fds->fds_lpsinfo);
199*0Sstevel@tonic-gate fd_close(fds->fds_lusage);
200*0Sstevel@tonic-gate
201*0Sstevel@tonic-gate if (fds_prev)
202*0Sstevel@tonic-gate fds_prev->fds_next = fds->fds_next;
203*0Sstevel@tonic-gate else
204*0Sstevel@tonic-gate fds_tbl[hash] = fds->fds_next;
205*0Sstevel@tonic-gate
206*0Sstevel@tonic-gate free(fds);
207*0Sstevel@tonic-gate }
208*0Sstevel@tonic-gate }
209