Commit | Line | Data |
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5e2a83c1 | 1 | /*- |
ff1f338c | 2 | * Copyright (c) 1989, 1992 The Regents of the University of California. |
5e2a83c1 KS |
3 | * All rights reserved. |
4 | * | |
5 | * %sccs.include.redist.c% | |
6 | */ | |
7 | ||
8 | #if defined(LIBC_SCCS) && !defined(lint) | |
03e5e831 | 9 | static char sccsid[] = "@(#)kvm_file.c 5.3 (Berkeley) %G%"; |
5e2a83c1 KS |
10 | #endif /* LIBC_SCCS and not lint */ |
11 | ||
12 | /* | |
13 | * File list interface for kvm. pstat, fstat and netstat are | |
14 | * users of this code, so we've factored it out into a separate module. | |
15 | * Thus, we keep this grunge out of the other kvm applications (i.e., | |
16 | * most other applications are interested only in open/close/read/nlist). | |
17 | */ | |
18 | ||
19 | #include <sys/param.h> | |
20 | #include <sys/user.h> | |
21 | #include <sys/proc.h> | |
22 | #include <sys/exec.h> | |
23 | #define KERNEL | |
24 | #include <sys/file.h> | |
25 | #undef KERNEL | |
26 | #include <sys/stat.h> | |
27 | #include <sys/ioctl.h> | |
28 | #include <sys/tty.h> | |
29 | #include <nlist.h> | |
30 | #include <kvm.h> | |
31 | ||
32 | #include <vm/vm.h> | |
33 | #include <vm/vm_param.h> | |
34 | #include <vm/swap_pager.h> | |
35 | ||
03e5e831 | 36 | #include <sys/sysctl.h> |
5e2a83c1 KS |
37 | |
38 | #include <limits.h> | |
39 | #include <ndbm.h> | |
40 | #include <paths.h> | |
41 | ||
42 | #include "kvm_private.h" | |
43 | ||
44 | #define KREAD(kd, addr, obj) \ | |
45 | (kvm_read(kd, addr, (char *)(obj), sizeof(*obj)) != sizeof(*obj)) | |
46 | ||
47 | /* | |
48 | * Get file structures. | |
49 | */ | |
50 | static | |
51 | kvm_deadfiles(kd, op, arg, filehead_o, nfiles) | |
52 | kvm_t *kd; | |
53 | int op, arg, nfiles; | |
54 | off_t filehead_o; | |
55 | { | |
56 | int buflen = kd->arglen, needed = buflen, error, n = 0; | |
57 | struct file *fp, file, *filehead; | |
58 | register char *where = kd->argspc; | |
59 | char *start = where; | |
60 | ||
61 | /* | |
62 | * first copyout filehead | |
63 | */ | |
64 | if (buflen > sizeof (filehead)) { | |
65 | if (KREAD(kd, filehead_o, &filehead)) { | |
66 | _kvm_err(kd, kd->program, "can't read filehead"); | |
67 | return (0); | |
68 | } | |
69 | buflen -= sizeof (filehead); | |
70 | where += sizeof (filehead); | |
71 | *(struct file **)kd->argspc = filehead; | |
72 | } | |
73 | /* | |
74 | * followed by an array of file structures | |
75 | */ | |
76 | for (fp = filehead; fp != NULL; fp = fp->f_filef) { | |
77 | if (buflen > sizeof (struct file)) { | |
78 | if (KREAD(kd, (off_t)fp, ((struct file *)where))) { | |
79 | _kvm_err(kd, kd->program, "can't read kfp"); | |
80 | return (0); | |
81 | } | |
82 | buflen -= sizeof (struct file); | |
83 | where += sizeof (struct file); | |
84 | n++; | |
85 | } | |
86 | } | |
87 | if (n != nfiles) { | |
88 | _kvm_err(kd, kd->program, "inconsistant nfiles"); | |
89 | return (0); | |
90 | } | |
91 | return (nfiles); | |
92 | } | |
93 | ||
94 | char * | |
95 | kvm_getfiles(kd, op, arg, cnt) | |
96 | kvm_t *kd; | |
97 | int op, arg; | |
98 | int *cnt; | |
99 | { | |
03e5e831 | 100 | int mib[2], size, st, nfiles; |
5e2a83c1 KS |
101 | struct file *filehead, *fp, *fplim; |
102 | ||
103 | if (ISALIVE(kd)) { | |
104 | size = 0; | |
03e5e831 KM |
105 | mib[0] = CTL_KERN; |
106 | mib[1] = KERN_FILE; | |
107 | st = sysctl(mib, 2, NULL, &size, NULL, 0); | |
108 | if (st == -1) { | |
5e2a83c1 KS |
109 | _kvm_syserr(kd, kd->program, "kvm_getprocs"); |
110 | return (0); | |
111 | } | |
112 | if (kd->argspc == 0) | |
03e5e831 KM |
113 | kd->argspc = (char *)_kvm_malloc(kd, size); |
114 | else if (kd->arglen < size) | |
115 | kd->argspc = (char *)_kvm_realloc(kd, kd->argspc, size); | |
5e2a83c1 KS |
116 | if (kd->argspc == 0) |
117 | return (0); | |
03e5e831 KM |
118 | kd->arglen = size; |
119 | st = sysctl(mib, 2, kd->argspc, &size, NULL, 0); | |
120 | if (st == -1 || size < sizeof(filehead)) { | |
5e2a83c1 KS |
121 | _kvm_syserr(kd, kd->program, "kvm_getfiles"); |
122 | return (0); | |
123 | } | |
124 | filehead = *(struct file **)kd->argspc; | |
125 | fp = (struct file *)(kd->argspc + sizeof (filehead)); | |
126 | fplim = (struct file *)(kd->argspc + size); | |
127 | for (nfiles = 0; filehead && (fp < fplim); nfiles++, fp++) | |
128 | filehead = fp->f_filef; | |
129 | } else { | |
130 | struct nlist nl[3], *p; | |
131 | ||
132 | nl[0].n_name = "_filehead"; | |
133 | nl[1].n_name = "_nfiles"; | |
134 | nl[2].n_name = 0; | |
135 | ||
136 | if (kvm_nlist(kd, nl) != 0) { | |
137 | for (p = nl; p->n_type != 0; ++p) | |
138 | ; | |
139 | _kvm_err(kd, kd->program, | |
140 | "%s: no such symbol", p->n_name); | |
141 | return (0); | |
142 | } | |
143 | if (KREAD(kd, nl[0].n_value, &nfiles)) { | |
144 | _kvm_err(kd, kd->program, "can't read nfiles"); | |
145 | return (0); | |
146 | } | |
147 | size = sizeof(filehead) + (nfiles + 10) * sizeof(struct file); | |
148 | if (kd->argspc == 0) | |
03e5e831 KM |
149 | kd->argspc = (char *)_kvm_malloc(kd, size); |
150 | else if (kd->arglen < size) | |
151 | kd->argspc = (char *)_kvm_realloc(kd, kd->argspc, size); | |
5e2a83c1 KS |
152 | if (kd->argspc == 0) |
153 | return (0); | |
03e5e831 | 154 | kd->arglen = size; |
5e2a83c1 KS |
155 | nfiles = kvm_deadfiles(kd, op, arg, nl[1].n_value, nfiles); |
156 | if (nfiles == 0) | |
157 | return (0); | |
158 | } | |
159 | *cnt = nfiles; | |
160 | return (kd->argspc); | |
161 | } |