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07ed1e09 KM |
1 | /* |
2 | * Copyright (c) 1980 Regents of the University of California. | |
3 | * All rights reserved. The Berkeley software License Agreement | |
4 | * specifies the terms and conditions for redistribution. | |
5 | */ | |
6 | ||
be172dde | 7 | #ifndef lint |
07ed1e09 KM |
8 | static char sccsid[] = "@(#)fetch.c 5.1 (Berkeley) %G%"; |
9 | #endif not lint | |
be172dde SL |
10 | |
11 | #include "systat.h" | |
855ff304 KM |
12 | #include <sys/dir.h> |
13 | #include <sys/user.h> | |
14 | #include <sys/proc.h> | |
855ff304 KM |
15 | #include <sys/vmmac.h> |
16 | #include <machine/pte.h> | |
17 | #include <pwd.h> | |
be172dde SL |
18 | |
19 | long | |
20 | getw(loc) | |
21 | int loc; | |
22 | { | |
23 | long word; | |
24 | ||
25 | lseek(kmem, loc, L_SET); | |
26 | if (read(kmem, &word, sizeof (word)) != sizeof (word)) | |
27 | printf("Error reading kmem at %x\n", loc); | |
28 | return (word); | |
29 | } | |
30 | ||
31 | char * | |
32 | getpname(pid, mproc) | |
33 | int pid; | |
34 | register struct proc *mproc; | |
35 | { | |
36 | register struct procs *pp; | |
37 | register char *namp; | |
38 | register int j; | |
39 | char *getcmd(); | |
40 | ||
41 | pp = procs; | |
42 | for (j = numprocs - 1; j >= 0; j--) { | |
43 | if (pp->pid == pid) | |
44 | return (pp->cmd); | |
45 | pp++; | |
46 | } | |
47 | if (j < 0) { | |
48 | if (numprocs < 200) { | |
49 | pp = &procs[numprocs]; | |
50 | namp = strncpy(pp->cmd, getcmd(pid, mproc), 15); | |
51 | pp->cmd[15] = 0; | |
52 | pp->pid = pid; | |
53 | numprocs++; | |
54 | } else | |
55 | namp = getcmd(pid, mproc); | |
56 | } | |
57 | return (namp); | |
58 | } | |
59 | ||
60 | union { | |
61 | struct user user; | |
62 | char upages[UPAGES][NBPG]; | |
63 | } user; | |
64 | #define u user.user | |
65 | ||
66 | char * | |
67 | getcmd(pid, mproc) | |
68 | int pid; | |
69 | register struct proc *mproc; | |
70 | { | |
71 | static char cmd[30]; | |
72 | ||
852c7064 SL |
73 | if (mproc == NULL || mproc->p_stat == SZOMB) |
74 | return (""); | |
75 | if (pid == 1) | |
76 | return ("swapper"); | |
77 | if (pid == 2) | |
78 | return ("pagedaemon"); | |
79 | if (mproc->p_flag&(SSYS|SWEXIT)) | |
be172dde | 80 | return (""); |
852c7064 SL |
81 | if (getu(mproc) == 0) |
82 | return ("???"); | |
be172dde SL |
83 | (void) strncpy(cmd, u.u_comm, sizeof (cmd)); |
84 | return (cmd); | |
85 | } | |
86 | ||
d830bff6 SL |
87 | static int argaddr; |
88 | static int pcbpf; | |
89 | ||
be172dde SL |
90 | getu(mproc) |
91 | register struct proc *mproc; | |
92 | { | |
93 | struct pte *pteaddr, apte; | |
94 | struct pte arguutl[UPAGES+CLSIZE]; | |
95 | register int i; | |
96 | int ncl, size; | |
97 | ||
98 | size = sizeof (struct user); | |
99 | if ((mproc->p_flag & SLOAD) == 0) { | |
100 | if (swap < 0) | |
101 | return (0); | |
102 | (void) lseek(swap, (long)dtob(mproc->p_swaddr), L_SET); | |
103 | if (read(swap, (char *)&user.user, size) != size) { | |
852c7064 | 104 | error("cant read u for pid %d", mproc->p_pid); |
be172dde SL |
105 | return (0); |
106 | } | |
107 | pcbpf = 0; | |
108 | argaddr = 0; | |
109 | return (1); | |
110 | } | |
111 | pteaddr = &Usrptma[btokmx(mproc->p_p0br) + mproc->p_szpt - 1]; | |
112 | klseek(kmem, (long)pteaddr, L_SET); | |
113 | if (read(kmem, (char *)&apte, sizeof (apte)) != sizeof (apte)) { | |
852c7064 | 114 | error("cant read indir pte to get u for pid %d", mproc->p_pid); |
be172dde SL |
115 | return (0); |
116 | } | |
117 | klseek(mem, | |
118 | (long)ctob(apte.pg_pfnum+1) - (UPAGES+CLSIZE) * sizeof (struct pte), | |
119 | L_SET); | |
120 | if (read(mem, (char *)arguutl, sizeof (arguutl)) != sizeof (arguutl)) { | |
852c7064 | 121 | error("cant read page table for u of pid %d", mproc->p_pid); |
be172dde SL |
122 | return (0); |
123 | } | |
124 | if (arguutl[0].pg_fod == 0 && arguutl[0].pg_pfnum) | |
125 | argaddr = ctob(arguutl[0].pg_pfnum); | |
126 | else | |
127 | argaddr = 0; | |
128 | pcbpf = arguutl[CLSIZE].pg_pfnum; | |
129 | ncl = (size + NBPG*CLSIZE - 1) / (NBPG*CLSIZE); | |
130 | while (--ncl >= 0) { | |
131 | i = ncl * CLSIZE; | |
132 | klseek(mem, (long)ctob(arguutl[CLSIZE+i].pg_pfnum), L_SET); | |
133 | if (read(mem, user.upages[i], CLSIZE*NBPG) != CLSIZE*NBPG) { | |
852c7064 SL |
134 | error("cant read page %d of u of pid %d\n", |
135 | arguutl[CLSIZE+i].pg_pfnum, mproc->p_pid); | |
136 | return (0); | |
be172dde SL |
137 | } |
138 | } | |
139 | return (1); | |
140 | } | |
141 | ||
142 | klseek(fd, loc, off) | |
143 | int fd; | |
144 | long loc; | |
145 | int off; | |
146 | { | |
147 | ||
148 | (void) lseek(fd, (long)loc, off); | |
149 | } |