projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| be172dde | 1 | #ifndef lint |
| d830bff6 | 2 | static char sccsid[] = "@(#)fetch.c 1.3 (Lucasfilm) %G%"; |
| be172dde SL |
3 | #endif |
| 4 | ||
| 5 | #include "systat.h" | |
| 6 | ||
| 7 | long | |
| 8 | getw(loc) | |
| 9 | int loc; | |
| 10 | { | |
| 11 | long word; | |
| 12 | ||
| 13 | lseek(kmem, loc, L_SET); | |
| 14 | if (read(kmem, &word, sizeof (word)) != sizeof (word)) | |
| 15 | printf("Error reading kmem at %x\n", loc); | |
| 16 | return (word); | |
| 17 | } | |
| 18 | ||
| 19 | char * | |
| 20 | getpname(pid, mproc) | |
| 21 | int pid; | |
| 22 | register struct proc *mproc; | |
| 23 | { | |
| 24 | register struct procs *pp; | |
| 25 | register char *namp; | |
| 26 | register int j; | |
| 27 | char *getcmd(); | |
| 28 | ||
| 29 | pp = procs; | |
| 30 | for (j = numprocs - 1; j >= 0; j--) { | |
| 31 | if (pp->pid == pid) | |
| 32 | return (pp->cmd); | |
| 33 | pp++; | |
| 34 | } | |
| 35 | if (j < 0) { | |
| 36 | if (numprocs < 200) { | |
| 37 | pp = &procs[numprocs]; | |
| 38 | namp = strncpy(pp->cmd, getcmd(pid, mproc), 15); | |
| 39 | pp->cmd[15] = 0; | |
| 40 | pp->pid = pid; | |
| 41 | numprocs++; | |
| 42 | } else | |
| 43 | namp = getcmd(pid, mproc); | |
| 44 | } | |
| 45 | return (namp); | |
| 46 | } | |
| 47 | ||
| 48 | union { | |
| 49 | struct user user; | |
| 50 | char upages[UPAGES][NBPG]; | |
| 51 | } user; | |
| 52 | #define u user.user | |
| 53 | ||
| 54 | char * | |
| 55 | getcmd(pid, mproc) | |
| 56 | int pid; | |
| 57 | register struct proc *mproc; | |
| 58 | { | |
| 59 | static char cmd[30]; | |
| 60 | ||
| 852c7064 SL |
61 | if (mproc == NULL || mproc->p_stat == SZOMB) |
| 62 | return (""); | |
| 63 | if (pid == 1) | |
| 64 | return ("swapper"); | |
| 65 | if (pid == 2) | |
| 66 | return ("pagedaemon"); | |
| 67 | if (mproc->p_flag&(SSYS|SWEXIT)) | |
| be172dde | 68 | return (""); |
| 852c7064 SL |
69 | if (getu(mproc) == 0) |
| 70 | return ("???"); | |
| be172dde SL |
71 | (void) strncpy(cmd, u.u_comm, sizeof (cmd)); |
| 72 | return (cmd); | |
| 73 | } | |
| 74 | ||
| d830bff6 SL |
75 | static int argaddr; |
| 76 | static int pcbpf; | |
| 77 | ||
| be172dde SL |
78 | getu(mproc) |
| 79 | register struct proc *mproc; | |
| 80 | { | |
| 81 | struct pte *pteaddr, apte; | |
| 82 | struct pte arguutl[UPAGES+CLSIZE]; | |
| 83 | register int i; | |
| 84 | int ncl, size; | |
| 85 | ||
| 86 | size = sizeof (struct user); | |
| 87 | if ((mproc->p_flag & SLOAD) == 0) { | |
| 88 | if (swap < 0) | |
| 89 | return (0); | |
| 90 | (void) lseek(swap, (long)dtob(mproc->p_swaddr), L_SET); | |
| 91 | if (read(swap, (char *)&user.user, size) != size) { | |
| 852c7064 | 92 | error("cant read u for pid %d", mproc->p_pid); |
| be172dde SL |
93 | return (0); |
| 94 | } | |
| 95 | pcbpf = 0; | |
| 96 | argaddr = 0; | |
| 97 | return (1); | |
| 98 | } | |
| 99 | pteaddr = &Usrptma[btokmx(mproc->p_p0br) + mproc->p_szpt - 1]; | |
| 100 | klseek(kmem, (long)pteaddr, L_SET); | |
| 101 | if (read(kmem, (char *)&apte, sizeof (apte)) != sizeof (apte)) { | |
| 852c7064 | 102 | error("cant read indir pte to get u for pid %d", mproc->p_pid); |
| be172dde SL |
103 | return (0); |
| 104 | } | |
| 105 | klseek(mem, | |
| 106 | (long)ctob(apte.pg_pfnum+1) - (UPAGES+CLSIZE) * sizeof (struct pte), | |
| 107 | L_SET); | |
| 108 | if (read(mem, (char *)arguutl, sizeof (arguutl)) != sizeof (arguutl)) { | |
| 852c7064 | 109 | error("cant read page table for u of pid %d", mproc->p_pid); |
| be172dde SL |
110 | return (0); |
| 111 | } | |
| 112 | if (arguutl[0].pg_fod == 0 && arguutl[0].pg_pfnum) | |
| 113 | argaddr = ctob(arguutl[0].pg_pfnum); | |
| 114 | else | |
| 115 | argaddr = 0; | |
| 116 | pcbpf = arguutl[CLSIZE].pg_pfnum; | |
| 117 | ncl = (size + NBPG*CLSIZE - 1) / (NBPG*CLSIZE); | |
| 118 | while (--ncl >= 0) { | |
| 119 | i = ncl * CLSIZE; | |
| 120 | klseek(mem, (long)ctob(arguutl[CLSIZE+i].pg_pfnum), L_SET); | |
| 121 | if (read(mem, user.upages[i], CLSIZE*NBPG) != CLSIZE*NBPG) { | |
| 852c7064 SL |
122 | error("cant read page %d of u of pid %d\n", |
| 123 | arguutl[CLSIZE+i].pg_pfnum, mproc->p_pid); | |
| 124 | return (0); | |
| be172dde SL |
125 | } |
| 126 | } | |
| 127 | return (1); | |
| 128 | } | |
| 129 | ||
| 130 | klseek(fd, loc, off) | |
| 131 | int fd; | |
| 132 | long loc; | |
| 133 | int off; | |
| 134 | { | |
| 135 | ||
| 136 | (void) lseek(fd, (long)loc, off); | |
| 137 | } |