Commit | Line | Data |
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da6efb07 TL |
1 | #include <stdio.h> |
2 | #include <a.out.h> | |
3 | #include <param.h> | |
4 | #include <proc.h> | |
5 | #include <sys/stat.h> | |
6 | struct stat xstat; | |
7 | struct proc mproc[NPROC]; | |
8 | struct nlist nl[] | |
9 | { { "_proc"}, | |
10 | { ""}, | |
11 | }; | |
12 | int err; | |
13 | main(argc,argv) char **argv; | |
14 | { int i,j; | |
15 | if(argc<=1) exit(0); | |
16 | for(i=1;i<argc;i++) | |
17 | { if((j=isalock(argv[i]))>0) | |
18 | if(isapid(j)) | |
19 | { fprintf(stderr,"recovery: %s in use\n",argv[i]); | |
20 | err=1; | |
21 | } | |
22 | else unlink(argv[i]); | |
23 | else fprintf(stderr,"reocvery: %s not a lock\n",argv[i]); | |
24 | } | |
25 | exit(err); | |
26 | } | |
27 | isalock(s) char *s; | |
28 | { int pid,fd; | |
29 | if(stat(s,&xstat)<0) return(0); | |
30 | if(xstat.st_size!=2) return(0); | |
31 | fd=open(s,0); | |
32 | if(fd<0) return(-1); | |
33 | read(fd,&pid,2); | |
34 | close(fd); | |
35 | return(pid); | |
36 | } | |
37 | int gotpids,pids[NPROC]; | |
38 | isapid(n) | |
39 | { int i; | |
40 | if(gotpids==0) getpids(); | |
41 | for(i=0;i<NPROC;i++) | |
42 | if(n==pids[i]) return(1); | |
43 | return(0); | |
44 | } | |
45 | getpids() | |
46 | { int i,mem; | |
47 | nlist("/unix",nl); | |
48 | if(nl[0].n_type==0) | |
49 | { fprintf(stderr,"no namelist, no lock recovery\n"); | |
50 | exit(1); | |
51 | } | |
52 | mem=open("/dev/mem",0); | |
53 | lseek(mem,(long)nl[0].n_value,0); | |
54 | read(mem,mproc,sizeof(mproc)); | |
55 | if(mproc[0].p_pid != 0) | |
56 | { fprintf(stderr,"/unix not loaded, no lock recovery\n"); | |
57 | exit(1); | |
58 | } | |
59 | for(i=0;i<NPROC;i++) | |
60 | { if(mproc[i].p_stat==0 || | |
61 | mproc[i].p_stat==SZOMB) | |
62 | pids[i]=0; | |
63 | else pids[i]=mproc[i].p_pid; | |
64 | } | |
65 | gotpids=1; | |
66 | } | |
67 | unlock(s) char *s; | |
68 | { | |
69 | unlink(s); | |
70 | } |