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- #include <u.h>
- #include <libc.h>
- #include <bio.h>
- void ps(char*);
- void error(char*);
- int cmp(void*, void*);
- Biobuf bout;
- int pflag;
- int aflag;
- void
- main(int argc, char *argv[])
- {
- int fd, i, tot, none = 1;
- Dir *dir, **mem;
- ARGBEGIN {
- case 'a':
- aflag++;
- break;
- case 'p':
- pflag++;
- break;
- } ARGEND;
- Binit(&bout, 1, OWRITE);
- if(chdir("/proc")==-1)
- error("/proc");
- fd=open(".", OREAD);
- if(fd<0)
- error("/proc");
- tot = dirreadall(fd, &dir);
- if(tot <= 0){
- fprint(2, "ps: empty directory /proc\n");
- exits("empty");
- }
- mem = malloc(tot*sizeof(Dir*));
- for(i=0; i<tot; i++)
- mem[i] = dir++;
- qsort(mem, tot, sizeof(Dir*), cmp);
- for(i=0; i<tot; i++){
- ps(mem[i]->name);
- none = 0;
- }
- if(none)
- error("no processes; bad #p");
- exits(0);
- }
- void
- ps(char *s)
- {
- int i, n, fd;
- char buf[64];
- int basepri, pri;
- long utime, stime, size;
- char pbuf[8];
- #define NAMELEN 28
- char status[2*NAMELEN+12+9*12+1];
- char args[256];
- char *p;
- sprint(buf, "%s/status", s);
- fd = open(buf, OREAD);
- if(fd<0)
- return;
- n = read(fd, status, sizeof status-1);
- close(fd);
- if(n <= 0)
- return;
- status[n] = '\0';
- p = strchr(status, ' ');
- if(!p)
- return;
- *p = 0;
- p = strchr(status+NAMELEN, ' ');
- if(!p)
- return;
- *p = 0;
- status[2*NAMELEN+12-1] = 0;
- utime = atol(status+2*NAMELEN+12)/1000;
- stime = atol(status+2*NAMELEN+12+1*12)/1000;
- size = atol(status+2*NAMELEN+12+6*12);
- if(pflag){
- basepri = atol(status+2*NAMELEN+12+7*12);
- pri = atol(status+2*NAMELEN+12+8*12);
- sprint(pbuf, " %2d %2d", basepri, pri);
- } else
- pbuf[0] = 0;
- Bprint(&bout, "%-10s %8s %4ld:%.2ld %3ld:%.2ld%s %7ldK %-.8s ",
- status+NAMELEN,
- s,
- utime/60, utime%60,
- stime/60, stime%60,
- pbuf,
- size,
- status+2*NAMELEN);
- if(aflag == 0){
- Noargs:
- Bprint(&bout, "%s\n", status);
- return;
- }
- sprint(buf, "%s/args", s);
- fd = open(buf, OREAD);
- if(fd < 0)
- goto Badargs;
- n = read(fd, args, sizeof args-1);
- close(fd);
- if(n < 0)
- goto Badargs;
- if(n == 0)
- goto Noargs;
- args[n] = '\0';
- for(i=0; i<n; i++)
- if(args[i] == '\n')
- args[i] = ' ';
- Bprint(&bout, "%s\n", args);
- return;
- Badargs:
- Bprint(&bout, "%s ?\n", status);
- }
- void
- error(char *s)
- {
- fprint(2, "ps: %s: ", s);
- perror("error");
- exits(s);
- }
- int
- cmp(void *va, void *vb)
- {
- Dir **a, **b;
- a = va;
- b = vb;
- return atoi((*a)->name) - atoi((*b)->name);
- }
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