/*
* Given a filename, walk the process tree querying all open files in the
* system, and display an indication of the file, which processes have it
* open, what they're doing with it, and who the user is (the typical use
* of this utility is prior to unmounting a filesystem).
*/
int showopen(const char *filename, int mode, int username, int (*print)(FILE *, const char *, ...))
{
DIR *dir;
struct dirent *dp;
const struct passwd *pw;
match_t match;
pid_t pid, usage;
uid_t uid;
int busy, error;
busy = -1;
(*print)(stderr, "%s: ", filename);
if ((error = buildmatch(filename, mode, &match)) != EOK) {
(*print)(stderr, "%s", strerror(error));
}
else if ((dir = opendir("/proc")) != NULL) {
busy = 0;
while ((dp = readdir(dir)) != NULL) {
if ((pid = atoi(dp->d_name)) != 0) {
if ((usage = howused(pid, &match)) != 0) {
(*print)(stdout, "%8d", pid);
if (usage & USED_CWD)
(*print)(stderr, "c");
if (usage & USED_OPEN)
(*print)(stderr, "o");
if (usage & USED_ROOT)
(*print)(stderr, "r");
if (usage & USED_CTTY)
(*print)(stderr, "y");
if (username && (uid = whois(pid)) != (uid_t)-1) {
if ((pw = getpwuid(uid)) != NULL)
(*print)(stderr, "(%s)", pw->pw_name);
else
(*print)(stderr, "(%d)", uid);
}
++busy;
}
}
}
closedir(dir);
}
(*print)(stderr, "\n");
return(busy);
}
int
main(int argc, char **argv)
{
int c, todo;
u_int interval; /* milliseconds */
int reps;
char *memf, *nlistf;
char errbuf[_POSIX2_LINE_MAX];
memf = nlistf = NULL;
interval = reps = todo = 0;
maxshowdevs = 2;
while ((c = getopt(argc, argv, "c:fiM:mN:n:p:stvw:z")) != -1) {
switch (c) {
case 'c':
reps = atoi(optarg);
break;
case 'f':
#ifdef notyet
todo |= FORKSTAT;
#else
errx(EX_USAGE, "sorry, -f is not (re)implemented yet");
#endif
break;
case 'i':
todo |= INTRSTAT;
break;
case 'M':
memf = optarg;
break;
case 'm':
todo |= MEMSTAT;
break;
case 'N':
nlistf = optarg;
break;
case 'n':
nflag = 1;
maxshowdevs = atoi(optarg);
if (maxshowdevs < 0)
errx(1, "number of devices %d is < 0",
maxshowdevs);
break;
case 'p':
if (buildmatch(optarg, &matches, &num_matches) != 0)
errx(1, "%s", devstat_errbuf);
break;
case 's':
todo |= SUMSTAT;
break;
case 't':
#ifdef notyet
todo |= TIMESTAT;
#else
errx(EX_USAGE, "sorry, -t is not (re)implemented yet");
#endif
break;
case 'v':
++verbose;
break;
case 'w':
interval = (u_int)(strtod(optarg, NULL) * 1000.0);
break;
case 'z':
todo |= ZMEMSTAT;
break;
default:
usage();
}
}
argc -= optind;
argv += optind;
if (todo == 0)
todo = VMSTAT;
/*
* Discard setgid privileges if not the running kernel so that bad
* guys can't print interesting stuff from kernel memory.
*/
if (nlistf != NULL || memf != NULL)
setgid(getgid());
kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf);
if (kd == NULL)
errx(1, "kvm_openfiles: %s", errbuf);
if ((c = kvm_nlist(kd, namelist)) != 0) {
if (c > 0) {
warnx("undefined symbols:");
for (c = 0; c < (int)__arysize(namelist); c++)
if (namelist[c].n_type == 0)
fprintf(stderr, " %s",
namelist[c].n_name);
fputc('\n', stderr);
} else
warnx("kvm_nlist: %s", kvm_geterr(kd));
exit(1);
}
if (todo & VMSTAT) {
struct winsize winsize;
/*
* Make sure that the userland devstat version matches the
* kernel devstat version. If not, exit and print a
* message informing the user of his mistake.
*/
if (checkversion() < 0)
errx(1, "%s", devstat_errbuf);
argv = getdrivedata(argv);
winsize.ws_row = 0;
ioctl(STDOUT_FILENO, TIOCGWINSZ, (char *)&winsize);
if (winsize.ws_row > 0)
winlines = winsize.ws_row;
}
#define BACKWARD_COMPATIBILITY
#ifdef BACKWARD_COMPATIBILITY
if (*argv) {
interval = (u_int)(strtod(*argv, NULL) * 1000.0);
if (*++argv)
reps = atoi(*argv);
}
#endif
if (interval) {
if (!reps)
reps = -1;
} else if (reps) {
interval = 1000;
}
#ifdef notyet
if (todo & FORKSTAT)
doforkst();
#endif
if (todo & MEMSTAT)
domem();
if (todo & ZMEMSTAT)
dozmem();
if (todo & SUMSTAT)
dosum();
#ifdef notyet
if (todo & TIMESTAT)
dotimes();
#endif
if (todo & INTRSTAT)
dointr();
if (todo & VMSTAT)
dovmstat(interval, reps);
exit(0);
}
