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Make use of newly added libprocstat(3) ability to extract procstat

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info from a process core file.

So now one can run procstat(1) on a process core e.g. to get a list of
files opened by a process when it crashed:

root@lisa:/ # procstat -f /root/vi.core
  PID COMM               FD T V FLAGS     REF  OFFSET PRO NAME
  658 vi               text v r r--------   -       - -   /usr/bin/vi
  658 vi               ctty v c rw-------   -       - -   /dev/pts/0
  658 vi                cwd v d r--------   -       - -   /root
  658 vi               root v d r--------   -       - -   /
  658 vi                  0 v c rw-------  11    3208 -   /dev/pts/0
  658 vi                  1 v c rw-------  11    3208 -   /dev/pts/0
  658 vi                  2 v c rw-------  11    3208 -   /dev/pts/0
  658 vi                  3 v r r----n-l-   1       0 -   /tmp/vi.0AYKz3Lps7
  658 vi                  4 v r rw-------   1       0 -   /var/tmp/vi.recover/vi.GaGYsz
  658 vi                  5 v r rw-------   1       0 -   -

PR:		kern/173723
Suggested by:	jhb
MFC after:	1 month
This commit is contained in:
Mikolaj Golub 2013-04-20 08:22:09 +00:00
parent d86fa0c72c
commit 948baa409b
2 changed files with 31 additions and 16 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
usr.bin/procstat/procstat.1
View File

@ -25,7 +25,7 @@
.\"
.\" $FreeBSD$
.\"
.Dd July 11, 2012
.Dd April 20, 2013
.Dt PROCSTAT 1
.Os
.Sh NAME
@ -38,7 +38,7 @@
.Op Fl C
.Op Fl w Ar interval
.Op Fl b | c | e | f | i | j | k | l | s | t | v | x
.Op Fl a | Ar pid ...
.Op Fl a | Ar pid | Ar core ...
.Sh DESCRIPTION
The
.Nm
@ -47,6 +47,8 @@ utility displays detailed information about the processes identified by the
arguments, or if the
.Fl a
flag is used, all processes.
It can also display information extracted from a process core file, if
the core file is specified as the argument.
.Pp
By default, basic process statistics are printed; one of the following
options may be specified in order to select more detailed process information

41
usr.bin/procstat/procstat.c
View File

@ -50,7 +50,7 @@ usage(void)
fprintf(stderr, "usage: procstat [-h] [-C] [-M core] [-N system] "
"[-w interval] \n");
fprintf(stderr, " [-b | -c | -e | -f | -i | -j | -k | "
"-l | -s | -t | -v | -x] [-a | pid ...]\n");
"-l | -s | -t | -v | -x] [-a | pid | core ...]\n");
exit(EX_USAGE);
}
@ -116,7 +116,7 @@ main(int argc, char *argv[])
int ch, interval, tmp;
int i;
struct kinfo_proc *p;
struct procstat *prstat;
struct procstat *prstat, *cprstat;
long l;
pid_t pid;
char *dummy;
@ -255,19 +255,32 @@ main(int argc, char *argv[])
}
for (i = 0; i < argc; i++) {
l = strtol(argv[i], &dummy, 10);
if (*dummy != '\0')
usage();
if (l < 0)
usage();
pid = l;
p = procstat_getprocs(prstat, KERN_PROC_PID, pid, &cnt);
if (p == NULL)
errx(1, "procstat_getprocs()");
if (cnt != 0)
procstat(prstat, p);
procstat_freeprocs(prstat, p);
if (*dummy == '\0') {
if (l < 0)
usage();
pid = l;
p = procstat_getprocs(prstat, KERN_PROC_PID, pid, &cnt);
if (p == NULL)
errx(1, "procstat_getprocs()");
if (cnt != 0)
procstat(prstat, p);
procstat_freeprocs(prstat, p);
} else {
cprstat = procstat_open_core(argv[i]);
if (cprstat == NULL) {
warnx("procstat_open()");
continue;
}
p = procstat_getprocs(cprstat, KERN_PROC_PID,
-1, &cnt);
if (p == NULL)
errx(1, "procstat_getprocs()");
if (cnt != 0)
procstat(cprstat, p);
procstat_freeprocs(cprstat, p);
procstat_close(cprstat);
}
/* Suppress header after first process. */
hflag = 1;
}