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Implement /proc/$$/limits.

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PR:		207386
Submitted by:	Szymon Śliwa <knight.erraunt@gmail.com>
MFC after:	3 weeks
This commit is contained in:
Dag-Erling Smørgrav 2016-02-21 14:56:05 +00:00
parent 674677bd08
commit f4d6a773f8
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=295856
1 changed files with 64 additions and 0 deletions
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64
sys/compat/linprocfs/linprocfs.c
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@ -61,6 +61,7 @@ __FBSDID("$FreeBSD$");
#include <sys/proc.h>
#include <sys/ptrace.h>
#include <sys/resourcevar.h>
#include <sys/resource.h>
#include <sys/sbuf.h>
#include <sys/sem.h>
#include <sys/smp.h>
@ -1366,6 +1367,67 @@ linprocfs_dofdescfs(PFS_FILL_ARGS)
return (0);
}
/*
* Filler function for proc/pid/limits
*/
#define RLIM_NONE -1
static const struct limit_info {
const char *desc;
const char *unit;
unsigned long long rlim_id;
} limits_info[] = {
{ "Max cpu time", "seconds", RLIMIT_CPU },
{ "Max file size", "bytes", RLIMIT_FSIZE },
{ "Max data size", "bytes", RLIMIT_DATA },
{ "Max stack size", "bytes", RLIMIT_STACK },
{ "Max core file size", "bytes", RLIMIT_CORE },
{ "Max resident set", "bytes", RLIMIT_RSS },
{ "Max processes", "processes", RLIMIT_NPROC },
{ "Max open files", "files", RLIMIT_NOFILE },
{ "Max locked memory", "bytes", RLIMIT_MEMLOCK },
{ "Max address space", "bytes", RLIMIT_AS },
{ "Max file locks", "locks", RLIM_INFINITY },
{ "Max pending signals", "signals", RLIM_INFINITY },
{ "Max msgqueue size", "bytes", RLIM_NONE },
{ "Max nice priority", "", RLIM_NONE },
{ "Max realtime priority", "", RLIM_NONE },
{ "Max realtime timeout", "us", RLIM_INFINITY },
{ 0, 0, 0 }
};
static int
linprocfs_doproclimits(PFS_FILL_ARGS)
{
const struct limit_info *li;
struct rlimit li_rlimits;
struct plimit *cur_proc_lim;
cur_proc_lim = lim_alloc();
lim_copy(cur_proc_lim, p->p_limit);
sbuf_printf(sb, "%-26s%-21s%-21s%-10s\n", "Limit", "Soft Limit",
"Hard Limit", "Units");
for (li = limits_info; li->desc != NULL; ++li) {
if (li->rlim_id != RLIM_INFINITY && li->rlim_id != RLIM_NONE)
li_rlimits = cur_proc_lim->pl_rlimit[li->rlim_id];
else {
li_rlimits.rlim_cur = 0;
li_rlimits.rlim_max = 0;
}
if (li->rlim_id == RLIM_INFINITY ||
li_rlimits.rlim_cur == RLIM_INFINITY)
sbuf_printf(sb, "%-26s%-21s%-21s%-10s\n",
li->desc, "unlimited", "unlimited", li->unit);
else
sbuf_printf(sb, "%-26s%-21ld%-21ld%-10s\n",
li->desc, (long)li_rlimits.rlim_cur,
(long)li_rlimits.rlim_max, li->unit);
}
lim_free(cur_proc_lim);
return (0);
}
/*
* Filler function for proc/sys/kernel/random/uuid
@ -1504,6 +1566,8 @@ linprocfs_init(PFS_INIT_ARGS)
NULL, NULL, NULL, 0);
pfs_create_file(dir, "auxv", &linprocfs_doauxv,
NULL, &procfs_candebug, NULL, PFS_RD|PFS_RAWRD);
pfs_create_file(dir, "limits", &linprocfs_doproclimits,
NULL, NULL, NULL, PFS_RD);
/* /proc/scsi/... */
dir = pfs_create_dir(root, "scsi", NULL, NULL, NULL, 0);