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