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procps/proc/pids.c
Jim Warner 65000d7c64 library: miscellaneous tweaks for code and/or comments 
Summarized below, miscellany addressed in this commit:

. deleted extraneous newline(s) for consistent spacing

Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-03-12 14:52:56 +11:00

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/*
* pids.c - task/thread/process related declarations for libproc
*
* Copyright (C) 1998-2005 Albert Cahalan
* Copyright (C) 2015 Craig Small <csmall@enc.com.au>
* Copyright (C) 2015 Jim Warner <james.warner@comcast.net>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
//efine _GNU_SOURCE // for qsort_r
#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <proc/pids.h>
#include <proc/sysinfo.h>
#include <proc/uptime.h>
#include "procps-private.h"
#include "devname.h" // and a few headers for our
#include "readproc.h" // bridged libprocps support
#include "wchan.h" // ( maybe just temporary? )
//#define UNREF_RPTHASH // report on hashing, at uref time
//#define FPRINT_STACKS // enable validate_stacks output
#define FILL_ID_MAX 255 // upper limit for pid/uid fills
#define MEMORY_INCR 128 // amt by which allocations grow
#define READS_BEGUN (info->read) // a read is in progress
enum pids_item PROCPS_PIDS_logical_end = PROCPS_PIDS_noop + 1;
enum pids_item PROCPS_PIDS_physical_end = PROCPS_PIDS_noop + 2;
// these represent the proc_t fields whose storage cannot be managed
// optimally if they are ever referenced more than once in any stack
enum rel_ref {
ref_CGROUP, ref_CMD, ref_CMDLINE, ref_ENVIRON, ref_SD_MACH,
ref_SD_OUID, ref_SD_SEAT, ref_SD_SESS, ref_SD_SLICE, ref_SD_UNIT,
ref_SD_UUNIT, ref_SUPGIDS, ref_SUPGROUPS,
MAXIMUM_ref
};
struct stacks_extent {
struct pids_stack **stacks;
int ext_numitems; // includes 'physical_end' delimiter
int ext_numstacks;
struct stacks_extent *next;
};
struct fetch_support {
struct pids_stack **anchor; // reapable/fillable (consolidated extents)
int n_alloc; // number of above pointers allocated
int n_inuse; // number of above pointers occupied
int n_alloc_save; // last known summary.stacks allocation
struct pids_reap summary; // counts + stacks for return to caller
};
struct procps_pidsinfo {
int refcount;
int maxitems; // includes 'physical_end' delimiter
int curitems; // includes 'logical_end' delimiter
enum pids_item *items; // includes 'phy/log_end' delimiters
struct stacks_extent *extents; // anchor for all resettable extents
struct stacks_extent *otherexts; // anchor for single stack invariant extents
struct fetch_support reap; // support for procps_pids_reap
struct fetch_support select; // support for procps_pids_select
int history_yes; // need historical data
struct history_info *hist; // pointer to historical support data
int dirty_stacks; // extents need dynamic storage clean
struct stacks_extent *read; // an extent used for active reads
proc_t*(*read_something)(PROCTAB*, proc_t*); // readproc/readeither via which
unsigned pgs2k_shift; // to convert some proc vaules
unsigned flags; // the old library PROC_FILL flagss
PROCTAB *PT; // the old library essential interface
unsigned long hertz; // for TIME_ALL & TIME_ELAPSED calculations
unsigned long long boot_seconds; // for TIME_ELAPSED calculation
int ref_counts[MAXIMUM_ref]; // ref counts for special string fields
};
// ___ Results 'Set' Support ||||||||||||||||||||||||||||||||||||||||||||||||||
#define setNAME(e) set_results_ ## e
#define setDECL(e) static void setNAME(e) \
(struct procps_pidsinfo *I, struct pids_result *R, proc_t *P)
// convert pages to kib
#define CVT_set(e,t,x) setDECL(e) { \
R->result. t = (unsigned long)(P-> x) << I -> pgs2k_shift; }
// strdup of a static char array
#define DUP_set(e,x) setDECL(e) { \
(void)I; R->result.str = strdup(P-> x); }
// regular assignment copy
#define REG_set(e,t,x) setDECL(e) { \
(void)I; R->result. t = P-> x; }
// take ownership of a regular char* string if possible, else duplicate
#define STR_set(e,x) setDECL(e) { \
if (I->ref_counts[ref_ ## e] > 1) R->result.str = strdup(P-> x); \
else { R->result.str = P-> x; P-> x = NULL; } }
// take ownership of a vectorized single string if possible, else duplicate
#define STV_set(e,x) setDECL(e) { \
if (I->ref_counts[ref_ ## e] > 1) R->result.str = strdup(*P-> x); \
else { R->result.str = *P-> x; P-> x = NULL; } }
/*
take ownership of true vectorized strings if possible, else return NULL
[ if there's a source field ref_count, then those true string vectors ]
[ have already been converted into a single string so we return NULL. ]
[ otherwise, the first result struct now gets ownership of those true ]
[ string vectors and any duplicate structures will then receive NULL. ]
*/
#define VEC_set(e1,e2,x) setDECL(e1) { \
if (I->ref_counts[ref_ ## e2]) R->result.strv = NULL; \
else { R->result.strv = P-> x; P-> x = NULL; } }
REG_set(ADDR_END_CODE, ul_int, end_code)
REG_set(ADDR_KSTK_EIP, ul_int, kstk_eip)
REG_set(ADDR_KSTK_ESP, ul_int, kstk_esp)
REG_set(ADDR_START_CODE, ul_int, start_code)
REG_set(ADDR_START_STACK, ul_int, start_stack)
REG_set(ALARM, sl_int, alarm)
setDECL(CGNAME) { char *name = strstr(*P->cgroup, ":name="); if (name && *(name+6)) name += 6; else name = *P->cgroup; R->result.str = strdup(name); }
STV_set(CGROUP, cgroup)
VEC_set(CGROUP_V, CGROUP, cgroup)
STR_set(CMD, cmd)
STV_set(CMDLINE, cmdline)
VEC_set(CMDLINE_V, CMDLINE, cmdline)
STV_set(ENVIRON, environ)
VEC_set(ENVIRON_V, ENVIRON, environ)
REG_set(EXIT_SIGNAL, s_int, exit_signal)
REG_set(FLAGS, ul_int, flags)
REG_set(FLT_MAJ, ul_int, maj_flt)
REG_set(FLT_MAJ_C, ul_int, cmaj_flt)
REG_set(FLT_MAJ_DELTA, ul_int, maj_delta)
REG_set(FLT_MIN, ul_int, min_flt)
REG_set(FLT_MIN_C, ul_int, cmin_flt)
REG_set(FLT_MIN_DELTA, ul_int, min_delta)
REG_set(ID_EGID, u_int, egid)
REG_set(ID_EGROUP, str, egroup)
REG_set(ID_EUID, u_int, euid)
REG_set(ID_EUSER, str, euser)
REG_set(ID_FGID, u_int, fgid)
REG_set(ID_FGROUP, str, fgroup)
REG_set(ID_FUID, u_int, fuid)
REG_set(ID_FUSER, str, fuser)
REG_set(ID_PGRP, s_int, pgrp)
REG_set(ID_PID, s_int, tid)
REG_set(ID_PPID, s_int, ppid)
REG_set(ID_RGID, u_int, rgid)
REG_set(ID_RGROUP, str, rgroup)
REG_set(ID_RUID, u_int, ruid)
REG_set(ID_RUSER, str, ruser)
REG_set(ID_SESSION, s_int, session)
REG_set(ID_SGID, u_int, sgid)
REG_set(ID_SGROUP, str, sgroup)
REG_set(ID_SUID, u_int, suid)
REG_set(ID_SUSER, str, suser)
REG_set(ID_TGID, s_int, tgid)
REG_set(ID_TPGID, s_int, tpgid)
setDECL(LXCNAME) { (void)I; R->result.str = (char *)P->lxcname; }
REG_set(MEM_CODE, sl_int, trs)
CVT_set(MEM_CODE_KIB, ul_int, trs)
REG_set(MEM_DATA, sl_int, drs)
CVT_set(MEM_DATA_KIB, ul_int, drs)
REG_set(MEM_DT, sl_int, dt)
REG_set(MEM_LRS, sl_int, lrs)
REG_set(MEM_RES, sl_int, resident)
CVT_set(MEM_RES_KIB, ul_int, resident)
REG_set(MEM_SHR, sl_int, share)
CVT_set(MEM_SHR_KIB, ul_int, share)
REG_set(MEM_VIRT, sl_int, size)
CVT_set(MEM_VIRT_KIB, ul_int, size)
REG_set(NICE, sl_int, nice)
REG_set(NLWP, s_int, nlwp)
REG_set(NS_IPC, ul_int, ns.ns[0])
REG_set(NS_MNT, ul_int, ns.ns[1])
REG_set(NS_NET, ul_int, ns.ns[2])
REG_set(NS_PID, ul_int, ns.ns[3])
REG_set(NS_USER, ul_int, ns.ns[4])
REG_set(NS_UTS, ul_int, ns.ns[5])
REG_set(OOM_ADJ, s_int, oom_adj)
REG_set(OOM_SCORE, s_int, oom_score)
REG_set(PRIORITY, s_int, priority)
REG_set(PROCESSOR, u_int, processor)
REG_set(RSS, sl_int, rss)
REG_set(RSS_RLIM, ul_int, rss_rlim)
REG_set(RTPRIO, ul_int, rtprio)
REG_set(SCHED_CLASS, ul_int, sched)
STR_set(SD_MACH, sd_mach)
STR_set(SD_OUID, sd_ouid)
STR_set(SD_SEAT, sd_seat)
STR_set(SD_SESS, sd_sess)
STR_set(SD_SLICE, sd_slice)
STR_set(SD_UNIT, sd_unit)
STR_set(SD_UUNIT, sd_uunit)
DUP_set(SIGBLOCKED, blocked)
DUP_set(SIGCATCH, sigcatch)
DUP_set(SIGIGNORE, sigignore)
DUP_set(SIGNALS, signal)
DUP_set(SIGPENDING, _sigpnd)
REG_set(STATE, s_ch, state)
STR_set(SUPGIDS, supgid)
STR_set(SUPGROUPS, supgrp)
setDECL(TICS_ALL) { (void)I; R->result.ull_int = P->utime + P->stime; }
setDECL(TICS_ALL_C) { (void)I; R->result.ull_int = P->utime + P->stime + P->cutime + P->cstime; }
REG_set(TICS_DELTA, u_int, pcpu)
REG_set(TICS_SYSTEM, ull_int, stime)
REG_set(TICS_SYSTEM_C, ull_int, cstime)
REG_set(TICS_USER, ull_int, utime)
REG_set(TICS_USER_C, ull_int, cutime)
setDECL(TIME_ALL) { R->result.ull_int = (P->utime + P->stime) / I->hertz; }
setDECL(TIME_ELAPSED) { R->result.ull_int = (I->boot_seconds >= (P->start_time / I->hertz)) ? I->boot_seconds - (P->start_time / I->hertz) : 0; }
REG_set(TIME_START, ull_int, start_time)
REG_set(TTY, s_int, tty)
setDECL(TTY_NAME) { char buf[64]; (void)I; dev_to_tty(buf, sizeof(buf), P->tty, P->tid, ABBREV_DEV); R->result.str = strdup(buf); }
setDECL(TTY_NUMBER) { char buf[64]; (void)I; dev_to_tty(buf, sizeof(buf), P->tty, P->tid, ABBREV_DEV|ABBREV_TTY|ABBREV_PTS); R->result.str = strdup(buf); }
REG_set(VM_DATA, ul_int, vm_data)
REG_set(VM_EXE, ul_int, vm_exe)
REG_set(VM_LIB, ul_int, vm_lib)
REG_set(VM_LOCK, ul_int, vm_lock)
REG_set(VM_RSS, ul_int, vm_rss)
REG_set(VM_SIZE, ul_int, vm_size)
REG_set(VM_STACK, ul_int, vm_stack)
REG_set(VM_SWAP, ul_int, vm_swap)
setDECL(VM_USED) { (void)I; R->result.ul_int = P->vm_swap + P->vm_rss; }
REG_set(VSIZE_PGS, ul_int, vsize)
REG_set(WCHAN_ADDR, ul_int, wchan)
setDECL(WCHAN_NAME) { (void)I; R->result.str = strdup(lookup_wchan(P->tid)); }
setDECL(extra) { (void)I; (void)R; (void)P; return; }
setDECL(noop) { (void)I; (void)R; (void)P; return; }
setDECL(logical_end) { (void)I; (void)R; (void)P; return; }
setDECL(physical_end) { (void)I; (void)R; (void)P; return; }
#undef setDECL
#undef CVT_set
#undef DUP_set
#undef REG_set
#undef STR_set
#undef STV_set
#undef VEC_set
// ___ Free Storage Support |||||||||||||||||||||||||||||||||||||||||||||||||||
#define freNAME(e) free_results_ ## e
static void freNAME(str) (struct pids_result *R) {
if (R->result.str) free(R->result.str);
}
static void freNAME(strv) (struct pids_result *R) {
if (R->result.strv && *R->result.strv) free(*R->result.strv);
}
// ___ Sorting Support ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
struct sort_parms {
int offset;
enum pids_sort_order order;
};
#define srtNAME(e) sort_results_ ## e
#define NUM_srt(T) static int srtNAME(T) ( \
const struct pids_stack **A, const struct pids_stack **B, struct sort_parms *P) { \
const struct pids_result *a = (*A)->head + P->offset; \
const struct pids_result *b = (*B)->head + P->offset; \
return P->order * (a->result. T - b->result. T); }
#define REG_srt(T) static int srtNAME(T) ( \
const struct pids_stack **A, const struct pids_stack **B, struct sort_parms *P) { \
const struct pids_result *a = (*A)->head + P->offset; \
const struct pids_result *b = (*B)->head + P->offset; \
if ( a->result. T > b->result. T ) return P->order > 0 ? 1 : -1; \
if ( a->result. T < b->result. T ) return P->order > 0 ? -1 : 1; \
return 0; }
NUM_srt(s_ch)
NUM_srt(s_int)
NUM_srt(sl_int)
REG_srt(u_int)
REG_srt(ul_int)
REG_srt(ull_int)
static int srtNAME(str) (
const struct pids_stack **A, const struct pids_stack **B, struct sort_parms *P) {
const struct pids_result *a = (*A)->head + P->offset;
const struct pids_result *b = (*B)->head + P->offset;
return P->order * strcoll(a->result.str, b->result.str);
}
static int srtNAME(strv) (
const struct pids_stack **A, const struct pids_stack **B, struct sort_parms *P) {
const struct pids_result *a = (*A)->head + P->offset;
const struct pids_result *b = (*B)->head + P->offset;
if (!a->result.strv || !b->result.strv) return 0;
return P->order * strcoll((*a->result.strv), (*b->result.strv));
}
static int srtNAME(strvers) (
const struct pids_stack **A, const struct pids_stack **B, struct sort_parms *P) {
const struct pids_result *a = (*A)->head + P->offset;
const struct pids_result *b = (*B)->head + P->offset;
return P->order * strverscmp(a->result.str, b->result.str);
}
static int srtNAME(noop) (
const struct pids_stack **A, const struct pids_stack **B, enum pids_item *O) {
(void)A; (void)B; (void)O;
return 0;
}
#undef NUM_srt
#undef REG_srt
// ___ Controlling Table ||||||||||||||||||||||||||||||||||||||||||||||||||||||
// from either 'stat' or 'status' (preferred)
#define f_either PROC_SPARE_1
#define f_grp PROC_FILLGRP
#define f_lxc PROC_FILL_LXC
#define f_ns PROC_FILLNS
#define f_oom PROC_FILLOOM
#define f_stat PROC_FILLSTAT
#define f_statm PROC_FILLMEM
#define f_status PROC_FILLSTATUS
#define f_systemd PROC_FILLSYSTEMD
#define f_usr PROC_FILLUSR
// these next three will yield true verctorized strings
#define v_arg PROC_FILLARG
#define v_cgroup PROC_FILLCGROUP
#define v_env PROC_FILLENV
// remaining are compound flags, yielding a single string (maybe vectorized)
#define x_cgroup PROC_EDITCGRPCVT | PROC_FILLCGROUP // just 1 str
#define x_cmdline PROC_EDITCMDLCVT | PROC_FILLARG // just 1 str
#define x_environ PROC_EDITENVRCVT | PROC_FILLENV // just 1 str
#define x_ogroup PROC_FILLSTATUS | PROC_FILLGRP
#define x_ouser PROC_FILLSTATUS | PROC_FILLUSR
#define x_supgrp PROC_FILLSTATUS | PROC_FILLSUPGRP
typedef void (*SET_t)(struct procps_pidsinfo *, struct pids_result *, proc_t *);
typedef void (*FRE_t)(struct pids_result *);
typedef int (*QSR_t)(const void *, const void *, void *);
#define RS(e) (SET_t)setNAME(e)
#define FF(e) (FRE_t)freNAME(e)
#define QS(t) (QSR_t)srtNAME(t)
/*
* Need it be said?
* This table must be kept in the exact same order as
* those 'enum pids_item' guys ! */
static struct {
SET_t setsfunc; // the actual result setting routine
unsigned oldflags; // PROC_FILLxxxx flags for this item
FRE_t freefunc; // free function for strings storage
QSR_t sortfunc; // sort cmp func for a specific type
int needhist; // a result requires history support
int refcount; // the result needs reference counts
} Item_table[] = {
/* setsfunc oldflags freefunc sortfunc needhist refcount
--------------------- ---------- --------- ------------ -------- ------------- */
{ RS(ADDR_END_CODE), f_stat, NULL, QS(ul_int), 0, -1 },
{ RS(ADDR_KSTK_EIP), f_stat, NULL, QS(ul_int), 0, -1 },
{ RS(ADDR_KSTK_ESP), f_stat, NULL, QS(ul_int), 0, -1 },
{ RS(ADDR_START_CODE), f_stat, NULL, QS(ul_int), 0, -1 },
{ RS(ADDR_START_STACK), f_stat, NULL, QS(ul_int), 0, -1 },
{ RS(ALARM), f_stat, NULL, QS(sl_int), 0, -1 },
{ RS(CGNAME), x_cgroup, FF(str), QS(str), 0, ref_CGROUP }, // refcount: diff result, same source
{ RS(CGROUP), x_cgroup, FF(str), QS(str), 0, ref_CGROUP }, // refcount: diff result, same source
{ RS(CGROUP_V), v_cgroup, FF(strv), QS(strv), 0, -1 },
{ RS(CMD), f_either, FF(str), QS(str), 0, ref_CMD },
{ RS(CMDLINE), x_cmdline, FF(str), QS(str), 0, ref_CMDLINE },
{ RS(CMDLINE_V), v_arg, FF(strv), QS(strv), 0, -1 },
{ RS(ENVIRON), x_environ, FF(str), QS(str), 0, ref_ENVIRON },
{ RS(ENVIRON_V), v_env, FF(strv), QS(strv), 0, -1 },
{ RS(EXIT_SIGNAL), f_stat, NULL, QS(s_int), 0, -1 },
{ RS(FLAGS), f_stat, NULL, QS(ul_int), 0, -1 },
{ RS(FLT_MAJ), f_stat, NULL, QS(ul_int), 0, -1 },
{ RS(FLT_MAJ_C), f_stat, NULL, QS(ul_int), 0, -1 },
{ RS(FLT_MAJ_DELTA), f_stat, NULL, QS(ul_int), +1, -1 },
{ RS(FLT_MIN), f_stat, NULL, QS(ul_int), 0, -1 },
{ RS(FLT_MIN_C), f_stat, NULL, QS(ul_int), 0, -1 },
{ RS(FLT_MIN_DELTA), f_stat, NULL, QS(ul_int), +1, -1 },
{ RS(ID_EGID), 0, NULL, QS(u_int), 0, -1 }, // oldflags: free w/ simple_read...
{ RS(ID_EGROUP), f_grp, NULL, QS(str), 0, -1 },
{ RS(ID_EUID), 0, NULL, QS(u_int), 0, -1 }, // oldflags: free w/ simple_read...
{ RS(ID_EUSER), f_usr, NULL, QS(str), 0, -1 },
{ RS(ID_FGID), f_status, NULL, QS(u_int), 0, -1 },
{ RS(ID_FGROUP), x_ogroup, NULL, QS(str), 0, -1 },
{ RS(ID_FUID), f_status, NULL, QS(u_int), 0, -1 },
{ RS(ID_FUSER), x_ouser, NULL, QS(str), 0, -1 },
{ RS(ID_PGRP), f_stat, NULL, QS(s_int), 0, -1 },
{ RS(ID_PID), 0, NULL, QS(s_int), 0, -1 }, // oldflags: free w/ simple_nextpid
{ RS(ID_PPID), f_either, NULL, QS(s_int), 0, -1 },
{ RS(ID_RGID), f_status, NULL, QS(u_int), 0, -1 },
{ RS(ID_RGROUP), x_ogroup, NULL, QS(str), 0, -1 },
{ RS(ID_RUID), f_status, NULL, QS(u_int), 0, -1 },
{ RS(ID_RUSER), x_ouser, NULL, QS(str), 0, -1 },
{ RS(ID_SESSION), f_stat, NULL, QS(s_int), 0, -1 },
{ RS(ID_SGID), f_status, NULL, QS(u_int), 0, -1 },
{ RS(ID_SGROUP), x_ogroup, NULL, QS(str), 0, -1 },
{ RS(ID_SUID), f_status, NULL, QS(u_int), 0, -1 },
{ RS(ID_SUSER), x_ouser, NULL, QS(str), 0, -1 },
{ RS(ID_TGID), 0, NULL, QS(s_int), 0, -1 }, // oldflags: free w/ simple_nextpid
{ RS(ID_TPGID), f_stat, NULL, QS(s_int), 0, -1 },
{ RS(LXCNAME), f_lxc, NULL, QS(str), 0, -1 },
{ RS(MEM_CODE), f_statm, NULL, QS(sl_int), 0, -1 },
{ RS(MEM_CODE_KIB), f_statm, NULL, QS(ul_int), 0, -1 },
{ RS(MEM_DATA), f_statm, NULL, QS(sl_int), 0, -1 },
{ RS(MEM_DATA_KIB), f_statm, NULL, QS(ul_int), 0, -1 },
{ RS(MEM_DT), f_statm, NULL, QS(sl_int), 0, -1 },
{ RS(MEM_LRS), f_statm, NULL, QS(sl_int), 0, -1 },
{ RS(MEM_RES), f_statm, NULL, QS(sl_int), 0, -1 },
{ RS(MEM_RES_KIB), f_statm, NULL, QS(ul_int), 0, -1 },
{ RS(MEM_SHR), f_statm, NULL, QS(sl_int), 0, -1 },
{ RS(MEM_SHR_KIB), f_statm, NULL, QS(ul_int), 0, -1 },
{ RS(MEM_VIRT), f_statm, NULL, QS(sl_int), 0, -1 },
{ RS(MEM_VIRT_KIB), f_statm, NULL, QS(ul_int), 0, -1 },
{ RS(NICE), f_stat, NULL, QS(sl_int), 0, -1 },
{ RS(NLWP), f_either, NULL, QS(s_int), 0, -1 },
{ RS(NS_IPC), f_ns, NULL, QS(ul_int), 0, -1 },
{ RS(NS_MNT), f_ns, NULL, QS(ul_int), 0, -1 },
{ RS(NS_NET), f_ns, NULL, QS(ul_int), 0, -1 },
{ RS(NS_PID), f_ns, NULL, QS(ul_int), 0, -1 },
{ RS(NS_USER), f_ns, NULL, QS(ul_int), 0, -1 },
{ RS(NS_UTS), f_ns, NULL, QS(ul_int), 0, -1 },
{ RS(OOM_ADJ), f_oom, NULL, QS(s_int), 0, -1 },
{ RS(OOM_SCORE), f_oom, NULL, QS(s_int), 0, -1 },
{ RS(PRIORITY), f_stat, NULL, QS(s_int), 0, -1 },
{ RS(PROCESSOR), f_stat, NULL, QS(u_int), 0, -1 },
{ RS(RSS), f_stat, NULL, QS(sl_int), 0, -1 },
{ RS(RSS_RLIM), f_stat, NULL, QS(ul_int), 0, -1 },
{ RS(RTPRIO), f_stat, NULL, QS(ul_int), 0, -1 },
{ RS(SCHED_CLASS), f_stat, NULL, QS(ul_int), 0, -1 },
{ RS(SD_MACH), f_systemd, FF(str), QS(str), 0, ref_SD_MACH },
{ RS(SD_OUID), f_systemd, FF(str), QS(str), 0, ref_SD_OUID },
{ RS(SD_SEAT), f_systemd, FF(str), QS(str), 0, ref_SD_SEAT },
{ RS(SD_SESS), f_systemd, FF(str), QS(str), 0, ref_SD_SESS },
{ RS(SD_SLICE), f_systemd, FF(str), QS(str), 0, ref_SD_SLICE },
{ RS(SD_UNIT), f_systemd, FF(str), QS(str), 0, ref_SD_UNIT },
{ RS(SD_UUNIT), f_systemd, FF(str), QS(str), 0, ref_SD_UUNIT },
{ RS(SIGBLOCKED), f_status, FF(str), QS(str), 0, -1 },
{ RS(SIGCATCH), f_status, FF(str), QS(str), 0, -1 },
{ RS(SIGIGNORE), f_status, FF(str), QS(str), 0, -1 },
{ RS(SIGNALS), f_status, FF(str), QS(str), 0, -1 },
{ RS(SIGPENDING), f_status, FF(str), QS(str), 0, -1 },
{ RS(STATE), f_either, NULL, QS(s_ch), 0, -1 },
{ RS(SUPGIDS), f_status, FF(str), QS(str), 0, ref_SUPGIDS },
{ RS(SUPGROUPS), x_supgrp, FF(str), QS(str), 0, ref_SUPGROUPS },
{ RS(TICS_ALL), f_stat, NULL, QS(ull_int), 0, -1 },
{ RS(TICS_ALL_C), f_stat, NULL, QS(ull_int), 0, -1 },
{ RS(TICS_DELTA), f_stat, NULL, QS(u_int), +1, -1 },
{ RS(TICS_SYSTEM), f_stat, NULL, QS(ull_int), 0, -1 },
{ RS(TICS_SYSTEM_C), f_stat, NULL, QS(ull_int), 0, -1 },
{ RS(TICS_USER), f_stat, NULL, QS(ull_int), 0, -1 },
{ RS(TICS_USER_C), f_stat, NULL, QS(ull_int), 0, -1 },
{ RS(TIME_ALL), f_stat, NULL, QS(ull_int), 0, -1 },
{ RS(TIME_ELAPSED), f_stat, NULL, QS(ull_int), 0, -1 },
{ RS(TIME_START), f_stat, NULL, QS(ull_int), 0, -1 },
{ RS(TTY), f_stat, NULL, QS(s_int), 0, -1 },
{ RS(TTY_NAME), f_stat, FF(str), QS(strvers), 0, -1 },
{ RS(TTY_NUMBER), f_stat, FF(str), QS(strvers), 0, -1 },
{ RS(VM_DATA), f_status, NULL, QS(ul_int), 0, -1 },
{ RS(VM_EXE), f_status, NULL, QS(ul_int), 0, -1 },
{ RS(VM_LIB), f_status, NULL, QS(ul_int), 0, -1 },
{ RS(VM_LOCK), f_status, NULL, QS(ul_int), 0, -1 },
{ RS(VM_RSS), f_status, NULL, QS(ul_int), 0, -1 },
{ RS(VM_SIZE), f_status, NULL, QS(ul_int), 0, -1 },
{ RS(VM_STACK), f_status, NULL, QS(ul_int), 0, -1 },
{ RS(VM_SWAP), f_status, NULL, QS(ul_int), 0, -1 },
{ RS(VM_USED), f_status, NULL, QS(ul_int), 0, -1 },
{ RS(VSIZE_PGS), f_stat, NULL, QS(ul_int), 0, -1 },
{ RS(WCHAN_ADDR), f_stat, NULL, QS(ul_int), 0, -1 },
{ RS(WCHAN_NAME), 0, FF(str), QS(str), 0, -1 }, // oldflags: tid already free
{ RS(extra), 0, NULL, QS(ull_int), 0, -1 },
{ RS(noop), 0, NULL, QS(noop), 0, -1 },
{ RS(logical_end), 0, NULL, QS(noop), 0, -1 },
{ RS(physical_end), 0, NULL, QS(noop), 0, -1 }
};
#undef RS
#undef FF
#undef QS
#undef setNAME
#undef freNAME
#undef srtNAME
//#undef f_either // needed later
#undef f_grp
#undef f_lxc
#undef f_ns
#undef f_oom
//#undef f_stat // needed later
#undef f_statm
//#undef f_status // needed later
#undef f_systemd
#undef f_usr
#undef v_arg
#undef v_cgroup
#undef v_env
#undef x_cgroup
#undef x_cmdline
#undef x_environ
#undef x_ogroup
#undef x_ouser
#undef x_supgrp
// ___ History Support Private Functions ||||||||||||||||||||||||||||||||||||||
// ( stolen from top when he wasn't looking ) -------------------------------
#define HHASH_SIZE 1024
#define _HASH_PID_(K) (K & (HHASH_SIZE - 1))
#define Hr(x) info->hist->x // 'hist ref', minimize stolen impact
typedef unsigned long long TIC_t;
typedef struct HST_t {
TIC_t tics; // last frame's tics count
unsigned long maj, min; // last frame's maj/min_flt counts
int pid; // record 'key'
int lnk; // next on hash chain
} HST_t;
struct history_info {
int num_tasks; // used as index (tasks tallied)
int HHist_siz; // max number of HST_t structs
HST_t *PHist_sav; // alternating 'old/new' HST_t anchors
HST_t *PHist_new;
int HHash_one [HHASH_SIZE]; // the actual hash tables
int HHash_two [HHASH_SIZE]; // (accessed via PHash_sav/PHash_new)
int HHash_nul [HHASH_SIZE]; // an 'empty' hash table image
int *PHash_sav; // alternating 'old/new' hash tables
int *PHash_new; // (aka. the 'one/two' actual tables)
};
static void config_history (
struct procps_pidsinfo *info)
{
int i;
for (i = 0; i < HHASH_SIZE; i++) // make the 'empty' table image
Hr(HHash_nul[i]) = -1;
memcpy(Hr(HHash_one), Hr(HHash_nul), sizeof(Hr(HHash_nul)));
memcpy(Hr(HHash_two), Hr(HHash_nul), sizeof(Hr(HHash_nul)));
Hr(PHash_sav) = Hr(HHash_one); // alternating 'old/new' hash tables
Hr(PHash_new) = Hr(HHash_two);
} // end: config_history
static inline HST_t *histget (
struct procps_pidsinfo *info,
int pid)
{
int V = Hr(PHash_sav[_HASH_PID_(pid)]);
while (-1 < V) {
if (Hr(PHist_sav[V].pid) == pid)
return &Hr(PHist_sav[V]);
V = Hr(PHist_sav[V].lnk); }
return NULL;
} // end: histget
static inline void histput (
struct procps_pidsinfo *info,
unsigned this)
{
int V = _HASH_PID_(Hr(PHist_new[this].pid));
Hr(PHist_new[this].lnk) = Hr(PHash_new[V]);
Hr(PHash_new[V] = this);
} // end: histput
#undef _HASH_PID_
static int make_hist (
struct procps_pidsinfo *info,
proc_t *p)
{
#define nSLOT info->hist->num_tasks
TIC_t tics;
HST_t *h;
if (nSLOT + 1 >= Hr(HHist_siz)) {
Hr(HHist_siz) += MEMORY_INCR;
Hr(PHist_sav) = realloc(Hr(PHist_sav), sizeof(HST_t) * Hr(HHist_siz));
Hr(PHist_new) = realloc(Hr(PHist_new), sizeof(HST_t) * Hr(HHist_siz));
if (!Hr(PHist_sav) || !Hr(PHist_new))
return -ENOMEM;
}
Hr(PHist_new[nSLOT].pid) = p->tid;
Hr(PHist_new[nSLOT].tics) = tics = (p->utime + p->stime);
Hr(PHist_new[nSLOT].maj) = p->maj_flt;
Hr(PHist_new[nSLOT].min) = p->min_flt;
histput(info, nSLOT);
if ((h = histget(info, p->tid))) {
tics -= h->tics;
p->pcpu = tics;
p->maj_delta = p->maj_flt - h->maj;
p->min_delta = p->min_flt - h->min;
}
nSLOT++;
return 0;
#undef nSLOT
} // end: make_hist
static inline void toggle_history (
struct procps_pidsinfo *info)
{
void *v;
v = Hr(PHist_sav);
Hr(PHist_sav) = Hr(PHist_new);
Hr(PHist_new) = v;
v = Hr(PHash_sav);
Hr(PHash_sav) = Hr(PHash_new);
Hr(PHash_new) = v;
memcpy(Hr(PHash_new), Hr(HHash_nul), sizeof(Hr(HHash_nul)));
info->hist->num_tasks = 0;
} // end: toggle_history
#ifdef UNREF_RPTHASH
static void unref_rpthash (
struct procps_pidsinfo *info)
{
int i, j, pop, total_occupied, maxdepth, maxdepth_sav, numdepth
, cross_foot, sz = HHASH_SIZE * (int)sizeof(int)
, hsz = (int)sizeof(HST_t) * Hr(HHist_siz);
int depths[HHASH_SIZE];
for (i = 0, total_occupied = 0, maxdepth = 0; i < HHASH_SIZE; i++) {
int V = Hr(PHash_new[i]);
j = 0;
if (-1 < V) {
++total_occupied;
while (-1 < V) {
V = Hr(PHist_new[V].lnk);
if (-1 < V) j++;
}
}
depths[i] = j;
if (maxdepth < j) maxdepth = j;
}
maxdepth_sav = maxdepth;
fprintf(stderr,
"\n History Memory Costs:"
"\n\tHST_t size = %d, total allocated = %d,"
"\n\tthus PHist_new & PHist_sav consumed %dk (%d) total bytes."
"\n"
"\n\tTwo hash tables provide for %d entries each + 1 extra 'empty' image,"
"\n\tthus %dk (%d) bytes per table for %dk (%d) total bytes."
"\n"
"\n\tGrand total = %dk (%d) bytes."
"\n"
"\n Hash Results Report:"
"\n\tTotal hashed = %d"
"\n\tLevel-0 hash entries = %d (%d%% occupied)"
"\n\tMax Depth = %d"
"\n\n"
, (int)sizeof(HST_t), Hr(HHist_siz)
, hsz / 1024, hsz
, HHASH_SIZE
, sz / 1024, sz, (sz * 3) / 1024, sz * 3
, (hsz + (sz * 3)) / 1024, hsz + (sz * 3)
, info->hist->num_tasks
, total_occupied, (total_occupied * 100) / HHASH_SIZE
, maxdepth);
if (total_occupied) {
for (pop = total_occupied, cross_foot = 0; maxdepth; maxdepth--) {
for (i = 0, numdepth = 0; i < HHASH_SIZE; i++)
if (depths[i] == maxdepth) ++numdepth;
fprintf(stderr,
"\t %5d (%3d%%) hash table entries at depth %d\n"
, numdepth, (numdepth * 100) / total_occupied, maxdepth);
pop -= numdepth;
cross_foot += numdepth;
if (0 == pop && cross_foot == total_occupied) break;
}
if (pop) {
fprintf(stderr, "\t %5d (%3d%%) unchained entries (at depth 0)\n"
, pop, (pop * 100) / total_occupied);
cross_foot += pop;
}
fprintf(stderr,
"\t -----\n"
"\t %5d total entries occupied\n", cross_foot);
if (maxdepth_sav > 1) {
fprintf(stderr, "\n PIDs at max depth: ");
for (i = 0; i < HHASH_SIZE; i++)
if (depths[i] == maxdepth_sav) {
j = Hr(PHash_new[i]);
fprintf(stderr, "\n\tpos %4d: %05d", i, Hr(PHist_new[j].pid));
while (-1 < j) {
j = Hr(PHist_new[j].lnk);
if (-1 < j) fprintf(stderr, ", %05d", Hr(PHist_new[j].pid));
}
}
fprintf(stderr, "\n");
}
}
} // end: unref_rpthash
#endif // UNREF_RPTHASH
#undef Hr
#undef HHASH_SIZE
// ___ Standard Private Functions |||||||||||||||||||||||||||||||||||||||||||||
static inline void assign_results (
struct procps_pidsinfo *info,
struct pids_stack *stack,
proc_t *p)
{
struct pids_result *this = stack->head;
for (;;) {
enum pids_item item = this->item;
if (item >= PROCPS_PIDS_logical_end)
break;
Item_table[item].setsfunc(info, this, p);
info->dirty_stacks |= Item_table[item].freefunc ? 1 : 0;
++this;
}
return;
} // end: assign_results
static inline void cleanup_stack (
struct pids_result *p,
int depth)
{
int i;
for (i = 0; i < depth; i++) {
if (p->item < PROCPS_PIDS_noop) {
if (Item_table[p->item].freefunc)
Item_table[p->item].freefunc(p);
p->result.ull_int = 0;
}
++p;
}
} // end: cleanup_stack
static inline void cleanup_stacks_all (
struct procps_pidsinfo *info)
{
struct stacks_extent *ext = info->extents;
int i;
while (ext) {
for (i = 0; ext->stacks[i]; i++)
cleanup_stack(ext->stacks[i]->head, info->maxitems);
ext = ext->next;
};
info->dirty_stacks = 0;
} // end: cleanup_stacks_all
/*
* This routine exists in case we ever want to offer something like
* 'static' or 'invarient' results stacks. By unsplicing an extent
* from the info anchor it will be isolated from future reset/free. */
static struct stacks_extent *extent_cut (
struct procps_pidsinfo *info,
struct stacks_extent *ext)
{
struct stacks_extent *p = info->extents;
if (ext) {
if (ext == p) {
info->extents = p->next;
return ext;
}
do {
if (ext == p->next) {
p->next = p->next->next;
return ext;
}
p = p->next;
} while (p);
}
return NULL;
} // end: extent_cut
static int extent_free (
struct procps_pidsinfo *info,
struct stacks_extent *ext)
{
if (extent_cut(info, ext)) {
free(ext);
return 0;
}
return -1;
} // end: extent_free
static inline int items_check_failed (
int maxitems,
enum pids_item *items)
{
int i;
/* if an enum is passed instead of an address of one or more enums, ol' gcc
* will silently convert it to an address (possibly NULL). only clang will
* offer any sort of warning like the following:
*
* warning: incompatible integer to pointer conversion passing 'int' to parameter of type 'enum pids_item *'
* if (procps_pids_new(&info, 3, PROCPS_PIDS_noop) < 0)
* ^~~~~~~~~~~~~~~~
*/
if (maxitems < 1
|| (void *)items < (void *)0x8000) // twice as big as our largest enum
return -1;
for (i = 0; i < maxitems; i++) {
// a pids_item is currently unsigned, but we'll protect our future
if (items[i] < 0)
return -1;
if (items[i] > PROCPS_PIDS_noop) {
return -1;
}
}
return 0;
} // end: items_check_failed
static inline void libflags_set (
struct procps_pidsinfo *info)
{
int i, n;
memset (info->ref_counts, 0, sizeof(info->ref_counts));
info->flags = info->history_yes = 0;
for (i = 0; i < info->curitems; i++) {
info->flags |= Item_table[info->items[i]].oldflags;
info->history_yes |= Item_table[info->items[i]].needhist;
n = Item_table[info->items[i]].refcount;
if (n > -1) ++info->ref_counts[n];
}
if (info->flags & f_either) {
if (!(info->flags & f_stat))
info->flags |= f_status;
}
return;
} // end: libflags_set
static inline void oldproc_close (
struct procps_pidsinfo *info)
{
if (info->PT != NULL) {
closeproc(info->PT);
info->PT = NULL;
}
return;
} // end: oldproc_close
static inline int oldproc_open (
struct procps_pidsinfo *info,
unsigned supp_flgs,
...)
{
va_list vl;
int *ids;
int num = 0;
if (info->PT == NULL) {
va_start(vl, supp_flgs);
ids = va_arg(vl, int*);
if (info->flags | PROC_UID) num = va_arg(vl, int);
va_end(vl);
if (NULL == (info->PT = openproc(info->flags | supp_flgs, ids, num)))
return 0;
}
return 1;
} // end: oldproc_open
static inline struct pids_result *stack_itemize (
struct pids_result *p,
int depth,
enum pids_item *items)
{
struct pids_result *p_sav = p;
int i;
for (i = 0; i < depth; i++) {
p->item = items[i];
p->result.ull_int = 0;
++p;
}
return p_sav;
} // end: stack_itemize
static inline int tally_proc (
struct procps_pidsinfo *info,
struct pids_counts *counts,
proc_t *p)
{
switch (p->state) {
case 'R':
++counts->running;
break;
case 'S':
case 'D':
++counts->sleeping;
break;
case 'T':
++counts->stopped;
break;
case 'Z':
++counts->zombied;
break;
default: // keep gcc happy
break;
}
++counts->total;
if (info->history_yes)
return !make_hist(info, p);
return 1;
} // end: tally_proc
#ifdef FPRINT_STACKS
static void validate_stacks (
void *stacks,
const char *who)
{
#include <stdio.h>
static int once = 0;
struct stacks_extent *ext = stacks;
int i, t, x, n = 0;
fprintf(stderr, " %s: called by '%s'\n", __func__, who);
fprintf(stderr, " %s: ext_numitems = %d, ext_numstacks = %d, extents = %p, next = %p\n", __func__, ext->ext_numitems, ext->ext_numstacks, ext, ext->next);
fprintf(stderr, " %s: stacks_extent results excluding the end-of-stack element ...\n", __func__);
for (x = 0; NULL != ext->stacks[x]; x++) {
struct pids_stack *h = ext->stacks[x];
struct pids_result *r = h->head;
fprintf(stderr, " %s: v[%03d] = %p, h = %p", __func__, x, h, r);
for (i = 0; r->item < PROCPS_PIDS_logical_end; i++, r++)
;
t = i + 1;
fprintf(stderr, " - found %d elements for stack %d\n", i, n);
++n;
}
if (!once) {
fprintf(stderr, " %s: found %d total stack(s), each %d bytes (including eos)\n", __func__, x, (int)(sizeof(struct pids_stack) + (sizeof(struct pids_result) * t)));
fprintf(stderr, " %s: sizeof(struct pids_stack) = %d\n", __func__, (int)sizeof(struct pids_stack));
fprintf(stderr, " %s: sizeof(struct pids_result) = %d\n", __func__, (int)sizeof(struct pids_result));
fprintf(stderr, " %s: sizeof(struct stacks_extent) = %d\n", __func__, (int)sizeof(struct stacks_extent));
once = 1;
}
fputc('\n', stderr);
return;
} // end: validate_stacks
#endif
// ___ Special Temporary Section |||||||||||||||||||||||||||||||||||||||||||||
// [ contains former public functions and other dependent routine(s) while we ]
// [ resist using forward declarations yet still maintain an alphabetic order ]
/*
* alloc_stacks():
*
* Allocate and initialize one or more stacks each of which is anchored in an
* associated pids_stack structure (which may include extra user space).
*
* All such stacks will will have their result structures properly primed with
* 'items', while the result itself will be zeroed.
*
* Returns an array of pointers representing the 'heads' of each new stack.
*/
static struct stacks_extent *alloc_stacks (
struct procps_pidsinfo *info,
int maxstacks)
{
struct stacks_extent *p_blob;
struct pids_stack **p_vect;
struct pids_stack *p_head;
size_t vect_size, head_size, list_size, blob_size;
void *v_head, *v_list;
int i;
if (info == NULL || info->items == NULL)
return NULL;
if (maxstacks < 1)
return NULL;
vect_size = sizeof(void *) * maxstacks; // address vectors themselves
vect_size += sizeof(void *); // plus NULL delimiter
head_size = sizeof(struct pids_stack); // a head struct
list_size = sizeof(struct pids_result) * info->maxitems; // a results stack
blob_size = sizeof(struct stacks_extent); // the extent anchor itself
blob_size += vect_size; // all vectors + delim
blob_size += head_size * maxstacks; // all head structs
blob_size += list_size * maxstacks; // all results stacks
/* note: all memory is allocated in a single blob, facilitating a later free().
as a minimum, it's important that the result structures themselves always be
contiguous for any given stack (just as they are when defined statically). */
if (NULL == (p_blob = calloc(1, blob_size)))
return NULL;
p_blob->next = info->extents;
info->extents = p_blob;
p_blob->stacks = (void *)p_blob + sizeof(struct stacks_extent);
p_vect = p_blob->stacks;
v_head = (void *)p_vect + vect_size;
v_list = v_head + (head_size * maxstacks);
for (i = 0; i < maxstacks; i++) {
p_head = (struct pids_stack *)v_head;
p_head->head = stack_itemize((struct pids_result *)v_list, info->curitems, info->items);
p_blob->stacks[i] = p_head;
v_list += list_size;
v_head += head_size;
}
p_blob->ext_numitems = info->maxitems;
p_blob->ext_numstacks = maxstacks;
#ifdef FPRINT_STACKS
validate_stacks(p_blob, __func__);
#endif
return p_blob;
} // end: alloc_stacks
static int dealloc_stacks (
struct procps_pidsinfo *info,
struct stacks_extent **these)
{
struct stacks_extent *ext;
int rc;
if (info == NULL || these == NULL)
return -EINVAL;
if ((*these)->stacks == NULL || (*these)->stacks[0] == NULL)
return -EINVAL;
ext = *these;
rc = extent_free(info, ext);
*these = NULL;
return rc;
} // end: dealloc_stacks
static int fetch_helper (
struct procps_pidsinfo *info,
struct fetch_support *this)
{
#define n_alloc this->n_alloc
#define n_inuse this->n_inuse
static proc_t task; // static for initial zeroes + later dynamic free(s)
struct stacks_extent *ext;
if (info == NULL || this == NULL)
return -1;
// initialize stuff -----------------------------------
if (!this->anchor) {
if ((!(this->anchor = calloc(sizeof(void *), MEMORY_INCR)))
|| (!(this->summary.stacks = calloc(sizeof(void *), MEMORY_INCR)))
|| (!(ext = alloc_stacks(info, MEMORY_INCR))))
return -1;
memcpy(this->anchor, ext->stacks, sizeof(void *) * MEMORY_INCR);
n_alloc = MEMORY_INCR;
}
if (info->dirty_stacks)
cleanup_stacks_all(info);
toggle_history(info);
memset(&this->summary.counts, 0, sizeof(struct pids_counts));
// iterate stuff --------------------------------------
n_inuse = 0;
while (info->read_something(info->PT, &task)) {
if (!(n_inuse < n_alloc)) {
n_alloc += MEMORY_INCR;
if ((!(this->anchor = realloc(this->anchor, sizeof(void *) * n_alloc)))
|| (!(ext = alloc_stacks(info, MEMORY_INCR))))
return -1;
memcpy(this->anchor + n_inuse, ext->stacks, sizeof(void *) * MEMORY_INCR);
}
if (!tally_proc(info, &this->summary.counts, &task))
return -1;
assign_results(info, this->anchor[n_inuse++], &task);
}
// finalize stuff -------------------------------------
if (this->n_alloc_save != n_alloc
&& !(this->summary.stacks = realloc(this->summary.stacks, sizeof(void *) * n_alloc)))
return -1;
memcpy(this->summary.stacks, this->anchor, sizeof(void *) * n_alloc);
this->n_alloc_save = n_alloc;
return n_inuse; // callers beware, this might be zero !
#undef n_alloc
#undef n_inuse
} // end: fetch_helper
// ___ Public Functions |||||||||||||||||||||||||||||||||||||||||||||||||||||||
PROCPS_EXPORT struct pids_stack *fatal_proc_unmounted (
struct procps_pidsinfo *info,
int return_self)
{
static proc_t self;
struct stacks_extent *ext;
// this is very likely the *only* newlib function where the
// context (procps_pidsinfo) of NULL will ever be permitted
look_up_our_self(&self);
if (!return_self)
return NULL;
if (info == NULL
|| !(ext = alloc_stacks(info, 1))
|| !extent_cut(info, ext))
return NULL;
ext->next = info->otherexts;
info->otherexts = ext;
assign_results(info, ext->stacks[0], &self);
return ext->stacks[0];
} // end: fatal_proc_unmounted
/*
* procps_pids_new():
*
* @info: location of returned new structure
*
* Returns: 0 on success <0 on failure
*/
PROCPS_EXPORT int procps_pids_new (
struct procps_pidsinfo **info,
int maxitems,
enum pids_item *items)
{
struct procps_pidsinfo *p;
double uptime_secs;
int pgsz;
if (info == NULL || *info != NULL)
return -EINVAL;
if (items_check_failed(maxitems, items))
return -EINVAL;
if (!(p = calloc(1, sizeof(struct procps_pidsinfo))))
return -ENOMEM;
// allow for our PROCPS_PIDS_physical_end
if (!(p->items = calloc((maxitems + 1), sizeof(enum pids_item)))) {
free(p);
return -ENOMEM;
}
if (!(p->hist = calloc((maxitems + 1), sizeof(struct history_info)))) {
free(p->items);
free(p);
return -ENOMEM;
}
memcpy(p->items, items, sizeof(enum pids_item) * maxitems);
p->items[maxitems] = PROCPS_PIDS_physical_end;
p->curitems = p->maxitems = maxitems + 1;
libflags_set(p);
pgsz = getpagesize();
while (pgsz > 1024) { pgsz >>= 1; p->pgs2k_shift++; }
config_history(p);
p->hertz = procps_hertz_get();
procps_uptime(&uptime_secs, NULL);
p->boot_seconds = uptime_secs;
p->refcount = 1;
*info = p;
return 0;
} // end: procps_pids_new
PROCPS_EXPORT struct pids_stack *procps_pids_read_next (
struct procps_pidsinfo *info)
{
static proc_t task; // static for initial zeroes + later dynamic free(s)
if (info == NULL || ! READS_BEGUN)
return NULL;
if (info->dirty_stacks) {
cleanup_stack(info->read->stacks[0]->head, info->maxitems);
info->dirty_stacks = 0;
}
if (NULL == info->read_something(info->PT, &task))
return NULL;
assign_results(info, info->read->stacks[0], &task);
return info->read->stacks[0];
} // end: procps_pids_read_next
PROCPS_EXPORT int procps_pids_read_open (
struct procps_pidsinfo *info,
enum pids_reap_type which)
{
if (info == NULL || READS_BEGUN)
return -EINVAL;
if (!info->maxitems && !info->curitems)
return -EINVAL;
if (which != PROCPS_REAP_TASKS_ONLY && which != PROCPS_REAP_THREADS_TOO)
return -EINVAL;
if (!(info->read = alloc_stacks(info, 1)))
return -ENOMEM;
if (!oldproc_open(info, 0))
return -1;
info->read_something = which ? readeither : readproc;
return 0;
} // end: procps_pids_read_open
PROCPS_EXPORT int procps_pids_read_shut (
struct procps_pidsinfo *info)
{
if (info == NULL || ! READS_BEGUN)
return -EINVAL;
oldproc_close(info);
return dealloc_stacks(info, &info->read);
} // end: procps_pids_read_shut
/* procps_pids_reap():
*
* Harvest all the available tasks/threads and provide the result
* stacks along with a summary of the information gathered.
*
* Returns: pointer to a pids_reap struct on success, NULL on error.
*/
PROCPS_EXPORT struct pids_reap *procps_pids_reap (
struct procps_pidsinfo *info,
enum pids_reap_type which)
{
int rc;
if (info == NULL || READS_BEGUN)
return NULL;
if (!info->maxitems && !info->curitems)
return NULL;
if (which != PROCPS_REAP_TASKS_ONLY && which != PROCPS_REAP_THREADS_TOO)
return NULL;
if (!oldproc_open(info, 0))
return NULL;
info->read_something = which ? readeither : readproc;
rc = fetch_helper(info, &info->reap);
oldproc_close(info);
// we better have found at least 1 pid
return (rc > 0) ? &info->reap.summary : NULL;
} // end: procps_pids_reap
PROCPS_EXPORT int procps_pids_ref (
struct procps_pidsinfo *info)
{
if (info == NULL)
return -EINVAL;
info->refcount++;
return info->refcount;
} // end: procps_pids_ref
PROCPS_EXPORT int procps_pids_reset (
struct procps_pidsinfo *info,
int newmaxitems,
enum pids_item *newitems)
{
struct stacks_extent *ext;
int i;
if (info == NULL)
return -EINVAL;
/* disallow (for now?) absolute increases in stacks size
( users must 'unref' and then 'new' to achieve that ) */
if (newmaxitems + 1 > info->maxitems)
return -EINVAL;
if (items_check_failed(newmaxitems, newitems))
return -EINVAL;
/* shame on this caller, they didn't change anything. and unless they have
altered the depth of the stacks we're not gonna change anything either! */
if (info->curitems == newmaxitems + 1
&& !memcmp(info->items, newitems, sizeof(enum pids_item) * newmaxitems))
return 0;
if (info->dirty_stacks)
cleanup_stacks_all(info);
memcpy(info->items, newitems, sizeof(enum pids_item) * newmaxitems);
info->items[newmaxitems] = PROCPS_PIDS_logical_end;
// account for above PROCPS_PIDS_logical_end
info->curitems = newmaxitems + 1;
ext = info->extents;
while (ext) {
for (i = 0; ext->stacks[i]; i++)
stack_itemize(ext->stacks[i]->head, info->curitems, info->items);
#ifdef FPRINT_STACKS
validate_stacks(ext, __func__);
#endif
ext = ext->next;
};
libflags_set(info);
return 0;
} // end: procps_pids_reset
/* procps_pids_select():
*
* Harvest any processes matching the specified PID or UID and provide the
* result stacks along with a summary of the information gathered.
*
* Returns: pointer to a pids_reap struct on success, NULL on error.
*/
PROCPS_EXPORT struct pids_reap *procps_pids_select (
struct procps_pidsinfo *info,
unsigned *these,
int maxthese,
enum pids_fill_type which)
{
unsigned ids[FILL_ID_MAX + 1];
int rc;
if (info == NULL || these == NULL || READS_BEGUN)
return NULL;
if (maxthese < 1 || maxthese > FILL_ID_MAX)
return NULL;
if (which != PROCPS_FILL_PID && which != PROCPS_FILL_UID)
return NULL;
// this zero delimiter is really only needed with PROCPS_FILL_PID
memcpy(ids, these, sizeof(unsigned) * maxthese);
ids[maxthese] = 0;
if (!oldproc_open(info, which, ids, maxthese))
return NULL;
info->read_something = readproc;
rc = fetch_helper(info, &info->select);
oldproc_close(info);
// no guarantee any pids/uids were found
return (rc > -1) ? &info->select.summary : NULL;
} // end: procps_pids_select
/*
* procps_pids_sort():
*
* Sort stacks anchored in the passed pids_stack pointers array
* based on the designated sort enumerator and specified order.
*
* Returns those same addresses sorted.
*
* Note: all of the stacks must be homogeneous (of equal length and content).
*/
PROCPS_EXPORT struct pids_stack **procps_pids_sort (
struct procps_pidsinfo *info,
struct pids_stack *stacks[],
int numstacked,
enum pids_item sort,
enum pids_sort_order order)
{
struct sort_parms parms;
struct pids_result *p;
int offset;
if (info == NULL || stacks == NULL)
return NULL;
// a pids_item is currently unsigned, but we'll protect our future
if (sort < 0 || sort > PROCPS_PIDS_noop)
return NULL;
if (order != PROCPS_SORT_ASCEND && order != PROCPS_SORT_DESCEND)
return NULL;
if (numstacked < 2)
return stacks;
offset = 0;
p = stacks[0]->head;
for (;;) {
if (p->item == sort)
break;
++offset;
if (offset >= info->curitems)
return NULL;
if (p->item > PROCPS_PIDS_noop)
return NULL;
++p;
}
parms.offset = offset;
parms.order = order;
qsort_r(stacks, numstacked, sizeof(void *), (QSR_t)Item_table[p->item].sortfunc, &parms);
return stacks;
} // end: procps_pids_sort
PROCPS_EXPORT int procps_pids_unref (
struct procps_pidsinfo **info)
{
if (info == NULL || *info == NULL)
return -EINVAL;
(*info)->refcount--;
if ((*info)->refcount == 0) {
#ifdef UNREF_RPTHASH
unref_rpthash(*info);
#endif
if ((*info)->extents) {
cleanup_stacks_all(*info);
do {
struct stacks_extent *p = (*info)->extents;
(*info)->extents = (*info)->extents->next;
free(p);
} while ((*info)->extents);
}
if ((*info)->otherexts) {
struct stacks_extent *nextext, *ext = (*info)->otherexts;
while (ext) {
nextext = ext->next;
cleanup_stack(ext->stacks[0]->head, ext->ext_numitems);
free(ext);
ext = nextext;
};
}
if ((*info)->reap.anchor)
free((*info)->reap.anchor);
if ((*info)->reap.summary.stacks)
free((*info)->reap.summary.stacks);
if ((*info)->select.anchor)
free((*info)->select.anchor);
if ((*info)->select.summary.stacks)
free((*info)->select.summary.stacks);
if ((*info)->items)
free((*info)->items);
if ((*info)->hist) {
free((*info)->hist->PHist_sav);
free((*info)->hist->PHist_new);
free((*info)->hist);
}
free(*info);
*info = NULL;
return 0;
}
return (*info)->refcount;
} // end: procps_pids_unref
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