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procps/proc/pids.c
Jim Warner d53ff45b0d library: delete some obsolete parameter checking logic 
This commit removes some obsolete parameter validation
code which was needed back when certain functions were
public, called directly by users (1st/2nd generation).

Now that they're static they can be safely eliminated.

Signed-off-by: Jim Warner <james.warner@comcast.net>
2017-12-20 21:18:54 +11:00

1540 lines
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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/devname.h>
#include <proc/numa.h>
#include <proc/readproc.h>
#include <proc/sysinfo.h>
#include <proc/uptime.h>
#include <proc/wchan.h>
#include <proc/procps-private.h>
#include <proc/pids.h>
//#define UNREF_RPTHASH // report hash details at uref() time
#define FILL_ID_MAX 255 // upper limit with select of pid/uid
#define STACKS_INCR 128 // amount reap stack allocations grow
#define NEWOLD_INCR 128 // amt by which hist allocations grow
struct stacks_extent {
int ext_numstacks;
struct stacks_extent *next;
struct pids_stack **stacks;
};
struct fetch_support {
struct pids_stack **anchor; // reap/select consolidated extents
int n_alloc; // number of above pointers allocated
int n_inuse; // number of above pointers occupied
int n_alloc_save; // last known results.stacks allocation
struct pids_fetch results; // counts + stacks for return to caller
struct pids_counts counts; // actual counts pointed to by 'results'
};
struct pids_info {
int refcount;
int maxitems; // includes 'logical_end' delimiter
int curitems; // includes 'logical_end' delimiter
enum pids_item *items; // includes 'logical_end' delimiter
struct stacks_extent *extents; // anchor for all resettable extents
struct stacks_extent *otherexts; // anchor for single stack invariant extents
struct fetch_support fetch; // support for procps_pids_reap & select
int history_yes; // need historical data
struct history_info *hist; // pointer to historical support data
int dirty_stacks; // stacks results need attention
proc_t*(*read_something)(PROCTAB*, proc_t*); // readproc/readeither via which
unsigned pgs2k_shift; // to convert some proc vaules
unsigned oldflags; // the old library PROC_FILL flagss
PROCTAB *fetch_PT; // oldlib interface for 'select' & 'reap'
unsigned long hertz; // for TIME_ALL & TIME_ELAPSED calculations
unsigned long long boot_seconds; // for TIME_ELAPSED calculation
PROCTAB *get_PT; // oldlib interface for active 'get'
struct stacks_extent *get_ext; // an extent used for active 'get'
enum pids_fetch_type get_type; // last known type of 'get' request
int seterr; // an ENOMEM encountered during assign
};
// ___ Results 'Set' Support ||||||||||||||||||||||||||||||||||||||||||||||||||
static char** pids_vectorize_this (const char* src) {
#define pSZ (sizeof(char*))
char *cpy, **vec;
int adj, tot;
tot = strlen(src) + 1; // prep for our vectors
adj = (pSZ-1) - ((tot + pSZ-1) & (pSZ-1)); // calc alignment bytes
cpy = calloc(1, tot + adj + (2 * pSZ)); // get new larger buffer
if (!cpy) return NULL; // oops, looks like ENOMEM
snprintf(cpy, tot, "%s", src); // duplicate their string
vec = (char**)(cpy + tot + adj); // prep pointer to pointers
*vec = cpy; // point 1st vector to string
*(vec+1) = NULL; // null ptr 'list' delimit
return vec; // ==> free(*vec) to dealloc
#undef pSZ
} // end: pids_vectorize_this
#define setNAME(e) set_pids_ ## e
#define setDECL(e) static void setNAME(e) \
(struct pids_info *I, struct pids_result *R, proc_t *P)
/* convert pages to kib */
#define CVT_set(e,t,x) setDECL(e) { \
R->result. t = (long)(P-> x) << I -> pgs2k_shift; }
/* strdup of a static char array */
#define DUP_set(e,x) setDECL(e) { \
if (!(R->result.str = strdup(P-> x))) I->seterr = 1; }
/* regular assignment copy */
#define REG_set(e,t,x) setDECL(e) { \
(void)I; R->result. t = P-> x; }
/* take ownership of a normal single string if possible, else return
some sort of hint that they duplicated this char * item ... */
#define STR_set(e,x) setDECL(e) { \
if (NULL != P-> x) { R->result.str = P-> x; P-> x = NULL; } \
else { R->result.str = strdup("[ duplicate " STRINGIFY(e) " ]"); \
if (!R->result.str) I->seterr = 1; } }
/* take ownership of true vectorized strings if possible, else return
some sort of hint that they duplicated this char ** item ... */
#define VEC_set(e,x) setDECL(e) { \
if (NULL != P-> x) { R->result.strv = P-> x; P-> x = NULL; } \
else { R->result.strv = pids_vectorize_this("[ duplicate " STRINGIFY(e) " ]"); \
if (!R->result.str) I->seterr = 1; } }
setDECL(noop) { (void)I; (void)R; (void)P; return; }
setDECL(extra) { (void)I; (void)R; (void)P; return; }
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)
STR_set(CGNAME, cgname)
STR_set(CGROUP, cgroup)
VEC_set(CGROUP_V, cgroup_v)
STR_set(CMD, cmd)
STR_set(CMDLINE, cmdline)
VEC_set(CMDLINE_V, cmdline_v)
STR_set(ENVIRON, environ)
VEC_set(ENVIRON_V, environ_v)
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, s_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, s_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)
REG_set(LXCNAME, str, lxcname)
CVT_set(MEM_CODE, ul_int, trs)
REG_set(MEM_CODE_PGS, ul_int, trs)
CVT_set(MEM_DATA, ul_int, drs)
REG_set(MEM_DATA_PGS, ul_int, drs)
CVT_set(MEM_RES, ul_int, resident)
REG_set(MEM_RES_PGS, ul_int, resident)
CVT_set(MEM_SHR, ul_int, share)
REG_set(MEM_SHR_PGS, ul_int, share)
CVT_set(MEM_VIRT, ul_int, size)
REG_set(MEM_VIRT_PGS, ul_int, size)
REG_set(NICE, s_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)
setDECL(PROCESSOR_NODE) { (void)I; R->result.s_int = numa_node_of_cpu(P->processor); }
REG_set(RSS, ul_int, rss)
REG_set(RSS_RLIM, ul_int, rss_rlim)
REG_set(RTPRIO, s_int, rtprio)
REG_set(SCHED_CLASS, s_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_ALL_DELTA, s_int, pcpu)
REG_set(TICS_BLKIO, ull_int, blkio_tics)
REG_set(TICS_GUEST, ull_int, gtime)
setDECL(TICS_GUEST_C) { (void)I; R->result.ull_int = P->gtime + P->cgtime; }
REG_set(TICS_SYSTEM, ull_int, stime)
setDECL(TICS_SYSTEM_C) { (void)I; R->result.ull_int = P->stime + P->cstime; }
REG_set(TICS_USER, ull_int, utime)
setDECL(TICS_USER_C) { (void)I; R->result.ull_int = P->utime + P->cutime; }
setDECL(TIME_ALL) { R->result.ull_int = (P->utime + P->stime) / I->hertz; }
setDECL(TIME_ELAPSED) { unsigned long long t = P->start_time / I->hertz; R->result.ull_int = I->boot_seconds >= t ? (I->boot_seconds - t) : 0; }
REG_set(TIME_START, ull_int, start_time)
REG_set(TTY, s_int, tty)
setDECL(TTY_NAME) { char buf[64]; dev_to_tty(buf, sizeof(buf), P->tty, P->tid, ABBREV_DEV); if (!(R->result.str = strdup(buf))) I->seterr = 1; }
setDECL(TTY_NUMBER) { char buf[64]; dev_to_tty(buf, sizeof(buf), P->tty, P->tid, ABBREV_DEV|ABBREV_TTY|ABBREV_PTS); if (!(R->result.str = strdup(buf))) I->seterr = 1; }
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_RSS, ul_int, vm_rss)
REG_set(VM_RSS_ANON, ul_int, vm_rss_anon)
REG_set(VM_RSS_FILE, ul_int, vm_rss_file)
REG_set(VM_RSS_LOCKED, ul_int, vm_lock)
REG_set(VM_RSS_SHARED, ul_int, vm_rss_shared)
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)
setDECL(WCHAN_NAME) { if (!(R->result.str = strdup(lookup_wchan(P->tid)))) I->seterr = 1;; }
#undef setDECL
#undef CVT_set
#undef DUP_set
#undef REG_set
#undef STR_set
#undef VEC_set
// ___ Free Storage Support |||||||||||||||||||||||||||||||||||||||||||||||||||
#define freNAME(t) free_pids_ ## t
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(t) sort_pids_ ## t
#define srtDECL(t) static int srtNAME(t) \
(const struct pids_stack **A, const struct pids_stack **B, struct sort_parms *P)
#define NUM_srt(T) srtDECL(T) { \
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) srtDECL(T) { \
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)
REG_srt(u_int)
REG_srt(ul_int)
REG_srt(ull_int)
srtDECL(str) {
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);
}
srtDECL(strv) {
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));
}
srtDECL(strvers) {
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);
}
srtDECL(noop) {
(void)A; (void)B; (void)P;
return 0;
}
#undef srtDECL
#undef NUM_srt
#undef REG_srt
// ___ Controlling Table ||||||||||||||||||||||||||||||||||||||||||||||||||||||
#define f_either PROC_SPARE_1 // either status or stat (favor stat)
#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 a single string (never vectorized)
#define x_cgroup PROC_EDITCGRPCVT
#define x_cmdline PROC_EDITCMDLCVT
#define x_environ PROC_EDITENVRCVT
// 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
#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 pids_info *, 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(t) (FRE_t)freNAME(t)
#define QS(t) (QSR_t)srtNAME(t)
#define TS(t) STRINGIFY(t)
#define TS_noop ""
/*
* 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
char *type2str; // the result type as a string value
} Item_table[] = {
/* setsfunc oldflags freefunc sortfunc needhist type2str
--------------------- ---------- --------- ------------- -------- ----------- */
{ RS(noop), 0, NULL, QS(noop), 0, TS_noop }, // user only, never altered
{ RS(extra), 0, NULL, QS(ull_int), 0, TS_noop }, // user only, reset to zero
{ RS(ADDR_END_CODE), f_stat, NULL, QS(ul_int), 0, TS(ul_int) },
{ RS(ADDR_KSTK_EIP), f_stat, NULL, QS(ul_int), 0, TS(ul_int) },
{ RS(ADDR_KSTK_ESP), f_stat, NULL, QS(ul_int), 0, TS(ul_int) },
{ RS(ADDR_START_CODE), f_stat, NULL, QS(ul_int), 0, TS(ul_int) },
{ RS(ADDR_START_STACK), f_stat, NULL, QS(ul_int), 0, TS(ul_int) },
{ RS(CGNAME), x_cgroup, FF(str), QS(str), 0, TS(str) },
{ RS(CGROUP), x_cgroup, FF(str), QS(str), 0, TS(str) },
{ RS(CGROUP_V), v_cgroup, FF(strv), QS(strv), 0, TS(strv) },
{ RS(CMD), f_either, FF(str), QS(str), 0, TS(str) },
{ RS(CMDLINE), x_cmdline, FF(str), QS(str), 0, TS(str) },
{ RS(CMDLINE_V), v_arg, FF(strv), QS(strv), 0, TS(strv) },
{ RS(ENVIRON), x_environ, FF(str), QS(str), 0, TS(str) },
{ RS(ENVIRON_V), v_env, FF(strv), QS(strv), 0, TS(strv) },
{ RS(EXIT_SIGNAL), f_stat, NULL, QS(s_int), 0, TS(s_int) },
{ RS(FLAGS), f_stat, NULL, QS(ul_int), 0, TS(ul_int) },
{ RS(FLT_MAJ), f_stat, NULL, QS(ul_int), 0, TS(ul_int) },
{ RS(FLT_MAJ_C), f_stat, NULL, QS(ul_int), 0, TS(ul_int) },
{ RS(FLT_MAJ_DELTA), f_stat, NULL, QS(s_int), +1, TS(s_int) },
{ RS(FLT_MIN), f_stat, NULL, QS(ul_int), 0, TS(ul_int) },
{ RS(FLT_MIN_C), f_stat, NULL, QS(ul_int), 0, TS(ul_int) },
{ RS(FLT_MIN_DELTA), f_stat, NULL, QS(s_int), +1, TS(s_int) },
{ RS(ID_EGID), 0, NULL, QS(u_int), 0, TS(u_int) }, // oldflags: free w/ simple_read
{ RS(ID_EGROUP), f_grp, NULL, QS(str), 0, TS(str) },
{ RS(ID_EUID), 0, NULL, QS(u_int), 0, TS(u_int) }, // oldflags: free w/ simple_read
{ RS(ID_EUSER), f_usr, NULL, QS(str), 0, TS(str) }, // freefunc NULL w/ cached string
{ RS(ID_FGID), f_status, NULL, QS(u_int), 0, TS(u_int) },
{ RS(ID_FGROUP), x_ogroup, NULL, QS(str), 0, TS(str) },
{ RS(ID_FUID), f_status, NULL, QS(u_int), 0, TS(u_int) },
{ RS(ID_FUSER), x_ouser, NULL, QS(str), 0, TS(str) }, // freefunc NULL w/ cached string
{ RS(ID_PGRP), f_stat, NULL, QS(s_int), 0, TS(s_int) },
{ RS(ID_PID), 0, NULL, QS(s_int), 0, TS(s_int) }, // oldflags: free w/ simple_nextpid
{ RS(ID_PPID), f_either, NULL, QS(s_int), 0, TS(s_int) },
{ RS(ID_RGID), f_status, NULL, QS(u_int), 0, TS(u_int) },
{ RS(ID_RGROUP), x_ogroup, NULL, QS(str), 0, TS(str) },
{ RS(ID_RUID), f_status, NULL, QS(u_int), 0, TS(u_int) },
{ RS(ID_RUSER), x_ouser, NULL, QS(str), 0, TS(str) }, // freefunc NULL w/ cached string
{ RS(ID_SESSION), f_stat, NULL, QS(s_int), 0, TS(s_int) },
{ RS(ID_SGID), f_status, NULL, QS(u_int), 0, TS(u_int) },
{ RS(ID_SGROUP), x_ogroup, NULL, QS(str), 0, TS(str) },
{ RS(ID_SUID), f_status, NULL, QS(u_int), 0, TS(u_int) },
{ RS(ID_SUSER), x_ouser, NULL, QS(str), 0, TS(str) }, // freefunc NULL w/ cached string
{ RS(ID_TGID), 0, NULL, QS(s_int), 0, TS(s_int) }, // oldflags: free w/ simple_nextpid
{ RS(ID_TPGID), f_stat, NULL, QS(s_int), 0, TS(s_int) },
{ RS(LXCNAME), f_lxc, NULL, QS(str), 0, TS(str) }, // freefunc NULL w/ cached string
{ RS(MEM_CODE), f_statm, NULL, QS(ul_int), 0, TS(ul_int) },
{ RS(MEM_CODE_PGS), f_statm, NULL, QS(ul_int), 0, TS(ul_int) },
{ RS(MEM_DATA), f_statm, NULL, QS(ul_int), 0, TS(ul_int) },
{ RS(MEM_DATA_PGS), f_statm, NULL, QS(ul_int), 0, TS(ul_int) },
{ RS(MEM_RES), f_statm, NULL, QS(ul_int), 0, TS(ul_int) },
{ RS(MEM_RES_PGS), f_statm, NULL, QS(ul_int), 0, TS(ul_int) },
{ RS(MEM_SHR), f_statm, NULL, QS(ul_int), 0, TS(ul_int) },
{ RS(MEM_SHR_PGS), f_statm, NULL, QS(ul_int), 0, TS(ul_int) },
{ RS(MEM_VIRT), f_statm, NULL, QS(ul_int), 0, TS(ul_int) },
{ RS(MEM_VIRT_PGS), f_statm, NULL, QS(ul_int), 0, TS(ul_int) },
{ RS(NICE), f_stat, NULL, QS(s_int), 0, TS(s_int) },
{ RS(NLWP), f_either, NULL, QS(s_int), 0, TS(s_int) },
{ RS(NS_IPC), f_ns, NULL, QS(ul_int), 0, TS(ul_int) },
{ RS(NS_MNT), f_ns, NULL, QS(ul_int), 0, TS(ul_int) },
{ RS(NS_NET), f_ns, NULL, QS(ul_int), 0, TS(ul_int) },
{ RS(NS_PID), f_ns, NULL, QS(ul_int), 0, TS(ul_int) },
{ RS(NS_USER), f_ns, NULL, QS(ul_int), 0, TS(ul_int) },
{ RS(NS_UTS), f_ns, NULL, QS(ul_int), 0, TS(ul_int) },
{ RS(OOM_ADJ), f_oom, NULL, QS(s_int), 0, TS(s_int) },
{ RS(OOM_SCORE), f_oom, NULL, QS(s_int), 0, TS(s_int) },
{ RS(PRIORITY), f_stat, NULL, QS(s_int), 0, TS(s_int) },
{ RS(PROCESSOR), f_stat, NULL, QS(u_int), 0, TS(u_int) },
{ RS(PROCESSOR_NODE), f_stat, NULL, QS(s_int), 0, TS(s_int) },
{ RS(RSS), f_stat, NULL, QS(ul_int), 0, TS(ul_int) },
{ RS(RSS_RLIM), f_stat, NULL, QS(ul_int), 0, TS(ul_int) },
{ RS(RTPRIO), f_stat, NULL, QS(s_int), 0, TS(s_int) },
{ RS(SCHED_CLASS), f_stat, NULL, QS(s_int), 0, TS(s_int) },
{ RS(SD_MACH), f_systemd, FF(str), QS(str), 0, TS(str) },
{ RS(SD_OUID), f_systemd, FF(str), QS(str), 0, TS(str) },
{ RS(SD_SEAT), f_systemd, FF(str), QS(str), 0, TS(str) },
{ RS(SD_SESS), f_systemd, FF(str), QS(str), 0, TS(str) },
{ RS(SD_SLICE), f_systemd, FF(str), QS(str), 0, TS(str) },
{ RS(SD_UNIT), f_systemd, FF(str), QS(str), 0, TS(str) },
{ RS(SD_UUNIT), f_systemd, FF(str), QS(str), 0, TS(str) },
{ RS(SIGBLOCKED), f_status, FF(str), QS(str), 0, TS(str) },
{ RS(SIGCATCH), f_status, FF(str), QS(str), 0, TS(str) },
{ RS(SIGIGNORE), f_status, FF(str), QS(str), 0, TS(str) },
{ RS(SIGNALS), f_status, FF(str), QS(str), 0, TS(str) },
{ RS(SIGPENDING), f_status, FF(str), QS(str), 0, TS(str) },
{ RS(STATE), f_either, NULL, QS(s_ch), 0, TS(s_ch) },
{ RS(SUPGIDS), f_status, FF(str), QS(str), 0, TS(str) },
{ RS(SUPGROUPS), x_supgrp, FF(str), QS(str), 0, TS(str) },
{ RS(TICS_ALL), f_stat, NULL, QS(ull_int), 0, TS(ull_int) },
{ RS(TICS_ALL_C), f_stat, NULL, QS(ull_int), 0, TS(ull_int) },
{ RS(TICS_ALL_DELTA), f_stat, NULL, QS(s_int), +1, TS(s_int) },
{ RS(TICS_BLKIO), f_stat, NULL, QS(ull_int), 0, TS(ull_int) },
{ RS(TICS_GUEST), f_stat, NULL, QS(ull_int), 0, TS(ull_int) },
{ RS(TICS_GUEST_C), f_stat, NULL, QS(ull_int), 0, TS(ull_int) },
{ RS(TICS_SYSTEM), f_stat, NULL, QS(ull_int), 0, TS(ull_int) },
{ RS(TICS_SYSTEM_C), f_stat, NULL, QS(ull_int), 0, TS(ull_int) },
{ RS(TICS_USER), f_stat, NULL, QS(ull_int), 0, TS(ull_int) },
{ RS(TICS_USER_C), f_stat, NULL, QS(ull_int), 0, TS(ull_int) },
{ RS(TIME_ALL), f_stat, NULL, QS(ull_int), 0, TS(ull_int) },
{ RS(TIME_ELAPSED), f_stat, NULL, QS(ull_int), 0, TS(ull_int) },
{ RS(TIME_START), f_stat, NULL, QS(ull_int), 0, TS(ull_int) },
{ RS(TTY), f_stat, NULL, QS(s_int), 0, TS(s_int) },
{ RS(TTY_NAME), f_stat, FF(str), QS(strvers), 0, TS(str) },
{ RS(TTY_NUMBER), f_stat, FF(str), QS(strvers), 0, TS(str) },
{ RS(VM_DATA), f_status, NULL, QS(ul_int), 0, TS(ul_int) },
{ RS(VM_EXE), f_status, NULL, QS(ul_int), 0, TS(ul_int) },
{ RS(VM_LIB), f_status, NULL, QS(ul_int), 0, TS(ul_int) },
{ RS(VM_RSS), f_status, NULL, QS(ul_int), 0, TS(ul_int) },
{ RS(VM_RSS_ANON), f_status, NULL, QS(ul_int), 0, TS(ul_int) },
{ RS(VM_RSS_FILE), f_status, NULL, QS(ul_int), 0, TS(ul_int) },
{ RS(VM_RSS_LOCKED), f_status, NULL, QS(ul_int), 0, TS(ul_int) },
{ RS(VM_RSS_SHARED), f_status, NULL, QS(ul_int), 0, TS(ul_int) },
{ RS(VM_SIZE), f_status, NULL, QS(ul_int), 0, TS(ul_int) },
{ RS(VM_STACK), f_status, NULL, QS(ul_int), 0, TS(ul_int) },
{ RS(VM_SWAP), f_status, NULL, QS(ul_int), 0, TS(ul_int) },
{ RS(VM_USED), f_status, NULL, QS(ul_int), 0, TS(ul_int) },
{ RS(VSIZE_PGS), f_stat, NULL, QS(ul_int), 0, TS(ul_int) },
{ RS(WCHAN_NAME), 0, FF(str), QS(str), 0, TS(str) }, // oldflags: tid already free
// dummy entry corresponding to PIDS_logical_end ...
{ NULL, 0, NULL, NULL, 0, NULL }
};
/* please note,
* this enum MUST be 1 greater than the highest value of any enum */
enum pids_item PIDS_logical_end = PIDS_WCHAN_NAME + 1;
#undef setNAME
#undef freNAME
#undef srtNAME
#undef RS
#undef FF
#undef QS
//#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 pids_config_history (
struct pids_info *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: pids_config_history
static inline HST_t *pids_histget (
struct pids_info *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: pids_histget
static inline void pids_histput (
struct pids_info *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: pids_histput
#undef _HASH_PID_
static inline int pids_make_hist (
struct pids_info *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) += NEWOLD_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 0;
}
Hr(PHist_new[nSLOT].pid) = p->tid;
Hr(PHist_new[nSLOT].maj) = p->maj_flt;
Hr(PHist_new[nSLOT].min) = p->min_flt;
Hr(PHist_new[nSLOT].tics) = tics = (p->utime + p->stime);
pids_histput(info, nSLOT);
if ((h = pids_histget(info, p->tid))) {
p->pcpu = tics - h->tics;
p->maj_delta = p->maj_flt - h->maj;
p->min_delta = p->min_flt - h->min;
}
nSLOT++;
return 1;
#undef nSLOT
} // end: pids_make_hist
static inline void pids_toggle_history (
struct pids_info *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: pids_toggle_history
#ifdef UNREF_RPTHASH
static void pids_unref_rpthash (
struct pids_info *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: pids_unref_rpthash
#endif // UNREF_RPTHASH
#undef Hr
#undef HHASH_SIZE
// ___ Standard Private Functions |||||||||||||||||||||||||||||||||||||||||||||
static inline int pids_assign_results (
struct pids_info *info,
struct pids_stack *stack,
proc_t *p)
{
struct pids_result *this = stack->head;
info->seterr = 0;
for (;;) {
enum pids_item item = this->item;
if (item >= PIDS_logical_end)
break;
Item_table[item].setsfunc(info, this, p);
++this;
}
return !info->seterr;
} // end: pids_assign_results
static inline void pids_cleanup_stack (
struct pids_result *this)
{
for (;;) {
enum pids_item item = this->item;
if (item >= PIDS_logical_end)
break;
if (Item_table[item].freefunc)
Item_table[item].freefunc(this);
if (item > PIDS_noop)
this->result.ull_int = 0;
++this;
}
} // end: pids_cleanup_stack
static inline void pids_cleanup_stacks_all (
struct pids_info *info)
{
struct stacks_extent *ext = info->extents;
int i;
while (ext) {
for (i = 0; ext->stacks[i]; i++)
pids_cleanup_stack(ext->stacks[i]->head);
ext = ext->next;
};
info->dirty_stacks = 0;
} // end: pids_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 *pids_extent_cut (
struct pids_info *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: pids_extent_cut
static inline struct pids_result *pids_itemize_stack (
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: pids_itemize_stack
static void pids_itemize_stacks_all (
struct pids_info *info)
{
struct stacks_extent *ext = info->extents;
while (ext) {
int i;
for (i = 0; ext->stacks[i]; i++)
pids_itemize_stack(ext->stacks[i]->head, info->curitems, info->items);
ext = ext->next;
};
info->dirty_stacks = 0;
} // end: pids_itemize_stacks_all
static inline int pids_items_check_failed (
enum pids_item *items,
int numitems)
{
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, PIDS_noop, 3) < 0)
* ^~~~~~~~~~~~~~~~
*/
if (numitems < 1
|| (void *)items < (void *)0x8000) // twice as big as our largest enum
return 1;
for (i = 0; i < numitems; i++) {
// a pids_item is currently unsigned, but we'll protect our future
if (items[i] < 0)
return 1;
if (items[i] >= PIDS_logical_end) {
return 1;
}
}
return 0;
} // end: pids_items_check_failed
static inline void pids_libflags_set (
struct pids_info *info)
{
enum pids_item e;
int i;
info->oldflags = info->history_yes = 0;
for (i = 0; i < info->curitems; i++) {
if (((e = info->items[i])) >= PIDS_logical_end)
break;
info->oldflags |= Item_table[e].oldflags;
info->history_yes |= Item_table[e].needhist;
}
if (info->oldflags & f_either) {
if (!(info->oldflags & (f_stat | f_status)))
info->oldflags |= f_stat;
}
return;
} // end: pids_libflags_set
static inline void pids_oldproc_close (
PROCTAB **this)
{
if (*this != NULL) {
int errsav = errno;
closeproc(*this);
*this = NULL;
errno = errsav;
}
} // end: pids_oldproc_close
static inline int pids_oldproc_open (
PROCTAB **this,
unsigned flags,
...)
{
va_list vl;
int *ids;
int num = 0;
if (*this == NULL) {
va_start(vl, flags);
ids = va_arg(vl, int*);
if (flags & PROC_UID) num = va_arg(vl, int);
va_end(vl);
if (NULL == (*this = openproc(flags, ids, num)))
return 0;
}
return 1;
} // end: pids_oldproc_open
static inline int pids_proc_tally (
struct pids_info *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 pids_make_hist(info, p);
return 1;
} // end: pids_proc_tally
/*
* pids_stacks_alloc():
*
* Allocate and initialize one or more stacks each of which is anchored in an
* associated context structure.
*
* 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 *pids_stacks_alloc (
struct pids_info *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;
vect_size = sizeof(void *) * maxstacks; // size of the addr vectors |
vect_size += sizeof(void *); // plus NULL addr delimiter |
head_size = sizeof(struct pids_stack); // size of that head struct |
list_size = sizeof(struct pids_result) * info->maxitems; // any single results stack |
blob_size = sizeof(struct stacks_extent); // the extent anchor itself |
blob_size += vect_size; // plus room for addr vects |
blob_size += head_size * maxstacks; // plus room for head thing |
blob_size += list_size * maxstacks; // plus room for our stacks |
/* note: all of our memory is allocated in a single blob, facilitating a later free(). |
as a minimum, it is important that the result structures themselves always be |
contiguous for every stack since they are accessed through relative position. | */
if (NULL == (p_blob = calloc(1, blob_size)))
return NULL;
p_blob->next = info->extents; // push this extent onto... |
info->extents = p_blob; // ...some existing extents |
p_vect = (void *)p_blob + sizeof(struct stacks_extent); // prime our vector pointer |
p_blob->stacks = p_vect; // set actual vectors start |
v_head = (void *)p_vect + vect_size; // prime head pointer start |
v_list = v_head + (head_size * maxstacks); // prime our stacks pointer |
for (i = 0; i < maxstacks; i++) {
p_head = (struct pids_stack *)v_head;
p_head->head = pids_itemize_stack((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_numstacks = maxstacks;
return p_blob;
} // end: pids_stacks_alloc
static int pids_stacks_fetch (
struct pids_info *info)
{
#define n_alloc info->fetch.n_alloc
#define n_inuse info->fetch.n_inuse
#define n_saved info->fetch.n_alloc_save
static proc_t task; // static for initial zeroes + later dynamic free(s)
struct stacks_extent *ext;
// initialize stuff -----------------------------------
if (!info->fetch.anchor) {
if (!(info->fetch.anchor = calloc(sizeof(void *), STACKS_INCR)))
return -1;
n_alloc = STACKS_INCR;
}
if (!info->extents) {
if (!(ext = pids_stacks_alloc(info, n_alloc)))
return -1; // here, errno was set to ENOMEM
memset(info->fetch.anchor, 0, sizeof(void *) * n_alloc);
memcpy(info->fetch.anchor, ext->stacks, sizeof(void *) * n_alloc);
}
pids_cleanup_stacks_all(info);
pids_toggle_history(info);
memset(&info->fetch.counts, 0, sizeof(struct pids_counts));
// iterate stuff --------------------------------------
n_inuse = 0;
while (info->read_something(info->fetch_PT, &task)) {
if (!(n_inuse < n_alloc)) {
n_alloc += STACKS_INCR;
if (!(info->fetch.anchor = realloc(info->fetch.anchor, sizeof(void *) * n_alloc))
|| (!(ext = pids_stacks_alloc(info, STACKS_INCR))))
return -1; // here, errno was set to ENOMEM
memcpy(info->fetch.anchor + n_inuse, ext->stacks, sizeof(void *) * STACKS_INCR);
}
if (!pids_proc_tally(info, &info->fetch.counts, &task))
return -1; // here, errno was set to ENOMEM
if (!pids_assign_results(info, info->fetch.anchor[n_inuse++], &task))
return -1; // here, errno was set to ENOMEM
}
/* while the possibility is extremely remote, the readproc.c (read_something)
simple_readproc and simple_readtask guys could have encountered this error
in which case they would have returned a NULL, thus ending our while loop. */
if (errno == ENOMEM)
return -1;
// finalize stuff -------------------------------------
/* note: we go to this trouble of maintaining a duplicate of the consolidated |
extent stacks addresses represented as our 'anchor' since these ptrs |
are exposed to a user (um, not that we don't trust 'em or anything). |
plus, we can NULL delimit these ptrs which we couldn't do otherwise. | */
if (n_saved < n_inuse + 1) {
n_saved = n_inuse + 1;
if (!(info->fetch.results.stacks = realloc(info->fetch.results.stacks, sizeof(void *) * n_saved)))
return -1;
}
memcpy(info->fetch.results.stacks, info->fetch.anchor, sizeof(void *) * n_inuse);
info->fetch.results.stacks[n_inuse] = NULL;
info->dirty_stacks = 1;
return n_inuse; // callers beware, this might be zero !
#undef n_alloc
#undef n_inuse
#undef n_saved
} // end: pids_stacks_fetch
// ___ Public Functions |||||||||||||||||||||||||||||||||||||||||||||||||||||||
// --- standard required functions --------------------------------------------
/*
* procps_pids_new():
*
* @info: location of returned new structure
*
* Returns: < 0 on failure, 0 on success along with
* a pointer to a new context struct
*/
PROCPS_EXPORT int procps_pids_new (
struct pids_info **info,
enum pids_item *items,
int numitems)
{
struct pids_info *p;
double uptime_secs;
int pgsz;
if (info == NULL || *info != NULL)
return -EINVAL;
if (!(p = calloc(1, sizeof(struct pids_info))))
return -ENOMEM;
/* if we're without items or numitems, a later call to
procps_pids_reset() will become mandatory */
if (items && numitems) {
if (pids_items_check_failed(items, numitems)) {
free(p);
return -EINVAL;
}
// allow for our PIDS_logical_end
p->maxitems = numitems + 1;
if (!(p->items = calloc(p->maxitems, sizeof(enum pids_item)))) {
free(p);
return -ENOMEM;
}
memcpy(p->items, items, sizeof(enum pids_item) * numitems);
p->items[numitems] = PIDS_logical_end;
p->curitems = p->maxitems;
pids_libflags_set(p);
}
if (!(p->hist = calloc(NEWOLD_INCR, sizeof(struct history_info)))) {
free(p->items);
free(p);
return -ENOMEM;
}
pids_config_history(p);
pgsz = getpagesize();
while (pgsz > 1024) { pgsz >>= 1; p->pgs2k_shift++; }
p->hertz = procps_hertz_get();
procps_uptime(&uptime_secs, NULL);
p->boot_seconds = uptime_secs;
numa_init();
p->fetch.results.counts = &p->fetch.counts;
p->refcount = 1;
*info = p;
return 0;
} // end: procps_pids_new
PROCPS_EXPORT int procps_pids_ref (
struct pids_info *info)
{
if (info == NULL)
return -EINVAL;
info->refcount++;
return info->refcount;
} // end: procps_pids_ref
PROCPS_EXPORT int procps_pids_unref (
struct pids_info **info)
{
if (info == NULL || *info == NULL)
return -EINVAL;
(*info)->refcount--;
if ((*info)->refcount < 1) {
#ifdef UNREF_RPTHASH
pids_unref_rpthash(*info);
#endif
if ((*info)->extents) {
pids_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;
pids_cleanup_stack(ext->stacks[0]->head);
free(ext);
ext = nextext;
};
}
if ((*info)->fetch.anchor)
free((*info)->fetch.anchor);
if ((*info)->fetch.results.stacks)
free((*info)->fetch.results.stacks);
if ((*info)->items)
free((*info)->items);
if ((*info)->hist) {
free((*info)->hist->PHist_sav);
free((*info)->hist->PHist_new);
free((*info)->hist);
}
numa_uninit();
free(*info);
*info = NULL;
return 0;
}
return (*info)->refcount;
} // end: procps_pids_unref
// --- variable interface functions -------------------------------------------
PROCPS_EXPORT struct pids_stack *fatal_proc_unmounted (
struct pids_info *info,
int return_self)
{
static proc_t self;
struct stacks_extent *ext;
/* this is very likely the *only* newlib function where the
context (pids_info) of NULL will ever be permitted */
if (!look_up_our_self(&self)
|| (!return_self))
return NULL;
errno = EINVAL;
if (info == NULL)
return NULL;
/* with items & numitems technically optional at 'new' time, it's
expected 'reset' will have been called -- but just in case ... */
if (!info->curitems)
return NULL;
errno = 0;
if (!(ext = pids_stacks_alloc(info, 1)))
return NULL;
if (!pids_extent_cut(info, ext)) {
errno = EADDRNOTAVAIL;
return NULL;
}
ext->next = info->otherexts;
info->otherexts = ext;
if (!pids_assign_results(info, ext->stacks[0], &self))
return NULL;
return ext->stacks[0];
} // end: fatal_proc_unmounted
PROCPS_EXPORT struct pids_stack *procps_pids_get (
struct pids_info *info,
enum pids_fetch_type which)
{
static proc_t task; // static for initial zeroes + later dynamic free(s)
errno = EINVAL;
if (info == NULL)
return NULL;
if (which != PIDS_FETCH_TASKS_ONLY && which != PIDS_FETCH_THREADS_TOO)
return NULL;
/* with items & numitems technically optional at 'new' time, it's
expected 'reset' will have been called -- but just in case ... */
if (!info->curitems)
return NULL;
fresh_start:
if (!info->get_ext) {
if (!(info->get_ext = pids_stacks_alloc(info, 1)))
return NULL; // here, errno was overridden with ENOMEM
if (!pids_oldproc_open(&info->get_PT, info->oldflags))
return NULL; // here, errno was overridden with ENOMEM/others
info->get_type = which;
info->read_something = which ? readeither : readproc;
}
if (info->get_type != which) {
pids_oldproc_close(&info->get_PT);
pids_cleanup_stack(info->get_ext->stacks[0]->head);
if (pids_extent_cut(info, info->get_ext))
free(info->get_ext);
info->get_ext = NULL;
goto fresh_start;
}
errno = 0;
pids_cleanup_stack(info->get_ext->stacks[0]->head);
if (NULL == info->read_something(info->get_PT, &task))
return NULL;
if (!pids_assign_results(info, info->get_ext->stacks[0], &task))
return NULL;
return info->get_ext->stacks[0];
} // end: procps_pids_get
/* 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_fetch struct on success, NULL on error.
*/
PROCPS_EXPORT struct pids_fetch *procps_pids_reap (
struct pids_info *info,
enum pids_fetch_type which)
{
int rc;
errno = EINVAL;
if (info == NULL)
return NULL;
if (which != PIDS_FETCH_TASKS_ONLY && which != PIDS_FETCH_THREADS_TOO)
return NULL;
/* with items & numitems technically optional at 'new' time, it's
expected 'reset' will have been called -- but just in case ... */
if (!info->curitems)
return NULL;
errno = 0;
if (!pids_oldproc_open(&info->fetch_PT, info->oldflags))
return NULL;
info->read_something = which ? readeither : readproc;
rc = pids_stacks_fetch(info);
pids_oldproc_close(&info->fetch_PT);
// we better have found at least 1 pid
return (rc > 0) ? &info->fetch.results : NULL;
} // end: procps_pids_reap
PROCPS_EXPORT int procps_pids_reset (
struct pids_info *info,
enum pids_item *newitems,
int newnumitems)
{
if (info == NULL || newitems == NULL)
return -EINVAL;
if (pids_items_check_failed(newitems, newnumitems))
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 == newnumitems + 1
&& !memcmp(info->items, newitems, sizeof(enum pids_item) * newnumitems))
return 0;
if (info->maxitems < newnumitems + 1) {
if (info->dirty_stacks)
pids_cleanup_stacks_all(info);
while (info->extents) {
struct stacks_extent *p = info->extents;
info->extents = p->next;
free(p);
};
// allow for our PIDS_logical_end
info->maxitems = newnumitems + 1;
if (!(info->items = realloc(info->items, sizeof(enum pids_item) * info->maxitems)))
return -ENOMEM;
}
if (info->dirty_stacks)
pids_cleanup_stacks_all(info);
memcpy(info->items, newitems, sizeof(enum pids_item) * newnumitems);
info->items[newnumitems] = PIDS_logical_end;
// account for above PIDS_logical_end
info->curitems = newnumitems + 1;
pids_itemize_stacks_all(info);
pids_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_fetch struct on success, NULL on error.
*/
PROCPS_EXPORT struct pids_fetch *procps_pids_select (
struct pids_info *info,
unsigned *these,
int numthese,
enum pids_select_type which)
{
unsigned ids[FILL_ID_MAX + 1];
int rc;
errno = EINVAL;
if (info == NULL || these == NULL)
return NULL;
if (numthese < 1 || numthese > FILL_ID_MAX)
return NULL;
if (which != PIDS_SELECT_PID && which != PIDS_SELECT_UID)
return NULL;
/* with items & numitems technically optional at 'new' time, it's
expected 'reset' will have been called -- but just in case ... */
if (!info->curitems)
return NULL;
errno = 0;
// this zero delimiter is really only needed with PIDS_SELECT_PID
memcpy(ids, these, sizeof(unsigned) * numthese);
ids[numthese] = 0;
if (!pids_oldproc_open(&info->fetch_PT, (info->oldflags | which), ids, numthese))
return NULL;
info->read_something = readproc;
rc = pids_stacks_fetch(info);
pids_oldproc_close(&info->fetch_PT);
// no guarantee any pids/uids were found
return (rc >= 0) ? &info->fetch.results : NULL;
} // end: procps_pids_select
/*
* procps_pids_sort():
*
* Sort stacks anchored in the passed 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 pids_info *info,
struct pids_stack *stacks[],
int numstacked,
enum pids_item sortitem,
enum pids_sort_order order)
{
struct sort_parms parms;
struct pids_result *p;
int offset;
errno = EINVAL;
if (info == NULL || stacks == NULL)
return NULL;
// a pids_item is currently unsigned, but we'll protect our future
if (sortitem < 0 || sortitem >= PIDS_logical_end)
return NULL;
if (order != PIDS_SORT_ASCEND && order != PIDS_SORT_DESCEND)
return NULL;
if (numstacked < 2)
return stacks;
offset = 0;
p = stacks[0]->head;
for (;;) {
if (p->item == sortitem)
break;
++offset;
if (offset >= info->curitems)
return NULL;
if (p->item >= PIDS_logical_end)
return NULL;
++p;
}
errno = 0;
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
// --- special debugging function(s) ------------------------------------------
/*
* The following isn't part of the normal programming interface. Rather,
* it exists to validate result types referenced in application programs.
*
* It's used only when:
* 1) the 'XTRA_PROCPS_DEBUG' has been defined, or
* 2) the '#include <proc/xtra-procps-debug.h>' used
*/
PROCPS_EXPORT struct pids_result *xtra_pids_val (
int relative_enum,
const char *typestr,
const struct pids_stack *stack,
struct pids_info *info,
const char *file,
int lineno)
{
char *str;
int i;
for (i = 0; stack->head[i].item < PIDS_logical_end; i++)
;
if (relative_enum < 0 || relative_enum >= i) {
fprintf(stderr, "%s line %d: invalid relative_enum = %d, type = %s\n"
, file, lineno, relative_enum, typestr);
return NULL;
}
str = Item_table[stack->head[relative_enum].item].type2str;
if (str[0]
&& (strcmp(typestr, str))) {
fprintf(stderr, "%s line %d: was %s, expected %s\n", file, lineno, typestr, str);
}
return &stack->head[relative_enum];
} // end: xtra_pids_val
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