docs: Start documenting the pids API
Started with procps_pids_new() and documenting this function as well as the enum used in this function.
This commit is contained in:
Craig Small
parent
b4d21c74ac
commit
4217eddf47
@ -54,7 +54,9 @@ dist_man_MANS = \
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vmstat.8 \
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w.1 \
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ps/ps.1 \
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doc/libproc.3 \
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doc/procps_linux_version.3 \
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doc/procps_pids_new.3 \
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doc/procps_uptime.3 \
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doc/procps_uptime_sprint.3 \
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doc/procps_uptime_sprint_short.3
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323
doc/libproc.3
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323
doc/libproc.3
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@ -0,0 +1,323 @@
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.\" (C) Copyright 2016 Craig Small <csmall@enc.com.au>
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.\"
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.\" %%%LICENSE_START(LGPL_2.1+)
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.\" This manual is free software; you can redistribute it and/or
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.\" modify it under the terms of the GNU Lesser General Public
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.\" License as published by the Free Software Foundation; either
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.\" version 2.1 of the License, or (at your option) any later version.
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.\"
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.\" This manual is distributed in the hope that it will be useful,
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.\" but WITHOUT ANY WARRANTY; without even the implied warranty of
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.\" MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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.\" Lesser General Public License for more details.
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.\"
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.\" You should have received a copy of the GNU Lesser General Public
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.\" License along with this library; if not, write to the Free Software
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.\" Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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.\" %%%LICENSE_END
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.\"
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.TH LIBPROC 3 2016-04-18 "libproc-2"
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.\" Please adjust this date whenever revising the manpage.
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.\"
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.SH NAME
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libproc \-
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Miscelleanous information about libproc
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.SH SYNOPSIS
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.B #include <proc/procps.h>
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Link with \fI\-lprocps\fR.
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.SH DESCRIPTION
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This manual describes some of the anciallary information about the
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libproc library.
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.SS PID ITEMS
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The enum \fIpids_item\fR is used by the functions
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.BR procps_pids_new (3),
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.BR procps_pids_reset "(3) and"
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.BR procps_pids_sort (3).
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The following items can be fetched for a process:
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.TP
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.B PROCPS_PIDS_ADDR_END_CODE
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?
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.TP
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.B PROCPS_PIDS_ADDR_KSTK_EIP
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Instruction pointer.
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.TP
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.B PROCPS_PIDS_ADDR_KSTK_ESP
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Stack pointer.
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.TP
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.B PROCPS_PIDS_ADDR_START_CODE
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?
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.TP
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.B PROCPS_PIDS_ADDR_START_STACK
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Address of the start (bottom) of the stack.
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.TP
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.B PROCPS_PIDS_ALARM
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?
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.TP
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.B PROCPS_PIDS_CGNAME
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The name of the control group for the process.
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.TP
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.B PROCPS_PIDS_CGROUP, PROCPS_PIDS_CGROUP_V
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List of control groups the process belongs to as a string or string vector.
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.TP
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.B PROCPS_PIDS_CMD
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Command name (only the executable name).
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.TP
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.B PROCPS_PIDS_CMDLINE, PROCPS_PIDS_CMDLINE_V
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Full command line as a string or string vector.
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.TP
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.B PROCPS_PIDS_ENVIRON, PROCPS_PIDS_ENVIRON_V
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The processes environment as a string or string vector.
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.TP
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.B PROCPS_PIDS_EXIT_SIGNAL
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?
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.TP
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.B PROCPS_PIDS_FLAGS
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Process flags.
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.TP
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.B PROCPS_PIDS_FLT_MAJ
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Number of major page faults.
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.TP
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.B PROCPS_PIDS_FLT_MAJ_C
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Cumulative major page faults.
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.TP
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.B PROCPS_PIDS_FLT_MAJ_DELTA
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Number of major page faults since last fetch.
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.TP
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.B PROCPS_PIDS_FLT_MIN
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Number of minor page faults.
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.TP
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.B PROCPS_PIDS_FLT_MIN_C
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Culmative minor page faults.
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.TP
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.B PROCPS_PIDS_FLT_MIN_DELTA
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Number of minor page faults since last fetch.
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.TP
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.B PROCPS_PIDS_ID_EGID, PROCPS_PIDS_ID_EGROUP
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Effective group as a ID number or name.
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.TP
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.B PROCPS_PIDS_ID_EUID, PROCPS_PIDS_ID_EUSER
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Effective user ID number or name.
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.TP
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.B PROCPS_PIDS_ID_FGID, PROCPS_PIDS_ID_FGROUP
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File system access group ID number or name.
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.TP
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.B PROCPS_PIDS_ID_FUID, PROCPS_PIDS_ID_FUSER
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File sytem access user ID number or name.
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.TP
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.B PROCPS_PIDS_ID_PGRP
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Process group ID, or process ID of group leader.
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.TP
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.B PROCPS_PIDS_ID_PID
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Proccess ID number.
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.TP
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.B PROCPS_PIDS_ID_PPID
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Process ID number of parent.
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.TP
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.B PROCPS_PIDS_ID_RGID, PROCPS_PIDS_ID_RGROUP
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Real group ID number or name.
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.TP
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.B PROCPS_PIDS_ID_RUID, PROCPS_PIDS_ID_RUSER
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Real user ID number or name.
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.TP
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.B PROCPS_PIDS_ID_SESSION
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Session ID number, or process ID of session leader.
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.TP
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.B PROCPS_PIDS_ID_SGID, PROCPS_PIDS_ID_SGROUP
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Saved group ID number or name.
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.TP
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.B PROCPS_PIDS_ID_SUID, PROCPS_PIDS_ID_SUSER
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Saved user ID number or name.
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.TP
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.B PROCPS_PIDS_ID_TGID
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Thread group ID number, or process ID of thread group leader.
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.TP
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.B PROCPS_PIDS_ID_TPGID
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Process ID of foreground process group on the tty.
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.TP
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.B PROCPS_PIDS_LXCNAME
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Linux container name.
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.TP
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.B PROCPS_PIDS_MEM_CODE
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?
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.TP
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.B PROCPS_PIDS_MEM_CODE_KIB
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?
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.TP
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.B PROCPS_PIDS_MEM_DATA
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?
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.TP
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.B PROCPS_PIDS_MEM_DATA_KIB
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?
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.TP
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.B PROCPS_PIDS_MEM_DT
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?
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.TP
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.B PROCPS_PIDS_MEM_LRS
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?
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.TP
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.B PROCPS_PIDS_MEM_RES
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Resident set size
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.TP
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.B PROCPS_PIDS_MEM_RES_KIB
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Resident set size
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.TP
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.B PROCPS_PIDS_MEM_SHR
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Shared memory
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.TP
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.B PROCPS_PIDS_MEM_SHR_KIB
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Shared memory
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.TP
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.B PROCPS_PIDS_MEM_VIRT
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Virtual memory.
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.TP
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.B PROCPS_PIDS_MEM_VIRT_KIB
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Virtual memory.
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.TP
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.B PROCPS_PIDS_NICE
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Nice value.
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.TP
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.B PROCPS_PIDS_NLWP
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Number of lwps (threads) in the process.
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.TP
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.B PROCPS_PIDS_NS_IPC, PROCPS_PIDS_NS_MNT, PROCPS_PIDS_NS_NET, PROCPS_PIDS_NS_PID, PROCPS_PIDS_NS_USER, PROCPS_PIDS_NS_UTS
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IDs of the current namespaces for IPC, mount, network, PID, user or UTS.
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See
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.B user_namespaces (7)
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for further information on these items.
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.TP
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.B PROCPS_PIDS_OOM_ADJ
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?
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.TP
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.B PROCPS_PIDS_OOM_SCORE
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?
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.TP
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.B PROCPS_PIDS_PRIORITY
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Kernel scheduling priority.
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.TP
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.B PROCPS_PIDS_PROCESSOR
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Current CPU the process is running on.
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.TP
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.B PROCPS_PIDS_RSS
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Resident set size.
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.TP
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.B PROCPS_PIDS_RSS_RLIM
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?
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.TP
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.B PROCPS_PIDS_RTPRIO
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Realtime priority.
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.TP
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.B PROCPS_PIDS_SCHED_CLASS
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Scheduling class, see
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.BR sched (7).
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.TP
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.B PROCPS_PIDS_SD_MACH, PROCPS_PIDS_SD_OUID, PROCPS_PIDS_SD_SEAT, PROCPS_PIDS_SD_SESS, PROCPS_PIDS_SD_SLICE, PROCPS_PIDS_SD_UNIT, PROCPS_PIDS_SD_UUNIT
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The systemd machine name, owner user ID, seat, session, slice, unit or user unit; see
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.BR sd_pid_get_session (3).
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.TP
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.B PROCPS_PIDS_SIGBLOCKED
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?
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.TP
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.B PROCPS_PIDS_SIGCATCH
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?
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.TP
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.B PROCPS_PIDS_SIGIGNORE
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?
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.TP
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.B PROCPS_PIDS_SIGNALS
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?
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.TP
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.B PROCPS_PIDS_SIGPENDING
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?
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.TP
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.B PROCPS_PIDS_STATE
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Process state codes.
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.TP
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.B PROCPS_PIDS_SUPGIDS, PROCPS_PIDS_SUPGROUPS
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IDs or names of the supplementary groups.
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.TP
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.B PROCPS_PIDS_TICS_ALL
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Sum of user and system time.
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.TP
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.B PROCPS_PIDS_TICS_ALL_C
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Cumulative sum of user and system time.
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.TP
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.B PROCPS_PIDS_TICS_DELTA
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Difference of sum of user and system time since last fetch.
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.TP
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.B PROCPS_PIDS_TICS_SYSTEM
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?
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.TP
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.B PROCPS_PIDS_TICS_SYSTEM_C
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?
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.TP
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.B PROCPS_PIDS_TICS_USER
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?
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.TP
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.B PROCPS_PIDS_TICS_USER_C
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?
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.TP
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.B PROCPS_PIDS_TIME_ALL
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?
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.TP
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.B PROCPS_PIDS_TIME_ELAPSED
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Total seconds since process started.
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.TP
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.B PROCPS_PIDS_TIME_START
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Time the process started.
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.TP
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.B PROCPS_PIDS_TTY, PROCPS_PIDS_TTY_NAME, PROCPS_PIDS_TTY_NUMBER
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Controlling terminal as a ID, name or number
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.TP
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.B PROCPS_PIDS_VM_DATA
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?
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.TP
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.B PROCPS_PIDS_VM_EXE
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?
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.TP
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.B PROCPS_PIDS_VM_LIB
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?
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.TP
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.B PROCPS_PIDS_VM_LOCK
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?
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.TP
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.B PROCPS_PIDS_VM_RSS
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?
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.TP
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.B PROCPS_PIDS_VM_RSS_ANON
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?
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.TP
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.B PROCPS_PIDS_VM_RSS_FILE
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?
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.TP
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.B PROCPS_PIDS_VM_RSS_LOCKED
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?
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.TP
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.B PROCPS_PIDS_VM_RSS_SHARED
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?
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.TP
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.B PROCPS_PIDS_VM_SIZE
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?
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.TP
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.B PROCPS_PIDS_VM_STACK
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?
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.TP
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.B PROCPS_PIDS_VM_SWAP
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?
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.TP
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.B PROCPS_PIDS_VM_USED
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?
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.TP
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.B PROCPS_PIDS_VSIZE_PGS
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?
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.TP
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.B PROCPS_PIDS_WCHAN_ADDR, PROCPS_PIDS_WCHAN_NAME
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Address or name of the kernel function in which the process is sleeping.
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.SH SEE ALSO
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.BR proc (5),
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.BR sched (7),
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.BR user_namespaces (7).
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72
doc/procps_pids_new.3
Normal file
72
doc/procps_pids_new.3
Normal file
@ -0,0 +1,72 @@
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.\" (C) Copyright 2016 Craig Small <csmall@enc.com.au>
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.\"
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.\" %%%LICENSE_START(LGPL_2.1+)
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.\" This manual is free software; you can redistribute it and/or
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.\" modify it under the terms of the GNU Lesser General Public
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||||
.\" License as published by the Free Software Foundation; either
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.\" version 2.1 of the License, or (at your option) any later version.
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.\"
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.\" This manual is distributed in the hope that it will be useful,
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||||
.\" but WITHOUT ANY WARRANTY; without even the implied warranty of
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.\" MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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||||
.\" Lesser General Public License for more details.
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.\"
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.\" You should have received a copy of the GNU Lesser General Public
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.\" License along with this library; if not, write to the Free Software
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.\" Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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.\" %%%LICENSE_END
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.\"
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.TH PROCPS_PIDS_NEW 3 2016-04-18 "libproc-2"
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.\" Please adjust this date whenever revising the manpage.
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.\"
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.SH NAME
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procps_pids_new \-
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Create a PID information structure
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.SH SYNOPSIS
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.B #include <proc/procps.h>
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.sp
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.BI "int procps_pids_new(struct procps_pidsinfo **" info ", int " maxitems ", enum pids_item *" items ");"
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.sp
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Link with \fI\-lprocps\fP.
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.SH DESCRIPTION
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.BR procps_pids_new ()
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creates a new PID information structure that be used in subsequent calls to
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.BR procps_pids_read_open (3),
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.BR procps_pids_reset (3),
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.BR procps_pids_sort (3).
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functions. The pointer to \fIinfo\fR will have memory allocated and a structure
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created.
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\fIitems\fR is an array of enums up to \fImaxitems\fR long that selects what
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information about the processed will be stored. \fImaxitems\fR is used to
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allocate memory and must be at least the length of \fIitems\fR but can be more.
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For information about what \fIitems\fR can contain, see the \fBPID ITEMS\fR
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section in
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.BR libproc (3).
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Once the structure is no longer required,
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.BR procps_pids_unref (3)
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should be used to free it.
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.SH RETURN VALUE
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The function returns 0 on success and one of negative values below
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on failure.
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.TP
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.B -EINVAL
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One of the given parameters is incorrect.
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.TP
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.B -ENOMEM
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Unable to allocate memory for the structure.
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.SH VERSIONS
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.B procps_pids_new()
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first appeared in libproc-2 version 0.0.
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.SH SEE ALSO
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.BR libproc (3),
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.BR procps_pids_read_open (3),
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.BR procps_pids_reset (3),
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.BR procps_pids_sort (3),
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.BR procps_pids_unref (3),
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.BR proc (5).
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Block a user