process-cpp: /build/process-cpp/src/process-cpp-3.0.1/src/core/posix/linux/proc/process/stat.cpp Source File

process-cpp 3.0.0 A simple convenience library for handling processes in C++11.

stat.cpp
Go to the documentation of this file.
1 /*
2 * Copyright © 2013 Canonical Ltd.
3 *
4 * This program is free software: you can redistribute it and/or modify it
5 * under the terms of the GNU Lesser General Public License version 3,
6 * as published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU Lesser General Public License for more details.
12 *
13 * You should have received a copy of the GNU Lesser General Public License
14 * along with this program. If not, see <http://www.gnu.org/licenses/>.
15 *
16 * Authored by: Thomas Voß <thomas.voss@canonical.com>
17 */
18
19 #include <core/posix/linux/proc/process/stat.h>
20
21 #include <core/posix/process.h>
22
23 #include <fstream>
24 #include <istream>
25 #include <sstream>
26
27 namespace core
28 {
29 namespace posix
30 {
31 namespace linux
32 {
33 namespace proc
34 {
35 namespace process
36 {
37 std::istream& operator>>(std::istream& in, State& state)
38 {
39 char c; in >> c; state = static_cast<State>(c);
40 return in;
41 }
42
43 std::istream& operator>>(std::istream& in, Stat& stat)
44 {
45 in >> stat.pid
46 >> stat.executable
47 >> stat.state
48 >> stat.parent
49 >> stat.process_group
50 >> stat.session_id
51 >> stat.tty_nr
52 >> stat.controlling_process_group
53 >> stat.kernel_flags
54 >> stat.minor_faults_count
55 >> stat.minor_faults_count_by_children
56 >> stat.major_faults_count
57 >> stat.major_faults_count_by_children
58 >> stat.time.user
59 >> stat.time.system
60 >> stat.time.user_for_children
61 >> stat.time.system_for_children
62 >> stat.priority
63 >> stat.nice
64 >> stat.thread_count
65 >> stat.time_before_next_sig_alarm
66 >> stat.start_time
67 >> stat.size.virt
68 >> stat.size.resident_set
69 >> stat.size.resident_set_limit
70 >> stat.addresses.start_code
71 >> stat.addresses.end_code
72 >> stat.addresses.start_stack
73 >> stat.addresses.stack_pointer
74 >> stat.addresses.instruction_pointer
75 >> stat.signals.pending
76 >> stat.signals.blocked
77 >> stat.signals.ignored
78 >> stat.signals.caught
79 >> stat.channel
80 >> stat.swap_count
81 >> stat.swap_count_children
82 >> stat.exit_signal
83 >> stat.cpu_count
84 >> stat.realtime_priority
85 >> stat.scheduling_policy
86 >> stat.aggregated_block_io_delays
87 >> stat.guest_time
88 >> stat.guest_time_children;
89
90 return in;
91 }
92
93 const posix::Process& operator>>(const posix::Process& process, Stat& stat)
94 {
95 std::stringstream ss; ss << "/proc/" << process.pid() << "/stat";
96 std::ifstream in(ss.str());
97
98 in >> stat;
99
100 return process;
101 }
102 }
103 }
104 }
105 }
106 }
core::posix::linux::proc::process::Stat::major_faults_count
long unsigned int major_faults_count
The number of major faults the process has made which have required loading a memory page from disk.
Definition: stat.h:54
core::posix::linux::proc::process::Stat::tty_nr
int tty_nr
The controlling terminal of the process.
Definition: stat.h:49
core::posix::linux::proc::process::Stat::pid
pid_t pid
The process ID.
Definition: stat.h:43
core::posix::linux::proc::process::Stat::cpu_count
int cpu_count
CPU number last executed on.
Definition: stat.h:106
core::posix::linux::proc::process::Stat::realtime_priority
unsigned int realtime_priority
Real-time scheduling priority, a number in the range 1 to 99 for processes scheduled under a real-tim...
Definition: stat.h:107
core::posix::linux::proc::process::Stat::stack_pointer
long unsigned int stack_pointer
The current value of ESP (stack pointer), as found in the kernel stack page for the process.
Definition: stat.h:92
core::posix::linux::proc::process::Stat::channel
long unsigned int channel
This is the "channel" in which the process is waiting. It is the address of a system call,...
Definition: stat.h:102
core::posix::linux::proc::process::Stat::user
long unsigned int user
Amount of time that this process has been scheduled in user mode, [clock ticks].
Definition: stat.h:58
core::posix::linux::proc::process::Stat::guest_time
long unsigned int guest_time
Guest time of the process (time spent running a virtual CPU for a guest operating system),...
Definition: stat.h:110
core::posix::linux::proc::process::Stat::time_before_next_sig_alarm
long int time_before_next_sig_alarm
The time in jiffies before the next SIGALRM is sent to the process due to an interval timer....
Definition: stat.h:79
core::posix::linux::proc::process::Stat::thread_count
long int thread_count
Number of threads in this process (since Linux 2.6).
Definition: stat.h:78
core::posix::linux::proc::process::Stat::major_faults_count_by_children
long unsigned int major_faults_count_by_children
The number of major faults that the process's waited-for children have made.
Definition: stat.h:55
core::posix::linux::proc::process::Stat::resident_set_limit
long unsigned int resident_set_limit
Current soft limit in bytes on the rss of the process; see the description of RLIMIT_RSS in getrlimit...
Definition: stat.h:85
core::posix::linux::proc::process::Stat::guest_time_children
long unsigned int guest_time_children
Guest time of the process's children, measured in clock ticks.
Definition: stat.h:111
core::posix::linux::proc::process::Stat::swap_count
long unsigned int swap_count
Number of pages swapped (not maintained).
Definition: stat.h:103
core::posix::linux::proc::process::Stat
The Stat struct encapsulates status information about a process.
Definition: stat.h:42
core::posix::linux::proc::process::Stat::virt
long unsigned int virt
Virtual memory size in bytes.
Definition: stat.h:83
core::posix::linux::proc::process::Stat::start_time
long int start_time
The time the process started after system boot. In kernels before Linux 2.6, this value was expressed...
Definition: stat.h:80
core::posix::linux::proc::process::Stat::system_for_children
long unsigned int system_for_children
Amount of time that this process's waited-for children have been scheduled in kernel mode,...
Definition: stat.h:61
core::posix::linux::proc::process::Stat::end_code
long unsigned int end_code
The address below which program text can run.
Definition: stat.h:90
core::posix::linux::proc::process::Stat::start_code
long unsigned int start_code
The address above which program text can run.
Definition: stat.h:89
core::posix::linux::proc::process::Stat::size
struct core::posix::linux::proc::process::Stat::@1 size
process.h
core::posix::linux::proc::process::Stat::system
long unsigned int system
Amount of time that this process has been scheduled in kernel mode, [clock ticks].
Definition: stat.h:59
core::posix::linux::proc::process::Stat::pending
long unsigned int pending
The bitmap of pending signals, displayed as a decimal number. Obsolete, because it does not provide i...
Definition: stat.h:97
core::posix::linux::proc::process::Stat::nice
long int nice
The nice value (see setpriority(2)), a value in the range 19 (low priority) to -20 (high priority).
Definition: stat.h:77
core::posix::linux::proc::process::Stat::minor_faults_count_by_children
long unsigned int minor_faults_count_by_children
The number of minor faults that the process's waited-for children have made.
Definition: stat.h:53
core::posix::linux::proc::process::Stat::ignored
long unsigned int ignored
The bitmap of ignored signals, displayed as a decimal number. Obsolete, because it does not provide i...
Definition: stat.h:99
core::posix::linux::proc::process::Stat::state
State state
State of the process.
Definition: stat.h:45
core::posix::linux::proc::process::Stat::caught
long unsigned int caught
The bitmap of caught signals, displayed as a decimal number. Obsolete, because it does not provide in...
Definition: stat.h:100
core::posix::linux::proc::process::Stat::process_group
pid_t process_group
The process group ID of the process.
Definition: stat.h:47
core::posix::linux::proc::process::Stat::scheduling_policy
unsigned int scheduling_policy
Scheduling policy (see sched_setscheduler(2)). Decode using the SCHED_* constants in linux/sched....
Definition: stat.h:108
core::posix::linux::proc::process::Stat::aggregated_block_io_delays
long long unsigned int aggregated_block_io_delays
Aggregated block I/O delays, measured in clock ticks (centiseconds).
Definition: stat.h:109
core::posix::linux::proc::process::Stat::signals
struct core::posix::linux::proc::process::Stat::@3 signals
core
Definition: child_process.h:32
core::posix::linux::proc::process::Stat::priority
long int priority
Definition: stat.h:76
core::posix::linux::proc::process::Stat::minor_faults_count
long unsigned int minor_faults_count
The number of minor faults the process has made which have not required loading a memory page from di...
Definition: stat.h:52
core::posix::Process::pid
virtual pid_t pid() const
Query the pid of the process.
Definition: process.cpp:59
core::posix::linux::proc::process::Stat::session_id
int session_id
The session ID of the process.
Definition: stat.h:48
core::posix::linux::proc::process::State
State
Definition: state.h:36
core::posix::linux::proc::process::Stat::parent
pid_t parent
The PID of the parent.
Definition: stat.h:46
core::posix::linux::proc::process::Stat::blocked
long unsigned int blocked
The bitmap of blocked signals, displayed as a decimal number. Obsolete, because it does not provide i...
Definition: stat.h:98
core::posix::linux::proc::process::Stat::kernel_flags
unsigned int kernel_flags
The kernel flags word of the process.
Definition: stat.h:51
core::posix::linux::proc::process::operator>>
CORE_POSIX_DLL_PUBLIC const posix::Process & operator>>(const posix::Process &process, OomAdj &adj)
Read the OomAdj value for a process instance.
Definition: oom_adj.cpp:55
stat.h
core::posix::linux::proc::process::Stat::start_stack
long unsigned int start_stack
The address of the start (i.e., bottom) of the stack.
Definition: stat.h:91
core::posix::linux::proc::process::Stat::swap_count_children
long unsigned int swap_count_children
Cumulative nswap for child processes (not maintained).
Definition: stat.h:104
core::posix::linux::proc::process::Stat::executable
std::string executable
The filename of the executable, in parentheses.
Definition: stat.h:44
core::posix::linux::proc::process::Stat::exit_signal
int exit_signal
Signal to be sent to parent when we die.
Definition: stat.h:105
core::posix::linux::proc::process::Stat::resident_set
long unsigned int resident_set
Resident Set Size: number of pages the process has in real memory. This is just the pages which count...
Definition: stat.h:84
core::posix::linux::proc::process::Stat::instruction_pointer
long unsigned int instruction_pointer
The current EIP (instruction pointer).
Definition: stat.h:93
core::posix::linux::proc::process::Stat::user_for_children
long unsigned int user_for_children
Amount of time that this process's waited-for children have been scheduled in user mode,...
Definition: stat.h:60
core::posix::linux::proc::process::Stat::addresses
struct core::posix::linux::proc::process::Stat::@2 addresses
core::posix::linux::proc::process::Stat::time
struct core::posix::linux::proc::process::Stat::@0 time
core::posix::Process
The Process class models a process and possible operations on it.
Definition: process.h:45
core::posix::linux::proc::process::Stat::controlling_process_group
int controlling_process_group
The ID of the foreground process group of the controlling terminal of the process.
Definition: stat.h:50