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htop/Process.c
Christian Göttsche 11f558f934 Avoid discarding const qualifiers
2020-08-25 12:00:03 +02:00

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/*
htop - Process.c
(C) 2004-2015 Hisham H. Muhammad
(C) 2020 Red Hat, Inc. All Rights Reserved.
Released under the GNU GPL, see the COPYING file
in the source distribution for its full text.
*/
#include "Process.h"
#include "Settings.h"
#include "config.h"
#include "CRT.h"
#include "StringUtils.h"
#include "RichString.h"
#include "Platform.h"
#include <stdio.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <sys/param.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
#include <stdlib.h>
#include <signal.h>
#include <string.h>
#include <stdbool.h>
#include <pwd.h>
#include <time.h>
#include <assert.h>
#include <math.h>
#ifdef MAJOR_IN_MKDEV
#include <sys/mkdev.h>
#elif defined(MAJOR_IN_SYSMACROS)
#include <sys/sysmacros.h>
#endif
#ifdef __ANDROID__
#define SYS_ioprio_get __NR_ioprio_get
#define SYS_ioprio_set __NR_ioprio_set
#endif
// On Linux, this works only with glibc 2.1+. On earlier versions
// the behavior is similar to have a hardcoded page size.
#ifndef PAGE_SIZE
#define PAGE_SIZE ( sysconf(_SC_PAGESIZE) )
#endif
#define PAGE_SIZE_KB ( PAGE_SIZE / ONE_K )
/*{
#include "Object.h"
#include <sys/types.h>
#define PROCESS_FLAG_IO 0x0001
typedef enum ProcessFields {
NULL_PROCESSFIELD = 0,
PID = 1,
COMM = 2,
STATE = 3,
PPID = 4,
PGRP = 5,
SESSION = 6,
TTY_NR = 7,
TPGID = 8,
MINFLT = 10,
MAJFLT = 12,
PRIORITY = 18,
NICE = 19,
STARTTIME = 21,
PROCESSOR = 38,
M_SIZE = 39,
M_RESIDENT = 40,
ST_UID = 46,
PERCENT_CPU = 47,
PERCENT_MEM = 48,
USER = 49,
TIME = 50,
NLWP = 51,
TGID = 52,
} ProcessField;
typedef struct ProcessPidColumn_ {
int id;
const char* label;
} ProcessPidColumn;
typedef struct Process_ {
Object super;
struct Settings_* settings;
unsigned long long int time;
pid_t pid;
pid_t ppid;
pid_t tgid;
char* comm;
int commLen;
int indent;
int basenameOffset;
bool updated;
char state;
bool tag;
bool showChildren;
bool show;
unsigned int pgrp;
unsigned int session;
unsigned int tty_nr;
int tpgid;
uid_t st_uid;
unsigned long int flags;
int processor;
float percent_cpu;
float percent_mem;
char* user;
long int priority;
long int nice;
long int nlwp;
char starttime_show[8];
time_t starttime_ctime;
long m_size;
long m_resident;
int exit_signal;
unsigned long int minflt;
unsigned long int majflt;
#ifdef DEBUG
long int itrealvalue;
unsigned long int vsize;
long int rss;
unsigned long int rlim;
unsigned long int startcode;
unsigned long int endcode;
unsigned long int startstack;
unsigned long int kstkesp;
unsigned long int kstkeip;
unsigned long int signal;
unsigned long int blocked;
unsigned long int sigignore;
unsigned long int sigcatch;
unsigned long int wchan;
unsigned long int nswap;
unsigned long int cnswap;
#endif
} Process;
typedef struct ProcessFieldData_ {
const char* name;
const char* title;
const char* description;
int flags;
} ProcessFieldData;
// Implemented in platform-specific code:
void Process_writeField(Process* this, RichString* str, ProcessField field);
long Process_compare(const void* v1, const void* v2);
void Process_delete(Object* cast);
bool Process_isThread(Process* this);
extern ProcessFieldData Process_fields[];
extern ProcessPidColumn Process_pidColumns[];
extern char Process_pidFormat[20];
typedef Process*(*Process_New)(struct Settings_*);
typedef void (*Process_WriteField)(Process*, RichString*, ProcessField);
typedef struct ProcessClass_ {
const ObjectClass super;
const Process_WriteField writeField;
} ProcessClass;
#define As_Process(this_) ((ProcessClass*)((this_)->super.klass))
#define Process_getParentPid(process_) (process_->tgid == process_->pid ? process_->ppid : process_->tgid)
#define Process_isChildOf(process_, pid_) (process_->tgid == pid_ || (process_->tgid == process_->pid && process_->ppid == pid_))
#define Process_sortState(state) ((state) == 'I' ? 0x100 : (state))
}*/
static int Process_getuid = -1;
#define ONE_K 1024L
#define ONE_M (ONE_K * ONE_K)
#define ONE_G (ONE_M * ONE_K)
#define ONE_T ((long long)ONE_G * ONE_K)
#define ONE_DECIMAL_K 1000L
#define ONE_DECIMAL_M (ONE_DECIMAL_K * ONE_DECIMAL_K)
#define ONE_DECIMAL_G (ONE_DECIMAL_M * ONE_DECIMAL_K)
#define ONE_DECIMAL_T ((long long)ONE_DECIMAL_G * ONE_DECIMAL_K)
char Process_pidFormat[20] = "%7d ";
static char Process_titleBuffer[20][20];
void Process_setupColumnWidths() {
int maxPid = Platform_getMaxPid();
if (maxPid == -1) return;
int digits = ceil(log10(maxPid));
assert(digits < 20);
for (int i = 0; Process_pidColumns[i].label; i++) {
assert(i < 20);
xSnprintf(Process_titleBuffer[i], 20, "%*s ", digits, Process_pidColumns[i].label);
Process_fields[Process_pidColumns[i].id].title = Process_titleBuffer[i];
}
xSnprintf(Process_pidFormat, sizeof(Process_pidFormat), "%%%dd ", digits);
}
void Process_humanNumber(RichString* str, unsigned long number, bool coloring) {
char buffer[11];
int len;
int largeNumberColor = CRT_colors[LARGE_NUMBER];
int processMegabytesColor = CRT_colors[PROCESS_MEGABYTES];
int processColor = CRT_colors[PROCESS];
if (!coloring) {
largeNumberColor = CRT_colors[PROCESS];
processMegabytesColor = CRT_colors[PROCESS];
}
if(number >= (10 * ONE_DECIMAL_M)) {
#ifdef __LP64__
if(number >= (100 * ONE_DECIMAL_G)) {
len = snprintf(buffer, 10, "%4luT ", number / ONE_G);
RichString_appendn(str, largeNumberColor, buffer, len);
return;
} else if (number >= (1000 * ONE_DECIMAL_M)) {
len = snprintf(buffer, 10, "%4.1lfT ", (double)number / ONE_G);
RichString_appendn(str, largeNumberColor, buffer, len);
return;
}
#endif
if(number >= (100 * ONE_DECIMAL_M)) {
len = snprintf(buffer, 10, "%4luG ", number / ONE_M);
RichString_appendn(str, largeNumberColor, buffer, len);
return;
}
len = snprintf(buffer, 10, "%4.1lfG ", (double)number / ONE_M);
RichString_appendn(str, largeNumberColor, buffer, len);
return;
} else if (number >= 100000) {
len = snprintf(buffer, 10, "%4luM ", number / ONE_K);
RichString_appendn(str, processMegabytesColor, buffer, len);
return;
} else if (number >= 1000) {
len = snprintf(buffer, 10, "%2lu", number/1000);
RichString_appendn(str, processMegabytesColor, buffer, len);
number %= 1000;
len = snprintf(buffer, 10, "%03lu ", number);
RichString_appendn(str, processColor, buffer, len);
return;
}
len = snprintf(buffer, 10, "%5lu ", number);
RichString_appendn(str, processColor, buffer, len);
}
void Process_colorNumber(RichString* str, unsigned long long number, bool coloring) {
char buffer[14];
int largeNumberColor = CRT_colors[LARGE_NUMBER];
int processMegabytesColor = CRT_colors[PROCESS_MEGABYTES];
int processColor = CRT_colors[PROCESS];
int processShadowColor = CRT_colors[PROCESS_SHADOW];
if (!coloring) {
largeNumberColor = CRT_colors[PROCESS];
processMegabytesColor = CRT_colors[PROCESS];
processShadowColor = CRT_colors[PROCESS];
}
if ((long long) number == -1LL) {
int len = snprintf(buffer, 13, " no perm ");
RichString_appendn(str, CRT_colors[PROCESS_SHADOW], buffer, len);
} else if (number >= 100000LL * ONE_DECIMAL_T) {
xSnprintf(buffer, 13, "%11llu ", number / ONE_DECIMAL_G);
RichString_appendn(str, largeNumberColor, buffer, 12);
} else if (number >= 100LL * ONE_DECIMAL_T) {
xSnprintf(buffer, 13, "%11llu ", number / ONE_DECIMAL_M);
RichString_appendn(str, largeNumberColor, buffer, 8);
RichString_appendn(str, processMegabytesColor, buffer+8, 4);
} else if (number >= 10LL * ONE_DECIMAL_G) {
xSnprintf(buffer, 13, "%11llu ", number / ONE_DECIMAL_K);
RichString_appendn(str, largeNumberColor, buffer, 5);
RichString_appendn(str, processMegabytesColor, buffer+5, 3);
RichString_appendn(str, processColor, buffer+8, 4);
} else {
xSnprintf(buffer, 13, "%11llu ", number);
RichString_appendn(str, largeNumberColor, buffer, 2);
RichString_appendn(str, processMegabytesColor, buffer+2, 3);
RichString_appendn(str, processColor, buffer+5, 3);
RichString_appendn(str, processShadowColor, buffer+8, 4);
}
}
void Process_printTime(RichString* str, unsigned long long totalHundredths) {
unsigned long long totalSeconds = totalHundredths / 100;
unsigned long long hours = totalSeconds / 3600;
int minutes = (totalSeconds / 60) % 60;
int seconds = totalSeconds % 60;
int hundredths = totalHundredths - (totalSeconds * 100);
char buffer[11];
if (hours >= 100) {
xSnprintf(buffer, 10, "%7lluh ", hours);
RichString_append(str, CRT_colors[LARGE_NUMBER], buffer);
} else {
if (hours) {
xSnprintf(buffer, 10, "%2lluh", hours);
RichString_append(str, CRT_colors[LARGE_NUMBER], buffer);
xSnprintf(buffer, 10, "%02d:%02d ", minutes, seconds);
} else {
xSnprintf(buffer, 10, "%2d:%02d.%02d ", minutes, seconds, hundredths);
}
RichString_append(str, CRT_colors[DEFAULT_COLOR], buffer);
}
}
static inline void Process_writeCommand(Process* this, int attr, int baseattr, RichString* str) {
int start = RichString_size(str), finish = 0;
char* comm = this->comm;
if (this->settings->highlightBaseName || !this->settings->showProgramPath) {
int i, basename = 0;
for (i = 0; i < this->basenameOffset; i++) {
if (comm[i] == '/') {
basename = i + 1;
} else if (comm[i] == ':') {
finish = i + 1;
break;
}
}
if (!finish) {
if (this->settings->showProgramPath)
start += basename;
else
comm += basename;
finish = this->basenameOffset - basename;
}
finish += start - 1;
}
RichString_append(str, attr, comm);
if (this->settings->highlightBaseName)
RichString_setAttrn(str, baseattr, start, finish);
}
void Process_outputRate(RichString* str, char* buffer, int n, double rate, int coloring) {
int largeNumberColor = CRT_colors[LARGE_NUMBER];
int processMegabytesColor = CRT_colors[PROCESS_MEGABYTES];
int processColor = CRT_colors[PROCESS];
if (!coloring) {
largeNumberColor = CRT_colors[PROCESS];
processMegabytesColor = CRT_colors[PROCESS];
}
if (rate == -1) {
int len = snprintf(buffer, n, " no perm ");
RichString_appendn(str, CRT_colors[PROCESS_SHADOW], buffer, len);
} else if (rate < ONE_K) {
int len = snprintf(buffer, n, "%7.2f B/s ", rate);
RichString_appendn(str, processColor, buffer, len);
} else if (rate < ONE_M) {
int len = snprintf(buffer, n, "%7.2f K/s ", rate / ONE_K);
RichString_appendn(str, processColor, buffer, len);
} else if (rate < ONE_G) {
int len = snprintf(buffer, n, "%7.2f M/s ", rate / ONE_M);
RichString_appendn(str, processMegabytesColor, buffer, len);
} else if (rate < ONE_T) {
int len = snprintf(buffer, n, "%7.2f G/s ", rate / ONE_G);
RichString_appendn(str, largeNumberColor, buffer, len);
} else {
int len = snprintf(buffer, n, "%7.2f T/s ", rate / ONE_T);
RichString_appendn(str, largeNumberColor, buffer, len);
}
}
void Process_writeField(Process* this, RichString* str, ProcessField field) {
char buffer[256]; buffer[255] = '\0';
int attr = CRT_colors[DEFAULT_COLOR];
int baseattr = CRT_colors[PROCESS_BASENAME];
int n = sizeof(buffer) - 1;
bool coloring = this->settings->highlightMegabytes;
switch (field) {
case PERCENT_CPU: {
if (this->percent_cpu > 999.9) {
xSnprintf(buffer, n, "%4u ", (unsigned int)this->percent_cpu);
} else if (this->percent_cpu > 99.9) {
xSnprintf(buffer, n, "%3u. ", (unsigned int)this->percent_cpu);
} else {
xSnprintf(buffer, n, "%4.1f ", this->percent_cpu);
}
break;
}
case PERCENT_MEM: {
if (this->percent_mem > 99.9) {
xSnprintf(buffer, n, "100. ");
} else {
xSnprintf(buffer, n, "%4.1f ", this->percent_mem);
}
break;
}
case COMM: {
if (this->settings->highlightThreads && Process_isThread(this)) {
attr = CRT_colors[PROCESS_THREAD];
baseattr = CRT_colors[PROCESS_THREAD_BASENAME];
}
if (!this->settings->treeView || this->indent == 0) {
Process_writeCommand(this, attr, baseattr, str);
return;
} else {
char* buf = buffer;
int maxIndent = 0;
bool lastItem = (this->indent < 0);
int indent = (this->indent < 0 ? -this->indent : this->indent);
for (int i = 0; i < 32; i++)
if (indent & (1U << i))
maxIndent = i+1;
for (int i = 0; i < maxIndent - 1; i++) {
int written, ret;
if (indent & (1 << i))
ret = snprintf(buf, n, "%s ", CRT_treeStr[TREE_STR_VERT]);
else
ret = snprintf(buf, n, " ");
if (ret < 0 || ret >= n) {
written = n;
} else {
written = ret;
}
buf += written;
n -= written;
}
const char* draw = CRT_treeStr[lastItem ? (this->settings->direction == 1 ? TREE_STR_BEND : TREE_STR_TEND) : TREE_STR_RTEE];
xSnprintf(buf, n, "%s%s ", draw, this->showChildren ? CRT_treeStr[TREE_STR_SHUT] : CRT_treeStr[TREE_STR_OPEN] );
RichString_append(str, CRT_colors[PROCESS_TREE], buffer);
Process_writeCommand(this, attr, baseattr, str);
return;
}
}
case MAJFLT: Process_colorNumber(str, this->majflt, coloring); return;
case MINFLT: Process_colorNumber(str, this->minflt, coloring); return;
case M_RESIDENT: Process_humanNumber(str, this->m_resident * PAGE_SIZE_KB, coloring); return;
case M_SIZE: Process_humanNumber(str, this->m_size * PAGE_SIZE_KB, coloring); return;
case NICE: {
xSnprintf(buffer, n, "%3ld ", this->nice);
attr = this->nice < 0 ? CRT_colors[PROCESS_HIGH_PRIORITY]
: this->nice > 0 ? CRT_colors[PROCESS_LOW_PRIORITY]
: attr;
break;
}
case NLWP: xSnprintf(buffer, n, "%4ld ", this->nlwp); break;
case PGRP: xSnprintf(buffer, n, Process_pidFormat, this->pgrp); break;
case PID: xSnprintf(buffer, n, Process_pidFormat, this->pid); break;
case PPID: xSnprintf(buffer, n, Process_pidFormat, this->ppid); break;
case PRIORITY: {
if(this->priority <= -100)
xSnprintf(buffer, n, " RT ");
else
xSnprintf(buffer, n, "%3ld ", this->priority);
break;
}
case PROCESSOR: xSnprintf(buffer, n, "%3d ", Settings_cpuId(this->settings, this->processor)); break;
case SESSION: xSnprintf(buffer, n, Process_pidFormat, this->session); break;
case STARTTIME: xSnprintf(buffer, n, "%s", this->starttime_show); break;
case STATE: {
xSnprintf(buffer, n, "%c ", this->state);
switch(this->state) {
case 'R':
attr = CRT_colors[PROCESS_R_STATE];
break;
case 'D':
attr = CRT_colors[PROCESS_D_STATE];
break;
}
break;
}
case ST_UID: xSnprintf(buffer, n, "%5d ", this->st_uid); break;
case TIME: Process_printTime(str, this->time); return;
case TGID: xSnprintf(buffer, n, Process_pidFormat, this->tgid); break;
case TPGID: xSnprintf(buffer, n, Process_pidFormat, this->tpgid); break;
case TTY_NR: xSnprintf(buffer, n, "%3u:%3u ", major(this->tty_nr), minor(this->tty_nr)); break;
case USER: {
if (Process_getuid != (int) this->st_uid)
attr = CRT_colors[PROCESS_SHADOW];
if (this->user) {
xSnprintf(buffer, n, "%-9s ", this->user);
} else {
xSnprintf(buffer, n, "%-9d ", this->st_uid);
}
if (buffer[9] != '\0') {
buffer[9] = ' ';
buffer[10] = '\0';
}
break;
}
default:
xSnprintf(buffer, n, "- ");
}
RichString_append(str, attr, buffer);
}
void Process_display(Object* cast, RichString* out) {
Process* this = (Process*) cast;
ProcessField* fields = this->settings->fields;
RichString_prune(out);
for (int i = 0; fields[i]; i++)
As_Process(this)->writeField(this, out, fields[i]);
if (this->settings->shadowOtherUsers && (int)this->st_uid != Process_getuid)
RichString_setAttr(out, CRT_colors[PROCESS_SHADOW]);
if (this->tag == true)
RichString_setAttr(out, CRT_colors[PROCESS_TAG]);
assert(out->chlen > 0);
}
void Process_done(Process* this) {
assert (this != NULL);
free(this->comm);
}
ProcessClass Process_class = {
.super = {
.extends = Class(Object),
.display = Process_display,
.delete = Process_delete,
.compare = Process_compare
},
.writeField = Process_writeField,
};
void Process_init(Process* this, struct Settings_* settings) {
this->settings = settings;
this->tag = false;
this->showChildren = true;
this->show = true;
this->updated = false;
this->basenameOffset = -1;
if (Process_getuid == -1) Process_getuid = getuid();
}
void Process_toggleTag(Process* this) {
this->tag = this->tag == true ? false : true;
}
bool Process_setPriority(Process* this, int priority) {
CRT_dropPrivileges();
int old_prio = getpriority(PRIO_PROCESS, this->pid);
int err = setpriority(PRIO_PROCESS, this->pid, priority);
CRT_restorePrivileges();
if (err == 0 && old_prio != getpriority(PRIO_PROCESS, this->pid)) {
this->nice = priority;
}
return (err == 0);
}
bool Process_changePriorityBy(Process* this, Arg delta) {
return Process_setPriority(this, this->nice + delta.i);
}
bool Process_sendSignal(Process* this, Arg sgn) {
CRT_dropPrivileges();
bool ok = (kill(this->pid, sgn.i) == 0);
CRT_restorePrivileges();
return ok;
}
long Process_pidCompare(const void* v1, const void* v2) {
Process* p1 = (Process*)v1;
Process* p2 = (Process*)v2;
return (p1->pid - p2->pid);
}
long Process_compare(const void* v1, const void* v2) {
Process *p1, *p2;
Settings *settings = ((Process*)v1)->settings;
if (settings->direction == 1) {
p1 = (Process*)v1;
p2 = (Process*)v2;
} else {
p2 = (Process*)v1;
p1 = (Process*)v2;
}
switch (settings->sortKey) {
case PERCENT_CPU:
return (p2->percent_cpu > p1->percent_cpu ? 1 : -1);
case PERCENT_MEM:
return (p2->m_resident - p1->m_resident);
case COMM:
return strcmp(p1->comm, p2->comm);
case MAJFLT:
return (p2->majflt - p1->majflt);
case MINFLT:
return (p2->minflt - p1->minflt);
case M_RESIDENT:
return (p2->m_resident - p1->m_resident);
case M_SIZE:
return (p2->m_size - p1->m_size);
case NICE:
return (p1->nice - p2->nice);
case NLWP:
return (p1->nlwp - p2->nlwp);
case PGRP:
return (p1->pgrp - p2->pgrp);
case PID:
return (p1->pid - p2->pid);
case PPID:
return (p1->ppid - p2->ppid);
case PRIORITY:
return (p1->priority - p2->priority);
case PROCESSOR:
return (p1->processor - p2->processor);
case SESSION:
return (p1->session - p2->session);
case STARTTIME: {
if (p1->starttime_ctime == p2->starttime_ctime)
return (p1->pid - p2->pid);
else
return (p1->starttime_ctime - p2->starttime_ctime);
}
case STATE:
return (Process_sortState(p1->state) - Process_sortState(p2->state));
case ST_UID:
return (p1->st_uid - p2->st_uid);
case TIME:
return ((p2->time) - (p1->time));
case TGID:
return (p1->tgid - p2->tgid);
case TPGID:
return (p1->tpgid - p2->tpgid);
case TTY_NR:
return (p1->tty_nr - p2->tty_nr);
case USER:
return strcmp(p1->user ? p1->user : "", p2->user ? p2->user : "");
default:
return (p1->pid - p2->pid);
}
}
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