htop/Process.h
Explorer09 98cbdc6dca Correct PROCESS_MAX_UID_DIGITS constant
The PROCESS_MAX_UID_DIGITS=19 introduced in
696f79fe50 doesn't make sense.
The `uid_t` type does not require to be signed in POSIX. If we are to
support 64 bits as the maximum size of `uid_t`, then
PROCESS_MAX_UID_DIGITS should be 20. (= floor(log10(UINT64_MAX)) + 1).

Signed-off-by: Kang-Che Sung <explorer09@gmail.com>
2022-05-30 07:50:32 +02:00

422 lines
12 KiB
C

#ifndef HEADER_Process
#define HEADER_Process
/*
htop - Process.h
(C) 2004-2015 Hisham H. Muhammad
(C) 2020 Red Hat, Inc. All Rights Reserved.
Released under the GNU GPLv2+, see the COPYING file
in the source distribution for its full text.
*/
#include <stdbool.h>
#include <stdint.h>
#include <sys/types.h>
#include "Object.h"
#include "ProcessField.h"
#include "RichString.h"
#define PROCESS_FLAG_IO 0x00000001
#define PROCESS_FLAG_CWD 0x00000002
#define DEFAULT_HIGHLIGHT_SECS 5
typedef enum ProcessField_ {
NULL_PROCESSFIELD = 0,
PID = 1,
COMM = 2,
STATE = 3,
PPID = 4,
PGRP = 5,
SESSION = 6,
TTY = 7,
TPGID = 8,
MINFLT = 10,
MAJFLT = 12,
PRIORITY = 18,
NICE = 19,
STARTTIME = 21,
PROCESSOR = 38,
M_VIRT = 39,
M_RESIDENT = 40,
ST_UID = 46,
PERCENT_CPU = 47,
PERCENT_MEM = 48,
USER = 49,
TIME = 50,
NLWP = 51,
TGID = 52,
PERCENT_NORM_CPU = 53,
ELAPSED = 54,
PROC_COMM = 124,
PROC_EXE = 125,
CWD = 126,
/* Platform specific fields, defined in ${platform}/ProcessField.h */
PLATFORM_PROCESS_FIELDS
/* Do not add new fields after this entry (dynamic entries follow) */
LAST_PROCESSFIELD
} ProcessField;
/* Core process states (shared by platforms)
* NOTE: The enum has an ordering that is important!
* See processStateChar in process.c for ProcessSate -> letter mapping */
typedef enum ProcessState_ {
UNKNOWN = 1,
RUNNABLE,
RUNNING,
QUEUED,
WAITING,
UNINTERRUPTIBLE_WAIT,
BLOCKED,
PAGING,
STOPPED,
TRACED,
ZOMBIE,
DEFUNCT,
IDLE,
SLEEPING
} ProcessState;
struct Settings_;
/* Holds information about regions of the cmdline that should be
* highlighted (e.g. program basename, delimiter, comm). */
typedef struct ProcessCmdlineHighlight_ {
size_t offset; /* first character to highlight */
size_t length; /* How many characters to highlight, zero if unused */
int attr; /* The attributes used to highlight */
int flags; /* Special flags used for selective highlighting, zero for always */
} ProcessCmdlineHighlight;
/* ProcessMergedCommand is populated by Process_makeCommandStr: It
* contains the merged Command string, and the information needed by
* Process_writeCommand to color the string. str will be NULL for kernel
* threads and zombies */
typedef struct ProcessMergedCommand_ {
char* str; /* merged Command string */
size_t highlightCount; /* how many portions of cmdline to highlight */
ProcessCmdlineHighlight highlights[8]; /* which portions of cmdline to highlight */
bool cmdlineChanged : 1; /* whether cmdline changed */
bool exeChanged : 1; /* whether exe changed */
bool commChanged : 1; /* whether comm changed */
bool prevMergeSet : 1; /* whether showMergedCommand was set */
bool prevPathSet : 1; /* whether showProgramPath was set */
bool prevCommSet : 1; /* whether findCommInCmdline was set */
bool prevCmdlineSet : 1; /* whether stripExeFromCmdline was set */
bool prevShowThreadNames : 1; /* whether showThreadNames was set */
} ProcessMergedCommand;
typedef struct Process_ {
/* Super object for emulated OOP */
Object super;
/* Pointer to quasi-global data structures */
const struct ProcessList_* processList;
const struct Settings_* settings;
/* Process identifier */
pid_t pid;
/* Parent process identifier */
pid_t ppid;
/* Thread group identifier */
pid_t tgid;
/* Process group identifier */
int pgrp;
/* Session identifier */
int session;
/* Foreground group identifier of the controlling terminal */
int tpgid;
/* This is a kernel (helper) task */
bool isKernelThread;
/* This is a userland thread / LWP */
bool isUserlandThread;
/* Controlling terminal identifier of the process */
unsigned long int tty_nr;
/* Controlling terminal name of the process */
char* tty_name;
/* User identifier */
uid_t st_uid;
/* User name */
const char* user;
/* Process runtime (in hundredth of a second) */
unsigned long long int time;
/*
* Process name including arguments.
* Use Process_getCommand() for Command actually displayed.
*/
char* cmdline;
/* End Offset in cmdline of the process basename */
int cmdlineBasenameEnd;
/* Start Offset in cmdline of the process basename */
int cmdlineBasenameStart;
/* The process' "command" name */
char* procComm;
/* The main process executable */
char* procExe;
/* The process/thread working directory */
char* procCwd;
/* Offset in procExe of the process basename */
int procExeBasenameOffset;
/* Tells if the executable has been replaced in the filesystem since start */
bool procExeDeleted;
/* Tells if the process uses replaced shared libraries since start */
bool usesDeletedLib;
/* CPU number last executed on */
int processor;
/* CPU usage during last cycle (in percent) */
float percent_cpu;
/* Memory usage during last cycle (in percent) */
float percent_mem;
/* Scheduling priority */
long int priority;
/* Nice value */
long int nice;
/* Number of threads in this process */
long int nlwp;
/* Process start time (in seconds elapsed since the Epoch) */
time_t starttime_ctime;
/* Process start time (cached formatted string) */
char starttime_show[8];
/* Total program size (in kilobytes) */
long m_virt;
/* Resident set size (in kilobytes) */
long m_resident;
/* Number of minor faults the process has made which have not required loading a memory page from disk */
unsigned long int minflt;
/* Number of major faults the process has made which have required loading a memory page from disk */
unsigned long int majflt;
/* Process state enum field (platform dependent) */
ProcessState state;
/* Whether the process was updated during the current scan */
bool updated;
/* Whether the process was tagged by the user */
bool tag;
/* Whether to display this process */
bool show;
/* Whether this process was shown last cycle */
bool wasShown;
/* Whether to show children of this process in tree-mode */
bool showChildren;
/*
* Internal time counts for showing new and exited processes.
*/
uint64_t seenStampMs;
uint64_t tombStampMs;
/*
* Internal state for tree-mode.
*/
int indent;
unsigned int tree_depth;
/* Has no known parent process */
bool isRoot;
/*
* Internal state for merged Command display
*/
ProcessMergedCommand mergedCommand;
} Process;
typedef struct ProcessFieldData_ {
/* Name (displayed in setup menu) */
const char* name;
/* Title (display in main screen); must have same width as the printed values */
const char* title;
/* Description (displayed in setup menu) */
const char* description;
/* Scan flag to enable scan-method otherwise not run */
uint32_t flags;
/* Whether the values are process identifiers; adjusts the width of title and values if true */
bool pidColumn;
/* Whether the column should be sorted in descending order by default */
bool defaultSortDesc;
/* Whether the column width is dynamically adjusted (the minimum width is determined by the title length) */
bool autoWidth;
} ProcessFieldData;
// Implemented in platform-specific code:
void Process_writeField(const Process* this, RichString* str, ProcessField field);
int Process_compare(const void* v1, const void* v2);
void Process_delete(Object* cast);
extern const ProcessFieldData Process_fields[LAST_PROCESSFIELD];
extern uint8_t Process_fieldWidths[LAST_PROCESSFIELD];
#define PROCESS_MIN_PID_DIGITS 5
#define PROCESS_MAX_PID_DIGITS 19
#define PROCESS_MIN_UID_DIGITS 5
#define PROCESS_MAX_UID_DIGITS 20
extern int Process_pidDigits;
extern int Process_uidDigits;
typedef Process* (*Process_New)(const struct Settings_*);
typedef void (*Process_WriteField)(const Process*, RichString*, ProcessField);
typedef int (*Process_CompareByKey)(const Process*, const Process*, ProcessField);
typedef struct ProcessClass_ {
const ObjectClass super;
const Process_WriteField writeField;
const Process_CompareByKey compareByKey;
} ProcessClass;
#define As_Process(this_) ((const ProcessClass*)((this_)->super.klass))
#define Process_compareByKey(p1_, p2_, key_) (As_Process(p1_)->compareByKey ? (As_Process(p1_)->compareByKey(p1_, p2_, key_)) : Process_compareByKey_Base(p1_, p2_, key_))
static inline pid_t Process_getParentPid(const Process* this) {
return this->tgid == this->pid ? this->ppid : this->tgid;
}
static inline bool Process_isChildOf(const Process* this, pid_t pid) {
return pid == Process_getParentPid(this);
}
static inline bool Process_isKernelThread(const Process* this) {
return this->isKernelThread;
}
static inline bool Process_isUserlandThread(const Process* this) {
return this->isUserlandThread;
}
static inline bool Process_isThread(const Process* this) {
return Process_isUserlandThread(this) || Process_isKernelThread(this);
}
#define CMDLINE_HIGHLIGHT_FLAG_SEPARATOR 0x00000001
#define CMDLINE_HIGHLIGHT_FLAG_BASENAME 0x00000002
#define CMDLINE_HIGHLIGHT_FLAG_COMM 0x00000004
#define CMDLINE_HIGHLIGHT_FLAG_DELETED 0x00000008
#define ONE_K 1024UL
#define ONE_M (ONE_K * ONE_K)
#define ONE_G (ONE_M * ONE_K)
#define ONE_T (1ULL * ONE_G * ONE_K)
#define ONE_P (1ULL * ONE_T * ONE_K)
#define ONE_DECIMAL_K 1000UL
#define ONE_DECIMAL_M (ONE_DECIMAL_K * ONE_DECIMAL_K)
#define ONE_DECIMAL_G (ONE_DECIMAL_M * ONE_DECIMAL_K)
#define ONE_DECIMAL_T (1ULL * ONE_DECIMAL_G * ONE_DECIMAL_K)
#define ONE_DECIMAL_P (1ULL * ONE_DECIMAL_T * ONE_DECIMAL_K)
void Process_setupColumnWidths(void);
/* Sets the size of the UID column based on the passed UID */
void Process_setUidColumnWidth(uid_t maxUid);
/* Takes number in bytes (base 1024). Prints 6 columns. */
void Process_printBytes(RichString* str, unsigned long long number, bool coloring);
/* Takes number in kilo bytes (base 1024). Prints 6 columns. */
void Process_printKBytes(RichString* str, unsigned long long number, bool coloring);
/* Takes number as count (base 1000). Prints 12 columns. */
void Process_printCount(RichString* str, unsigned long long number, bool coloring);
/* Takes time in hundredths of a seconds. Prints 9 columns. */
void Process_printTime(RichString* str, unsigned long long totalHundredths, bool coloring);
/* Takes rate in bare unit (base 1024) per second. Prints 12 columns. */
void Process_printRate(RichString* str, double rate, bool coloring);
void Process_fillStarttimeBuffer(Process* this);
void Process_printLeftAlignedField(RichString* str, int attr, const char* content, unsigned int width);
void Process_printPercentage(float val, char* buffer, int n, uint8_t width, int* attr);
void Process_display(const Object* cast, RichString* out);
void Process_done(Process* this);
extern const ProcessClass Process_class;
void Process_init(Process* this, const struct Settings_* settings);
void Process_toggleTag(Process* this);
bool Process_isNew(const Process* this);
bool Process_isTomb(const Process* this);
bool Process_setPriority(Process* this, int priority);
bool Process_changePriorityBy(Process* this, Arg delta);
bool Process_sendSignal(Process* this, Arg sgn);
static inline int Process_pidEqualCompare(const void* v1, const void* v2) {
const pid_t p1 = ((const Process*)v1)->pid;
const pid_t p2 = ((const Process*)v2)->pid;
return p1 != p2; /* return zero when equal */
}
int Process_compareByKey_Base(const Process* p1, const Process* p2, ProcessField key);
const char* Process_getCommand(const Process* this);
void Process_updateComm(Process* this, const char* comm);
void Process_updateCmdline(Process* this, const char* cmdline, int basenameStart, int basenameEnd);
void Process_updateExe(Process* this, const char* exe);
/* This function constructs the string that is displayed by
* Process_writeCommand and also returned by Process_getCommand */
void Process_makeCommandStr(Process* this);
void Process_writeCommand(const Process* this, int attr, int baseAttr, RichString* str);
void Process_resetFieldWidths(void);
void Process_updateFieldWidth(ProcessField key, size_t width);
void Process_updateCPUFieldWidths(float percentage);
#endif