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htop/Process.c

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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 GPLv2+, see the COPYING file
in the source distribution for its full text.
*/
#include "config.h" // IWYU pragma: keep
#include "Process.h"
#include <assert.h>
#include <limits.h>
#include <math.h>
#include <signal.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include <sys/resource.h>
#include "CRT.h"
#include "Macros.h"
#include "Platform.h"
#include "ProcessList.h"
#include "DynamicColumn.h"
#include "RichString.h"
#include "Settings.h"
#include "XUtils.h"
#if defined(MAJOR_IN_MKDEV)
#include <sys/mkdev.h>
#endif
/* Used to identify kernel threads in Comm and Exe columns */
static const char* const kthreadID = "KTHREAD";
static uid_t Process_getuid = (uid_t)-1;
int Process_pidDigits = PROCESS_MIN_PID_DIGITS;
int Process_uidDigits = PROCESS_MIN_UID_DIGITS;
void Process_setupColumnWidths() {
int maxPid = Platform_getMaxPid();
if (maxPid == -1)
return;
if (maxPid < (int)pow(10, PROCESS_MIN_PID_DIGITS)) {
Process_pidDigits = PROCESS_MIN_PID_DIGITS;
return;
}
Process_pidDigits = ceil(log10(maxPid));
assert(Process_pidDigits <= PROCESS_MAX_PID_DIGITS);
}
void Process_setUidColumnWidth(uid_t maxUid) {
if (maxUid < (uid_t)pow(10, PROCESS_MIN_UID_DIGITS)) {
Process_uidDigits = PROCESS_MIN_UID_DIGITS;
return;
}
Process_uidDigits = ceil(log10(maxUid));
assert(Process_uidDigits <= PROCESS_MAX_UID_DIGITS);
}
void Process_printBytes(RichString* str, unsigned long long number, bool coloring) {
char buffer[16];
int len;
int largeNumberColor = coloring ? CRT_colors[LARGE_NUMBER] : CRT_colors[PROCESS];
int processMegabytesColor = coloring ? CRT_colors[PROCESS_MEGABYTES] : CRT_colors[PROCESS];
int processGigabytesColor = coloring ? CRT_colors[PROCESS_GIGABYTES] : CRT_colors[PROCESS];
int shadowColor = coloring ? CRT_colors[PROCESS_SHADOW] : CRT_colors[PROCESS];
int processColor = CRT_colors[PROCESS];
if (number == ULLONG_MAX) {
//Invalid number
RichString_appendAscii(str, shadowColor, " N/A ");
return;
}
number /= ONE_K;
if (number < 1000) {
//Plain number, no markings
len = xSnprintf(buffer, sizeof(buffer), "%5llu ", number);
RichString_appendnAscii(str, processColor, buffer, len);
} else if (number < 100000) {
//2 digit MB, 3 digit KB
len = xSnprintf(buffer, sizeof(buffer), "%2llu", number / 1000);
RichString_appendnAscii(str, processMegabytesColor, buffer, len);
number %= 1000;
len = xSnprintf(buffer, sizeof(buffer), "%03llu ", number);
RichString_appendnAscii(str, processColor, buffer, len);
} else if (number < 1000 * ONE_K) {
//3 digit MB
number /= ONE_K;
len = xSnprintf(buffer, sizeof(buffer), "%4lluM ", number);
RichString_appendnAscii(str, processMegabytesColor, buffer, len);
} else if (number < 10000 * ONE_K) {
//1 digit GB, 3 digit MB
number /= ONE_K;
len = xSnprintf(buffer, sizeof(buffer), "%1llu", number / 1000);
RichString_appendnAscii(str, processGigabytesColor, buffer, len);
number %= 1000;
len = xSnprintf(buffer, sizeof(buffer), "%03lluM ", number);
RichString_appendnAscii(str, processMegabytesColor, buffer, len);
} else if (number < 100000 * ONE_K) {
//2 digit GB, 1 digit MB
number /= 100 * ONE_K;
len = xSnprintf(buffer, sizeof(buffer), "%2llu", number / 10);
RichString_appendnAscii(str, processGigabytesColor, buffer, len);
number %= 10;
len = xSnprintf(buffer, sizeof(buffer), ".%1llu", number);
RichString_appendnAscii(str, processMegabytesColor, buffer, len);
RichString_appendAscii(str, processGigabytesColor, "G ");
} else if (number < 1000 * ONE_M) {
//3 digit GB
number /= ONE_M;
len = xSnprintf(buffer, sizeof(buffer), "%4lluG ", number);
RichString_appendnAscii(str, processGigabytesColor, buffer, len);
} else if (number < 10000ULL * ONE_M) {
//1 digit TB, 3 digit GB
number /= ONE_M;
len = xSnprintf(buffer, sizeof(buffer), "%1llu", number / 1000);
RichString_appendnAscii(str, largeNumberColor, buffer, len);
number %= 1000;
len = xSnprintf(buffer, sizeof(buffer), "%03lluG ", number);
RichString_appendnAscii(str, processGigabytesColor, buffer, len);
} else if (number < 100000 * ONE_M) {
//2 digit TB, 1 digit GB
number /= 100 * ONE_M;
len = xSnprintf(buffer, sizeof(buffer), "%2llu", number / 10);
RichString_appendnAscii(str, largeNumberColor, buffer, len);
number %= 10;
len = xSnprintf(buffer, sizeof(buffer), ".%1llu", number);
RichString_appendnAscii(str, processGigabytesColor, buffer, len);
RichString_appendAscii(str, largeNumberColor, "T ");
} else if (number < 10000ULL * ONE_G) {
//3 digit TB or 1 digit PB, 3 digit TB
number /= ONE_G;
len = xSnprintf(buffer, sizeof(buffer), "%4lluT ", number);
RichString_appendnAscii(str, largeNumberColor, buffer, len);
} else {
//2 digit PB and above
len = xSnprintf(buffer, sizeof(buffer), "%4.1lfP ", (double)number / ONE_T);
RichString_appendnAscii(str, largeNumberColor, buffer, len);
}
}
void Process_printKBytes(RichString* str, unsigned long long number, bool coloring) {
if (number == ULLONG_MAX)
Process_printBytes(str, ULLONG_MAX, coloring);
else
Process_printBytes(str, number * ONE_K, coloring);
}
void Process_printCount(RichString* str, unsigned long long number, bool coloring) {
char buffer[13];
int largeNumberColor = coloring ? CRT_colors[LARGE_NUMBER] : CRT_colors[PROCESS];
int processMegabytesColor = coloring ? CRT_colors[PROCESS_MEGABYTES] : CRT_colors[PROCESS];
int processColor = CRT_colors[PROCESS];
int processShadowColor = coloring ? CRT_colors[PROCESS_SHADOW] : CRT_colors[PROCESS];
if (number == ULLONG_MAX) {
RichString_appendAscii(str, CRT_colors[PROCESS_SHADOW], " N/A ");
} else if (number >= 100000LL * ONE_DECIMAL_T) {
xSnprintf(buffer, sizeof(buffer), "%11llu ", number / ONE_DECIMAL_G);
RichString_appendnAscii(str, largeNumberColor, buffer, 12);
} else if (number >= 100LL * ONE_DECIMAL_T) {
xSnprintf(buffer, sizeof(buffer), "%11llu ", number / ONE_DECIMAL_M);
RichString_appendnAscii(str, largeNumberColor, buffer, 8);
RichString_appendnAscii(str, processMegabytesColor, buffer + 8, 4);
} else if (number >= 10LL * ONE_DECIMAL_G) {
xSnprintf(buffer, sizeof(buffer), "%11llu ", number / ONE_DECIMAL_K);
RichString_appendnAscii(str, largeNumberColor, buffer, 5);
RichString_appendnAscii(str, processMegabytesColor, buffer + 5, 3);
RichString_appendnAscii(str, processColor, buffer + 8, 4);
} else {
xSnprintf(buffer, sizeof(buffer), "%11llu ", number);
RichString_appendnAscii(str, largeNumberColor, buffer, 2);
RichString_appendnAscii(str, processMegabytesColor, buffer + 2, 3);
RichString_appendnAscii(str, processColor, buffer + 5, 3);
RichString_appendnAscii(str, processShadowColor, buffer + 8, 4);
}
}
void Process_printTime(RichString* str, unsigned long long totalHundredths, bool coloring) {
char buffer[10];
int len;
unsigned long long totalSeconds = totalHundredths / 100;
unsigned long long hours = totalSeconds / 3600;
unsigned long long days = totalSeconds / 86400;
int minutes = (totalSeconds / 60) % 60;
int seconds = totalSeconds % 60;
int hundredths = totalHundredths - (totalSeconds * 100);
int yearColor = coloring ? CRT_colors[LARGE_NUMBER] : CRT_colors[PROCESS];
int dayColor = coloring ? CRT_colors[PROCESS_GIGABYTES] : CRT_colors[PROCESS];
int hourColor = coloring ? CRT_colors[PROCESS_MEGABYTES] : CRT_colors[PROCESS];
int defColor = CRT_colors[PROCESS];
if (days >= /* Ignore leapyears */365) {
int years = days / 365;
int daysLeft = days - 365 * years;
if (daysLeft >= 100) {
len = xSnprintf(buffer, sizeof(buffer), "%3dy", years);
RichString_appendnAscii(str, yearColor, buffer, len);
len = xSnprintf(buffer, sizeof(buffer), "%3dd ", daysLeft);
RichString_appendnAscii(str, dayColor, buffer, len);
} else if (daysLeft >= 10) {
len = xSnprintf(buffer, sizeof(buffer), "%4dy", years);
RichString_appendnAscii(str, yearColor, buffer, len);
len = xSnprintf(buffer, sizeof(buffer), "%2dd ", daysLeft);
RichString_appendnAscii(str, dayColor, buffer, len);
} else {
len = xSnprintf(buffer, sizeof(buffer), "%5dy", years);
RichString_appendnAscii(str, yearColor, buffer, len);
len = xSnprintf(buffer, sizeof(buffer), "%1dd ", daysLeft);
RichString_appendnAscii(str, dayColor, buffer, len);
}
} else if (days >= 100) {
int hoursLeft = hours - days * 24;
if (hoursLeft >= 10) {
len = xSnprintf(buffer, sizeof(buffer), "%4llud", days);
RichString_appendnAscii(str, dayColor, buffer, len);
len = xSnprintf(buffer, sizeof(buffer), "%2dh ", hoursLeft);
RichString_appendnAscii(str, hourColor, buffer, len);
} else {
len = xSnprintf(buffer, sizeof(buffer), "%5llud", days);
RichString_appendnAscii(str, dayColor, buffer, len);
len = xSnprintf(buffer, sizeof(buffer), "%1dh ", hoursLeft);
RichString_appendnAscii(str, hourColor, buffer, len);
}
} else if (hours >= 100) {
int minutesLeft = totalSeconds / 60 - hours * 60;
if (minutesLeft >= 10) {
len = xSnprintf(buffer, sizeof(buffer), "%4lluh", hours);
RichString_appendnAscii(str, hourColor, buffer, len);
len = xSnprintf(buffer, sizeof(buffer), "%2dm ", minutesLeft);
RichString_appendnAscii(str, defColor, buffer, len);
} else {
len = xSnprintf(buffer, sizeof(buffer), "%5lluh", hours);
RichString_appendnAscii(str, hourColor, buffer, len);
len = xSnprintf(buffer, sizeof(buffer), "%1dm ", minutesLeft);
RichString_appendnAscii(str, defColor, buffer, len);
}
} else if (hours > 0) {
len = xSnprintf(buffer, sizeof(buffer), "%2lluh", hours);
RichString_appendnAscii(str, hourColor, buffer, len);
len = xSnprintf(buffer, sizeof(buffer), "%02d:%02d ", minutes, seconds);
RichString_appendnAscii(str, defColor, buffer, len);
} else {
len = xSnprintf(buffer, sizeof(buffer), "%2d:%02d.%02d ", minutes, seconds, hundredths);
RichString_appendnAscii(str, defColor, buffer, len);
}
}
void Process_fillStarttimeBuffer(Process* this) {
struct tm date;
(void) localtime_r(&this->starttime_ctime, &date);
strftime(this->starttime_show, sizeof(this->starttime_show) - 1, (this->starttime_ctime > (time(NULL) - 86400)) ? "%R " : "%b%d ", &date);
}
/*
* TASK_COMM_LEN is defined to be 16 for /proc/[pid]/comm in man proc(5), but it is
* not available in an userspace header - so define it.
*
* Note: This is taken from LINUX headers, but implicitly taken for other platforms
* for sake of brevity.
*
* Note: when colorizing a basename with the comm prefix, the entire basename
* (not just the comm prefix) is colorized for better readability, and it is
* implicit that only upto (TASK_COMM_LEN - 1) could be comm.
*/
#define TASK_COMM_LEN 16
static bool findCommInCmdline(const char* comm, const char* cmdline, int cmdlineBasenameStart, int* pCommStart, int* pCommEnd) {
/* Try to find procComm in tokenized cmdline - this might in rare cases
* mis-identify a string or fail, if comm or cmdline had been unsuitably
* modified by the process */
const char* tokenBase;
size_t tokenLen;
const size_t commLen = strlen(comm);
if (cmdlineBasenameStart < 0)
return false;
for (const char* token = cmdline + cmdlineBasenameStart; *token;) {
for (tokenBase = token; *token && *token != '\n'; ++token) {
if (*token == '/') {
tokenBase = token + 1;
}
}
tokenLen = token - tokenBase;
if ((tokenLen == commLen || (tokenLen > commLen && commLen == (TASK_COMM_LEN - 1))) &&
strncmp(tokenBase, comm, commLen) == 0) {
*pCommStart = tokenBase - cmdline;
*pCommEnd = token - cmdline;
return true;
}
if (*token) {
do {
++token;
} while (*token && '\n' == *token);
}
}
return false;
}
static int matchCmdlinePrefixWithExeSuffix(const char* cmdline, int cmdlineBaseOffset, const char* exe, int exeBaseOffset, int exeBaseLen) {
int matchLen; /* matching length to be returned */
char delim; /* delimiter following basename */
/* cmdline prefix is an absolute path: it must match whole exe. */
if (cmdline[0] == '/') {
matchLen = exeBaseLen + exeBaseOffset;
if (strncmp(cmdline, exe, matchLen) == 0) {
delim = cmdline[matchLen];
if (delim == 0 || delim == '\n' || delim == ' ') {
return matchLen;
}
}
return 0;
}
/* cmdline prefix is a relative path: We need to first match the basename at
* cmdlineBaseOffset and then reverse match the cmdline prefix with the exe
* suffix. But there is a catch: Some processes modify their cmdline in ways
* that make htop's identification of the basename in cmdline unreliable.
* For e.g. /usr/libexec/gdm-session-worker modifies its cmdline to
* "gdm-session-worker [pam/gdm-autologin]" and htop ends up with
* proccmdlineBasenameEnd at "gdm-autologin]". This issue could arise with
* chrome as well as it stores in cmdline its concatenated argument vector,
* without NUL delimiter between the arguments (which may contain a '/')
*
* So if needed, we adjust cmdlineBaseOffset to the previous (if any)
* component of the cmdline relative path, and retry the procedure. */
bool delimFound; /* if valid basename delimiter found */
do {
/* match basename */
matchLen = exeBaseLen + cmdlineBaseOffset;
if (cmdlineBaseOffset < exeBaseOffset &&
strncmp(cmdline + cmdlineBaseOffset, exe + exeBaseOffset, exeBaseLen) == 0) {
delim = cmdline[matchLen];
if (delim == 0 || delim == '\n' || delim == ' ') {
int i, j;
/* reverse match the cmdline prefix and exe suffix */
for (i = cmdlineBaseOffset - 1, j = exeBaseOffset - 1;
i >= 0 && j >= 0 && cmdline[i] == exe[j]; --i, --j)
;
/* full match, with exe suffix being a valid relative path */
if (i < 0 && j >= 0 && exe[j] == '/')
return matchLen;
}
}
/* Try to find the previous potential cmdlineBaseOffset - it would be
* preceded by '/' or nothing, and delimited by ' ' or '\n' */
for (delimFound = false, cmdlineBaseOffset -= 2; cmdlineBaseOffset > 0; --cmdlineBaseOffset) {
if (delimFound) {
if (cmdline[cmdlineBaseOffset - 1] == '/') {
break;
}
} else if (cmdline[cmdlineBaseOffset] == ' ' || cmdline[cmdlineBaseOffset] == '\n') {
delimFound = true;
}
}
} while (delimFound);
return 0;
}
/* stpcpy, but also converts newlines to spaces */
static inline char* stpcpyWithNewlineConversion(char* dstStr, const char* srcStr) {
for (; *srcStr; ++srcStr) {
*dstStr++ = (*srcStr == '\n') ? ' ' : *srcStr;
}
*dstStr = 0;
return dstStr;
}
/*
* This function makes the merged Command string. It also stores the offsets of the
* basename, comm w.r.t the merged Command string - these offsets will be used by
* Process_writeCommand() for coloring. The merged Command string is also
* returned by Process_getCommand() for searching, sorting and filtering.
*/
void Process_makeCommandStr(Process* this) {
ProcessMergedCommand* mc = &this->mergedCommand;
const Settings* settings = this->settings;
bool showMergedCommand = settings->showMergedCommand;
bool showProgramPath = settings->showProgramPath;
bool searchCommInCmdline = settings->findCommInCmdline;
bool stripExeFromCmdline = settings->stripExeFromCmdline;
bool showThreadNames = settings->showThreadNames;
/* Nothing to do to (Re)Generate the Command string, if the process is:
* - a kernel thread, or
* - a zombie from before being under htop's watch, or
* - a user thread and showThreadNames is not set */
if (Process_isKernelThread(this))
return;
if (this->state == ZOMBIE && !this->mergedCommand.str)
return;
if (Process_isUserlandThread(this) && settings->showThreadNames && (showThreadNames == mc->prevShowThreadNames) && (mc->prevMergeSet == showMergedCommand))
return;
/* this->mergedCommand.str needs updating only if its state or contents changed.
* Its content is based on the fields cmdline, comm, and exe. */
if (
mc->prevMergeSet == showMergedCommand &&
mc->prevPathSet == showProgramPath &&
mc->prevCommSet == searchCommInCmdline &&
mc->prevCmdlineSet == stripExeFromCmdline &&
mc->prevShowThreadNames == showThreadNames &&
!mc->cmdlineChanged &&
!mc->commChanged &&
!mc->exeChanged
) {
return;
}
/* The field separtor "│" has been chosen such that it will not match any
* valid string used for searching or filtering */
const char* SEPARATOR = CRT_treeStr[TREE_STR_VERT];
const int SEPARATOR_LEN = strlen(SEPARATOR);
/* Check for any changed fields since we last built this string */
if (mc->cmdlineChanged || mc->commChanged || mc->exeChanged) {
free(mc->str);
/* Accommodate the column text, two field separators and terminating NUL */
size_t maxLen = 2 * SEPARATOR_LEN + 1;
maxLen += this->cmdline ? strlen(this->cmdline) : strlen("(zombie)");
maxLen += this->procComm ? strlen(this->procComm) : 0;
maxLen += this->procExe ? strlen(this->procExe) : 0;
mc->str = xCalloc(1, maxLen);
}
/* Preserve the settings used in this run */
mc->prevMergeSet = showMergedCommand;
mc->prevPathSet = showProgramPath;
mc->prevCommSet = searchCommInCmdline;
mc->prevCmdlineSet = stripExeFromCmdline;
mc->prevShowThreadNames = showThreadNames;
/* Mark everything as unchanged */
mc->cmdlineChanged = false;
mc->commChanged = false;
mc->exeChanged = false;
/* Reset all locations that need extra handling when actually displaying */
mc->highlightCount = 0;
memset(mc->highlights, 0, sizeof(mc->highlights));
size_t mbMismatch = 0;
#define WRITE_HIGHLIGHT(_offset, _length, _attr, _flags) \
do { \
/* Check if we still have capacity */ \
assert(mc->highlightCount < ARRAYSIZE(mc->highlights)); \
if (mc->highlightCount >= ARRAYSIZE(mc->highlights)) \
break; \
\
mc->highlights[mc->highlightCount].offset = str - strStart + (_offset) - mbMismatch; \
mc->highlights[mc->highlightCount].length = _length; \
mc->highlights[mc->highlightCount].attr = _attr; \
mc->highlights[mc->highlightCount].flags = _flags; \
mc->highlightCount++; \
} while (0)
#define WRITE_SEPARATOR \
do { \
WRITE_HIGHLIGHT(0, 1, CRT_colors[FAILED_READ], CMDLINE_HIGHLIGHT_FLAG_SEPARATOR); \
mbMismatch += SEPARATOR_LEN - 1; \
str = stpcpy(str, SEPARATOR); \
} while (0)
const int baseAttr = Process_isThread(this) ? CRT_colors[PROCESS_THREAD_BASENAME] : CRT_colors[PROCESS_BASENAME];
const int commAttr = Process_isThread(this) ? CRT_colors[PROCESS_THREAD_COMM] : CRT_colors[PROCESS_COMM];
const int delExeAttr = CRT_colors[FAILED_READ];
const int delLibAttr = CRT_colors[PROCESS_TAG];
/* Establish some shortcuts to data we need */
const char* cmdline = this->cmdline;
const char* procComm = this->procComm;
const char* procExe = this->procExe;
char* strStart = mc->str;
char* str = strStart;
int cmdlineBasenameStart = this->cmdlineBasenameStart;
int cmdlineBasenameEnd = this->cmdlineBasenameEnd;
if (!cmdline) {
cmdlineBasenameStart = 0;
cmdlineBasenameEnd = 0;
cmdline = "(zombie)";
}
assert(cmdlineBasenameStart >= 0);
assert(cmdlineBasenameStart <= (int)strlen(cmdline));
if (!showMergedCommand || !procExe || !procComm) { /* fall back to cmdline */
if ((showMergedCommand || (Process_isUserlandThread(this) && showThreadNames)) && procComm && strlen(procComm)) { /* set column to or prefix it with comm */
if (strncmp(cmdline + cmdlineBasenameStart, procComm, MINIMUM(TASK_COMM_LEN - 1, strlen(procComm))) != 0) {
WRITE_HIGHLIGHT(0, strlen(procComm), commAttr, CMDLINE_HIGHLIGHT_FLAG_COMM);
str = stpcpy(str, procComm);
if(!showMergedCommand)
return;
WRITE_SEPARATOR;
}
}
if (cmdlineBasenameEnd > cmdlineBasenameStart)
WRITE_HIGHLIGHT(showProgramPath ? cmdlineBasenameStart : 0, cmdlineBasenameEnd - cmdlineBasenameStart, baseAttr, CMDLINE_HIGHLIGHT_FLAG_BASENAME);
if (this->procExeDeleted)
WRITE_HIGHLIGHT(showProgramPath ? cmdlineBasenameStart : 0, cmdlineBasenameEnd - cmdlineBasenameStart, delExeAttr, CMDLINE_HIGHLIGHT_FLAG_DELETED);
else if (this->usesDeletedLib)
WRITE_HIGHLIGHT(showProgramPath ? cmdlineBasenameStart : 0, cmdlineBasenameEnd - cmdlineBasenameStart, delLibAttr, CMDLINE_HIGHLIGHT_FLAG_DELETED);
(void)stpcpyWithNewlineConversion(str, cmdline + (showProgramPath ? 0 : cmdlineBasenameStart));
return;
}
int exeLen = strlen(this->procExe);
int exeBasenameOffset = this->procExeBasenameOffset;
int exeBasenameLen = exeLen - exeBasenameOffset;
assert(exeBasenameOffset >= 0);
assert(exeBasenameOffset <= (int)strlen(procExe));
bool haveCommInExe = false;
if (procExe && procComm && (!Process_isUserlandThread(this) || showThreadNames)) {
haveCommInExe = strncmp(procExe + exeBasenameOffset, procComm, TASK_COMM_LEN - 1) == 0;
}
/* Start with copying exe */
if (showProgramPath) {
if (haveCommInExe)
WRITE_HIGHLIGHT(exeBasenameOffset, exeBasenameLen, commAttr, CMDLINE_HIGHLIGHT_FLAG_COMM);
WRITE_HIGHLIGHT(exeBasenameOffset, exeBasenameLen, baseAttr, CMDLINE_HIGHLIGHT_FLAG_BASENAME);
if (this->procExeDeleted)
WRITE_HIGHLIGHT(exeBasenameOffset, exeBasenameLen, delExeAttr, CMDLINE_HIGHLIGHT_FLAG_DELETED);
else if (this->usesDeletedLib)
WRITE_HIGHLIGHT(exeBasenameOffset, exeBasenameLen, delLibAttr, CMDLINE_HIGHLIGHT_FLAG_DELETED);
str = stpcpy(str, procExe);
} else {
if (haveCommInExe)
WRITE_HIGHLIGHT(0, exeBasenameLen, commAttr, CMDLINE_HIGHLIGHT_FLAG_COMM);
WRITE_HIGHLIGHT(0, exeBasenameLen, baseAttr, CMDLINE_HIGHLIGHT_FLAG_BASENAME);
if (this->procExeDeleted)
WRITE_HIGHLIGHT(0, exeBasenameLen, delExeAttr, CMDLINE_HIGHLIGHT_FLAG_DELETED);
else if (this->usesDeletedLib)
WRITE_HIGHLIGHT(0, exeBasenameLen, delLibAttr, CMDLINE_HIGHLIGHT_FLAG_DELETED);
str = stpcpy(str, procExe + exeBasenameOffset);
}
bool haveCommInCmdline = false;
int commStart = 0;
int commEnd = 0;
/* Try to match procComm with procExe's basename: This is reliable (predictable) */
if (searchCommInCmdline) {
/* commStart/commEnd will be adjusted later along with cmdline */
haveCommInCmdline = (!Process_isUserlandThread(this) || showThreadNames) && findCommInCmdline(procComm, cmdline, cmdlineBasenameStart, &commStart, &commEnd);
}
int matchLen = matchCmdlinePrefixWithExeSuffix(cmdline, cmdlineBasenameStart, procExe, exeBasenameOffset, exeBasenameLen);
bool haveCommField = false;
if (!haveCommInExe && !haveCommInCmdline && procComm && (!Process_isUserlandThread(this) || showThreadNames)) {
WRITE_SEPARATOR;
WRITE_HIGHLIGHT(0, strlen(procComm), commAttr, CMDLINE_HIGHLIGHT_FLAG_COMM);
str = stpcpy(str, procComm);
haveCommField = true;
}
if (matchLen) {
/* strip the matched exe prefix */
cmdline += matchLen;
commStart -= matchLen;
commEnd -= matchLen;
}
if (!matchLen || (haveCommField && *cmdline)) {
/* cmdline will be a separate field */
WRITE_SEPARATOR;
}
if (!haveCommInExe && haveCommInCmdline && !haveCommField && (!Process_isUserlandThread(this) || showThreadNames))
WRITE_HIGHLIGHT(commStart, commEnd - commStart, commAttr, CMDLINE_HIGHLIGHT_FLAG_COMM);
/* Display cmdline if it hasn't been consumed by procExe */
if (*cmdline)
(void)stpcpyWithNewlineConversion(str, cmdline);
#undef WRITE_SEPARATOR
#undef WRITE_HIGHLIGHT
}
void Process_writeCommand(const Process* this, int attr, int baseAttr, RichString* str) {
(void)baseAttr;
const ProcessMergedCommand* mc = &this->mergedCommand;
int strStart = RichString_size(str);
const bool highlightBaseName = this->settings->highlightBaseName;
const bool highlightSeparator = true;
const bool highlightDeleted = this->settings->highlightDeletedExe;
if (!this->mergedCommand.str) {
int len = 0;
const char* cmdline = this->cmdline;
if (highlightBaseName || !this->settings->showProgramPath) {
int basename = 0;
for (int i = 0; i < this->cmdlineBasenameEnd; i++) {
if (cmdline[i] == '/') {
basename = i + 1;
} else if (cmdline[i] == ':') {
len = i + 1;
break;
}
}
if (len == 0) {
if (this->settings->showProgramPath) {
strStart += basename;
} else {
cmdline += basename;
}
len = this->cmdlineBasenameEnd - basename;
}
}
RichString_appendWide(str, attr, cmdline);
if (this->settings->highlightBaseName) {
RichString_setAttrn(str, baseAttr, strStart, len);
}
return;
}
RichString_appendWide(str, attr, this->mergedCommand.str);
for (size_t i = 0, hlCount = CLAMP(mc->highlightCount, 0, ARRAYSIZE(mc->highlights)); i < hlCount; i++) {
const ProcessCmdlineHighlight* hl = &mc->highlights[i];
if (!hl->length)
continue;
if (hl->flags & CMDLINE_HIGHLIGHT_FLAG_SEPARATOR)
if (!highlightSeparator)
continue;
if (hl->flags & CMDLINE_HIGHLIGHT_FLAG_BASENAME)
if (!highlightBaseName)
continue;
if (hl->flags & CMDLINE_HIGHLIGHT_FLAG_DELETED)
if (!highlightDeleted)
continue;
RichString_setAttrn(str, hl->attr, strStart + hl->offset, hl->length);
}
}
void Process_printRate(RichString* str, double rate, bool coloring) {
char buffer[16];
int largeNumberColor = CRT_colors[LARGE_NUMBER];
int processMegabytesColor = CRT_colors[PROCESS_MEGABYTES];
int processColor = CRT_colors[PROCESS];
int shadowColor = CRT_colors[PROCESS_SHADOW];
if (!coloring) {
largeNumberColor = CRT_colors[PROCESS];
processMegabytesColor = CRT_colors[PROCESS];
}
if (isnan(rate)) {
RichString_appendAscii(str, shadowColor, " N/A ");
} else if (rate < 0.005) {
int len = snprintf(buffer, sizeof(buffer), "%7.2f B/s ", rate);
RichString_appendnAscii(str, shadowColor, buffer, len);
} else if (rate < ONE_K) {
int len = snprintf(buffer, sizeof(buffer), "%7.2f B/s ", rate);
RichString_appendnAscii(str, processColor, buffer, len);
} else if (rate < ONE_M) {
int len = snprintf(buffer, sizeof(buffer), "%7.2f K/s ", rate / ONE_K);
RichString_appendnAscii(str, processColor, buffer, len);
} else if (rate < ONE_G) {
int len = snprintf(buffer, sizeof(buffer), "%7.2f M/s ", rate / ONE_M);
RichString_appendnAscii(str, processMegabytesColor, buffer, len);
} else if (rate < ONE_T) {
int len = snprintf(buffer, sizeof(buffer), "%7.2f G/s ", rate / ONE_G);
RichString_appendnAscii(str, largeNumberColor, buffer, len);
} else if (rate < ONE_P) {
int len = snprintf(buffer, sizeof(buffer), "%7.2f T/s ", rate / ONE_T);
RichString_appendnAscii(str, largeNumberColor, buffer, len);
} else {
int len = snprintf(buffer, sizeof(buffer), "%7.2f P/s ", rate / ONE_P);
RichString_appendnAscii(str, largeNumberColor, buffer, len);
}
}
void Process_printLeftAlignedField(RichString* str, int attr, const char* content, unsigned int width) {
int columns = width;
RichString_appendnWideColumns(str, attr, content, strlen(content), &columns);
RichString_appendChr(str, attr, ' ', width + 1 - columns);
}
void Process_printPercentage(float val, char* buffer, int n, int* attr) {
if (val >= 0) {
if (val < 99.9F) {
if (val < 0.05F) {
*attr = CRT_colors[PROCESS_SHADOW];
}
xSnprintf(buffer, n, "%4.1f ", val);
} else if (val < 999) {
*attr = CRT_colors[PROCESS_MEGABYTES];
xSnprintf(buffer, n, "%3d. ", (int)val);
} else {
*attr = CRT_colors[PROCESS_MEGABYTES];
xSnprintf(buffer, n, "%4d ", (int)val);
}
} else {
*attr = CRT_colors[PROCESS_SHADOW];
xSnprintf(buffer, n, " N/A ");
}
}
static inline char processStateChar(ProcessState state) {
switch (state) {
case UNKNOWN: return '?';
case RUNNABLE: return 'U';
case RUNNING: return 'R';
case QUEUED: return 'Q';
case WAITING: return 'W';
case UNINTERRUPTIBLE_WAIT: return 'D';
case BLOCKED: return 'B';
case PAGING: return 'P';
case STOPPED: return 'T';
case TRACED: return 't';
case ZOMBIE: return 'Z';
case DEFUNCT: return 'X';
case IDLE: return 'I';
case SLEEPING: return 'S';
default:
assert(0);
return '!';
}
}
void Process_writeField(const Process* this, RichString* str, ProcessField field) {
char buffer[256];
size_t n = sizeof(buffer);
int attr = CRT_colors[DEFAULT_COLOR];
bool coloring = this->settings->highlightMegabytes;
switch (field) {
case COMM: {
int baseattr = CRT_colors[PROCESS_BASENAME];
if (this->settings->highlightThreads && Process_isThread(this)) {
attr = CRT_colors[PROCESS_THREAD];
baseattr = CRT_colors[PROCESS_THREAD_BASENAME];
}
const ScreenSettings* ss = this->settings->ss;
if (!ss->treeView || this->indent == 0) {
Process_writeCommand(this, attr, baseattr, str);
return;
}
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 = xSnprintf(buf, n, "%s ", CRT_treeStr[TREE_STR_VERT]);
} else {
ret = xSnprintf(buf, n, " ");
}
if (ret < 0 || (size_t)ret >= n) {
written = n;
} else {
written = ret;
}
buf += written;
n -= written;
}
const char* draw = CRT_treeStr[lastItem ? TREE_STR_BEND : TREE_STR_RTEE];
xSnprintf(buf, n, "%s%s ", draw, this->showChildren ? CRT_treeStr[TREE_STR_SHUT] : CRT_treeStr[TREE_STR_OPEN] );
RichString_appendWide(str, CRT_colors[PROCESS_TREE], buffer);
Process_writeCommand(this, attr, baseattr, str);
return;
}
case PROC_COMM: {
const char* procComm;
if (this->procComm) {
attr = CRT_colors[Process_isUserlandThread(this) ? PROCESS_THREAD_COMM : PROCESS_COMM];
procComm = this->procComm;
} else {
attr = CRT_colors[PROCESS_SHADOW];
procComm = Process_isKernelThread(this) ? kthreadID : "N/A";
}
Process_printLeftAlignedField(str, attr, procComm, TASK_COMM_LEN - 1);
return;
}
case PROC_EXE: {
const char* procExe;
if (this->procExe) {
attr = CRT_colors[Process_isUserlandThread(this) ? PROCESS_THREAD_BASENAME : PROCESS_BASENAME];
if (this->settings->highlightDeletedExe) {
if (this->procExeDeleted)
attr = CRT_colors[FAILED_READ];
else if (this->usesDeletedLib)
attr = CRT_colors[PROCESS_TAG];
}
procExe = this->procExe + this->procExeBasenameOffset;
} else {
attr = CRT_colors[PROCESS_SHADOW];
procExe = Process_isKernelThread(this) ? kthreadID : "N/A";
}
Process_printLeftAlignedField(str, attr, procExe, TASK_COMM_LEN - 1);
return;
}
case CWD: {
const char* cwd;
if (!this->procCwd) {
attr = CRT_colors[PROCESS_SHADOW];
cwd = "N/A";
} else if (String_startsWith(this->procCwd, "/proc/") && strstr(this->procCwd, " (deleted)") != NULL) {
attr = CRT_colors[PROCESS_SHADOW];
cwd = "main thread terminated";
} else {
cwd = this->procCwd;
}
Process_printLeftAlignedField(str, attr, cwd, 25);
return;
}
case ELAPSED: Process_printTime(str, /* convert to hundreds of a second */ this->processList->realtimeMs / 10 - 100 * this->starttime_ctime, coloring); return;
case MAJFLT: Process_printCount(str, this->majflt, coloring); return;
case MINFLT: Process_printCount(str, this->minflt, coloring); return;
case M_RESIDENT: Process_printKBytes(str, this->m_resident, coloring); return;
case M_VIRT: Process_printKBytes(str, this->m_virt, 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]
: CRT_colors[PROCESS_SHADOW];
break;
case NLWP:
if (this->nlwp == 1)
attr = CRT_colors[PROCESS_SHADOW];
xSnprintf(buffer, n, "%4ld ", this->nlwp);
break;
case PERCENT_CPU: Process_printPercentage(this->percent_cpu, buffer, n, &attr); break;
case PERCENT_NORM_CPU: {
float cpuPercentage = this->percent_cpu / this->processList->activeCPUs;
Process_printPercentage(cpuPercentage, buffer, n, &attr);
break;
}
case PERCENT_MEM: Process_printPercentage(this->percent_mem, buffer, n, &attr); break;
case PGRP: xSnprintf(buffer, n, "%*d ", Process_pidDigits, this->pgrp); break;
case PID: xSnprintf(buffer, n, "%*d ", Process_pidDigits, this->pid); break;
case PPID: xSnprintf(buffer, n, "%*d ", Process_pidDigits, 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, "%*d ", Process_pidDigits, this->session); break;
case STARTTIME: xSnprintf(buffer, n, "%s", this->starttime_show); break;
case STATE:
xSnprintf(buffer, n, "%c ", processStateChar(this->state));
switch (this->state) {
case RUNNABLE:
case RUNNING:
case TRACED:
attr = CRT_colors[PROCESS_RUN_STATE];
break;
case BLOCKED:
case DEFUNCT:
case STOPPED:
case UNINTERRUPTIBLE_WAIT:
case ZOMBIE:
attr = CRT_colors[PROCESS_D_STATE];
break;
case QUEUED:
case WAITING:
case IDLE:
case SLEEPING:
attr = CRT_colors[PROCESS_SHADOW];
break;
case UNKNOWN:
case PAGING:
break;
}
break;
case ST_UID: xSnprintf(buffer, n, "%*d ", Process_uidDigits, this->st_uid); break;
case TIME: Process_printTime(str, this->time, coloring); return;
case TGID:
if (this->tgid == this->pid)
attr = CRT_colors[PROCESS_SHADOW];
xSnprintf(buffer, n, "%*d ", Process_pidDigits, this->tgid);
break;
case TPGID: xSnprintf(buffer, n, "%*d ", Process_pidDigits, this->tpgid); break;
case TTY:
if (!this->tty_name) {
attr = CRT_colors[PROCESS_SHADOW];
xSnprintf(buffer, n, "(no tty) ");
} else {
const char* name = String_startsWith(this->tty_name, "/dev/") ? (this->tty_name + strlen("/dev/")) : this->tty_name;
xSnprintf(buffer, n, "%-8s ", name);
}
break;
case USER:
if (Process_getuid != this->st_uid)
attr = CRT_colors[PROCESS_SHADOW];
if (this->user) {
Process_printLeftAlignedField(str, attr, this->user, 10);
return;
}
xSnprintf(buffer, n, "%-10d ", this->st_uid);
break;
default:
if (DynamicColumn_writeField(this, str, field))
return;
assert(0 && "Process_writeField: default key reached"); /* should never be reached */
xSnprintf(buffer, n, "- ");
break;
}
RichString_appendAscii(str, attr, buffer);
}
void Process_display(const Object* cast, RichString* out) {
const Process* this = (const Process*) cast;
const ProcessField* fields = this->settings->ss->fields;
for (int i = 0; fields[i]; i++)
As_Process(this)->writeField(this, out, fields[i]);
if (this->settings->shadowOtherUsers && this->st_uid != Process_getuid) {
RichString_setAttr(out, CRT_colors[PROCESS_SHADOW]);
}
if (this->tag == true) {
RichString_setAttr(out, CRT_colors[PROCESS_TAG]);
}
if (this->settings->highlightChanges) {
if (Process_isTomb(this)) {
out->highlightAttr = CRT_colors[PROCESS_TOMB];
} else if (Process_isNew(this)) {
out->highlightAttr = CRT_colors[PROCESS_NEW];
}
}
assert(RichString_size(out) > 0);
}
void Process_done(Process* this) {
assert (this != NULL);
free(this->cmdline);
free(this->procComm);
free(this->procExe);
free(this->procCwd);
free(this->mergedCommand.str);
free(this->tty_name);
}
/* This function returns the string displayed in Command column, so that sorting
* happens on what is displayed - whether comm, full path, basename, etc.. So
* this follows Process_writeField(COMM) and Process_writeCommand */
const char* Process_getCommand(const Process* this) {
if ((Process_isUserlandThread(this) && this->settings->showThreadNames) || !this->mergedCommand.str) {
return this->cmdline;
}
return this->mergedCommand.str;
}
const ProcessClass Process_class = {
.super = {
.extends = Class(Object),
.display = Process_display,
.delete = Process_delete,
.compare = Process_compare
},
.writeField = Process_writeField,
};
void Process_init(Process* this, const Settings* settings) {
this->settings = settings;
this->tag = false;
this->showChildren = true;
this->show = true;
this->updated = false;
this->cmdlineBasenameEnd = -1;
this->st_uid = (uid_t)-1;
if (Process_getuid == (uid_t)-1) {
Process_getuid = getuid();
}
}
void Process_toggleTag(Process* this) {
this->tag = !this->tag;
}
bool Process_isNew(const Process* this) {
assert(this->processList);
if (this->processList->monotonicMs >= this->seenStampMs) {
return this->processList->monotonicMs - this->seenStampMs <= 1000 * (uint64_t)this->processList->settings->highlightDelaySecs;
}
return false;
}
bool Process_isTomb(const Process* this) {
return this->tombStampMs > 0;
}
bool Process_setPriority(Process* this, int priority) {
if (Settings_isReadonly())
return false;
int old_prio = getpriority(PRIO_PROCESS, this->pid);
int err = setpriority(PRIO_PROCESS, this->pid, priority);
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) {
return kill(this->pid, sgn.i) == 0;
}
int Process_pidCompare(const void* v1, const void* v2) {
const Process* p1 = (const Process*)v1;
const Process* p2 = (const Process*)v2;
return SPACESHIP_NUMBER(p1->pid, p2->pid);
}
int Process_compare(const void* v1, const void* v2) {
const Process* p1 = (const Process*)v1;
const Process* p2 = (const Process*)v2;
const Settings* settings = p1->settings;
const ScreenSettings* ss = settings->ss;
ProcessField key = ScreenSettings_getActiveSortKey(ss);
int result = Process_compareByKey(p1, p2, key);
// Implement tie-breaker (needed to make tree mode more stable)
if (!result)
return SPACESHIP_NUMBER(p1->pid, p2->pid);
return (ScreenSettings_getActiveDirection(ss) == 1) ? result : -result;
}
int Process_compareByKey_Base(const Process* p1, const Process* p2, ProcessField key) {
int r;
switch (key) {
case PERCENT_CPU:
case PERCENT_NORM_CPU:
return SPACESHIP_NUMBER(p1->percent_cpu, p2->percent_cpu);
case PERCENT_MEM:
return SPACESHIP_NUMBER(p1->m_resident, p2->m_resident);
case COMM:
return SPACESHIP_NULLSTR(Process_getCommand(p1), Process_getCommand(p2));
case PROC_COMM: {
const char* comm1 = p1->procComm ? p1->procComm : (Process_isKernelThread(p1) ? kthreadID : "");
const char* comm2 = p2->procComm ? p2->procComm : (Process_isKernelThread(p2) ? kthreadID : "");
return SPACESHIP_NULLSTR(comm1, comm2);
}
case PROC_EXE: {
const char* exe1 = p1->procExe ? (p1->procExe + p1->procExeBasenameOffset) : (Process_isKernelThread(p1) ? kthreadID : "");
const char* exe2 = p2->procExe ? (p2->procExe + p2->procExeBasenameOffset) : (Process_isKernelThread(p2) ? kthreadID : "");
return SPACESHIP_NULLSTR(exe1, exe2);
}
case CWD:
return SPACESHIP_NULLSTR(p1->procCwd, p2->procCwd);
case ELAPSED:
r = -SPACESHIP_NUMBER(p1->starttime_ctime, p2->starttime_ctime);
return r != 0 ? r : SPACESHIP_NUMBER(p1->pid, p2->pid);
case MAJFLT:
return SPACESHIP_NUMBER(p1->majflt, p2->majflt);
case MINFLT:
return SPACESHIP_NUMBER(p1->minflt, p2->minflt);
case M_RESIDENT:
return SPACESHIP_NUMBER(p1->m_resident, p2->m_resident);
case M_VIRT:
return SPACESHIP_NUMBER(p1->m_virt, p2->m_virt);
case NICE:
return SPACESHIP_NUMBER(p1->nice, p2->nice);
case NLWP:
return SPACESHIP_NUMBER(p1->nlwp, p2->nlwp);
case PGRP:
return SPACESHIP_NUMBER(p1->pgrp, p2->pgrp);
case PID:
return SPACESHIP_NUMBER(p1->pid, p2->pid);
case PPID:
return SPACESHIP_NUMBER(p1->ppid, p2->ppid);
case PRIORITY:
return SPACESHIP_NUMBER(p1->priority, p2->priority);
case PROCESSOR:
return SPACESHIP_NUMBER(p1->processor, p2->processor);
case SESSION:
return SPACESHIP_NUMBER(p1->session, p2->session);
case STARTTIME:
r = SPACESHIP_NUMBER(p1->starttime_ctime, p2->starttime_ctime);
return r != 0 ? r : SPACESHIP_NUMBER(p1->pid, p2->pid);
case STATE:
return SPACESHIP_NUMBER(p1->state, p2->state);
case ST_UID:
return SPACESHIP_NUMBER(p1->st_uid, p2->st_uid);
case TIME:
return SPACESHIP_NUMBER(p1->time, p2->time);
case TGID:
return SPACESHIP_NUMBER(p1->tgid, p2->tgid);
case TPGID:
return SPACESHIP_NUMBER(p1->tpgid, p2->tpgid);
case TTY:
/* Order no tty last */
return SPACESHIP_DEFAULTSTR(p1->tty_name, p2->tty_name, "\x7F");
case USER:
return SPACESHIP_NULLSTR(p1->user, p2->user);
default:
CRT_debug("Process_compareByKey_Base() called with key %d", key);
assert(0 && "Process_compareByKey_Base: default key reached"); /* should never be reached */
return SPACESHIP_NUMBER(p1->pid, p2->pid);
}
}
void Process_updateComm(Process* this, const char* comm) {
if (!this->procComm && !comm)
return;
if (this->procComm && comm && String_eq(this->procComm, comm))
return;
free(this->procComm);
this->procComm = comm ? xStrdup(comm) : NULL;
this->mergedCommand.commChanged = true;
}
static int skipPotentialPath(const char* cmdline, int end) {
if (cmdline[0] != '/')
return 0;
int slash = 0;
for (int i = 1; i < end; i++) {
if (cmdline[i] == '/' && cmdline[i + 1] != '\0') {
slash = i + 1;
continue;
}
if (cmdline[i] == ' ' && cmdline[i - 1] != '\\')
return slash;
if (cmdline[i] == ':' && cmdline[i + 1] == ' ')
return slash;
}
return slash;
}
void Process_updateCmdline(Process* this, const char* cmdline, int basenameStart, int basenameEnd) {
assert(basenameStart >= 0);
assert((cmdline && basenameStart < (int)strlen(cmdline)) || (!cmdline && basenameStart == 0));
assert((basenameEnd > basenameStart) || (basenameEnd == 0 && basenameStart == 0));
assert((cmdline && basenameEnd <= (int)strlen(cmdline)) || (!cmdline && basenameEnd == 0));
if (!this->cmdline && !cmdline)
return;
if (this->cmdline && cmdline && String_eq(this->cmdline, cmdline))
return;
free(this->cmdline);
this->cmdline = cmdline ? xStrdup(cmdline) : NULL;
this->cmdlineBasenameStart = (basenameStart || !cmdline) ? basenameStart : skipPotentialPath(cmdline, basenameEnd);
this->cmdlineBasenameEnd = basenameEnd;
this->mergedCommand.cmdlineChanged = true;
}
void Process_updateExe(Process* this, const char* exe) {
if (!this->procExe && !exe)
return;
if (this->procExe && exe && String_eq(this->procExe, exe))
return;
free(this->procExe);
if (exe) {
this->procExe = xStrdup(exe);
const char* lastSlash = strrchr(exe, '/');
this->procExeBasenameOffset = (lastSlash && *(lastSlash + 1) != '\0' && lastSlash != exe) ? (lastSlash - exe + 1) : 0;
} else {
this->procExe = NULL;
this->procExeBasenameOffset = 0;
}
this->mergedCommand.exeChanged = true;
}