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Add read-only option 

Add command line option to disable all system and process changing
features.
This commit is contained in:
Christian Göttsche 2021-01-21 20:27:37 +01:00 committed by cgzones
parent 812cfcb94d
commit 36880cd61c
12 changed files with 108 additions and 42 deletions
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98
Action.c
View File

@ -254,11 +254,17 @@ static Htop_Reaction actionIncSearch(State* st) {
}
static Htop_Reaction actionHigherPriority(State* st) {
if (Settings_isReadonly())
return HTOP_OK;
bool changed = changePriority(st->mainPanel, -1);
return changed ? HTOP_REFRESH : HTOP_OK;
}
static Htop_Reaction actionLowerPriority(State* st) {
if (Settings_isReadonly())
return HTOP_OK;
bool changed = changePriority(st->mainPanel, 1);
return changed ? HTOP_REFRESH : HTOP_OK;
}
@ -292,6 +298,9 @@ static Htop_Reaction actionQuit(ATTR_UNUSED State* st) {
}
static Htop_Reaction actionSetAffinity(State* st) {
if (Settings_isReadonly())
return HTOP_OK;
if (st->pl->cpuCount == 1)
return HTOP_OK;
@ -323,6 +332,9 @@ static Htop_Reaction actionSetAffinity(State* st) {
}
static Htop_Reaction actionKill(State* st) {
if (Settings_isReadonly())
return HTOP_OK;
Panel* signalsPanel = SignalsPanel_new();
const ListItem* sgn = (ListItem*) Action_pickFromVector(st, signalsPanel, 15, true);
if (sgn && sgn->key != 0) {
@ -370,6 +382,9 @@ static Htop_Reaction actionSetup(State* st) {
}
static Htop_Reaction actionLsof(State* st) {
if (Settings_isReadonly())
return HTOP_OK;
const Process* p = (Process*) Panel_getSelected((Panel*)st->mainPanel);
if (!p)
return HTOP_OK;
@ -394,6 +409,9 @@ static Htop_Reaction actionShowLocks(State* st) {
}
static Htop_Reaction actionStrace(State* st) {
if (Settings_isReadonly())
return HTOP_OK;
const Process* p = (Process*) Panel_getSelected((Panel*)st->mainPanel);
if (!p)
return HTOP_OK;
@ -431,49 +449,51 @@ static Htop_Reaction actionTogglePauseProcessUpdate(State* st) {
static const struct {
const char* key;
bool roInactive;
const char* info;
} helpLeft[] = {
{ .key = " Arrows: ", .info = "scroll process list" },
{ .key = " Digits: ", .info = "incremental PID search" },
{ .key = " F3 /: ", .info = "incremental name search" },
{ .key = " F4 \\: ",.info = "incremental name filtering" },
{ .key = " F5 t: ", .info = "tree view" },
{ .key = " p: ", .info = "toggle program path" },
{ .key = " m: ", .info = "toggle merged command" },
{ .key = " Z: ", .info = "pause/resume process updates" },
{ .key = " u: ", .info = "show processes of a single user" },
{ .key = " H: ", .info = "hide/show user process threads" },
{ .key = " K: ", .info = "hide/show kernel threads" },
{ .key = " F: ", .info = "cursor follows process" },
{ .key = " + - *: ", .info = "expand/collapse tree/toggle all" },
{ .key = "N P M T: ", .info = "sort by PID, CPU%, MEM% or TIME" },
{ .key = " I: ", .info = "invert sort order" },
{ .key = " F6 > .: ", .info = "select sort column" },
{ .key = " Arrows: ", .roInactive = false, .info = "scroll process list" },
{ .key = " Digits: ", .roInactive = false, .info = "incremental PID search" },
{ .key = " F3 /: ", .roInactive = false, .info = "incremental name search" },
{ .key = " F4 \\: ", .roInactive = false, .info = "incremental name filtering" },
{ .key = " F5 t: ", .roInactive = false, .info = "tree view" },
{ .key = " p: ", .roInactive = false, .info = "toggle program path" },
{ .key = " m: ", .roInactive = false, .info = "toggle merged command" },
{ .key = " Z: ", .roInactive = false, .info = "pause/resume process updates" },
{ .key = " u: ", .roInactive = false, .info = "show processes of a single user" },
{ .key = " H: ", .roInactive = false, .info = "hide/show user process threads" },
{ .key = " K: ", .roInactive = false, .info = "hide/show kernel threads" },
{ .key = " F: ", .roInactive = false, .info = "cursor follows process" },
{ .key = " + - *: ", .roInactive = false, .info = "expand/collapse tree/toggle all" },
{ .key = "N P M T: ", .roInactive = false, .info = "sort by PID, CPU%, MEM% or TIME" },
{ .key = " I: ", .roInactive = false, .info = "invert sort order" },
{ .key = " F6 > .: ", .roInactive = false, .info = "select sort column" },
{ .key = NULL, .info = NULL }
};
static const struct {
const char* key;
bool roInactive;
const char* info;
} helpRight[] = {
{ .key = " Space: ", .info = "tag process" },
{ .key = " c: ", .info = "tag process and its children" },
{ .key = " U: ", .info = "untag all processes" },
{ .key = " F9 k: ", .info = "kill process/tagged processes" },
{ .key = " F7 ]: ", .info = "higher priority (root only)" },
{ .key = " F8 [: ", .info = "lower priority (+ nice)" },
{ .key = " Space: ", .roInactive = false, .info = "tag process" },
{ .key = " c: ", .roInactive = false, .info = "tag process and its children" },
{ .key = " U: ", .roInactive = false, .info = "untag all processes" },
{ .key = " F9 k: ", .roInactive = true, .info = "kill process/tagged processes" },
{ .key = " F7 ]: ", .roInactive = true, .info = "higher priority (root only)" },
{ .key = " F8 [: ", .roInactive = false, .info = "lower priority (+ nice)" },
#if (defined(HAVE_LIBHWLOC) || defined(HAVE_LINUX_AFFINITY))
{ .key = " a: ", .info = "set CPU affinity" },
{ .key = " a: ", .roInactive = true, .info = "set CPU affinity" },
#endif
{ .key = " e: ", .info = "show process environment" },
{ .key = " i: ", .info = "set IO priority" },
{ .key = " l: ", .info = "list open files with lsof" },
{ .key = " x: ", .info = "list file locks of process" },
{ .key = " s: ", .info = "trace syscalls with strace" },
{ .key = " w: ", .info = "wrap process command in multiple lines" },
{ .key = " F2 C S: ", .info = "setup" },
{ .key = " F1 h: ", .info = "show this help screen" },
{ .key = " F10 q: ", .info = "quit" },
{ .key = " e: ", .roInactive = false, .info = "show process environment" },
{ .key = " i: ", .roInactive = true, .info = "set IO priority" },
{ .key = " l: ", .roInactive = true, .info = "list open files with lsof" },
{ .key = " x: ", .roInactive = false, .info = "list file locks of process" },
{ .key = " s: ", .roInactive = true, .info = "trace syscalls with strace" },
{ .key = " w: ", .roInactive = false, .info = "wrap process command in multiple lines" },
{ .key = " F2 C S: ", .roInactive = false, .info = "setup" },
{ .key = " F1 h: ", .roInactive = false, .info = "show this help screen" },
{ .key = " F10 q: ", .roInactive = false, .info = "quit" },
{ .key = NULL, .info = NULL }
};
@ -549,26 +569,28 @@ static Htop_Reaction actionHelp(State* st) {
line++;
const bool readonly = Settings_isReadonly();
int item;
for (item = 0; helpLeft[item].key; item++) {
attrset(CRT_colors[DEFAULT_COLOR]);
attrset((helpLeft[item].roInactive && readonly) ? CRT_colors[HELP_SHADOW] : CRT_colors[DEFAULT_COLOR]);
mvaddstr(line + item, 10, helpLeft[item].info);
attrset(CRT_colors[HELP_BOLD]);
attrset((helpLeft[item].roInactive && readonly) ? CRT_colors[HELP_SHADOW] : CRT_colors[HELP_BOLD]);
mvaddstr(line + item, 1, helpLeft[item].key);
if (String_eq(helpLeft[item].key, " H: ")) {
attrset(CRT_colors[PROCESS_THREAD]);
attrset((helpLeft[item].roInactive && readonly) ? CRT_colors[HELP_SHADOW] : CRT_colors[PROCESS_THREAD]);
mvaddstr(line + item, 33, "threads");
} else if (String_eq(helpLeft[item].key, " K: ")) {
attrset(CRT_colors[PROCESS_THREAD]);
attrset((helpLeft[item].roInactive && readonly) ? CRT_colors[HELP_SHADOW] : CRT_colors[PROCESS_THREAD]);
mvaddstr(line + item, 27, "threads");
}
}
int leftHelpItems = item;
for (item = 0; helpRight[item].key; item++) {
attrset(CRT_colors[HELP_BOLD]);
attrset((helpRight[item].roInactive && readonly) ? CRT_colors[HELP_SHADOW] : CRT_colors[HELP_BOLD]);
mvaddstr(line + item, 41, helpRight[item].key);
attrset(CRT_colors[DEFAULT_COLOR]);
attrset((helpRight[item].roInactive && readonly) ? CRT_colors[HELP_SHADOW] : CRT_colors[DEFAULT_COLOR]);
mvaddstr(line + item, 50, helpRight[item].info);
}
line += MAXIMUM(leftHelpItems, item);

6
CRT.c
View File

@ -166,6 +166,7 @@ static int CRT_colorSchemes[LAST_COLORSCHEME][LAST_COLORELEMENT] = {
[LOAD_AVERAGE_ONE] = A_BOLD | ColorPair(White, Black),
[LOAD] = A_BOLD,
[HELP_BOLD] = A_BOLD | ColorPair(Cyan, Black),
[HELP_SHADOW] = A_BOLD | ColorPairGrayBlack,
[CLOCK] = A_BOLD,
[DATE] = A_BOLD,
[DATETIME] = A_BOLD,
@ -258,6 +259,7 @@ static int CRT_colorSchemes[LAST_COLORSCHEME][LAST_COLORELEMENT] = {
[LOAD_AVERAGE_ONE] = A_BOLD,
[LOAD] = A_BOLD,
[HELP_BOLD] = A_BOLD,
[HELP_SHADOW] = A_DIM,
[CLOCK] = A_BOLD,
[DATE] = A_BOLD,
[DATETIME] = A_BOLD,
@ -350,6 +352,7 @@ static int CRT_colorSchemes[LAST_COLORSCHEME][LAST_COLORELEMENT] = {
[LOAD_AVERAGE_ONE] = ColorPair(Black, White),
[LOAD] = ColorPair(Black, White),
[HELP_BOLD] = ColorPair(Blue, White),
[HELP_SHADOW] = A_BOLD | ColorPair(Black, White),
[CLOCK] = ColorPair(Black, White),
[DATE] = ColorPair(Black, White),
[DATETIME] = ColorPair(Black, White),
@ -442,6 +445,7 @@ static int CRT_colorSchemes[LAST_COLORSCHEME][LAST_COLORELEMENT] = {
[LOAD_AVERAGE_ONE] = ColorPair(Black, Black),
[LOAD] = ColorPairWhiteDefault,
[HELP_BOLD] = ColorPair(Blue, Black),
[HELP_SHADOW] = A_BOLD | ColorPairGrayBlack,
[CLOCK] = ColorPairWhiteDefault,
[DATE] = ColorPairWhiteDefault,
[DATETIME] = ColorPairWhiteDefault,
@ -534,6 +538,7 @@ static int CRT_colorSchemes[LAST_COLORSCHEME][LAST_COLORELEMENT] = {
[LOAD_AVERAGE_ONE] = A_BOLD | ColorPair(White, Blue),
[LOAD] = A_BOLD | ColorPair(White, Blue),
[HELP_BOLD] = A_BOLD | ColorPair(Cyan, Blue),
[HELP_SHADOW] = A_BOLD | ColorPair(Black, Blue),
[CLOCK] = ColorPair(White, Blue),
[DATE] = ColorPair(White, Blue),
[DATETIME] = ColorPair(White, Blue),
@ -626,6 +631,7 @@ static int CRT_colorSchemes[LAST_COLORSCHEME][LAST_COLORELEMENT] = {
[LOAD_AVERAGE_ONE] = A_BOLD | ColorPair(Green, Black),
[LOAD] = A_BOLD,
[HELP_BOLD] = A_BOLD | ColorPair(Cyan, Black),
[HELP_SHADOW] = A_BOLD | ColorPairGrayBlack,
[CLOCK] = ColorPair(Green, Black),
[CHECK_BOX] = ColorPair(Green, Black),
[CHECK_MARK] = A_BOLD | ColorPair(Green, Black),

1
CRT.h
View File

@ -109,6 +109,7 @@ typedef enum ColorElements_ {
DATE,
DATETIME,
HELP_BOLD,
HELP_SHADOW,
HOSTNAME,
CPU_NICE,
CPU_NICE_TEXT,

10
CommandLine.c
View File

@ -53,6 +53,7 @@ static void printHelpFlag(const char* name) {
"-H --highlight-changes[=DELAY] Highlight new and old processes\n"
"-M --no-mouse Disable the mouse\n"
"-p --pid=PID[,PID,PID...] Show only the given PIDs\n"
" --readonly Disable all system and process changing features\n"
"-s --sort-key=COLUMN Sort by COLUMN in list view (try --sort-key=help for a list)\n"
"-t --tree Show the tree view (can be combined with -s)\n"
"-u --user[=USERNAME] Show only processes for a given user (or $USER)\n"
@ -79,6 +80,7 @@ typedef struct CommandLineSettings_ {
bool allowUnicode;
bool highlightChanges;
int highlightDelaySecs;
bool readonly;
} CommandLineSettings;
static CommandLineSettings parseArguments(const char* program, int argc, char** argv) {
@ -95,6 +97,7 @@ static CommandLineSettings parseArguments(const char* program, int argc, char**
.allowUnicode = true,
.highlightChanges = false,
.highlightDelaySecs = -1,
.readonly = false,
};
const struct option long_opts[] =
@ -112,6 +115,7 @@ static CommandLineSettings parseArguments(const char* program, int argc, char**
{"pid", required_argument, 0, 'p'},
{"filter", required_argument, 0, 'F'},
{"highlight-changes", optional_argument, 0, 'H'},
{"readonly", no_argument, 0, 128},
PLATFORM_LONG_OPTIONS
{0,0,0,0}
};
@ -231,6 +235,9 @@ static CommandLineSettings parseArguments(const char* program, int argc, char**
flags.highlightChanges = true;
break;
}
case 128:
flags.readonly = true;
break;
default:
if (Platform_getLongOption(opt, argc, argv) == false)
@ -273,6 +280,9 @@ int CommandLine_run(const char* name, int argc, char** argv) {
CommandLineSettings flags = parseArguments(name, argc, argv);
if (flags.readonly)
Settings_enableReadonly();
Platform_init();
Process_setupColumnWidths();

3
MainPanel.c
View File

@ -22,6 +22,7 @@ in the source distribution for its full text.
static const char* const MainFunctions[] = {"Help ", "Setup ", "Search", "Filter", "Tree ", "SortBy", "Nice -", "Nice +", "Kill ", "Quit ", NULL};
static const char* const MainFunctions_ro[] = {"Help ", "Setup ", "Search", "Filter", "Tree ", "SortBy", " ", " ", " ", "Quit ", NULL};
void MainPanel_updateTreeFunctions(MainPanel* this, bool mode) {
FunctionBar* bar = MainPanel_getFunctionBar(this);
@ -195,7 +196,7 @@ const PanelClass MainPanel_class = {
MainPanel* MainPanel_new() {
MainPanel* this = AllocThis(MainPanel);
Panel_init((Panel*) this, 1, 1, 1, 1, Class(Process), false, FunctionBar_new(MainFunctions, NULL, NULL));
Panel_init((Panel*) this, 1, 1, 1, 1, Class(Process), false, FunctionBar_new(Settings_isReadonly() ? MainFunctions_ro : MainFunctions, NULL, NULL));
this->keys = xCalloc(KEY_MAX, sizeof(Htop_Action));
this->inc = IncSet_new(MainPanel_getFunctionBar(this));

3
Process.c
View File

@ -482,6 +482,9 @@ bool Process_isTomb(const Process* this) {
}
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);

10
Settings.c
View File

@ -472,3 +472,13 @@ void Settings_setSortKey(Settings* this, ProcessField sortKey) {
this->treeDirection = (Process_fields[sortKey].defaultSortDesc) ? -1 : 1;
}
}
static bool readonly = false;
void Settings_enableReadonly(void) {
readonly = true;
}
bool Settings_isReadonly(void) {
return readonly;
}

4
Settings.h
View File

@ -95,4 +95,8 @@ void Settings_invertSortOrder(Settings* this);
void Settings_setSortKey(Settings* this, ProcessField sortKey);
void Settings_enableReadonly(void);
bool Settings_isReadonly(void);
#endif

3
htop.1.in
View File

@ -54,6 +54,9 @@ Do not use unicode but ASCII characters for graph meters
\fB\-M \-\-no-mouse\fR
Disable support of mouse control
.TP
\fB\-\-readonly\fR
Disable all system and process changing features
.TP
\fB\-V \-\-version
Output version information and exit
.TP

5
linux/Platform.c
View File

@ -130,6 +130,9 @@ static enum CapMode Platform_capabilitiesMode = CAP_MODE_BASIC;
#endif
static Htop_Reaction Platform_actionSetIOPriority(State* st) {
if (Settings_isReadonly())
return HTOP_OK;
const LinuxProcess* p = (const LinuxProcess*) Panel_getSelected((Panel*)st->mainPanel);
if (!p)
return HTOP_OK;
@ -873,7 +876,7 @@ bool Platform_getLongOption(int opt, int argc, char** argv) {
switch (opt) {
#ifdef HAVE_LIBCAP
case 128: {
case 160: {
const char* mode = optarg;
if (!mode && optind < argc && argv[optind] != NULL &&
(argv[optind][0] != '\0' && argv[optind][0] != '-')) {

2
linux/Platform.h
View File

@ -85,7 +85,7 @@ static inline void Platform_getRelease(char** string) {
#ifdef HAVE_LIBCAP
#define PLATFORM_LONG_OPTIONS \
{"drop-capabilities", optional_argument, 0, 128},
{"drop-capabilities", optional_argument, 0, 160},
#else
#define PLATFORM_LONG_OPTIONS
#endif

3
linux/SystemdMeter.c
View File

@ -195,6 +195,9 @@ dlfailure:
#endif /* !BUILD_STATIC || HAVE_LIBSYSTEMD */
static void updateViaExec(void) {
if (Settings_isReadonly())
return;
int fdpair[2];
if (pipe(fdpair) < 0)
return;