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htop/CommandLine.c

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/*
htop - CommandLine.c
(C) 2004-2011 Hisham H. Muhammad
(C) 2020-2021 htop dev team
Released under the GNU GPLv2+, see the COPYING file
in the source distribution for its full text.
*/
#include "config.h" // IWYU pragma: keep
#include "CommandLine.h"
#include <assert.h>
#include <ctype.h>
#include <getopt.h>
#include <locale.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include "Action.h"
#include "CRT.h"
#include "DynamicColumn.h"
#include "DynamicMeter.h"
#include "Hashtable.h"
#include "Header.h"
#include "IncSet.h"
#include "MainPanel.h"
#include "MetersPanel.h"
#include "Panel.h"
#include "Platform.h"
#include "Process.h"
#include "ProcessList.h"
#include "ProvideCurses.h"
#include "ScreenManager.h"
#include "Settings.h"
#include "UsersTable.h"
#include "XUtils.h"
static void printVersionFlag(const char* name) {
printf("%s " VERSION "\n", name);
}
static void printHelpFlag(const char* name) {
printf("%s " VERSION "\n"
COPYRIGHT "\n"
"Released under the GNU GPLv2+.\n\n"
"-C --no-color Use a monochrome color scheme\n"
"-d --delay=DELAY Set the delay between updates, in tenths of seconds\n"
"-F --filter=FILTER Show only the commands matching the given filter\n"
"-h --help Print this help screen\n"
"-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"
"-U --no-unicode Do not use unicode but plain ASCII\n"
"-V --version Print version info\n", name);
Platform_longOptionsUsage(name);
printf("\n"
"Long options may be passed with a single dash.\n\n"
"Press F1 inside %s for online help.\n"
"See 'man %s' for more information.\n", name, name);
}
// ----------------------------------------
typedef struct CommandLineSettings_ {
Hashtable* pidMatchList;
char* commFilter;
uid_t userId;
int sortKey;
int delay;
bool useColors;
bool enableMouse;
bool treeView;
bool allowUnicode;
bool highlightChanges;
int highlightDelaySecs;
bool readonly;
} CommandLineSettings;
static CommandLineStatus parseArguments(const char* program, int argc, char** argv, CommandLineSettings* flags) {
*flags = (CommandLineSettings) {
.pidMatchList = NULL,
.commFilter = NULL,
.userId = (uid_t)-1, // -1 is guaranteed to be an invalid uid_t (see setreuid(2))
.sortKey = 0,
.delay = -1,
.useColors = true,
.enableMouse = true,
.treeView = false,
.allowUnicode = true,
.highlightChanges = false,
.highlightDelaySecs = -1,
.readonly = false,
};
const struct option long_opts[] =
{
{"help", no_argument, 0, 'h'},
{"version", no_argument, 0, 'V'},
{"delay", required_argument, 0, 'd'},
{"sort-key", required_argument, 0, 's'},
{"user", optional_argument, 0, 'u'},
{"no-color", no_argument, 0, 'C'},
{"no-colour", no_argument, 0, 'C'},
{"no-mouse", no_argument, 0, 'M'},
{"no-unicode", no_argument, 0, 'U'},
{"tree", no_argument, 0, 't'},
{"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}
};
int opt, opti = 0;
/* Parse arguments */
while ((opt = getopt_long(argc, argv, "hVMCs:td:u::Up:F:H::", long_opts, &opti))) {
if (opt == EOF)
break;
switch (opt) {
case 'h':
printHelpFlag(program);
return STATUS_OK_EXIT;
case 'V':
printVersionFlag(program);
return STATUS_OK_EXIT;
case 's':
assert(optarg); /* please clang analyzer, cause optarg can be NULL in the 'u' case */
if (String_eq(optarg, "help")) {
for (int j = 1; j < LAST_PROCESSFIELD; j++) {
const char* name = Process_fields[j].name;
const char* description = Process_fields[j].description;
if (name) printf("%19s %s\n", name, description);
}
return STATUS_OK_EXIT;
}
flags->sortKey = 0;
for (int j = 1; j < LAST_PROCESSFIELD; j++) {
if (Process_fields[j].name == NULL)
continue;
if (String_eq(optarg, Process_fields[j].name)) {
flags->sortKey = j;
break;
}
}
if (flags->sortKey == 0) {
fprintf(stderr, "Error: invalid column \"%s\".\n", optarg);
return STATUS_ERROR_EXIT;
}
break;
case 'd':
if (sscanf(optarg, "%16d", &(flags->delay)) == 1) {
if (flags->delay < 1) flags->delay = 1;
if (flags->delay > 100) flags->delay = 100;
} else {
fprintf(stderr, "Error: invalid delay value \"%s\".\n", optarg);
return STATUS_ERROR_EXIT;
}
break;
case 'u':
{
const char *username = optarg;
if (!username && optind < argc && argv[optind] != NULL &&
(argv[optind][0] != '\0' && argv[optind][0] != '-')) {
username = argv[optind++];
}
if (!username) {
flags->userId = geteuid();
} else if (!Action_setUserOnly(username, &(flags->userId))) {
for (const char *itr = username; *itr; ++itr)
if (!isdigit((unsigned char)*itr)) {
fprintf(stderr, "Error: invalid user \"%s\".\n", username);
return STATUS_ERROR_EXIT;
}
flags->userId = atol(username);
}
break;
}
case 'C':
flags->useColors = false;
break;
case 'M':
#ifdef HAVE_GETMOUSE
flags->enableMouse = false;
#endif
break;
case 'U':
flags->allowUnicode = false;
break;
case 't':
flags->treeView = true;
break;
case 'p': {
assert(optarg); /* please clang analyzer, cause optarg can be NULL in the 'u' case */
char* argCopy = xStrdup(optarg);
char* saveptr;
const char* pid = strtok_r(argCopy, ",", &saveptr);
if (!flags->pidMatchList) {
flags->pidMatchList = Hashtable_new(8, false);
}
while(pid) {
unsigned int num_pid = atoi(pid);
// deepcode ignore CastIntegerToAddress: we just want a non-NULL pointer here
Hashtable_put(flags->pidMatchList, num_pid, (void *) 1);
pid = strtok_r(NULL, ",", &saveptr);
}
free(argCopy);
break;
}
case 'F': {
assert(optarg);
free_and_xStrdup(&flags->commFilter, optarg);
break;
}
case 'H': {
const char *delay = optarg;
if (!delay && optind < argc && argv[optind] != NULL &&
(argv[optind][0] != '\0' && argv[optind][0] != '-')) {
delay = argv[optind++];
}
if (delay) {
if (sscanf(delay, "%16d", &(flags->highlightDelaySecs)) == 1) {
if (flags->highlightDelaySecs < 1)
flags->highlightDelaySecs = 1;
} else {
fprintf(stderr, "Error: invalid highlight delay value \"%s\".\n", delay);
return STATUS_ERROR_EXIT;
}
}
flags->highlightChanges = true;
break;
}
case 128:
flags->readonly = true;
break;
default: {
CommandLineStatus status;
if ((status = Platform_getLongOption(opt, argc, argv)) != STATUS_OK)
return status;
break;
}
}
}
return STATUS_OK;
}
static void CommandLine_delay(ProcessList* pl, unsigned long millisec) {
struct timespec req = {
.tv_sec = 0,
.tv_nsec = millisec * 1000000L
};
while (nanosleep(&req, &req) == -1)
continue;
Platform_gettime_realtime(&pl->realtime, &pl->realtimeMs);
}
static void setCommFilter(State* state, char** commFilter) {
ProcessList* pl = state->pl;
IncSet* inc = state->mainPanel->inc;
IncSet_setFilter(inc, *commFilter);
pl->incFilter = IncSet_filter(inc);
free(*commFilter);
*commFilter = NULL;
}
int CommandLine_run(const char* name, int argc, char** argv) {
/* initialize locale */
const char* lc_ctype;
if ((lc_ctype = getenv("LC_CTYPE")) || (lc_ctype = getenv("LC_ALL")))
setlocale(LC_CTYPE, lc_ctype);
else
setlocale(LC_CTYPE, "");
CommandLineStatus status = STATUS_OK;
CommandLineSettings flags = { 0 };
if ((status = parseArguments(name, argc, argv, &flags)) != STATUS_OK)
return status != STATUS_OK_EXIT ? 1 : 0;
if (flags.readonly)
Settings_enableReadonly();
if (!Platform_init())
return 1;
Process_setupColumnWidths();
UsersTable* ut = UsersTable_new();
Hashtable* dc = DynamicColumns_new();
Hashtable* dm = DynamicMeters_new();
if (!dc)
dc = Hashtable_new(0, true);
ProcessList* pl = ProcessList_new(ut, dm, dc, flags.pidMatchList, flags.userId);
Settings* settings = Settings_new(pl->activeCPUs, dc);
pl->settings = settings;
Header* header = Header_new(pl, settings, 2);
Header_populateFromSettings(header);
if (flags.delay != -1)
settings->delay = flags.delay;
if (!flags.useColors)
settings->colorScheme = COLORSCHEME_MONOCHROME;
#ifdef HAVE_GETMOUSE
if (!flags.enableMouse)
settings->enableMouse = false;
#endif
if (flags.treeView)
settings->ss->treeView = true;
if (flags.highlightChanges)
settings->highlightChanges = true;
if (flags.highlightDelaySecs != -1)
settings->highlightDelaySecs = flags.highlightDelaySecs;
if (flags.sortKey > 0) {
// -t -s <key> means "tree sorted by key"
// -s <key> means "list sorted by key" (previous existing behavior)
if (!flags.treeView) {
settings->ss->treeView = false;
}
ScreenSettings_setSortKey(settings->ss, flags.sortKey);
}
CRT_init(settings, flags.allowUnicode);
MainPanel* panel = MainPanel_new();
ProcessList_setPanel(pl, (Panel*) panel);
MainPanel_updateLabels(panel, settings->ss->treeView, flags.commFilter);
State state = {
.settings = settings,
.ut = ut,
.pl = pl,
.mainPanel = panel,
.header = header,
.pauseProcessUpdate = false,
.hideProcessSelection = false,
};
MainPanel_setState(panel, &state);
if (flags.commFilter)
setCommFilter(&state, &(flags.commFilter));
ScreenManager* scr = ScreenManager_new(header, settings, &state, true);
ScreenManager_add(scr, (Panel*) panel, -1);
ProcessList_scan(pl, false);
CommandLine_delay(pl, 75);
ProcessList_scan(pl, false);
if (settings->ss->allBranchesCollapsed)
ProcessList_collapseAllBranches(pl);
ScreenManager_run(scr, NULL, NULL, NULL);
Platform_done();
CRT_done();
if (settings->changed) {
int r = Settings_write(settings, false);
if (r < 0)
fprintf(stderr, "Can not save configuration to %s: %s\n", settings->filename, strerror(-r));
}
Header_delete(header);
ProcessList_delete(pl);
ScreenManager_delete(scr);
MetersPanel_cleanup();
UsersTable_delete(ut);
if (flags.pidMatchList)
Hashtable_delete(flags.pidMatchList);
CRT_resetSignalHandlers();
/* Delete these last, since they can get accessed in the crash handler */
Settings_delete(settings);
DynamicColumns_delete(dc);
DynamicMeters_delete(dm);
return 0;
}
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