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htop
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htop/htop.c

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/*
htop - htop.c
(C) 2004-2011 Hisham H. Muhammad
Released under the GNU GPLv2, see the COPYING file
in the source distribution for its full text.
*/
#include "config.h" // IWYU pragma: keep
#include <assert.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 "ColumnsPanel.h"
#include "CRT.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"
//#link m
static void printVersionFlag(void) {
fputs("htop " VERSION "\n", stdout);
}
static void printHelpFlag(void) {
fputs("htop " 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"
"-M --no-mouse Disable the mouse\n"
"-p --pid=PID,[,PID,PID...] Show only the given PIDs\n"
"-s --sort-key=COLUMN Sort by COLUMN (try --sort-key=help for a list)\n"
"-t --tree Show the tree view by default\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"
"\n"
"Long options may be passed with a single dash.\n\n"
"Press F1 inside htop for online help.\n"
"See 'man htop' for more information.\n",
stdout);
}
// ----------------------------------------
typedef struct CommandLineSettings_ {
Hashtable* pidMatchList;
char* commFilter;
uid_t userId;
int sortKey;
int delay;
bool useColors;
bool enableMouse;
bool treeView;
bool allowUnicode;
} CommandLineSettings;
static CommandLineSettings parseArguments(int argc, char** argv) {
CommandLineSettings flags = {
.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,
};
static 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'},
{0,0,0,0}
};
int opt, opti=0;
/* Parse arguments */
while ((opt = getopt_long(argc, argv, "hVMCs:td:u::Up:F:", long_opts, &opti))) {
if (opt == EOF) break;
switch (opt) {
case 'h':
printHelpFlag();
exit(0);
case 'V':
printVersionFlag();
exit(0);
case 's':
assert(optarg); /* please clang analyzer, cause optarg can be NULL in the 'u' case */
if (strcmp(optarg, "help") == 0) {
for (int j = 1; j < Platform_numberOfFields; j++) {
const char* name = Process_fields[j].name;
if (name) printf ("%s\n", name);
}
exit(0);
}
flags.sortKey = ColumnsPanel_fieldNameToIndex(optarg);
if (flags.sortKey == -1) {
fprintf(stderr, "Error: invalid column \"%s\".\n", optarg);
exit(1);
}
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);
exit(1);
}
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))) {
fprintf(stderr, "Error: invalid user \"%s\".\n", username);
exit(1);
}
break;
}
case 'C':
flags.useColors = false;
break;
case 'M':
flags.enableMouse = false;
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;
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);
flags.commFilter = xStrdup(optarg);
break;
}
default:
exit(1);
}
}
return flags;
}
static void millisleep(unsigned long millisec) {
struct timespec req = {
.tv_sec = 0,
.tv_nsec = millisec * 1000000L
};
while(nanosleep(&req,&req)==-1) {
continue;
}
}
static void setCommFilter(State* state, char** commFilter) {
MainPanel* panel = (MainPanel*)state->panel;
ProcessList* pl = state->pl;
IncSet* inc = panel->inc;
size_t maxlen = sizeof(inc->modes[INC_FILTER].buffer) - 1;
char* buffer = inc->modes[INC_FILTER].buffer;
strncpy(buffer, *commFilter, maxlen);
buffer[maxlen] = 0;
inc->modes[INC_FILTER].index = strlen(buffer);
inc->filtering = true;
pl->incFilter = IncSet_filter(inc);
free(*commFilter);
*commFilter = NULL;
}
int main(int argc, char** argv) {
char *lc_ctype = getenv("LC_CTYPE");
if(lc_ctype != NULL)
setlocale(LC_CTYPE, lc_ctype);
else if ((lc_ctype = getenv("LC_ALL")))
setlocale(LC_CTYPE, lc_ctype);
else
setlocale(LC_CTYPE, "");
CommandLineSettings flags = parseArguments(argc, argv); // may exit()
#ifdef HTOP_LINUX
if (access(PROCDIR, R_OK) != 0) {
fprintf(stderr, "Error: could not read procfs (compiled to look in %s).\n", PROCDIR);
exit(1);
}
#endif
Process_setupColumnWidths();
UsersTable* ut = UsersTable_new();
ProcessList* pl = ProcessList_new(ut, flags.pidMatchList, flags.userId);
Settings* settings = Settings_new(pl->cpuCount);
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;
if (!flags.enableMouse)
settings->enableMouse = false;
if (flags.treeView)
settings->treeView = true;
CRT_init(settings->delay, settings->colorScheme, flags.allowUnicode);
MainPanel* panel = MainPanel_new();
ProcessList_setPanel(pl, (Panel*) panel);
MainPanel_updateTreeFunctions(panel, settings->treeView);
if (flags.sortKey > 0) {
settings->sortKey = flags.sortKey;
settings->treeView = false;
settings->direction = 1;
}
ProcessList_printHeader(pl, Panel_getHeader((Panel*)panel));
State state = {
.settings = settings,
.ut = ut,
.pl = pl,
.panel = (Panel*) panel,
.header = header,
.pauseProcessUpdate = false,
};
MainPanel_setState(panel, &state);
if (flags.commFilter) {
setCommFilter(&state, &(flags.commFilter));
}
ScreenManager* scr = ScreenManager_new(0, header->height, 0, -1, HORIZONTAL, header, settings, &state, true);
ScreenManager_add(scr, (Panel*) panel, -1);
ProcessList_scan(pl);
millisleep(75);
ProcessList_scan(pl);
ScreenManager_run(scr, NULL, NULL);
attron(CRT_colors[RESET_COLOR]);
mvhline(LINES-1, 0, ' ', COLS);
attroff(CRT_colors[RESET_COLOR]);
refresh();
CRT_done();
if (settings->changed)
Settings_write(settings);
Header_delete(header);
ProcessList_delete(pl);
ScreenManager_delete(scr);
MetersPanel_cleanup();
UsersTable_delete(ut);
Settings_delete(settings);
if(flags.pidMatchList) {
Hashtable_delete(flags.pidMatchList);
}
return 0;
}
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