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