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08829cbc3b
gcc gives warnings like this: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result Assign value to a variable, cast to (void) to discard it.
230 lines
6.6 KiB
C
230 lines
6.6 KiB
C
/*
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htop - TraceScreen.c
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(C) 2005-2006 Hisham H. Muhammad
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Released under the GNU GPL, 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 "TraceScreen.h"
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#include "CRT.h"
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#include "ProcessList.h"
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#include "ListItem.h"
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#include "IncSet.h"
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#include "String.h"
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#include "FunctionBar.h"
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#include <stdio.h>
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#include <unistd.h>
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#include <string.h>
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#include <stdlib.h>
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#include <stdbool.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <sys/types.h>
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#include <sys/wait.h>
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#include <signal.h>
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/*{
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#include "Process.h"
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#include "Panel.h"
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typedef struct TraceScreen_ {
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Process* process;
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Panel* display;
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bool tracing;
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} TraceScreen;
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}*/
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static const char* TraceScreenFunctions[] = {"Search ", "Filter ", "AutoScroll ", "Stop Tracing ", "Done ", NULL};
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static const char* TraceScreenKeys[] = {"F3", "F4", "F8", "F9", "Esc"};
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static int TraceScreenEvents[] = {KEY_F(3), KEY_F(4), KEY_F(8), KEY_F(9), 27};
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TraceScreen* TraceScreen_new(Process* process) {
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TraceScreen* this = (TraceScreen*) malloc(sizeof(TraceScreen));
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this->process = process;
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FunctionBar* fuBar = FunctionBar_new(TraceScreenFunctions, TraceScreenKeys, TraceScreenEvents);
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this->display = Panel_new(0, 1, COLS, LINES-2, false, Class(ListItem), fuBar);
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this->tracing = true;
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return this;
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}
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void TraceScreen_delete(TraceScreen* this) {
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Panel_delete((Object*)this->display);
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free(this);
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}
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static void TraceScreen_draw(TraceScreen* this, IncSet* inc) {
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attrset(CRT_colors[PANEL_HEADER_FOCUS]);
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mvhline(0, 0, ' ', COLS);
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mvprintw(0, 0, "Trace of process %d - %s", this->process->pid, this->process->comm);
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attrset(CRT_colors[DEFAULT_COLOR]);
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IncSet_drawBar(inc);
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}
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static inline void addLine(const char* line, Vector* lines, Panel* panel, const char* incFilter) {
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Vector_add(lines, (Object*) ListItem_new(line, 0));
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if (!incFilter || String_contains_i(line, incFilter))
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Panel_add(panel, (Object*)Vector_get(lines, Vector_size(lines)-1));
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}
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static inline void appendLine(const char* line, Vector* lines, Panel* panel, const char* incFilter) {
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ListItem* last = (ListItem*)Vector_get(lines, Vector_size(lines)-1);
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ListItem_append(last, line);
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if (incFilter && Panel_get(panel, Panel_size(panel)-1) != (Object*)last && String_contains_i(line, incFilter))
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Panel_add(panel, (Object*)last);
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}
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void TraceScreen_run(TraceScreen* this) {
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char buffer[1001];
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int fdpair[2];
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int err = pipe(fdpair);
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if (err == -1) return;
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int child = fork();
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if (child == -1) return;
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if (child == 0) {
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dup2(fdpair[1], STDERR_FILENO);
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int ok = fcntl(fdpair[1], F_SETFL, O_NONBLOCK);
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if (ok != -1) {
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sprintf(buffer, "%d", this->process->pid);
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execlp("strace", "strace", "-p", buffer, NULL);
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}
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const char* message = "Could not execute 'strace'. Please make sure it is available in your $PATH.";
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ssize_t written = write(fdpair[1], message, strlen(message));
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(void) written;
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exit(1);
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}
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fcntl(fdpair[0], F_SETFL, O_NONBLOCK);
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FILE* strace = fdopen(fdpair[0], "r");
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Panel* panel = this->display;
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int fd_strace = fileno(strace);
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CRT_disableDelay();
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bool contLine = false;
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bool follow = false;
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bool looping = true;
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FunctionBar* bar = panel->defaultBar;
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IncSet* inc = IncSet_new(bar);
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Vector* lines = Vector_new(panel->items->type, true, DEFAULT_SIZE);
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TraceScreen_draw(this, inc);
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while (looping) {
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Panel_draw(panel, true);
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const char* incFilter = IncSet_filter(inc);
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if (inc->active)
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move(LINES-1, CRT_cursorX);
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int ch = getch();
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if (ch == ERR) {
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fd_set fds;
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FD_ZERO(&fds);
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// FD_SET(STDIN_FILENO, &fds);
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FD_SET(fd_strace, &fds);
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struct timeval tv;
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tv.tv_sec = 0; tv.tv_usec = 500;
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int ready = select(fd_strace+1, &fds, NULL, NULL, &tv);
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int nread = 0;
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if (ready > 0 && FD_ISSET(fd_strace, &fds))
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nread = fread(buffer, 1, 1000, strace);
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if (nread && this->tracing) {
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char* line = buffer;
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buffer[nread] = '\0';
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for (int i = 0; i < nread; i++) {
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if (buffer[i] == '\n') {
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buffer[i] = '\0';
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if (contLine) {
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appendLine(line, lines, panel, incFilter);
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contLine = false;
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} else {
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addLine(line, lines, panel, incFilter);
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}
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line = buffer+i+1;
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}
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}
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if (line < buffer+nread) {
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addLine(line, lines, panel, incFilter);
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buffer[nread] = '\0';
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contLine = true;
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}
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if (follow)
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Panel_setSelected(panel, Panel_size(panel)-1);
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}
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}
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if (ch == KEY_MOUSE) {
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MEVENT mevent;
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int ok = getmouse(&mevent);
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if (ok == OK)
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if (mevent.y >= panel->y && mevent.y < LINES - 1) {
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Panel_setSelected(panel, mevent.y - panel->y + panel->scrollV);
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follow = false;
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ch = 0;
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} if (mevent.y == LINES - 1)
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ch = IncSet_synthesizeEvent(inc, mevent.x);
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}
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if (inc->active) {
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IncSet_handleKey(inc, ch, panel, IncSet_getListItemValue, lines);
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continue;
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}
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switch(ch) {
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case ERR:
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continue;
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case KEY_HOME:
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Panel_setSelected(panel, 0);
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break;
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case KEY_END:
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Panel_setSelected(panel, Panel_size(panel)-1);
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break;
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case KEY_F(3):
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case '/':
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IncSet_activate(inc, INC_SEARCH, panel);
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break;
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case KEY_F(4):
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case '\\':
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IncSet_activate(inc, INC_FILTER, panel);
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break;
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case 'f':
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case KEY_F(8):
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follow = !follow;
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if (follow)
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Panel_setSelected(panel, Panel_size(panel)-1);
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break;
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case 't':
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case KEY_F(9):
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this->tracing = !this->tracing;
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FunctionBar_setLabel(bar, KEY_F(9), this->tracing?"Stop Tracing ":"Resume Tracing ");
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TraceScreen_draw(this, inc);
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break;
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case 'q':
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case 27:
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case KEY_F(10):
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looping = false;
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break;
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case KEY_RESIZE:
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Panel_resize(panel, COLS, LINES-2);
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TraceScreen_draw(this, inc);
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break;
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default:
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follow = false;
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Panel_onKey(panel, ch);
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}
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}
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IncSet_delete(inc);
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Vector_delete(lines);
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kill(child, SIGTERM);
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waitpid(child, NULL, 0);
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fclose(strace);
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CRT_enableDelay();
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}
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