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/*
htop - TraceScreen.c
(C) 2005-2006 Hisham H. Muhammad
Released under the GNU GPL, see the COPYING file
in the source distribution for its full text.
*/
#define _GNU_SOURCE
#include <stdio.h>
#include <unistd.h>
#include <stdbool.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/wait.h>
#include "TraceScreen.h"
#include "ProcessList.h"
#include "Process.h"
#include "ListItem.h"
#include "Panel.h"
#include "FunctionBar.h"
/*{
typedef struct TraceScreen_ {
Process* process;
Panel* display;
FunctionBar* bar;
bool tracing;
} TraceScreen;
}*/
static char* tbFunctions[3] = {"AutoScroll ", "Stop Tracing ", "Done "};
static char* tbKeys[3] = {"F4", "F5", "Esc"};
static int tbEvents[3] = {KEY_F(4), KEY_F(5), 27};
TraceScreen* TraceScreen_new(Process* process) {
TraceScreen* this = (TraceScreen*) malloc(sizeof(TraceScreen));
this->process = process;
this->display = Panel_new(0, 1, COLS, LINES-2, LISTITEM_CLASS, true, ListItem_compare);
this->bar = FunctionBar_new(3, tbFunctions, tbKeys, tbEvents);
this->tracing = true;
return this;
}
void TraceScreen_delete(TraceScreen* this) {
Panel_delete((Object*)this->display);
FunctionBar_delete((Object*)this->bar);
free(this);
}
void TraceScreen_draw(TraceScreen* this) {
attrset(CRT_colors[PANEL_HEADER_FOCUS]);
mvhline(0, 0, ' ', COLS);
mvprintw(0, 0, "Trace of process %d - %s", this->process->pid, this->process->comm);
attrset(CRT_colors[DEFAULT_COLOR]);
FunctionBar_draw(this->bar, NULL);
}
void TraceScreen_run(TraceScreen* this) {
// if (this->process->pid == getpid()) return;
char buffer[1001];
int fdpair[2];
int err = pipe(fdpair);
if (err == -1) return;
int child = fork();
if (child == -1) return;
if (child == 0) {
dup2(fdpair[1], STDERR_FILENO);
fcntl(fdpair[1], F_SETFL, O_NONBLOCK);
sprintf(buffer, "%d", this->process->pid);
execlp("strace", "strace", "-p", buffer, NULL);
const char* message = "Could not execute 'strace'. Please make sure it is available in your $PATH.";
write(fdpair[1], message, strlen(message));
exit(1);
}
fcntl(fdpair[0], F_SETFL, O_NONBLOCK);
FILE* strace = fdopen(fdpair[0], "r");
Panel* panel = this->display;
int fd_strace = fileno(strace);
TraceScreen_draw(this);
CRT_disableDelay();
bool contLine = false;
bool follow = false;
bool looping = true;
while (looping) {
fd_set fds;
FD_ZERO(&fds);
FD_SET(fd_strace, &fds);
struct timeval tv;
tv.tv_sec = 0; tv.tv_usec = 500;
int ready = select(fd_strace+1, &fds, NULL, NULL, &tv);
int nread = 0;
if (ready > 0)
nread = fread(buffer, 1, 1000, strace);
if (nread && this->tracing) {
char* line = buffer;
buffer[nread] = '\0';
for (int i = 0; i < nread; i++) {
if (buffer[i] == '\n') {
buffer[i] = '\0';
if (contLine) {
ListItem_append((ListItem*)Panel_get(panel,
Panel_getSize(panel)-1), line);
contLine = false;
} else {
Panel_add(panel, (Object*) ListItem_new(line, 0));
}
line = buffer+i+1;
}
}
if (line < buffer+nread) {
Panel_add(panel, (Object*) ListItem_new(line, 0));
buffer[nread] = '\0';
contLine = true;
}
if (follow)
Panel_setSelected(panel, Panel_getSize(panel)-1);
Panel_draw(panel, true);
}
int ch = getch();
if (ch == KEY_MOUSE) {
MEVENT mevent;
int ok = getmouse(&mevent);
if (ok == OK)
if (mevent.y >= panel->y && mevent.y < LINES - 1) {
Panel_setSelected(panel, mevent.y - panel->y + panel->scrollV);
follow = false;
ch = 0;
} if (mevent.y == LINES - 1)
ch = FunctionBar_synthesizeEvent(this->bar, mevent.x);
}
switch(ch) {
case ERR:
continue;
case KEY_F(5):
this->tracing = !this->tracing;
FunctionBar_setLabel(this->bar, KEY_F(5), this->tracing?"Stop Tracing ":"Resume Tracing ");
TraceScreen_draw(this);
break;
case 'f':
case KEY_F(4):
follow = !follow;
if (follow)
Panel_setSelected(panel, Panel_getSize(panel)-1);
break;
case 'q':
case 27:
looping = false;
break;
case KEY_RESIZE:
Panel_resize(panel, COLS, LINES-2);
TraceScreen_draw(this);
break;
default:
follow = false;
Panel_onKey(panel, ch);
}
Panel_draw(panel, true);
}
kill(child, SIGTERM);
waitpid(child, NULL, 0);
fclose(strace);
}
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