htop/OpenFilesScreen.c

169 lines
4.6 KiB
C

/*
htop - OpenFilesScreen.c
(C) 2005-2006 Hisham H. Muhammad
Released under the GNU GPL, see the COPYING file
in the source distribution for its full text.
*/
#include "OpenFilesScreen.h"
#include "CRT.h"
#include "ProcessList.h"
#include "IncSet.h"
#include "StringUtils.h"
#include "FunctionBar.h"
#include <string.h>
#include <stdio.h>
#include <unistd.h>
#include <stdbool.h>
#include <unistd.h>
#include <stdlib.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/wait.h>
InfoScreenClass OpenFilesScreen_class = {
.super = {
.extends = Class(Object),
.delete = OpenFilesScreen_delete
},
.scan = OpenFilesScreen_scan,
.draw = OpenFilesScreen_draw
};
OpenFilesScreen* OpenFilesScreen_new(Process* process) {
OpenFilesScreen* this = xMalloc(sizeof(OpenFilesScreen));
Object_setClass(this, Class(OpenFilesScreen));
if (Process_isThread(process))
this->pid = process->tgid;
else
this->pid = process->pid;
return (OpenFilesScreen*) InfoScreen_init(&this->super, process, NULL, LINES-3, " FD TYPE DEVICE SIZE NODE NAME");
}
void OpenFilesScreen_delete(Object* this) {
free(InfoScreen_done((InfoScreen*)this));
}
void OpenFilesScreen_draw(InfoScreen* this) {
InfoScreen_drawTitled(this, "Snapshot of files open in process %d - %s", ((OpenFilesScreen*)this)->pid, this->process->comm);
}
static OpenFiles_ProcessData* OpenFilesScreen_getProcessData(pid_t pid) {
OpenFiles_ProcessData* pdata = xCalloc(1, sizeof(OpenFiles_ProcessData));
int fdpair[2] = {0, 0};
if (pipe(fdpair) == -1) {
pdata->error = 1;
return pdata;
}
pid_t child = fork();
if (child == -1) {
close(fdpair[1]);
close(fdpair[0]);
pdata->error = 1;
return pdata;
}
if (child == 0) {
close(fdpair[0]);
dup2(fdpair[1], STDOUT_FILENO);
close(fdpair[1]);
int fdnull = open("/dev/null", O_WRONLY);
if (fdnull < 0)
exit(1);
dup2(fdnull, STDERR_FILENO);
close(fdnull);
char buffer[32] = {0};
xSnprintf(buffer, sizeof(buffer), "%d", pid);
execlp("lsof", "lsof", "-P", "-p", buffer, "-F", NULL);
exit(127);
}
close(fdpair[1]);
OpenFiles_Data* item = &(pdata->data);
OpenFiles_FileData* fdata = NULL;
FILE* fd = fdopen(fdpair[0], "r");
for (;;) {
char* line = String_readLine(fd);
if (!line) {
break;
}
unsigned char cmd = line[0];
if (cmd == 'f') {
OpenFiles_FileData* nextFile = xCalloc(1, sizeof(OpenFiles_FileData));
if (fdata == NULL) {
pdata->files = nextFile;
} else {
fdata->next = nextFile;
}
fdata = nextFile;
item = &(fdata->data);
}
item->data[cmd] = xStrdup(line + 1);
free(line);
}
fclose(fd);
int wstatus;
if (waitpid(child, &wstatus, 0) == -1) {
pdata->error = 1;
return pdata;
}
if (!WIFEXITED(wstatus))
pdata->error = 1;
else
pdata->error = WEXITSTATUS(wstatus);
return pdata;
}
static inline void OpenFiles_Data_clear(OpenFiles_Data* data) {
for (int i = 0; i < 255; i++)
if (data->data[i])
free(data->data[i]);
}
void OpenFilesScreen_scan(InfoScreen* this) {
Panel* panel = this->display;
int idx = Panel_getSelectedIndex(panel);
Panel_prune(panel);
OpenFiles_ProcessData* pdata = OpenFilesScreen_getProcessData(((OpenFilesScreen*)this)->pid);
if (pdata->error == 127) {
InfoScreen_addLine(this, "Could not execute 'lsof'. Please make sure it is available in your $PATH.");
} else if (pdata->error == 1) {
InfoScreen_addLine(this, "Failed listing open files.");
} else {
OpenFiles_FileData* fdata = pdata->files;
while (fdata) {
char** data = fdata->data.data;
int lenN = data['n'] ? strlen(data['n']) : 0;
int sizeEntry = 5 + 7 + 10 + 10 + 10 + lenN + 5 /*spaces*/ + 1 /*null*/;
char entry[sizeEntry];
xSnprintf(entry, sizeEntry, "%5.5s %7.7s %10.10s %10.10s %10.10s %s",
data['f'] ? data['f'] : "",
data['t'] ? data['t'] : "",
data['D'] ? data['D'] : "",
data['s'] ? data['s'] : "",
data['i'] ? data['i'] : "",
data['n'] ? data['n'] : "");
InfoScreen_addLine(this, entry);
OpenFiles_Data_clear(&fdata->data);
OpenFiles_FileData* old = fdata;
fdata = fdata->next;
free(old);
}
OpenFiles_Data_clear(&pdata->data);
}
free(pdata);
Vector_insertionSort(this->lines);
Vector_insertionSort(panel->items);
Panel_setSelected(panel, idx);
}