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/*
* lsfd-pidfd.c - handle pidfd (from anon_inode or pidfs)
*
* Copyright (C) 2024 Xi Ruoyao <xry111@xry111.site>
*
* Refactored and moved out from lsfd-unkn.c (originally authored by
* Masatake YAMATO <yamato@redhat.com>).
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it would be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <string.h>
#include "strutils.h"
#include "xalloc.h"
#include "lsfd.h"
#include "pidfd.h"
int pidfd_handle_fdinfo(struct pidfd_data *data, const char *key,
const char *value)
{
if (strcmp(key, "Pid") == 0) {
uint64_t pid;
int rc = ul_strtou64(value, &pid, 10);
if (rc < 0)
return 0; /* ignore -- parse failed */
data->pid = (pid_t)pid;
return 1;
} else if (strcmp(key, "NSpid") == 0) {
data->nspid = xstrdup(value);
return 1;
}
return 0;
}
char *pidfd_get_name(struct pidfd_data *data)
{
char *str = NULL;
char *comm = NULL;
struct proc *proc = get_proc(data->pid);
if (proc)
comm = proc->command;
xasprintf(&str, "pid=%d comm=%s nspid=%s",
data->pid,
comm ? comm : "",
data->nspid ? data->nspid : "");
return str;
}
bool pidfd_fill_column(struct pidfd_data *data, int column_id, char **str)
{
switch(column_id) {
case COL_PIDFD_COMM: {
struct proc *pidfd_proc = get_proc(data->pid);
char *pidfd_comm = NULL;
if (pidfd_proc)
pidfd_comm = pidfd_proc->command;
if (pidfd_comm) {
*str = xstrdup(pidfd_comm);
return true;
}
break;
}
case COL_PIDFD_NSPID:
if (data->nspid) {
*str = xstrdup(data->nspid);
return true;
}
break;
case COL_PIDFD_PID:
xasprintf(str, "%d", (int)data->pid);
return true;
}
return false;
}
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