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/*
* Copyright (C) 2023-2025 Colin Ian King.
*
* 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 will 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
#include "stress-ng.h"
#include "core-builtin.h"
#include "core-processes.h"
#include <ctype.h>
#include <pwd.h>
#if defined(__linux__)
/*
* stress_dump_processes_filter()
* filter out non-process filenames from /proc
*/
static int stress_dump_processes_filter(const struct dirent *d)
{
if (UNLIKELY(!d))
return 0;
return isdigit((int)d->d_name[0]);
}
/*
* stress_dump_processes()
* dump out names and state of running processes
*/
void stress_dump_processes(void)
{
int i, n, pid_width = 5;
struct dirent **namelist = NULL;
n = scandir("/proc", &namelist, stress_dump_processes_filter, alphasort);
if (UNLIKELY(n <= 0))
return;
for (i = 0; i < n; i++) {
const int len = strlen(namelist[i]->d_name);
pid_width = STRESS_MAXIMUM(pid_width, len);
}
for (i = 0; i < n; i++) {
char path[PATH_MAX];
struct stat statbuf;
char buf[8192];
char cmd[4096];
char state[16];
char name[32];
char *p_name;
pid_t pid, ppid;
ssize_t ret;
(void)shim_memset(cmd, 0, sizeof(cmd));
(void)snprintf(path, sizeof(path), "/proc/%s/cmdline", namelist[i]->d_name);
ret = stress_system_read(path, cmd, sizeof(cmd));
if (ret > 0) {
int j;
for (j = 0; j < (int)ret; j++) {
if (cmd[j] == '\0')
cmd[j] = ' ';
}
for (j--; j > 0; j--) {
if (cmd[j] == ' ')
cmd[j] = '\0';
else
break;
}
}
if (strstr(cmd, "stress-ng") == NULL)
continue;
pid = (pid_t)atoi(namelist[i]->d_name);
ppid = 0;
p_name = "?";
(void)shim_strscpy(state, "?", sizeof(state));
(void)snprintf(path, sizeof(path), "/proc/%s", namelist[i]->d_name);
if (shim_stat(path, &statbuf) == 0) {
#if defined(BUILD_STATIC)
(void)snprintf(name, sizeof(name), "%u", (unsigned int)statbuf.st_uid);
p_name = name;
#else
struct passwd *pwd;
pwd = getpwuid(statbuf.st_uid);
if (pwd && pwd->pw_name) {
p_name = pwd->pw_name;
} else {
(void)snprintf(name, sizeof(name), "%u", (unsigned int)statbuf.st_uid);
p_name = name;
}
#endif
}
(void)snprintf(path, sizeof(path), "/proc/%s/status", namelist[i]->d_name);
ret = stress_system_read(path, buf, sizeof(buf));
if (ret > 0) {
const char *ptr;
ptr = strstr(buf, "\nPPid:");
if (ptr) {
if (sscanf(ptr, "\nPPid:%d", &ppid) != 1)
ppid = 0;
}
(void)shim_strscpy(state, "?", sizeof(state));
ptr = strstr(buf, "\nState:");
if (ptr) {
if (sscanf(ptr, "\nState:%1s", state) != 1)
(void)shim_strscpy(state, "?", sizeof(state));
}
}
pr_inf("proc: %-8.8s %*d %*d %c %s\n", p_name, pid_width, pid, pid_width, ppid, state[0], cmd);
}
stress_dirent_list_free(namelist, n);
}
#else
void stress_dump_processes(void)
{
}
#endif
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