/**
* Scan a pid's file descriptors, looking for our
* target socket.
*/
static void process_pid(char *buffer, size_t s, unsigned long pid,
unsigned long inode)
{
DIR *dir;
struct dirent *de;
size_t len;
char pathbuf[25], linkbuf[25], target[25];
/* Root through the process's fds */
snprintf(target, sizeof(target), "socket:[%lu]", inode);
snprintf(pathbuf, sizeof(pathbuf), "/proc/%lu/fds", pid);
if (!(dir = opendir(pathbuf)))
return;
while (!*buffer && (de = readdir(dir))) {
snprintf(pathbuf, sizeof(pathbuf),
"/proc/%lu/fds/%s", pid, de->d_name);
len = readlink(pathbuf, linkbuf, sizeof(linkbuf));
if (len <= 0 || len > sizeof(linkbuf))
return;
linkbuf[len] = '\0';
if (!strcmp(linkbuf, target))
get_procname(buffer, s, pid);
}
closedir(dir);
}
static int check_procname(FILE *f_cmd, FILE *f_stat, const char *procname)
{
char *tmp = NULL, *p;
size_t l;
int ret = SUCCEED;
if ('\0' == *procname)
return SUCCEED;
if (SUCCEED == get_procname(f_stat, &tmp))
{
if (0 == strcmp(tmp, procname))
goto clean;
}
else if (SUCCEED == get_cmdline(f_cmd, &tmp, &l))
{
if (NULL == (p = strrchr(tmp, '/')))
p = tmp;
else
p++;
if (0 == strcmp(p, procname))
goto clean;
}
ret = FAIL;
clean:
zbx_free(tmp);
return ret;
}
// Print statistics of a single socket - used in case view mode is e_netstat_like
void print_netstat_like(socket_stats_t* p_si_stats, mc_grp_info_t* , FILE* file, int pid)
{
static const int MAX_ADDR_LEN = strlen("123.123.123.123:12345"); // for max len of ip address and port together
char process[PATH_MAX + 1];
if(! p_si_stats->inode) return; // shmem is not updated yet
fprintf(file, "%-5s %-9s ", to_str_socket_type_netstat_like(p_si_stats->socket_type), p_si_stats->b_is_offloaded ? "Yes" : "No");
fprintf(file, "%-6d %-6d ", (int)p_si_stats->n_rx_ready_byte_count, (int)p_si_stats->n_tx_ready_byte_count);
//
// Bounded + Connected information
//
int len = 0;
if (p_si_stats->bound_if || p_si_stats->bound_port) {
/* cppcheck-suppress wrongPrintfScanfArgNum */
len = fprintf(file, "%d.%d.%d.%d:%-5d", NIPQUAD(p_si_stats->bound_if), ntohs(p_si_stats->bound_port));
if (len < 0) len = 0; // error
}
if (len < MAX_ADDR_LEN )fprintf(file, "%*s ", MAX_ADDR_LEN-len, ""); // pad and delimiter
fprintf(file, " ");
if (p_si_stats->connected_ip || p_si_stats->connected_port) {
/* cppcheck-suppress wrongPrintfScanfArgNum */
len = fprintf(file, "%d.%d.%d.%d:%-5d", NIPQUAD(p_si_stats->connected_ip), ntohs(p_si_stats->connected_port));
}
else {
len = fprintf(file, "0.0.0.0:*");
}
if (len < 0) len = 0; // error
if (len < MAX_ADDR_LEN )fprintf(file, "%*s ", MAX_ADDR_LEN-len, ""); // pad and delimiter
const char * tcp_state = "";
if (p_si_stats->socket_type == SOCK_STREAM) {
tcp_state = tcp_state_str[((enum tcp_state)p_si_stats->tcp_state)];
}
fprintf(file, "%-11s %-10lu %d/%s\n",
tcp_state, (u_long)p_si_stats->inode, pid,
(get_procname(pid, process, sizeof(process)) == 0 ? process : "-")); // max tcp state len is 11 characters = ESTABLISHED
}
Process *get_process(pid_t pid) {
/* TODO: Add test for invalid pid. Right now, we get a lot of errors and some
* structure.*/
Process *retval = (Process *)calloc(1, sizeof(Process));
unsigned int *uids = NULL;
unsigned int *gids = NULL;
retval->pid = pid;
retval->ppid = get_ppid(pid);
retval->name = get_procname(pid);
retval->exe = get_exe(pid);
retval->cmdline = get_cmdline(pid);
retval->create_time = get_create_time(pid);
uids = get_ids(pid, "Uid:");
if (uids) {
retval->uid = uids[0];
retval->euid = uids[1];
retval->suid = uids[2];
retval->username =
get_username(retval->uid); /* Uses real uid and not euid */
} else {
retval->uid = retval->euid = retval->suid = 0;
retval->username = NULL;
}
gids = get_ids(pid, "Gid:");
if (uids) {
retval->gid = gids[0];
retval->egid = gids[1];
retval->sgid = gids[2];
} else {
retval->uid = retval->euid = retval->suid = 0;
}
retval->terminal = get_terminal(pid);
free(uids);
free(gids);
return retval;
}
Process *
get_process(unsigned pid)
{
Process *retval = calloc(1, sizeof(Process));
unsigned int *uids = NULL;
unsigned int *gids = NULL;
retval->pid = pid;
retval->ppid = get_ppid(pid);
retval->name = get_procname(pid);
retval->exe = get_exe(pid);
retval->cmdline = get_cmdline(pid);
retval->create_time = get_create_time(pid);
uids = get_ids(pid, "Uid:");
if (uids) {
retval->uid = uids[0];
retval->euid = uids[1];
retval->suid = uids[2];
retval->username = get_username(retval->uid); /* Uses real uid and not euid */
} else {
retval->uid = retval->euid = retval->suid = 0;
retval->username = NULL;
}
gids = get_ids(pid, "Gid:");
if (uids) {
retval->gid = gids[0];
retval->egid = gids[1];
retval->sgid = gids[2];
} else {
retval->uid = retval->euid = retval->suid = 0;
}
retval->terminal = get_terminal(pid);
if (uids) free(uids);
if (gids) free(gids);
return retval;
}