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reds_stat: Show single spice file if only one is present

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Simple usage improvement.
If only one process using spice is present allow to call
reds_stat not passing any pid.

Signed-off-by: Frediano Ziglio <fziglio@redhat.com>
Acked-by: Christophe de Dinechin <cdupontd@redhat.com>
This commit is contained in:
Frediano Ziglio 2017-09-13 09:52:00 +01:00
parent 6ab80b19fa
commit 2c1037f47c
1 changed files with 29 additions and 3 deletions
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32
tools/reds_stat.c
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@ -25,6 +25,7 @@
#include <string.h>
#include <unistd.h>
#include <inttypes.h>
#include <glob.h>
#include <sys/stat.h>
#include <spice/stats.h>
#include <common/verify.h>
@ -60,10 +61,29 @@ static void print_stat_tree(int32_t node_index, int depth)
}
}
// look for a single file /dev/shm/spice.XXX and extract XXX pid
static pid_t search_pid(void)
{
pid_t pid = 0;
glob_t globbuf;
if (glob("/dev/shm/spice.*", 0, NULL, &globbuf)) {
return pid;
}
if (globbuf.gl_pathc == 1) {
const char *p = strchr(globbuf.gl_pathv[0], '.');
if (p) {
pid = atoi(p+1);
}
}
globfree(&globbuf);
return pid;
}
int main(int argc, char **argv)
{
char *shm_name;
pid_t kvm_pid;
pid_t kvm_pid = 0;
uint32_t num_of_nodes = 0;
size_t shm_size;
size_t shm_old_size;
@ -74,11 +94,17 @@ int main(int argc, char **argv)
unsigned header_size = sizeof(SpiceStat);
SpiceStat *reds_stat = (SpiceStat *)MAP_FAILED;
if (argc != 2 || !(kvm_pid = atoi(argv[1]))) {
if (argc == 2) {
kvm_pid = atoi(argv[1]);
} else if (argc == 1) {
kvm_pid = search_pid();
}
if (argc > 2 || !kvm_pid) {
printf("usage: reds_stat [qemu_pid] (e.g. `pgrep qemu`)\n");
return -1;
}
shm_name_len = strlen(SPICE_STAT_SHM_NAME) + strlen(argv[1]);
shm_name_len = strlen(SPICE_STAT_SHM_NAME) + 64;
if (!(shm_name = (char *)malloc(shm_name_len))) {
perror("malloc");
return -1;