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/*
* Copyright (C) 2012-2014 Cyril Hrubis chrubis@suse.cz
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* 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.
*
* Further, this software is distributed without any warranty that it is
* free of the rightful claim of any third person regarding infringement
* or the like. Any license provided herein, whether implied or
* otherwise, applies only to this software file. Patent licenses, if
* any, provided herein do not apply to combinations of this program with
* other software, or any other product whatsoever.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include "test.h"
#include "tst_process_state.h"
int tst_process_state_wait(const char *file, const int lineno,
void (*cleanup_fn)(void), pid_t pid,
const char state, unsigned int msec_timeout)
{
char proc_path[128], cur_state;
unsigned int msecs = 0;
snprintf(proc_path, sizeof(proc_path), "/proc/%i/stat", pid);
for (;;) {
safe_file_scanf(file, lineno, cleanup_fn, proc_path,
"%*i %*s %c", &cur_state);
if (state == cur_state)
break;
usleep(1000);
msecs += 1;
if (msec_timeout && msecs >= msec_timeout) {
errno = ETIMEDOUT;
return -1;
}
}
return 0;
}
int tst_process_state_wait2(pid_t pid, const char state)
{
char proc_path[128], cur_state;
snprintf(proc_path, sizeof(proc_path), "/proc/%i/stat", pid);
for (;;) {
FILE *f = fopen(proc_path, "r");
if (!f) {
fprintf(stderr, "Failed to open '%s': %s\n",
proc_path, strerror(errno));
return 1;
}
if (fscanf(f, "%*i %*s %c", &cur_state) != 1) {
fclose(f);
fprintf(stderr, "Failed to read '%s': %s\n",
proc_path, strerror(errno));
return 1;
}
fclose(f);
if (state == cur_state)
return 0;
usleep(10000);
}
}
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