libvirt/tests/testutils.c

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/*
* testutils.c: basic test utils
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*
* Copyright (C) 2005-2007 Red Hat, Inc.
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*
* See COPYING.LIB for the License of this software
*
* Karel Zak <kzak@redhat.com>
*
* $Id$
*/
#include "config.h"
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#include <stdio.h>
#include <stdlib.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <unistd.h>
#include <fcntl.h>
#include <limits.h>
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#include "testutils.h"
#ifdef HAVE_PATHS_H
#include <paths.h>
#endif
#ifndef _PATH_DEVNULL
#define _PATH_DEVNULL "/dev/null"
#endif
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#define GETTIMEOFDAY(T) gettimeofday(T, NULL)
#define DIFF_MSEC(T, U) \
((((int) ((T)->tv_sec - (U)->tv_sec)) * 1000000.0 + \
((int) ((T)->tv_usec - (U)->tv_usec))) / 1000.0)
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double
virtTestCountAverage(double *items, int nitems)
{
long double sum = 0;
int i;
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for (i=1; i < nitems; i++)
sum += items[i];
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return (double) (sum / nitems);
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}
/*
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* Runs test and count average time (if the nloops is grater than 1)
*
* returns: -1 = error, 0 = success
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*/
int
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virtTestRun(const char *title, int nloops, int (*body)(const void *data), const void *data)
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{
int i, ret = 0;
double *ts = NULL;
if (nloops > 1 && (ts = calloc(nloops,
sizeof(double)))==NULL)
return -1;
for (i=0; i < nloops; i++) {
struct timeval before, after;
if (ts)
GETTIMEOFDAY(&before);
if ((ret = body(data)) != 0)
break;
if (ts) {
GETTIMEOFDAY(&after);
ts[i] = DIFF_MSEC(&after, &before);
}
}
if (ret == 0 && ts)
fprintf(stderr, "%-50s ... OK [%.5f ms]\n", title,
virtTestCountAverage(ts, nloops));
else if (ret == 0)
fprintf(stderr, "%-50s ... OK\n", title);
else
fprintf(stderr, "%-50s ... FAILED\n", title);
if (ts)
free(ts);
return ret;
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}
int virtTestLoadFile(const char *name,
char **buf,
int buflen) {
FILE *fp = fopen(name, "r");
struct stat st;
if (!fp)
return -1;
if (fstat(fileno(fp), &st) < 0) {
fclose(fp);
return -1;
}
if (st.st_size > (buflen-1)) {
fclose(fp);
return -1;
}
if (st.st_size) {
if (fread(*buf, st.st_size, 1, fp) != 1) {
fclose(fp);
return -1;
}
}
(*buf)[st.st_size] = '\0';
fclose(fp);
return st.st_size;
}
static
void virtTestCaptureProgramExecChild(const char *const argv[],
int pipefd) {
int i;
int open_max;
int stdinfd = -1;
int stderrfd = -1;
const char *const env[] = {
"LANG=C",
NULL
};
if ((stdinfd = open(_PATH_DEVNULL, O_RDONLY)) < 0)
goto cleanup;
if ((stderrfd = open(_PATH_DEVNULL, O_WRONLY)) < 0)
goto cleanup;
open_max = sysconf (_SC_OPEN_MAX);
for (i = 0; i < open_max; i++) {
if (i != stdinfd &&
i != stderrfd &&
i != pipefd)
close(i);
}
if (dup2(stdinfd, STDIN_FILENO) != STDIN_FILENO)
goto cleanup;
if (dup2(pipefd, STDOUT_FILENO) != STDOUT_FILENO)
goto cleanup;
if (dup2(stderrfd, STDERR_FILENO) != STDERR_FILENO)
goto cleanup;
/* SUS is crazy here, hence the cast */
execve(argv[0], (char *const*)argv, (char *const*)env);
cleanup:
if (stdinfd != -1)
close(stdinfd);
if (stderrfd != -1)
close(stderrfd);
}
int virtTestCaptureProgramOutput(const char *const argv[],
char **buf,
int buflen) {
int pipefd[2];
if (pipe(pipefd) < 0)
return -1;
int pid = fork();
switch (pid) {
case 0:
close(pipefd[0]);
virtTestCaptureProgramExecChild(argv, pipefd[1]);
close(pipefd[1]);
_exit(1);
case -1:
return -1;
default:
{
int got = 0;
int ret = -1;
int want = buflen-1;
close(pipefd[1]);
while (want) {
if ((ret = read(pipefd[0], (*buf)+got, want)) <= 0)
break;
got += ret;
want -= ret;
}
close(pipefd[0]);
if (!ret)
(*buf)[got] = '\0';
waitpid(pid, NULL, 0);
return ret;
}
}
}
/*
* Local variables:
* indent-tabs-mode: nil
* c-indent-level: 4
* c-basic-offset: 4
* tab-width: 4
* End:
*/