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Make syscall_timing(1) default to a temporary file when run without -p.

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Obtained from:	CheriBSD
MFC after:	2 weeks
Sponsored by:	DARPA, AFRL
This commit is contained in:
Edward Tomasz Napierala 2017-11-02 12:11:20 +00:00
parent a250df51f7
commit 3d21466535
1 changed files with 36 additions and 2 deletions
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38
tools/tools/syscall_timing/syscall_timing.c
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@ -38,6 +38,7 @@
#include <assert.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <inttypes.h>
#include <limits.h>
@ -693,15 +694,17 @@ main(int argc, char *argv[])
struct timespec ts_res;
const struct test *the_test;
const char *path;
char *tmp_dir, *tmp_path;
long long ll;
char *endp;
int ch, error, i, j, k;
int ch, fd, error, i, j, k, rv;
uintmax_t iterations, loops;
alarm_timeout = 1;
iterations = 0;
loops = 10;
path = NULL;
tmp_path = NULL;
while ((ch = getopt(argc, argv, "i:l:p:s:")) != -1) {
switch (ch) {
case 'i':
@ -760,7 +763,15 @@ main(int argc, char *argv[])
if (the_test == NULL)
usage();
if ((the_test->t_flags & FLAG_PATH) && (path == NULL)) {
errx(-1, "%s requires -p", the_test->t_name);
tmp_dir = strdup("/tmp/syscall_timing.XXXXXXXX");
if (tmp_dir == NULL)
err(1, "strdup");
tmp_dir = mkdtemp(tmp_dir);
if (tmp_dir == NULL)
err(1, "mkdtemp");
rv = asprintf(&tmp_path, "%s/testfile", tmp_dir);
if (rv <= 0)
err(1, "asprintf");
}
}
@ -779,6 +790,19 @@ main(int argc, char *argv[])
the_test = &tests[i];
}
if (tmp_path != NULL) {
fd = open(tmp_path, O_WRONLY | O_CREAT, 0700);
if (fd < 0)
err(1, "cannot open %s", tmp_path);
error = ftruncate(fd, 1000000);
if (error != 0)
err(1, "ftruncate");
error = close(fd);
if (error != 0)
err(1, "close");
path = tmp_path;
}
/*
* Run one warmup, then do the real thing (loops) times.
*/
@ -804,5 +828,15 @@ main(int argc, char *argv[])
printf("0.%09ju\n", (uintmax_t)nsecsperit);
}
}
if (tmp_path != NULL) {
error = unlink(tmp_path);
if (error != 0 && errno != ENOENT)
warn("cannot unlink %s", tmp_path);
error = rmdir(tmp_dir);
if (error != 0)
warn("cannot rmdir %s", tmp_dir);
}
return (0);
}