+/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
+ * vim:expandtab:shiftwidth=8:tabstop=8:
+ */
+
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
+#include <time.h>
#include <errno.h>
#include <string.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdlib.h>
+void usage(char *prog)
+{
+ printf("usage: %s {-o|-m|-l<tgt>} filenamefmt count\n", prog);
+ printf(" %s {-o|-m|-l<tgt>} filenamefmt -seconds\n", prog);
+ printf(" %s {-o|-m|-l<tgt>} filenamefmt start count\n", prog);
+}
+
int main(int argc, char ** argv)
{
- int i, rc, count;
+ int i, rc = 0, do_open = 0, do_link = 0;
+ char format[4096], *fmt, *tgt = NULL;
char filename[4096];
+ long start, last, end;
+ long begin = 0, count;
- if (argc < 3) {
- printf("Usage %s filenamebase count\n", argv[0]);
+ if (argc < 4 || argc > 5) {
+ usage(argv[0]);
return 1;
}
- if (strlen(argv[1]) > 4080) {
+ if (strcmp(argv[1], "-o") == 0) {
+ do_open = 1;
+ } else if (strncmp(argv[1], "-l", 2) == 0 && argv[1][2]) {
+ tgt = argv[1] + 2;
+ do_link = 1;
+ } else if (strcmp(argv[1], "-m") != 0) {
+ usage(argv[0]);
+ return 1;
+ }
+
+ if (strlen(argv[2]) > 4080) {
printf("name too long\n");
return 1;
}
- count = strtoul(argv[2], NULL, 0);
+ start = last = time(0);
-
- for (i=0 ; i < count ; i++) {
- sprintf(filename, "%s-%d", argv[1], i);
- rc = mknod(filename, S_IFREG| 0444, 0);
- if (rc) {
- printf("mknod(%s) error: %s\n",
- filename, strerror(errno));
- break;
+ if (argc == 4) {
+ end = strtol(argv[3], NULL, 0);
+ } else {
+ begin = strtol(argv[3], NULL, 0);
+ end = strtol(argv[4], NULL, 0);
+ }
+
+ if (end > 0) {
+ count = end;
+ end = -1UL >> 1;
+ } else {
+ end = start - end;
+ count = -1UL >> 1;
+ }
+
+ if (strchr(argv[2], '%'))
+ fmt = argv[2];
+ else {
+ sprintf(format, "%s%%d", argv[2]);
+ fmt = format;
+ }
+ for (i = 0; i < count && time(0) < end; i++, begin++) {
+ sprintf(filename, fmt, begin);
+ if (do_open) {
+ int fd = open(filename, O_CREAT | O_RDWR, 0644);
+ if (fd < 0) {
+ printf("open(%s) error: %s\n", filename,
+ strerror(errno));
+ rc = errno;
+ break;
+ }
+ close(fd);
+ } else if (do_link) {
+ rc = link(tgt, filename);
+ if (rc) {
+ printf("link(%s, %s) error: %s\n",
+ tgt, filename, strerror(errno));
+ rc = errno;
+ break;
+ }
+ } else {
+ rc = mknod(filename, S_IFREG | 0444, 0);
+ if (rc) {
+ printf("mknod(%s) error: %s\n",
+ filename, strerror(errno));
+ rc = errno;
+ break;
+ }
+ }
+ if ((i % 10000) == 0) {
+ printf(" - created %d (time %ld total %ld last %ld)\n",
+ i, time(0), time(0) - start, time(0) - last);
+ last = time(0);
}
}
+ printf("total: %d creates in %ld seconds: %f creates/second\n", i,
+ time(0) - start, ((float)i / (time(0) - start)));
+
return rc;
-}
+}