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tests: cmd: don't recurse
This confers an >10x speedup on t/z-t/cmd builds (12s -> 1.1s), gets rid of 23 redundant identical automake specs and gitignores, and groups the binaries with their common headers Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Reviewed-by: John Kennedy <john.kennedy@delphix.com> Reviewed-by: Ryan Moeller <ryan@iXsystems.com> Signed-off-by: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz> Closes #13259
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/*
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* This file and its contents are supplied under the terms of the
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* Common Development and Distribution License ("CDDL"), version 1.0.
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* You may only use this file in accordance with the terms of version
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* 1.0 of the CDDL.
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*
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* A full copy of the text of the CDDL should have accompanied this
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* source. A copy of the CDDL is also available via the Internet at
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* http://www.illumos.org/license/CDDL.
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*/
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/*
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* Copyright (c) 2018 by Delphix. All rights reserved.
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*/
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#include <sys/types.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <string.h>
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static int bsize = 0;
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static int count = 0;
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static char *ifile = NULL;
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static char *ofile = NULL;
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static int stride = 0;
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static int seek = 0;
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static char *execname = "stride_dd";
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static void usage(void);
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static void parse_options(int argc, char *argv[]);
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static void
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usage(void)
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{
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(void) fprintf(stderr,
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"usage: %s -i inputfile -o outputfile -b blocksize -c count \n"
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" -s stride [ -k seekblocks]\n"
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"\n"
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"Simplified version of dd that supports the stride option.\n"
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"A stride of n means that for each block written, n - 1 blocks\n"
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"are skipped in both the input and output file. A stride of 1\n"
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"means that blocks are read and written consecutively.\n"
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"All numeric parameters must be integers.\n"
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"\n"
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" inputfile: File to read from\n"
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" outputfile: File to write to\n"
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" blocksize: Size of each block to read/write\n"
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" count: Number of blocks to read/write\n"
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" stride: Read/write a block then skip (stride - 1) blocks\n"
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" seekblocks: Number of blocks to skip at start of output\n",
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execname);
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(void) exit(1);
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}
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static void
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parse_options(int argc, char *argv[])
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{
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int c;
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int errflag = 0;
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execname = argv[0];
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extern char *optarg;
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extern int optind, optopt;
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while ((c = getopt(argc, argv, ":b:c:i:o:s:k:")) != -1) {
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switch (c) {
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case 'b':
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bsize = atoi(optarg);
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break;
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case 'c':
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count = atoi(optarg);
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break;
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case 'i':
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ifile = optarg;
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break;
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case 'o':
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ofile = optarg;
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break;
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case 's':
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stride = atoi(optarg);
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break;
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case 'k':
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seek = atoi(optarg);
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break;
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case ':':
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(void) fprintf(stderr,
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"Option -%c requires an operand\n", optopt);
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errflag++;
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break;
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case '?':
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default:
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(void) fprintf(stderr,
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"Unrecognized option: -%c\n", optopt);
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errflag++;
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break;
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}
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if (errflag) {
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(void) usage();
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}
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}
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if (bsize <= 0 || count <= 0 || stride <= 0 || ifile == NULL ||
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ofile == NULL || seek < 0) {
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(void) fprintf(stderr,
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"Required parameter(s) missing or invalid.\n");
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(void) usage();
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}
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}
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int
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main(int argc, char *argv[])
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{
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int i;
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int ifd;
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int ofd;
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void *buf;
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int c;
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parse_options(argc, argv);
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ifd = open(ifile, O_RDONLY);
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if (ifd == -1) {
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(void) fprintf(stderr, "%s: %s: ", execname, ifile);
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perror("open");
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exit(2);
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}
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ofd = open(ofile, O_WRONLY | O_CREAT, 0666);
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if (ofd == -1) {
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(void) fprintf(stderr, "%s: %s: ", execname, ofile);
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perror("open");
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exit(2);
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}
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/*
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* We use valloc because some character block devices expect a
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* page-aligned buffer.
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*/
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int err = posix_memalign(&buf, 4096, bsize);
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if (err != 0) {
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(void) fprintf(stderr,
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"%s: %s\n", execname, strerror(err));
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exit(2);
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}
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if (seek > 0) {
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if (lseek(ofd, seek * bsize, SEEK_CUR) == -1) {
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perror("output lseek");
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exit(2);
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}
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}
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for (i = 0; i < count; i++) {
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c = read(ifd, buf, bsize);
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if (c != bsize) {
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perror("read");
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exit(2);
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}
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if (c != bsize) {
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if (c < 0) {
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perror("read");
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} else {
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(void) fprintf(stderr,
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"%s: unexpected short read, read %d "
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"bytes, expected %d\n", execname,
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c, bsize);
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}
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exit(2);
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}
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c = write(ofd, buf, bsize);
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if (c != bsize) {
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if (c < 0) {
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perror("write");
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} else {
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(void) fprintf(stderr,
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"%s: unexpected short write, wrote %d "
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"bytes, expected %d\n", execname,
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c, bsize);
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}
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exit(2);
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}
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if (stride > 1) {
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if (lseek(ifd, (stride - 1) * bsize, SEEK_CUR) == -1) {
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perror("input lseek");
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exit(2);
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}
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if (lseek(ofd, (stride - 1) * bsize, SEEK_CUR) == -1) {
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perror("output lseek");
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exit(2);
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}
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}
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}
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free(buf);
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(void) close(ofd);
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(void) close(ifd);
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return (0);
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}
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