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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2005 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#include <stdio.h>
#include <ctype.h>
#include <unistd.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdlib.h>
#include <string.h>
#include <libintl.h>
#include <errno.h>
#include <sys/stdtypes.h>
#include <sys/sysmacros.h>
#define BLOCKSIZE 512 /* bytes */
#define KILOBYTE 1024
#define MEGABYTE (KILOBYTE * KILOBYTE)
#define GIGABYTE (KILOBYTE * MEGABYTE)
#define FILE_MODE (S_ISVTX + S_IRUSR + S_IWUSR)
static void usage(void) __attribute__((noreturn));
int
main(int argc, char **argv)
{
char *opts;
off_t size;
size_t len;
size_t mult = 1;
char *buf = NULL;
size_t bufsz = 0;
int errors = 0;
int i;
int verbose = 0; /* option variable */
int nobytes = 0; /* option variable */
int saverr;
if (argc == 1)
usage();
while (argv[1] && argv[1][0] == '-') {
opts = &argv[1][0];
while (*(++opts)) {
switch (*opts) {
case 'v':
verbose++;
break;
case 'n':
nobytes++;
break;
default:
usage();
}
}
argc--;
argv++;
}
if (argc < 3)
usage();
len = strlen(argv[1]);
if (len && isalpha(argv[1][len-1])) {
switch (argv[1][len-1]) {
case 'k':
case 'K':
mult = KILOBYTE;
break;
case 'b':
case 'B':
mult = BLOCKSIZE;
break;
case 'm':
case 'M':
mult = MEGABYTE;
break;
case 'g':
case 'G':
mult = GIGABYTE;
break;
default:
(void) fprintf(stderr,
gettext("unknown size %s\n"), argv[1]);
usage();
}
for (i = 0; i <= (len-2); i++) {
if (!isdigit(argv[1][i])) {
(void) fprintf(stderr,
gettext("unknown size %s\n"), argv[1]);
usage();
}
}
argv[1][len-1] = '\0';
}
size = ((off_t)atoll(argv[1]) * (off_t)mult);
argv++;
argc--;
while (argc > 1) {
int fd;
if (verbose)
(void) fprintf(stdout, gettext("%s %lld bytes\n"),
argv[1], (offset_t)size);
fd = open(argv[1], O_CREAT|O_TRUNC|O_RDWR, FILE_MODE);
if (fd < 0) {
saverr = errno;
(void) fprintf(stderr,
gettext("Could not open %s: %s\n"),
argv[1], strerror(saverr));
errors++;
argv++;
argc--;
continue;
} else if (fchown(fd, getuid(), getgid()) < 0) {
saverr = errno;
(void) fprintf(stderr, gettext(
"Could not set owner/group of %s: %s\n"),
argv[1], strerror(saverr));
(void) close(fd);
errors++;
argv++;
argc--;
continue;
} else if (lseek(fd, (off_t)size-1, SEEK_SET) < 0) {
saverr = errno;
(void) fprintf(stderr, gettext(
"Could not seek to offset %ld in %s: %s\n"),
(unsigned long)size-1, argv[1], strerror(saverr));
(void) close(fd);
errors++;
argv++;
argc--;
continue;
} else if (write(fd, "", 1) != 1) {
saverr = errno;
(void) fprintf(stderr, gettext(
"Could not set length of %s: %s\n"),
argv[1], strerror(saverr));
(void) close(fd);
errors++;
argv++;
argc--;
continue;
}
if (!nobytes) {
off_t written = 0;
struct stat64 st;
if (lseek(fd, (off_t)0, SEEK_SET) < 0) {
saverr = errno;
(void) fprintf(stderr, gettext(
"Could not seek to beginning of %s: %s\n"),
argv[1], strerror(saverr));
(void) close(fd);
errors++;
argv++;
argc--;
continue;
}
if (fstat64(fd, &st) < 0) {
saverr = errno;
(void) fprintf(stderr, gettext(
"Could not fstat64 %s: %s\n"),
argv[1], strerror(saverr));
(void) close(fd);
errors++;
argv++;
argc--;
continue;
}
if (bufsz != st.st_blksize) {
if (buf)
free(buf);
bufsz = (size_t)st.st_blksize;
buf = calloc(1, bufsz);
if (buf == NULL) {
(void) fprintf(stderr, gettext(
"Could not allocate buffer of"
" size %d\n"), (int)bufsz);
(void) close(fd);
bufsz = 0;
errors++;
argv++;
argc--;
continue;
}
}
while (written < size) {
ssize_t result;
size_t bytes = (size_t)MIN(bufsz, size-written);
if ((result = write(fd, buf, bytes)) !=
(ssize_t)bytes) {
saverr = errno;
if (result < 0)
result = 0;
written += result;
(void) fprintf(stderr, gettext(
"%s: initialized %lu of %lu bytes: %s\n"),
argv[1], (unsigned long)written,
(unsigned long)size,
strerror(saverr));
errors++;
break;
}
written += bytes;
}
/*
* A write(2) call in the above loop failed so
* close out this file and go on (error was
* already incremented when the write(2) failed).
*/
if (written < size) {
(void) close(fd);
argv++;
argc--;
continue;
}
}
if (close(fd) < 0) {
saverr = errno;
(void) fprintf(stderr, gettext(
"Error encountered when closing %s: %s\n"),
argv[1], strerror(saverr));
errors++;
argv++;
argc--;
continue;
}
/*
* Only set the modes (including the sticky bit) if we
* had no problems. It is not an error for the chmod(2)
* to fail, but do issue a warning.
*/
if (chmod(argv[1], FILE_MODE) < 0)
(void) fprintf(stderr, gettext(
"warning: couldn't set mode to %#o\n"), FILE_MODE);
argv++;
argc--;
}
return (errors);
}
static void usage()
{
(void) fprintf(stderr, gettext(
"Usage: mkfile [-nv] <size>[g|k|b|m] <name1> [<name2>] ...\n"));
exit(1);
}
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