1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22 /*
23 * Copyright 2007 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 /*
28 * Copyright 2022 MNX Cloud, Inc.
29 */
30
31 #include "../file_common.h"
32 #include <libgen.h>
33
34 static unsigned char bigbuffer[BIGBUFFERSIZE];
35
36 /*
37 * Writes (or appends) a given value to a file repeatedly.
38 * See header file for defaults.
39 */
40
41 static void usage(void);
42
43 int
44 main(int argc, char **argv)
45 {
46 int bigfd;
47 int c;
48 int oflag = 0;
49 int err = 0;
50 int k;
51 long i;
52 int64_t good_writes = 0;
53 uchar_t nxtfillchar;
54 /*
55 * Default Parameters
56 */
57 int write_count = BIGFILESIZE;
58 uchar_t fillchar = DATA;
59 int block_size = BLOCKSZ;
60 char *filename = NULL;
61 char *operation = NULL;
62 offset_t noffset, offset = 0;
63 int verbose = 0;
64 int rsync = 0;
65 int wsync = 0;
66 int exitcode;
67
68 /*
69 * Process Arguments
70 */
71 while ((c = getopt(argc, argv, "b:c:d:s:f:o:vwr")) != -1) {
72 switch (c) {
73 case 'b':
74 block_size = atoi(optarg);
75 break;
76 case 'c':
77 write_count = atoi(optarg);
78 break;
79 case 'd':
80 fillchar = atoi(optarg);
81 break;
82 case 's':
83 offset = atoll(optarg);
84 break;
85 case 'f':
86 filename = optarg;
87 break;
88 case 'o':
89 operation = optarg;
90 break;
91 case 'v':
92 verbose = 1;
93 break;
94 case 'w':
95 wsync = 1;
96 break;
97 case 'r':
98 rsync = 1;
99 break;
100 case '?':
101 (void) printf("unknown arg %c\n", optopt);
102 usage();
103 break;
104 }
105 }
106
107 /*
108 * Validate Parameters
109 */
110 if (!filename) {
111 (void) printf("Filename not specified (-f <file>)\n");
112 err++;
113 }
114
115 if (!operation) {
116 (void) printf("Operation not specified (-o <operation>).\n");
117 err++;
118 }
119
120 if (block_size > BIGBUFFERSIZE) {
121 (void) printf("block_size is too large max==%d.\n",
122 BIGBUFFERSIZE);
123 err++;
124 }
125
126 if (err) usage();
127
128 /*
129 * Prepare the buffer and determine the requested operation
130 */
131 nxtfillchar = fillchar;
132 k = 0;
133
134 for (i = 0; i < block_size; i++) {
135 bigbuffer[i] = nxtfillchar;
136
137 if (fillchar == 0) {
138 if ((k % DATA_RANGE) == 0) {
139 k = 0;
140 }
141 nxtfillchar = k++;
142 }
143 }
144
145 /*
146 * using the strncmp of operation will make the operation match the
147 * first shortest match - as the operations are unique from the first
148 * character this means that we match single character operations
149 */
150 if ((strncmp(operation, "create", strlen(operation) + 1)) == 0 ||
151 (strncmp(operation, "overwrite", strlen(operation) + 1)) == 0) {
152 oflag = (O_RDWR|O_CREAT);
153 } else if ((strncmp(operation, "append", strlen(operation) + 1)) == 0) {
154 oflag = (O_RDWR|O_APPEND);
155 } else {
156 (void) printf("valid operations are <create|append> not '%s'\n",
157 operation);
158 usage();
159 }
160
161 if (rsync) {
162 oflag = oflag | O_RSYNC;
163 }
164
165 if (wsync) {
166 oflag = oflag | O_SYNC;
167 }
168
169 /*
170 * Given an operation (create/overwrite/append), open the file
171 * accordingly and perform a write of the appropriate type.
172 */
173 if ((bigfd = open(filename, oflag, 0666)) == -1) {
174 exitcode = errno;
175 (void) printf("open %s: failed [%s]%d. Aborting!\n", filename,
176 strerror(errno), errno);
177 exit(exitcode);
178 }
179 noffset = llseek(bigfd, offset, SEEK_SET);
180 if (noffset != offset) {
181 exitcode = errno;
182 (void) printf("llseek %s (%lld/%lld) failed [%s]%d.Aborting!\n",
183 filename, offset, noffset, strerror(errno), errno);
184 exit(exitcode);
185 }
186
187 if (verbose) {
188 (void) printf("%s: block_size = %d, write_count = %d, "
189 "offset = %lld, data = %s%d\n", filename, block_size,
190 write_count, offset,
191 (fillchar == 0) ? "0->" : "",
192 (fillchar == 0) ? DATA_RANGE : fillchar);
193 }
194
195 for (i = 0; i < write_count; i++) {
196 ssize_t n;
197
198 if ((n = write(bigfd, &bigbuffer, block_size)) == -1) {
199 exitcode = errno;
200 (void) printf("write failed (%ld), good_writes = %lld, "
201 "error: %s[%d]\n", (long)n, good_writes,
202 strerror(errno),
203 errno);
204 exit(exitcode);
205 }
206 good_writes++;
207 }
208
209 if (verbose) {
210 (void) printf("Success: good_writes = %lld (%lld)\n",
211 good_writes, (good_writes * block_size));
212 }
213
214 return (0);
215 }
216
217 static void
218 usage(void)
219 {
220 char *base = (char *)"file_write";
221 char *exec = (char *)getexecname();
222
223 if (exec != NULL)
224 exec = strdup(exec);
225 if (exec != NULL)
226 base = basename(exec);
227
228 (void) printf("Usage: %s [-v] -o {create,overwrite,append} -f file_name"
229 " [-b block_size]\n"
230 "\t[-s offset] [-c write_count] [-d data]\n"
231 "\twhere [data] equal to zero causes chars "
232 "0->%d to be repeated throughout\n", base, DATA_RANGE);
233
234 if (exec) {
235 free(exec);
236 }
237
238 exit(1);
239 }