xref: /illumos-gate/usr/src/cmd/cdrw/util.c (revision 4077f1ed)
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, Version 1.0 only
6  * (the "License").  You may not use this file except in compliance
7  * with the License.
8  *
9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10  * or http://www.opensolaris.org/os/licensing.
11  * See the License for the specific language governing permissions
12  * and limitations under the License.
13  *
14  * When distributing Covered Code, include this CDDL HEADER in each
15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16  * If applicable, add the following below this CDDL HEADER, with the
17  * fields enclosed by brackets "[]" replaced with your own identifying
18  * information: Portions Copyright [yyyy] [name of copyright owner]
19  *
20  * CDDL HEADER END
21  */
22 /*
23  * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
24  * Use is subject to license terms.
25  */
26 
27 #pragma ident	"%Z%%M%	%I%	%E% SMI"
28 
29 #include <stdlib.h>
30 #include <sys/types.h>
31 #include <errno.h>
32 #include <stdlib.h>
33 #include <string.h>
34 #include <unistd.h>
35 #include <libintl.h>
36 #include <time.h>
37 #include <pwd.h>
38 #include <auth_attr.h>
39 #include <auth_list.h>
40 #include <secdb.h>
41 
42 #include "transport.h"
43 #include "util.h"
44 #include "mmc.h"
45 #include "msgs.h"
46 #include "misc_scsi.h"
47 #include "main.h"
48 #include "trackio.h"
49 #include "bstream.h"
50 
51 char strbuf[81];
52 int priv_change_needed = 0;
53 
54 void *
my_zalloc(size_t size)55 my_zalloc(size_t size)
56 {
57 	void *ret;
58 
59 	ret = malloc(size);
60 	if (ret == NULL) {
61 
62 		/* Lets wait a sec. and try again */
63 		if (errno == EAGAIN) {
64 			(void) sleep(1);
65 			ret = malloc(size);
66 		}
67 
68 		if (ret == NULL) {
69 			(void) err_msg("%s\n", gettext(strerror(errno)));
70 			(void) err_msg(gettext(
71 			    "Memory allocation failure, Exiting...\n"));
72 			exit(1);
73 		}
74 	}
75 	(void) memset(ret, 0, size);
76 	return (ret);
77 }
78 
79 /*
80  * Prints a string after going back pos number of steps.
81  * Mainly used to show %age complete.
82  */
83 int
str_print(char * str,int pos)84 str_print(char *str, int pos)
85 {
86 	if ((pos > 0) && (pos < 80)) {
87 		(void) memset(strbuf, 8, pos);
88 		strbuf[pos] = 0;
89 		(void) printf(strbuf);
90 		(void) memset(strbuf, ' ', pos);
91 		strbuf[pos] = 0;
92 		(void) printf(strbuf);
93 		(void) memset(strbuf, 8, pos);
94 		strbuf[pos] = 0;
95 		(void) printf(strbuf);
96 	}
97 
98 	(void) printf("%s", str);
99 	(void) fflush(stdout);
100 	return (strlen(str));
101 }
102 
103 /*
104  * dump the trackio_error struct.
105  */
106 void
print_trackio_error(struct trackio_error * te)107 print_trackio_error(struct trackio_error *te)
108 {
109 	char *msg, *msg1;
110 
111 	msg = gettext("System could not supply data at the required rate.\n");
112 	msg1 = gettext("Try using a lower speed for write\n");
113 
114 	switch (te->err_type) {
115 	case TRACKIO_ERR_SYSTEM:
116 		err_msg(gettext("System error: %s\n"), strerror(te->te_errno));
117 		return;
118 	case TRACKIO_ERR_TRANSPORT:
119 		err_msg(gettext("Transport mechanism error:\n"));
120 		if (te->status == 2) {
121 			if ((te->key == 3) && (te->asc == 0x0c) &&
122 			    (te->ascq == 9)) {
123 				err_msg(msg);
124 				err_msg(msg1);
125 				return;
126 			}
127 			if (te->key == 3) {
128 				err_msg(gettext("Bad media.\n"));
129 				return;
130 			}
131 			if (debug) {
132 				err_msg("Sense key %x, asc/asq %x/%x\n",
133 				    te->key, te->asc, te->ascq);
134 			} else {
135 				err_msg(gettext("I/O error\n"));
136 			}
137 			return;
138 		}
139 		if (te->te_errno != 0)
140 			err_msg("%s\n", strerror(te->te_errno));
141 		return;
142 	case TRACKIO_ERR_USER_ABORT:
143 		err_msg(gettext("User abort.\n"));
144 		return;
145 	default:
146 		err_msg(gettext("Unknown error type.\n"));
147 		if (debug) {
148 			err_msg("Trackio err type %d\n", te->err_type);
149 		}
150 	}
151 }
152 
153 char *
get_err_str(void)154 get_err_str(void)
155 {
156 	if (str_errno != 0)
157 		return (str_errno_to_string(str_errno));
158 	return (strerror(errno));
159 }
160 
161 int
get_audio_type(char * ext)162 get_audio_type(char *ext)
163 {
164 	if ((strcasecmp(ext, "au") == 0) ||
165 	    (strcasecmp(ext, "sun") == 0))
166 		return (AUDIO_TYPE_SUN);
167 	if ((strcasecmp(ext, "wav") == 0) ||
168 	    (strcasecmp(ext, "riff") == 0))
169 		return (AUDIO_TYPE_WAV);
170 	if (strcasecmp(ext, "cda") == 0)
171 		return (AUDIO_TYPE_CDA);
172 	if (strcasecmp(ext, "aur") == 0)
173 		return (AUDIO_TYPE_AUR);
174 
175 	return (-1);
176 }
177 
178 /*
179  * common routines for showing progress.
180  */
181 
182 int progress_pos;
183 static uint64_t last_total;
184 time_t tm;
185 
186 void
init_progress(void)187 init_progress(void)
188 {
189 	progress_pos = 0;
190 	last_total = 0;
191 	tm = time(NULL);
192 }
193 
194 int
progress(int64_t arg,int64_t completed)195 progress(int64_t arg, int64_t completed)
196 {
197 	char s[BUFSIZE];
198 	uint64_t total = (uint64_t)arg;
199 
200 	if (completed == -1) {
201 		/* Got ^C. Add 2 to progress pos to compensate for ^ and C */
202 		progress_pos = str_print("(flushing ...)", progress_pos+2);
203 		return (0);
204 	}
205 	if (total == 0) {
206 		if (tm != time(NULL)) {
207 			tm = time(NULL);
208 			(void) snprintf(s, BUFSIZE,
209 			    gettext("%d bytes written"), completed);
210 
211 			progress_pos = str_print(s, progress_pos);
212 		}
213 	} else {
214 		total = (((uint64_t)completed) * 100)/total;
215 		if (total == last_total)
216 			return (0);
217 		last_total = total;
218 		if (total > 100) {
219 			/* There is clearly a miscalculation somewhere */
220 			if (debug)
221 				(void) printf("\nWrote more than 100 %% !!\n");
222 			return (0);
223 		}
224 		if (total == 100) {
225 			/* l10n_NOTE : 'done' as in "Writing track 1...done"  */
226 			(void) snprintf(s, BUFSIZE, gettext("done.\n"));
227 		} else {
228 			(void) snprintf(s, BUFSIZE, "%d %%", (uint_t)total);
229 		}
230 		progress_pos = str_print(s, progress_pos);
231 	}
232 	return (0);
233 }
234 
235 void
raise_priv(void)236 raise_priv(void)
237 {
238 	if (priv_change_needed && (cur_uid != 0)) {
239 		if (seteuid(0) == 0)
240 			cur_uid = 0;
241 	}
242 }
243 
244 void
lower_priv(void)245 lower_priv(void)
246 {
247 	if (priv_change_needed && (cur_uid == 0)) {
248 		if (seteuid(ruid) == 0)
249 			cur_uid = ruid;
250 	}
251 }
252 
253 int
check_auth(uid_t uid)254 check_auth(uid_t uid)
255 {
256 	struct passwd *pw;
257 
258 
259 	pw = getpwuid(uid);
260 
261 	if (pw == NULL) {
262 		/* fail if we cannot get password entry */
263 		return (0);
264 	}
265 
266 	/*
267 	 * check in the RBAC authority files to see if
268 	 * the user has permission to use CDRW
269 	 */
270 	if (chkauthattr(CDRW_AUTH, pw->pw_name) != 1) {
271 		/* user is not in database, return failure */
272 		return (0);
273 	} else {
274 		return (1);
275 	}
276 }
277 
278 /*
279  * This will busy delay in ms milliseconds. Needed for cases
280  * where 1 sec wait is too long. This is needed for some newer
281  * drives which can empty the drive cache very quickly.
282  */
283 void
ms_delay(uint_t ms)284 ms_delay(uint_t ms)
285 {
286 
287 	hrtime_t start, req;
288 
289 	start = gethrtime();
290 	req = start + ((hrtime_t)ms * 1000000);
291 
292 	while (gethrtime() < req)
293 		yield();
294 }
295