1 7b19e0f1 2017-11-05 stsp /*
  2 72bcf0f9 2018-01-12 stsp  * Copyright (c) 2018 Stefan Sperling <stsp@openbsd.org>
  3 7b19e0f1 2017-11-05 stsp  *
  4 7b19e0f1 2017-11-05 stsp  * Permission to use, copy, modify, and distribute this software for any
  5 7b19e0f1 2017-11-05 stsp  * purpose with or without fee is hereby granted, provided that the above
  6 7b19e0f1 2017-11-05 stsp  * copyright notice and this permission notice appear in all copies.
  7 7b19e0f1 2017-11-05 stsp  *
  8 7b19e0f1 2017-11-05 stsp  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  9 7b19e0f1 2017-11-05 stsp  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 10 7b19e0f1 2017-11-05 stsp  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 11 7b19e0f1 2017-11-05 stsp  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 12 7b19e0f1 2017-11-05 stsp  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 13 7b19e0f1 2017-11-05 stsp  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 14 7b19e0f1 2017-11-05 stsp  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 15 7b19e0f1 2017-11-05 stsp  */
 16 7b19e0f1 2017-11-05 stsp 
 17 91a3d81f 2018-11-11 stsp 
 18 f334529e 2018-01-12 stsp #include <errno.h>
 19 7d45c7f1 2019-05-15 stsp #include <limits.h>
 20 4cc6a5a5 2020-12-15 stsp #include <stdarg.h>
 21 8251fdbc 2018-01-12 stsp #include <stdio.h>
 22 f334529e 2018-01-12 stsp #include <stdlib.h>
 23 f334529e 2018-01-12 stsp #include <string.h>
 24 91a3d81f 2018-11-11 stsp #include <zlib.h>
 25 09589288 2019-03-10 stsp #include <uuid.h>
 26 f334529e 2018-01-12 stsp 
 27 dd038bc6 2021-09-21 thomas.ad #include "got_compat.h"
 28 dd038bc6 2021-09-21 thomas.ad 
 29 4027f31a 2017-11-04 stsp #include "got_error.h"
 30 91a3d81f 2018-11-11 stsp #include "got_object.h"
 31 4027f31a 2017-11-04 stsp 
 32 91a3d81f 2018-11-11 stsp #include "got_lib_delta.h"
 33 91a3d81f 2018-11-11 stsp #include "got_lib_inflate.h"
 34 91a3d81f 2018-11-11 stsp #include "got_lib_object.h"
 35 91a3d81f 2018-11-11 stsp #include "got_lib_sha1.h"
 36 91a3d81f 2018-11-11 stsp 
 37 2b4402a2 2017-11-05 stsp #ifndef nitems
 38 2b4402a2 2017-11-05 stsp #define nitems(_a) (sizeof(_a) / sizeof((_a)[0]))
 39 f0678b77 2021-09-21 thomas.ad #endif
 40 f0678b77 2021-09-21 thomas.ad 
 41 f0678b77 2021-09-21 thomas.ad #if defined(__GLIBC__)
 42 f0678b77 2021-09-21 thomas.ad 	/*
 43 f0678b77 2021-09-21 thomas.ad 	 * The autoconf test for strerror_r is broken in current versions
 44 f0678b77 2021-09-21 thomas.ad 	 * of autoconf: https://savannah.gnu.org/support/?110367
 45 f0678b77 2021-09-21 thomas.ad 	 */
 46 f0678b77 2021-09-21 thomas.ad #define strerror_r __xpg_strerror_r
 47 2b4402a2 2017-11-05 stsp #endif
 48 4027f31a 2017-11-04 stsp 
 49 c884fd0a 2020-12-21 stsp static struct got_custom_error {
 50 c884fd0a 2020-12-21 stsp 	struct got_error err;
 51 c884fd0a 2020-12-21 stsp 	char msg[4080];
 52 c884fd0a 2020-12-21 stsp } custom_errors[16];
 53 c884fd0a 2020-12-21 stsp 
 54 c884fd0a 2020-12-21 stsp static struct got_custom_error *
 55 c884fd0a 2020-12-21 stsp get_custom_err(void)
 56 c884fd0a 2020-12-21 stsp {
 57 c884fd0a 2020-12-21 stsp 	static unsigned int idx;
 58 c884fd0a 2020-12-21 stsp 	return &custom_errors[(idx++) % nitems(custom_errors)];
 59 c884fd0a 2020-12-21 stsp }
 60 c884fd0a 2020-12-21 stsp 
 61 4027f31a 2017-11-04 stsp const struct got_error *
 62 4027f31a 2017-11-04 stsp got_error(int code)
 63 4027f31a 2017-11-04 stsp {
 64 16aeacf7 2020-11-26 stsp 	size_t i;
 65 4027f31a 2017-11-04 stsp 
 66 4027f31a 2017-11-04 stsp 	for (i = 0; i < nitems(got_errors); i++) {
 67 4027f31a 2017-11-04 stsp 		if (code == got_errors[i].code)
 68 4027f31a 2017-11-04 stsp 			return &got_errors[i];
 69 4027f31a 2017-11-04 stsp 	}
 70 4027f31a 2017-11-04 stsp 
 71 f334529e 2018-01-12 stsp 	abort();
 72 4027f31a 2017-11-04 stsp }
 73 f334529e 2018-01-12 stsp 
 74 f334529e 2018-01-12 stsp const struct got_error *
 75 91a3d81f 2018-11-11 stsp got_error_msg(int code, const char *msg)
 76 91a3d81f 2018-11-11 stsp {
 77 c884fd0a 2020-12-21 stsp 	struct got_custom_error *cerr = get_custom_err();
 78 c884fd0a 2020-12-21 stsp 	struct got_error *err = &cerr->err;
 79 16aeacf7 2020-11-26 stsp 	size_t i;
 80 91a3d81f 2018-11-11 stsp 
 81 91a3d81f 2018-11-11 stsp 	for (i = 0; i < nitems(got_errors); i++) {
 82 91a3d81f 2018-11-11 stsp 		if (code == got_errors[i].code) {
 83 c884fd0a 2020-12-21 stsp 			err->code = code;
 84 c884fd0a 2020-12-21 stsp 			strlcpy(cerr->msg, msg, sizeof(cerr->msg));
 85 c884fd0a 2020-12-21 stsp 			err->msg = cerr->msg;
 86 c884fd0a 2020-12-21 stsp 			return err;
 87 91a3d81f 2018-11-11 stsp 		}
 88 91a3d81f 2018-11-11 stsp 	}
 89 91a3d81f 2018-11-11 stsp 
 90 91a3d81f 2018-11-11 stsp 	abort();
 91 91a3d81f 2018-11-11 stsp }
 92 91a3d81f 2018-11-11 stsp 
 93 91a3d81f 2018-11-11 stsp const struct got_error *
 94 638f9024 2019-05-13 stsp got_error_from_errno(const char *prefix)
 95 f334529e 2018-01-12 stsp {
 96 c884fd0a 2020-12-21 stsp 	struct got_custom_error *cerr = get_custom_err();
 97 c884fd0a 2020-12-21 stsp 	struct got_error *err = &cerr->err;
 98 9a02f8b7 2020-12-21 stsp 	char strerr[128];
 99 f334529e 2018-01-12 stsp 
100 9a02f8b7 2020-12-21 stsp 	strerror_r(errno, strerr, sizeof(strerr));
101 9a02f8b7 2020-12-21 stsp 	snprintf(cerr->msg, sizeof(cerr->msg), "%s: %s", prefix, strerr);
102 230a42bd 2019-05-11 jcs 
103 c884fd0a 2020-12-21 stsp 	err->code = GOT_ERR_ERRNO;
104 c884fd0a 2020-12-21 stsp 	err->msg = cerr->msg;
105 c884fd0a 2020-12-21 stsp 	return err;
106 f334529e 2018-01-12 stsp }
107 8251fdbc 2018-01-12 stsp 
108 8251fdbc 2018-01-12 stsp const struct got_error *
109 638f9024 2019-05-13 stsp got_error_from_errno2(const char *prefix, const char *prefix2)
110 48b8b0eb 2019-05-11 jcs {
111 c884fd0a 2020-12-21 stsp 	struct got_custom_error *cerr = get_custom_err();
112 c884fd0a 2020-12-21 stsp 	struct got_error *err = &cerr->err;
113 9a02f8b7 2020-12-21 stsp 	char strerr[128];
114 48b8b0eb 2019-05-11 jcs 
115 9a02f8b7 2020-12-21 stsp 	strerror_r(errno, strerr, sizeof(strerr));
116 c884fd0a 2020-12-21 stsp 	snprintf(cerr->msg, sizeof(cerr->msg), "%s: %s: %s", prefix, prefix2,
117 9a02f8b7 2020-12-21 stsp 	    strerr);
118 48b8b0eb 2019-05-11 jcs 
119 c884fd0a 2020-12-21 stsp 	err->code = GOT_ERR_ERRNO;
120 c884fd0a 2020-12-21 stsp 	err->msg = cerr->msg;
121 c884fd0a 2020-12-21 stsp 	return err;
122 48b8b0eb 2019-05-11 jcs }
123 48b8b0eb 2019-05-11 jcs 
124 48b8b0eb 2019-05-11 jcs const struct got_error *
125 638f9024 2019-05-13 stsp got_error_from_errno3(const char *prefix, const char *prefix2,
126 230a42bd 2019-05-11 jcs     const char *prefix3)
127 230a42bd 2019-05-11 jcs {
128 c884fd0a 2020-12-21 stsp 	struct got_custom_error *cerr = get_custom_err();
129 c884fd0a 2020-12-21 stsp 	struct got_error *err = &cerr->err;
130 9a02f8b7 2020-12-21 stsp 	char strerr[128];
131 230a42bd 2019-05-11 jcs 
132 9a02f8b7 2020-12-21 stsp 	strerror_r(errno, strerr, sizeof(strerr));
133 c884fd0a 2020-12-21 stsp 	snprintf(cerr->msg, sizeof(cerr->msg), "%s: %s: %s: %s", prefix,
134 9a02f8b7 2020-12-21 stsp 	    prefix2, prefix3, strerr);
135 230a42bd 2019-05-11 jcs 
136 c884fd0a 2020-12-21 stsp 	err->code = GOT_ERR_ERRNO;
137 c884fd0a 2020-12-21 stsp 	err->msg = cerr->msg;
138 c884fd0a 2020-12-21 stsp 	return err;
139 230a42bd 2019-05-11 jcs }
140 230a42bd 2019-05-11 jcs 
141 230a42bd 2019-05-11 jcs const struct got_error *
142 4cc6a5a5 2020-12-15 stsp got_error_from_errno_fmt(const char *fmt, ...)
143 4cc6a5a5 2020-12-15 stsp {
144 c884fd0a 2020-12-21 stsp 	struct got_custom_error *cerr = get_custom_err();
145 c884fd0a 2020-12-21 stsp 	struct got_error *err = &cerr->err;
146 4cc6a5a5 2020-12-15 stsp 	char buf[PATH_MAX * 4];
147 9a02f8b7 2020-12-21 stsp 	char strerr[128];
148 4cc6a5a5 2020-12-15 stsp 	va_list ap;
149 4cc6a5a5 2020-12-15 stsp 
150 4cc6a5a5 2020-12-15 stsp 	va_start(ap, fmt);
151 4cc6a5a5 2020-12-15 stsp 	vsnprintf(buf, sizeof(buf), fmt, ap);
152 4cc6a5a5 2020-12-15 stsp 	va_end(ap);
153 4cc6a5a5 2020-12-15 stsp 
154 f0678b77 2021-09-21 thomas.ad #ifdef __GLIBC__
155 f0678b77 2021-09-21 thomas.ad 	/*
156 f0678b77 2021-09-21 thomas.ad 	 * The autoconf test for strerror_r is broken in current versions
157 f0678b77 2021-09-21 thomas.ad 	 * of autoconf: https://savannah.gnu.org/support/?110367
158 f0678b77 2021-09-21 thomas.ad 	 */
159 f0678b77 2021-09-21 thomas.ad 	__xpg_strerror_r(errno, strerr, sizeof(strerr));
160 f0678b77 2021-09-21 thomas.ad #else
161 9a02f8b7 2020-12-21 stsp 	strerror_r(errno, strerr, sizeof(strerr));
162 f0678b77 2021-09-21 thomas.ad #endif
163 9a02f8b7 2020-12-21 stsp 	snprintf(cerr->msg, sizeof(cerr->msg), "%s: %s", buf, strerr);
164 4cc6a5a5 2020-12-15 stsp 
165 c884fd0a 2020-12-21 stsp 	err->code = GOT_ERR_ERRNO;
166 c884fd0a 2020-12-21 stsp 	err->msg = cerr->msg;
167 c884fd0a 2020-12-21 stsp 	return err;
168 4cc6a5a5 2020-12-15 stsp }
169 4cc6a5a5 2020-12-15 stsp 
170 4cc6a5a5 2020-12-15 stsp const struct got_error *
171 2af4a041 2019-05-11 jcs got_error_set_errno(int code, const char *prefix)
172 1a76625f 2018-10-22 stsp {
173 1a76625f 2018-10-22 stsp 	errno = code;
174 638f9024 2019-05-13 stsp 	return got_error_from_errno(prefix);
175 1a76625f 2018-10-22 stsp }
176 1a76625f 2018-10-22 stsp 
177 1a76625f 2018-10-22 stsp const struct got_error *
178 8251fdbc 2018-01-12 stsp got_ferror(FILE *f, int code)
179 8251fdbc 2018-01-12 stsp {
180 8251fdbc 2018-01-12 stsp 	if (ferror(f))
181 638f9024 2019-05-13 stsp 		return got_error_from_errno("");
182 8251fdbc 2018-01-12 stsp 	return got_error(code);
183 8251fdbc 2018-01-12 stsp }
184 91a3d81f 2018-11-11 stsp 
185 91a3d81f 2018-11-11 stsp const struct got_error *
186 91a3d81f 2018-11-11 stsp got_error_no_obj(struct got_object_id *id)
187 91a3d81f 2018-11-11 stsp {
188 c884fd0a 2020-12-21 stsp 	char msg[sizeof("object   not found") + SHA1_DIGEST_STRING_LENGTH];
189 91a3d81f 2018-11-11 stsp 	char id_str[SHA1_DIGEST_STRING_LENGTH];
190 91a3d81f 2018-11-11 stsp 	int ret;
191 91a3d81f 2018-11-11 stsp 
192 91a3d81f 2018-11-11 stsp 	if (!got_sha1_digest_to_str(id->sha1, id_str, sizeof(id_str)))
193 91a3d81f 2018-11-11 stsp 		return got_error(GOT_ERR_NO_OBJ);
194 91a3d81f 2018-11-11 stsp 
195 91a3d81f 2018-11-11 stsp 	ret = snprintf(msg, sizeof(msg), "object %s not found", id_str);
196 91a3d81f 2018-11-11 stsp 	if (ret == -1 || ret >= sizeof(msg))
197 91a3d81f 2018-11-11 stsp 		return got_error(GOT_ERR_NO_OBJ);
198 91a3d81f 2018-11-11 stsp 
199 91a3d81f 2018-11-11 stsp 	return got_error_msg(GOT_ERR_NO_OBJ, msg);
200 91a3d81f 2018-11-11 stsp }
201 2aa0475c 2019-02-03 stsp 
202 2aa0475c 2019-02-03 stsp const struct got_error *
203 2aa0475c 2019-02-03 stsp got_error_not_ref(const char *refname)
204 2aa0475c 2019-02-03 stsp {
205 c884fd0a 2020-12-21 stsp 	char msg[sizeof("reference   not found") + 1004];
206 2aa0475c 2019-02-03 stsp 	int ret;
207 2aa0475c 2019-02-03 stsp 
208 2aa0475c 2019-02-03 stsp 	ret = snprintf(msg, sizeof(msg), "reference %s not found", refname);
209 2aa0475c 2019-02-03 stsp 	if (ret == -1 || ret >= sizeof(msg))
210 2aa0475c 2019-02-03 stsp 		return got_error(GOT_ERR_NOT_REF);
211 2aa0475c 2019-02-03 stsp 
212 2aa0475c 2019-02-03 stsp 	return got_error_msg(GOT_ERR_NOT_REF, msg);
213 2aa0475c 2019-02-03 stsp }
214 09589288 2019-03-10 stsp 
215 09589288 2019-03-10 stsp const struct got_error *
216 cc483380 2019-09-01 stsp got_error_uuid(uint32_t uuid_status, const char *prefix)
217 09589288 2019-03-10 stsp {
218 09589288 2019-03-10 stsp 	switch (uuid_status) {
219 09589288 2019-03-10 stsp 	case uuid_s_ok:
220 09589288 2019-03-10 stsp 		return NULL;
221 09589288 2019-03-10 stsp 	case uuid_s_bad_version:
222 09589288 2019-03-10 stsp 		return got_error(GOT_ERR_UUID_VERSION);
223 09589288 2019-03-10 stsp 	case uuid_s_invalid_string_uuid:
224 09589288 2019-03-10 stsp 		return got_error(GOT_ERR_UUID_INVALID);
225 09589288 2019-03-10 stsp 	case uuid_s_no_memory:
226 cc483380 2019-09-01 stsp 		return got_error_set_errno(ENOMEM, prefix);
227 09589288 2019-03-10 stsp 	default:
228 09589288 2019-03-10 stsp 		return got_error(GOT_ERR_UUID);
229 09589288 2019-03-10 stsp 	}
230 09589288 2019-03-10 stsp }
231 df056ada 2019-05-15 stsp 
232 df056ada 2019-05-15 stsp const struct got_error *
233 df056ada 2019-05-15 stsp got_error_path(const char *path, int code)
234 df056ada 2019-05-15 stsp {
235 c884fd0a 2020-12-21 stsp 	struct got_custom_error *cerr = get_custom_err();
236 c884fd0a 2020-12-21 stsp 	struct got_error *err = &cerr->err;
237 16aeacf7 2020-11-26 stsp 	size_t i;
238 df056ada 2019-05-15 stsp 
239 df056ada 2019-05-15 stsp 	for (i = 0; i < nitems(got_errors); i++) {
240 df056ada 2019-05-15 stsp 		if (code == got_errors[i].code) {
241 c884fd0a 2020-12-21 stsp 			err->code = code;
242 c884fd0a 2020-12-21 stsp 			snprintf(cerr->msg, sizeof(cerr->msg), "%s: %s", path,
243 df056ada 2019-05-15 stsp 			    got_errors[i].msg);
244 c884fd0a 2020-12-21 stsp 			err->msg = cerr->msg;
245 c884fd0a 2020-12-21 stsp 			return err;
246 df056ada 2019-05-15 stsp 		}
247 df056ada 2019-05-15 stsp 	}
248 df056ada 2019-05-15 stsp 
249 df056ada 2019-05-15 stsp 	abort();
250 df056ada 2019-05-15 stsp }
251 73e7eb7d 2020-12-15 stsp 
252 73e7eb7d 2020-12-15 stsp const struct got_error *
253 73e7eb7d 2020-12-15 stsp got_error_fmt(int code, const char *fmt, ...)
254 73e7eb7d 2020-12-15 stsp {
255 c884fd0a 2020-12-21 stsp 	struct got_custom_error *cerr = get_custom_err();
256 c884fd0a 2020-12-21 stsp 	struct got_error *err = &cerr->err;
257 73e7eb7d 2020-12-15 stsp 	char buf[PATH_MAX * 4];
258 73e7eb7d 2020-12-15 stsp 	va_list ap;
259 73e7eb7d 2020-12-15 stsp 	size_t i;
260 73e7eb7d 2020-12-15 stsp 
261 73e7eb7d 2020-12-15 stsp 	va_start(ap, fmt);
262 73e7eb7d 2020-12-15 stsp 	vsnprintf(buf, sizeof(buf), fmt, ap);
263 73e7eb7d 2020-12-15 stsp 	va_end(ap);
264 73e7eb7d 2020-12-15 stsp 
265 73e7eb7d 2020-12-15 stsp 	for (i = 0; i < nitems(got_errors); i++) {
266 73e7eb7d 2020-12-15 stsp 		if (code == got_errors[i].code) {
267 c884fd0a 2020-12-21 stsp 			err->code = code;
268 c884fd0a 2020-12-21 stsp 			snprintf(cerr->msg, sizeof(cerr->msg), "%s: %s", buf,
269 73e7eb7d 2020-12-15 stsp 			    got_errors[i].msg);
270 c884fd0a 2020-12-21 stsp 			err->msg = cerr->msg;
271 c884fd0a 2020-12-21 stsp 			return err;
272 73e7eb7d 2020-12-15 stsp 		}
273 73e7eb7d 2020-12-15 stsp 	}
274 73e7eb7d 2020-12-15 stsp 
275 73e7eb7d 2020-12-15 stsp 	abort();
276 73e7eb7d 2020-12-15 stsp }