1 069bbb86 2022-03-07 thomas /*
  2 069bbb86 2022-03-07 thomas  * Copyright (c) 2022 Omar Polo <op@openbsd.org>
  3 069bbb86 2022-03-07 thomas  *
  4 069bbb86 2022-03-07 thomas  * Permission to use, copy, modify, and distribute this software for any
  5 069bbb86 2022-03-07 thomas  * purpose with or without fee is hereby granted, provided that the above
  6 069bbb86 2022-03-07 thomas  * copyright notice and this permission notice appear in all copies.
  7 069bbb86 2022-03-07 thomas  *
  8 069bbb86 2022-03-07 thomas  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  9 069bbb86 2022-03-07 thomas  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 10 069bbb86 2022-03-07 thomas  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 11 069bbb86 2022-03-07 thomas  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 12 069bbb86 2022-03-07 thomas  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 13 069bbb86 2022-03-07 thomas  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 14 069bbb86 2022-03-07 thomas  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 15 069bbb86 2022-03-07 thomas  *
 16 069bbb86 2022-03-07 thomas  * Apply patches.
 17 069bbb86 2022-03-07 thomas  *
 18 069bbb86 2022-03-07 thomas  * Things that are still missing:
 19 069bbb86 2022-03-07 thomas  *     + "No final newline" handling
 20 069bbb86 2022-03-07 thomas  *
 21 069bbb86 2022-03-07 thomas  * Things that we may want to support:
 22 069bbb86 2022-03-07 thomas  *     + support indented patches?
 23 069bbb86 2022-03-07 thomas  *     + support other kinds of patches?
 24 069bbb86 2022-03-07 thomas  */
 25 069bbb86 2022-03-07 thomas 
 26 069bbb86 2022-03-07 thomas #include <sys/types.h>
 27 069bbb86 2022-03-07 thomas #include <sys/queue.h>
 28 069bbb86 2022-03-07 thomas #include <sys/socket.h>
 29 7dd42450 2022-03-13 thomas #include <sys/stat.h>
 30 069bbb86 2022-03-07 thomas #include <sys/uio.h>
 31 069bbb86 2022-03-07 thomas 
 32 42d9d68e 2022-03-13 thomas #include <errno.h>
 33 069bbb86 2022-03-07 thomas #include <limits.h>
 34 069bbb86 2022-03-07 thomas #include <stdint.h>
 35 069bbb86 2022-03-07 thomas #include <stdio.h>
 36 069bbb86 2022-03-07 thomas #include <stdlib.h>
 37 069bbb86 2022-03-07 thomas #include <string.h>
 38 069bbb86 2022-03-07 thomas #include <unistd.h>
 39 069bbb86 2022-03-07 thomas #include <imsg.h>
 40 069bbb86 2022-03-07 thomas 
 41 069bbb86 2022-03-07 thomas #include "got_error.h"
 42 069bbb86 2022-03-07 thomas #include "got_object.h"
 43 069bbb86 2022-03-07 thomas #include "got_path.h"
 44 069bbb86 2022-03-07 thomas #include "got_reference.h"
 45 069bbb86 2022-03-07 thomas #include "got_cancel.h"
 46 069bbb86 2022-03-07 thomas #include "got_worktree.h"
 47 069bbb86 2022-03-07 thomas #include "got_opentemp.h"
 48 069bbb86 2022-03-07 thomas #include "got_patch.h"
 49 069bbb86 2022-03-07 thomas 
 50 069bbb86 2022-03-07 thomas #include "got_lib_delta.h"
 51 069bbb86 2022-03-07 thomas #include "got_lib_object.h"
 52 069bbb86 2022-03-07 thomas #include "got_lib_privsep.h"
 53 069bbb86 2022-03-07 thomas 
 54 069bbb86 2022-03-07 thomas #define MIN(a, b) ((a) < (b) ? (a) : (b))
 55 069bbb86 2022-03-07 thomas 
 56 069bbb86 2022-03-07 thomas struct got_patch_hunk {
 57 069bbb86 2022-03-07 thomas 	STAILQ_ENTRY(got_patch_hunk) entries;
 58 069bbb86 2022-03-07 thomas 	long	old_from;
 59 069bbb86 2022-03-07 thomas 	long	old_lines;
 60 069bbb86 2022-03-07 thomas 	long	new_from;
 61 069bbb86 2022-03-07 thomas 	long	new_lines;
 62 069bbb86 2022-03-07 thomas 	size_t	len;
 63 069bbb86 2022-03-07 thomas 	size_t	cap;
 64 069bbb86 2022-03-07 thomas 	char	**lines;
 65 069bbb86 2022-03-07 thomas };
 66 069bbb86 2022-03-07 thomas 
 67 069bbb86 2022-03-07 thomas struct got_patch {
 68 069bbb86 2022-03-07 thomas 	char	*old;
 69 069bbb86 2022-03-07 thomas 	char	*new;
 70 069bbb86 2022-03-07 thomas 	STAILQ_HEAD(, got_patch_hunk) head;
 71 069bbb86 2022-03-07 thomas };
 72 069bbb86 2022-03-07 thomas 
 73 069bbb86 2022-03-07 thomas static const struct got_error *
 74 069bbb86 2022-03-07 thomas send_patch(struct imsgbuf *ibuf, int fd)
 75 069bbb86 2022-03-07 thomas {
 76 069bbb86 2022-03-07 thomas 	const struct got_error *err = NULL;
 77 069bbb86 2022-03-07 thomas 
 78 069bbb86 2022-03-07 thomas 	if (imsg_compose(ibuf, GOT_IMSG_PATCH_FILE, 0, 0, fd,
 79 069bbb86 2022-03-07 thomas 	    NULL, 0) == -1) {
 80 069bbb86 2022-03-07 thomas 		err = got_error_from_errno(
 81 069bbb86 2022-03-07 thomas 		    "imsg_compose GOT_IMSG_PATCH_FILE");
 82 069bbb86 2022-03-07 thomas 		close(fd);
 83 069bbb86 2022-03-07 thomas 		return err;
 84 069bbb86 2022-03-07 thomas 	}
 85 069bbb86 2022-03-07 thomas 
 86 069bbb86 2022-03-07 thomas 	if (imsg_flush(ibuf) == -1) {
 87 069bbb86 2022-03-07 thomas 		err = got_error_from_errno("imsg_flush");
 88 069bbb86 2022-03-07 thomas 		imsg_clear(ibuf);
 89 069bbb86 2022-03-07 thomas 	}
 90 069bbb86 2022-03-07 thomas 
 91 069bbb86 2022-03-07 thomas 	return err;
 92 069bbb86 2022-03-07 thomas }
 93 069bbb86 2022-03-07 thomas 
 94 069bbb86 2022-03-07 thomas static void
 95 069bbb86 2022-03-07 thomas patch_free(struct got_patch *p)
 96 069bbb86 2022-03-07 thomas {
 97 069bbb86 2022-03-07 thomas 	struct got_patch_hunk *h;
 98 069bbb86 2022-03-07 thomas 	size_t i;
 99 069bbb86 2022-03-07 thomas 
100 069bbb86 2022-03-07 thomas 	while (!STAILQ_EMPTY(&p->head)) {
101 069bbb86 2022-03-07 thomas 		h = STAILQ_FIRST(&p->head);
102 069bbb86 2022-03-07 thomas 		STAILQ_REMOVE_HEAD(&p->head, entries);
103 069bbb86 2022-03-07 thomas 
104 069bbb86 2022-03-07 thomas 		for (i = 0; i < h->len; ++i)
105 069bbb86 2022-03-07 thomas 			free(h->lines[i]);
106 069bbb86 2022-03-07 thomas 		free(h->lines);
107 069bbb86 2022-03-07 thomas 		free(h);
108 069bbb86 2022-03-07 thomas 	}
109 069bbb86 2022-03-07 thomas 
110 069bbb86 2022-03-07 thomas 	free(p->new);
111 069bbb86 2022-03-07 thomas 	free(p->old);
112 069bbb86 2022-03-07 thomas }
113 069bbb86 2022-03-07 thomas 
114 069bbb86 2022-03-07 thomas static const struct got_error *
115 069bbb86 2022-03-07 thomas pushline(struct got_patch_hunk *h, const char *line)
116 069bbb86 2022-03-07 thomas {
117 069bbb86 2022-03-07 thomas 	void 	*t;
118 069bbb86 2022-03-07 thomas 	size_t	 newcap;
119 069bbb86 2022-03-07 thomas 
120 069bbb86 2022-03-07 thomas 	if (h->len == h->cap) {
121 069bbb86 2022-03-07 thomas 		if ((newcap = h->cap * 1.5) == 0)
122 069bbb86 2022-03-07 thomas 			newcap = 16;
123 069bbb86 2022-03-07 thomas 		t = recallocarray(h->lines, h->cap, newcap,
124 069bbb86 2022-03-07 thomas 		    sizeof(h->lines[0]));
125 069bbb86 2022-03-07 thomas 		if (t == NULL)
126 069bbb86 2022-03-07 thomas 			return got_error_from_errno("recallocarray");
127 069bbb86 2022-03-07 thomas 		h->lines = t;
128 069bbb86 2022-03-07 thomas 		h->cap = newcap;
129 069bbb86 2022-03-07 thomas 	}
130 069bbb86 2022-03-07 thomas 
131 069bbb86 2022-03-07 thomas 	if ((t = strdup(line)) == NULL)
132 069bbb86 2022-03-07 thomas 		return got_error_from_errno("strdup");
133 069bbb86 2022-03-07 thomas 
134 069bbb86 2022-03-07 thomas 	h->lines[h->len++] = t;
135 069bbb86 2022-03-07 thomas 	return NULL;
136 069bbb86 2022-03-07 thomas }
137 069bbb86 2022-03-07 thomas 
138 069bbb86 2022-03-07 thomas static const struct got_error *
139 069bbb86 2022-03-07 thomas recv_patch(struct imsgbuf *ibuf, int *done, struct got_patch *p)
140 069bbb86 2022-03-07 thomas {
141 069bbb86 2022-03-07 thomas 	const struct got_error *err = NULL;
142 069bbb86 2022-03-07 thomas 	struct imsg imsg;
143 069bbb86 2022-03-07 thomas 	struct got_imsg_patch_hunk hdr;
144 069bbb86 2022-03-07 thomas 	struct got_imsg_patch patch;
145 069bbb86 2022-03-07 thomas 	struct got_patch_hunk *h = NULL;
146 069bbb86 2022-03-07 thomas 	size_t datalen;
147 069bbb86 2022-03-07 thomas 
148 069bbb86 2022-03-07 thomas 	memset(p, 0, sizeof(*p));
149 069bbb86 2022-03-07 thomas 	STAILQ_INIT(&p->head);
150 069bbb86 2022-03-07 thomas 
151 069bbb86 2022-03-07 thomas 	err = got_privsep_recv_imsg(&imsg, ibuf, 0);
152 069bbb86 2022-03-07 thomas 	if (err)
153 069bbb86 2022-03-07 thomas 		return err;
154 069bbb86 2022-03-07 thomas 	if (imsg.hdr.type == GOT_IMSG_PATCH_EOF) {
155 069bbb86 2022-03-07 thomas 		*done = 1;
156 069bbb86 2022-03-07 thomas 		goto done;
157 069bbb86 2022-03-07 thomas 	}
158 069bbb86 2022-03-07 thomas 	if (imsg.hdr.type != GOT_IMSG_PATCH) {
159 069bbb86 2022-03-07 thomas 		err = got_error(GOT_ERR_PRIVSEP_MSG);
160 069bbb86 2022-03-07 thomas 		goto done;
161 069bbb86 2022-03-07 thomas 	}
162 069bbb86 2022-03-07 thomas 	datalen = imsg.hdr.len - IMSG_HEADER_SIZE;
163 069bbb86 2022-03-07 thomas 	if (datalen != sizeof(patch)) {
164 069bbb86 2022-03-07 thomas 		err = got_error(GOT_ERR_PRIVSEP_LEN);
165 069bbb86 2022-03-07 thomas 		goto done;
166 069bbb86 2022-03-07 thomas 	}
167 069bbb86 2022-03-07 thomas 	memcpy(&patch, imsg.data, sizeof(patch));
168 069bbb86 2022-03-07 thomas 	if (*patch.old != '\0' && (p->old = strdup(patch.old)) == NULL) {
169 069bbb86 2022-03-07 thomas 		err = got_error_from_errno("strdup");
170 069bbb86 2022-03-07 thomas 		goto done;
171 069bbb86 2022-03-07 thomas 	}
172 069bbb86 2022-03-07 thomas 	if (*patch.new != '\0' && (p->new = strdup(patch.new)) == NULL) {
173 069bbb86 2022-03-07 thomas 		err = got_error_from_errno("strdup");
174 069bbb86 2022-03-07 thomas 		goto done;
175 069bbb86 2022-03-07 thomas 	}
176 64c9e565 2022-03-13 thomas 	if (p->old == NULL && p->new == NULL) {
177 64c9e565 2022-03-13 thomas 		err = got_error(GOT_ERR_PATCH_MALFORMED);
178 64c9e565 2022-03-13 thomas 		goto done;
179 64c9e565 2022-03-13 thomas 	}
180 069bbb86 2022-03-07 thomas 
181 069bbb86 2022-03-07 thomas 	imsg_free(&imsg);
182 069bbb86 2022-03-07 thomas 
183 069bbb86 2022-03-07 thomas 	for (;;) {
184 069bbb86 2022-03-07 thomas 		char *t;
185 069bbb86 2022-03-07 thomas 
186 069bbb86 2022-03-07 thomas 		err = got_privsep_recv_imsg(&imsg, ibuf, 0);
187 069bbb86 2022-03-07 thomas 		if (err)
188 069bbb86 2022-03-07 thomas 			return err;
189 069bbb86 2022-03-07 thomas 
190 069bbb86 2022-03-07 thomas 		switch (imsg.hdr.type) {
191 069bbb86 2022-03-07 thomas 		case GOT_IMSG_PATCH_DONE:
192 069bbb86 2022-03-07 thomas 			goto done;
193 069bbb86 2022-03-07 thomas 		case GOT_IMSG_PATCH_HUNK:
194 069bbb86 2022-03-07 thomas 			datalen = imsg.hdr.len - IMSG_HEADER_SIZE;
195 069bbb86 2022-03-07 thomas 			if (datalen != sizeof(hdr)) {
196 069bbb86 2022-03-07 thomas 				err = got_error(GOT_ERR_PRIVSEP_LEN);
197 069bbb86 2022-03-07 thomas 				goto done;
198 069bbb86 2022-03-07 thomas 			}
199 069bbb86 2022-03-07 thomas 			memcpy(&hdr, imsg.data, sizeof(hdr));
200 069bbb86 2022-03-07 thomas 			if ((h = calloc(1, sizeof(*h))) == NULL) {
201 069bbb86 2022-03-07 thomas 				err = got_error_from_errno("calloc");
202 069bbb86 2022-03-07 thomas 				goto done;
203 069bbb86 2022-03-07 thomas 			}
204 069bbb86 2022-03-07 thomas 			h->old_from = hdr.oldfrom;
205 069bbb86 2022-03-07 thomas 			h->old_lines = hdr.oldlines;
206 069bbb86 2022-03-07 thomas 			h->new_from = hdr.newfrom;
207 069bbb86 2022-03-07 thomas 			h->new_lines = hdr.newlines;
208 069bbb86 2022-03-07 thomas 			STAILQ_INSERT_TAIL(&p->head, h, entries);
209 069bbb86 2022-03-07 thomas 			break;
210 069bbb86 2022-03-07 thomas 		case GOT_IMSG_PATCH_LINE:
211 069bbb86 2022-03-07 thomas 			if (h == NULL) {
212 069bbb86 2022-03-07 thomas 				err = got_error(GOT_ERR_PRIVSEP_MSG);
213 069bbb86 2022-03-07 thomas 				goto done;
214 069bbb86 2022-03-07 thomas 			}
215 069bbb86 2022-03-07 thomas 			datalen = imsg.hdr.len - IMSG_HEADER_SIZE;
216 069bbb86 2022-03-07 thomas 			t = imsg.data;
217 069bbb86 2022-03-07 thomas 			/* at least one char plus newline */
218 069bbb86 2022-03-07 thomas 			if (datalen < 2 || t[datalen-1] != '\0') {
219 069bbb86 2022-03-07 thomas 				err = got_error(GOT_ERR_PRIVSEP_MSG);
220 069bbb86 2022-03-07 thomas 				goto done;
221 069bbb86 2022-03-07 thomas 			}
222 069bbb86 2022-03-07 thomas 			if (*t != ' ' && *t != '-' && *t != '+') {
223 069bbb86 2022-03-07 thomas 				err = got_error(GOT_ERR_PRIVSEP_MSG);
224 069bbb86 2022-03-07 thomas 				goto done;
225 069bbb86 2022-03-07 thomas 			}
226 069bbb86 2022-03-07 thomas 			err = pushline(h, t);
227 069bbb86 2022-03-07 thomas 			if (err)
228 069bbb86 2022-03-07 thomas 				goto done;
229 069bbb86 2022-03-07 thomas 			break;
230 069bbb86 2022-03-07 thomas 		default:
231 069bbb86 2022-03-07 thomas 			err = got_error(GOT_ERR_PRIVSEP_MSG);
232 069bbb86 2022-03-07 thomas 			goto done;
233 069bbb86 2022-03-07 thomas 		}
234 069bbb86 2022-03-07 thomas 
235 069bbb86 2022-03-07 thomas 		imsg_free(&imsg);
236 069bbb86 2022-03-07 thomas 	}
237 069bbb86 2022-03-07 thomas 
238 069bbb86 2022-03-07 thomas done:
239 069bbb86 2022-03-07 thomas 	imsg_free(&imsg);
240 069bbb86 2022-03-07 thomas 	return err;
241 069bbb86 2022-03-07 thomas }
242 069bbb86 2022-03-07 thomas 
243 069bbb86 2022-03-07 thomas /*
244 069bbb86 2022-03-07 thomas  * Copy data from orig starting at copypos until pos into tmp.
245 069bbb86 2022-03-07 thomas  * If pos is -1, copy until EOF.
246 069bbb86 2022-03-07 thomas  */
247 069bbb86 2022-03-07 thomas static const struct got_error *
248 069bbb86 2022-03-07 thomas copy(FILE *tmp, FILE *orig, off_t copypos, off_t pos)
249 069bbb86 2022-03-07 thomas {
250 069bbb86 2022-03-07 thomas 	char buf[BUFSIZ];
251 069bbb86 2022-03-07 thomas 	size_t len, r, w;
252 069bbb86 2022-03-07 thomas 
253 069bbb86 2022-03-07 thomas 	if (fseek(orig, copypos, SEEK_SET) == -1)
254 069bbb86 2022-03-07 thomas 		return got_error_from_errno("fseek");
255 069bbb86 2022-03-07 thomas 
256 069bbb86 2022-03-07 thomas 	while (pos == -1 || copypos < pos) {
257 069bbb86 2022-03-07 thomas 		len = sizeof(buf);
258 069bbb86 2022-03-07 thomas 		if (pos > 0)
259 069bbb86 2022-03-07 thomas 			len = MIN(len, (size_t)pos - copypos);
260 069bbb86 2022-03-07 thomas 		r = fread(buf, 1, len, orig);
261 069bbb86 2022-03-07 thomas 		if (r != len && ferror(orig))
262 069bbb86 2022-03-07 thomas 			return got_error_from_errno("fread");
263 069bbb86 2022-03-07 thomas 		w = fwrite(buf, 1, r, tmp);
264 069bbb86 2022-03-07 thomas 		if (w != r)
265 069bbb86 2022-03-07 thomas 			return got_error_from_errno("fwrite");
266 069bbb86 2022-03-07 thomas 		copypos += len;
267 069bbb86 2022-03-07 thomas 		if (r != len && feof(orig)) {
268 069bbb86 2022-03-07 thomas 			if (pos == -1)
269 069bbb86 2022-03-07 thomas 				return NULL;
270 069bbb86 2022-03-07 thomas 			return got_error(GOT_ERR_PATCH_DONT_APPLY);
271 069bbb86 2022-03-07 thomas 		}
272 069bbb86 2022-03-07 thomas 	}
273 069bbb86 2022-03-07 thomas 	return NULL;
274 069bbb86 2022-03-07 thomas }
275 069bbb86 2022-03-07 thomas 
276 069bbb86 2022-03-07 thomas static const struct got_error *
277 069bbb86 2022-03-07 thomas locate_hunk(FILE *orig, struct got_patch_hunk *h, long *lineno)
278 069bbb86 2022-03-07 thomas {
279 069bbb86 2022-03-07 thomas 	const struct got_error *err = NULL;
280 069bbb86 2022-03-07 thomas 	char *line = NULL;
281 069bbb86 2022-03-07 thomas 	char mode = *h->lines[0];
282 069bbb86 2022-03-07 thomas 	size_t linesize = 0;
283 069bbb86 2022-03-07 thomas 	ssize_t linelen;
284 069bbb86 2022-03-07 thomas 	off_t match = -1;
285 069bbb86 2022-03-07 thomas 	long match_lineno = -1;
286 069bbb86 2022-03-07 thomas 
287 069bbb86 2022-03-07 thomas 	for (;;) {
288 069bbb86 2022-03-07 thomas 		linelen = getline(&line, &linesize, orig);
289 069bbb86 2022-03-07 thomas 		if (linelen == -1) {
290 069bbb86 2022-03-07 thomas 			if (ferror(orig))
291 069bbb86 2022-03-07 thomas 				err = got_error_from_errno("getline");
292 069bbb86 2022-03-07 thomas 			else if (match == -1)
293 069bbb86 2022-03-07 thomas 				err = got_error(GOT_ERR_PATCH_DONT_APPLY);
294 069bbb86 2022-03-07 thomas 			break;
295 069bbb86 2022-03-07 thomas 		}
296 069bbb86 2022-03-07 thomas 		(*lineno)++;
297 069bbb86 2022-03-07 thomas 
298 069bbb86 2022-03-07 thomas 		if ((mode == ' ' && !strcmp(h->lines[0]+1, line)) ||
299 069bbb86 2022-03-07 thomas 		    (mode == '-' && !strcmp(h->lines[0]+1, line)) ||
300 069bbb86 2022-03-07 thomas 		    (mode == '+' && *lineno == h->old_from)) {
301 069bbb86 2022-03-07 thomas 			match = ftello(orig);
302 069bbb86 2022-03-07 thomas 			if (match == -1) {
303 069bbb86 2022-03-07 thomas 				err = got_error_from_errno("ftello");
304 069bbb86 2022-03-07 thomas 				break;
305 069bbb86 2022-03-07 thomas 			}
306 069bbb86 2022-03-07 thomas 			match -= linelen;
307 069bbb86 2022-03-07 thomas 			match_lineno = (*lineno)-1;
308 069bbb86 2022-03-07 thomas 		}
309 069bbb86 2022-03-07 thomas 
310 069bbb86 2022-03-07 thomas 		if (*lineno >= h->old_from && match != -1)
311 069bbb86 2022-03-07 thomas 			break;
312 069bbb86 2022-03-07 thomas 	}
313 069bbb86 2022-03-07 thomas 
314 069bbb86 2022-03-07 thomas 	if (err == NULL) {
315 069bbb86 2022-03-07 thomas 		*lineno = match_lineno;
316 069bbb86 2022-03-07 thomas 		if (fseek(orig, match, SEEK_SET) == -1)
317 069bbb86 2022-03-07 thomas 			err = got_error_from_errno("fseek");
318 069bbb86 2022-03-07 thomas 	}
319 069bbb86 2022-03-07 thomas 
320 069bbb86 2022-03-07 thomas 	free(line);
321 069bbb86 2022-03-07 thomas 	return err;
322 069bbb86 2022-03-07 thomas }
323 069bbb86 2022-03-07 thomas 
324 069bbb86 2022-03-07 thomas static const struct got_error *
325 069bbb86 2022-03-07 thomas test_hunk(FILE *orig, struct got_patch_hunk *h)
326 069bbb86 2022-03-07 thomas {
327 069bbb86 2022-03-07 thomas 	const struct got_error *err = NULL;
328 069bbb86 2022-03-07 thomas 	char *line = NULL;
329 069bbb86 2022-03-07 thomas 	size_t linesize = 0, i = 0;
330 069bbb86 2022-03-07 thomas 	ssize_t linelen;
331 069bbb86 2022-03-07 thomas 
332 069bbb86 2022-03-07 thomas 	for (i = 0; i < h->len; ++i) {
333 069bbb86 2022-03-07 thomas 		switch (*h->lines[i]) {
334 069bbb86 2022-03-07 thomas 		case '+':
335 069bbb86 2022-03-07 thomas 			continue;
336 069bbb86 2022-03-07 thomas 		case ' ':
337 069bbb86 2022-03-07 thomas 		case '-':
338 069bbb86 2022-03-07 thomas 			linelen = getline(&line, &linesize, orig);
339 069bbb86 2022-03-07 thomas 			if (linelen == -1) {
340 069bbb86 2022-03-07 thomas 				if (ferror(orig))
341 069bbb86 2022-03-07 thomas 					err = got_error_from_errno("getline");
342 069bbb86 2022-03-07 thomas 				else
343 069bbb86 2022-03-07 thomas 					err = got_error(
344 069bbb86 2022-03-07 thomas 					    GOT_ERR_PATCH_DONT_APPLY);
345 069bbb86 2022-03-07 thomas 				goto done;
346 069bbb86 2022-03-07 thomas 			}
347 069bbb86 2022-03-07 thomas 			if (strcmp(h->lines[i]+1, line)) {
348 069bbb86 2022-03-07 thomas 				err = got_error(GOT_ERR_PATCH_DONT_APPLY);
349 069bbb86 2022-03-07 thomas 				goto done;
350 069bbb86 2022-03-07 thomas 			}
351 069bbb86 2022-03-07 thomas 			break;
352 069bbb86 2022-03-07 thomas 		}
353 069bbb86 2022-03-07 thomas 	}
354 069bbb86 2022-03-07 thomas 
355 069bbb86 2022-03-07 thomas done:
356 069bbb86 2022-03-07 thomas 	free(line);
357 069bbb86 2022-03-07 thomas 	return err;
358 069bbb86 2022-03-07 thomas }
359 069bbb86 2022-03-07 thomas 
360 069bbb86 2022-03-07 thomas static const struct got_error *
361 069bbb86 2022-03-07 thomas apply_hunk(FILE *tmp, struct got_patch_hunk *h, long *lineno)
362 069bbb86 2022-03-07 thomas {
363 069bbb86 2022-03-07 thomas 	size_t i = 0;
364 069bbb86 2022-03-07 thomas 
365 069bbb86 2022-03-07 thomas 	for (i = 0; i < h->len; ++i) {
366 069bbb86 2022-03-07 thomas 		switch (*h->lines[i]) {
367 069bbb86 2022-03-07 thomas 		case ' ':
368 069bbb86 2022-03-07 thomas 			if (fprintf(tmp, "%s", h->lines[i]+1) < 0)
369 069bbb86 2022-03-07 thomas 				return got_error_from_errno("fprintf");
370 069bbb86 2022-03-07 thomas 			/* fallthrough */
371 069bbb86 2022-03-07 thomas 		case '-':
372 069bbb86 2022-03-07 thomas 			(*lineno)++;
373 069bbb86 2022-03-07 thomas 			break;
374 069bbb86 2022-03-07 thomas 		case '+':
375 069bbb86 2022-03-07 thomas 			if (fprintf(tmp, "%s", h->lines[i]+1) < 0)
376 069bbb86 2022-03-07 thomas 				return got_error_from_errno("fprintf");
377 069bbb86 2022-03-07 thomas 			break;
378 069bbb86 2022-03-07 thomas 		}
379 069bbb86 2022-03-07 thomas 	}
380 069bbb86 2022-03-07 thomas 	return NULL;
381 bb2ad8ff 2022-03-13 thomas }
382 069bbb86 2022-03-07 thomas 
383 bb2ad8ff 2022-03-13 thomas static const struct got_error *
384 bb2ad8ff 2022-03-13 thomas patch_file(struct got_patch *p, const char *path, FILE *tmp)
385 bb2ad8ff 2022-03-13 thomas {
386 bb2ad8ff 2022-03-13 thomas 	const struct got_error *err = NULL;
387 bb2ad8ff 2022-03-13 thomas 	struct got_patch_hunk *h;
388 bb2ad8ff 2022-03-13 thomas 	size_t i;
389 bb2ad8ff 2022-03-13 thomas 	long lineno = 0;
390 bb2ad8ff 2022-03-13 thomas 	FILE *orig;
391 bb2ad8ff 2022-03-13 thomas 	off_t copypos, pos;
392 bb2ad8ff 2022-03-13 thomas 	char *line = NULL;
393 bb2ad8ff 2022-03-13 thomas 	size_t linesize = 0;
394 bb2ad8ff 2022-03-13 thomas 	ssize_t linelen;
395 94af5a06 2022-03-08 thomas 
396 069bbb86 2022-03-07 thomas 	if (p->old == NULL) {				/* create */
397 069bbb86 2022-03-07 thomas 		h = STAILQ_FIRST(&p->head);
398 bb2ad8ff 2022-03-13 thomas 		if (h == NULL || STAILQ_NEXT(h, entries) != NULL)
399 bb2ad8ff 2022-03-13 thomas 			return got_error(GOT_ERR_PATCH_MALFORMED);
400 069bbb86 2022-03-07 thomas 		for (i = 0; i < h->len; ++i) {
401 bb2ad8ff 2022-03-13 thomas 			if (fprintf(tmp, "%s", h->lines[i]+1) < 0)
402 bb2ad8ff 2022-03-13 thomas 				return got_error_from_errno("fprintf");
403 069bbb86 2022-03-07 thomas 		}
404 bb2ad8ff 2022-03-13 thomas 		return err;
405 069bbb86 2022-03-07 thomas 	}
406 069bbb86 2022-03-07 thomas 
407 069bbb86 2022-03-07 thomas 	if ((orig = fopen(path, "r")) == NULL) {
408 069bbb86 2022-03-07 thomas 		err = got_error_from_errno2("fopen", path);
409 069bbb86 2022-03-07 thomas 		goto done;
410 069bbb86 2022-03-07 thomas 	}
411 069bbb86 2022-03-07 thomas 
412 069bbb86 2022-03-07 thomas 	copypos = 0;
413 069bbb86 2022-03-07 thomas 	STAILQ_FOREACH(h, &p->head, entries) {
414 bb2ad8ff 2022-03-13 thomas 		if (h->lines == NULL)
415 bb2ad8ff 2022-03-13 thomas 			break;
416 bb2ad8ff 2022-03-13 thomas 
417 069bbb86 2022-03-07 thomas 	tryagain:
418 069bbb86 2022-03-07 thomas 		err = locate_hunk(orig, h, &lineno);
419 069bbb86 2022-03-07 thomas 		if (err != NULL)
420 069bbb86 2022-03-07 thomas 			goto done;
421 069bbb86 2022-03-07 thomas 		if ((pos = ftello(orig)) == -1) {
422 069bbb86 2022-03-07 thomas 			err = got_error_from_errno("ftello");
423 069bbb86 2022-03-07 thomas 			goto done;
424 069bbb86 2022-03-07 thomas 		}
425 069bbb86 2022-03-07 thomas 		err = copy(tmp, orig, copypos, pos);
426 069bbb86 2022-03-07 thomas 		if (err != NULL)
427 069bbb86 2022-03-07 thomas 			goto done;
428 069bbb86 2022-03-07 thomas 		copypos = pos;
429 069bbb86 2022-03-07 thomas 
430 069bbb86 2022-03-07 thomas 		err = test_hunk(orig, h);
431 069bbb86 2022-03-07 thomas 		if (err != NULL && err->code == GOT_ERR_PATCH_DONT_APPLY) {
432 069bbb86 2022-03-07 thomas 			/*
433 069bbb86 2022-03-07 thomas 			 * try to apply the hunk again starting the search
434 069bbb86 2022-03-07 thomas 			 * after the previous partial match.
435 069bbb86 2022-03-07 thomas 			 */
436 069bbb86 2022-03-07 thomas 			if (fseek(orig, pos, SEEK_SET) == -1) {
437 069bbb86 2022-03-07 thomas 				err = got_error_from_errno("fseek");
438 069bbb86 2022-03-07 thomas 				goto done;
439 069bbb86 2022-03-07 thomas 			}
440 069bbb86 2022-03-07 thomas 			linelen = getline(&line, &linesize, orig);
441 069bbb86 2022-03-07 thomas 			if (linelen == -1) {
442 069bbb86 2022-03-07 thomas 				err = got_error_from_errno("getline");
443 069bbb86 2022-03-07 thomas 				goto done;
444 069bbb86 2022-03-07 thomas 			}
445 069bbb86 2022-03-07 thomas 			lineno++;
446 069bbb86 2022-03-07 thomas 			goto tryagain;
447 069bbb86 2022-03-07 thomas 		}
448 069bbb86 2022-03-07 thomas 		if (err != NULL)
449 069bbb86 2022-03-07 thomas 			goto done;
450 069bbb86 2022-03-07 thomas 
451 069bbb86 2022-03-07 thomas 		err = apply_hunk(tmp, h, &lineno);
452 069bbb86 2022-03-07 thomas 		if (err != NULL)
453 069bbb86 2022-03-07 thomas 			goto done;
454 069bbb86 2022-03-07 thomas 		
455 069bbb86 2022-03-07 thomas 		copypos = ftello(orig);
456 069bbb86 2022-03-07 thomas 		if (copypos == -1) {
457 069bbb86 2022-03-07 thomas 			err = got_error_from_errno("ftello");
458 069bbb86 2022-03-07 thomas 			goto done;
459 069bbb86 2022-03-07 thomas 		}
460 069bbb86 2022-03-07 thomas 	}
461 069bbb86 2022-03-07 thomas 
462 7dd42450 2022-03-13 thomas 	
463 7dd42450 2022-03-13 thomas 	if (p->new == NULL) {
464 7dd42450 2022-03-13 thomas 		struct stat sb;
465 7dd42450 2022-03-13 thomas 
466 7dd42450 2022-03-13 thomas 		if (fstat(fileno(orig), &sb) == -1)
467 7dd42450 2022-03-13 thomas 			err = got_error_from_errno("fstat");
468 7dd42450 2022-03-13 thomas 		else if (sb.st_size != copypos)
469 7dd42450 2022-03-13 thomas 			err = got_error(GOT_ERR_PATCH_DONT_APPLY);
470 7dd42450 2022-03-13 thomas 	} else if (!feof(orig))
471 069bbb86 2022-03-07 thomas 		err = copy(tmp, orig, copypos, -1);
472 bb2ad8ff 2022-03-13 thomas 
473 bb2ad8ff 2022-03-13 thomas done:
474 bb2ad8ff 2022-03-13 thomas 	if (orig != NULL)
475 bb2ad8ff 2022-03-13 thomas 		fclose(orig);
476 bb2ad8ff 2022-03-13 thomas 	return err;
477 bb2ad8ff 2022-03-13 thomas }
478 bb2ad8ff 2022-03-13 thomas 
479 bb2ad8ff 2022-03-13 thomas static const struct got_error *
480 42d9d68e 2022-03-13 thomas build_pathlist(const char *p, char **path, struct got_pathlist_head *head,
481 42d9d68e 2022-03-13 thomas     struct got_worktree *worktree)
482 42d9d68e 2022-03-13 thomas {
483 42d9d68e 2022-03-13 thomas 	const struct got_error *err;
484 42d9d68e 2022-03-13 thomas 	struct got_pathlist_entry *pe;
485 42d9d68e 2022-03-13 thomas 
486 42d9d68e 2022-03-13 thomas 	err = got_worktree_resolve_path(path, worktree, p);
487 42d9d68e 2022-03-13 thomas 	if (err == NULL)
488 42d9d68e 2022-03-13 thomas 		err = got_pathlist_insert(&pe, head, *path, NULL);
489 42d9d68e 2022-03-13 thomas 	return err;
490 42d9d68e 2022-03-13 thomas }
491 42d9d68e 2022-03-13 thomas 
492 42d9d68e 2022-03-13 thomas static const struct got_error *
493 42d9d68e 2022-03-13 thomas can_rm(void *arg, unsigned char status, unsigned char staged_status,
494 42d9d68e 2022-03-13 thomas     const char *path, struct got_object_id *blob_id,
495 42d9d68e 2022-03-13 thomas     struct got_object_id *staged_blob_id, struct got_object_id *commit_id,
496 42d9d68e 2022-03-13 thomas     int dirfd, const char *de_name)
497 42d9d68e 2022-03-13 thomas {
498 42d9d68e 2022-03-13 thomas 	if (status == GOT_STATUS_NONEXISTENT)
499 42d9d68e 2022-03-13 thomas 		return got_error_set_errno(ENOENT, path);
500 42d9d68e 2022-03-13 thomas 	if (status != GOT_STATUS_NO_CHANGE &&
501 42d9d68e 2022-03-13 thomas 	    status != GOT_STATUS_ADD &&
502 42d9d68e 2022-03-13 thomas 	    status != GOT_STATUS_MODIFY &&
503 42d9d68e 2022-03-13 thomas 	    status != GOT_STATUS_MODE_CHANGE)
504 42d9d68e 2022-03-13 thomas 		return got_error_path(path, GOT_ERR_FILE_STATUS);
505 42d9d68e 2022-03-13 thomas 	if (staged_status == GOT_STATUS_DELETE)
506 42d9d68e 2022-03-13 thomas 		return got_error_path(path, GOT_ERR_FILE_STATUS);
507 42d9d68e 2022-03-13 thomas 	return NULL;
508 42d9d68e 2022-03-13 thomas }
509 42d9d68e 2022-03-13 thomas 
510 42d9d68e 2022-03-13 thomas static const struct got_error *
511 42d9d68e 2022-03-13 thomas can_add(void *arg, unsigned char status, unsigned char staged_status,
512 42d9d68e 2022-03-13 thomas     const char *path, struct got_object_id *blob_id,
513 42d9d68e 2022-03-13 thomas     struct got_object_id *staged_blob_id, struct got_object_id *commit_id,
514 42d9d68e 2022-03-13 thomas     int dirfd, const char *de_name)
515 42d9d68e 2022-03-13 thomas {
516 42d9d68e 2022-03-13 thomas 	if (status != GOT_STATUS_NONEXISTENT)
517 42d9d68e 2022-03-13 thomas 		return got_error_path(path, GOT_ERR_FILE_STATUS);
518 42d9d68e 2022-03-13 thomas 	return NULL;
519 42d9d68e 2022-03-13 thomas }
520 42d9d68e 2022-03-13 thomas 
521 42d9d68e 2022-03-13 thomas static const struct got_error *
522 42d9d68e 2022-03-13 thomas can_edit(void *arg, unsigned char status, unsigned char staged_status,
523 42d9d68e 2022-03-13 thomas     const char *path, struct got_object_id *blob_id,
524 42d9d68e 2022-03-13 thomas     struct got_object_id *staged_blob_id, struct got_object_id *commit_id,
525 42d9d68e 2022-03-13 thomas     int dirfd, const char *de_name)
526 42d9d68e 2022-03-13 thomas {
527 42d9d68e 2022-03-13 thomas 	if (status == GOT_STATUS_NONEXISTENT)
528 42d9d68e 2022-03-13 thomas 		return got_error_set_errno(ENOENT, path);
529 42d9d68e 2022-03-13 thomas 	if (status != GOT_STATUS_NO_CHANGE &&
530 42d9d68e 2022-03-13 thomas 	    status != GOT_STATUS_ADD &&
531 42d9d68e 2022-03-13 thomas 	    status != GOT_STATUS_MODIFY)
532 42d9d68e 2022-03-13 thomas 		return got_error_path(path, GOT_ERR_FILE_STATUS);
533 42d9d68e 2022-03-13 thomas 	if (staged_status == GOT_STATUS_DELETE)
534 42d9d68e 2022-03-13 thomas 		return got_error_path(path, GOT_ERR_FILE_STATUS);
535 42d9d68e 2022-03-13 thomas 	return NULL;
536 42d9d68e 2022-03-13 thomas }
537 42d9d68e 2022-03-13 thomas 
538 42d9d68e 2022-03-13 thomas static const struct got_error *
539 42d9d68e 2022-03-13 thomas check_file_status(struct got_patch *p, int file_renamed,
540 42d9d68e 2022-03-13 thomas     struct got_worktree *worktree, struct got_repository *repo,
541 42d9d68e 2022-03-13 thomas     struct got_pathlist_head *old, struct got_pathlist_head *new,
542 42d9d68e 2022-03-13 thomas     got_cancel_cb cancel_cb, void *cancel_arg)
543 42d9d68e 2022-03-13 thomas {
544 42d9d68e 2022-03-13 thomas 	static const struct got_error *err;
545 42d9d68e 2022-03-13 thomas 
546 42d9d68e 2022-03-13 thomas 	if (p->old != NULL && p->new == NULL)
547 42d9d68e 2022-03-13 thomas 		return got_worktree_status(worktree, old, repo, 0,
548 42d9d68e 2022-03-13 thomas 		    can_rm, NULL, cancel_cb, cancel_arg);
549 42d9d68e 2022-03-13 thomas 	else if (file_renamed) {
550 42d9d68e 2022-03-13 thomas 		err = got_worktree_status(worktree, old, repo, 0,
551 42d9d68e 2022-03-13 thomas 		    can_rm, NULL, cancel_cb, cancel_arg);
552 42d9d68e 2022-03-13 thomas 		if (err)
553 42d9d68e 2022-03-13 thomas 			return err;
554 42d9d68e 2022-03-13 thomas 		return got_worktree_status(worktree, new, repo, 0,
555 42d9d68e 2022-03-13 thomas 		    can_add, NULL, cancel_cb, cancel_arg);
556 42d9d68e 2022-03-13 thomas 	} else if (p->old == NULL)
557 42d9d68e 2022-03-13 thomas 		return got_worktree_status(worktree, new, repo, 0,
558 42d9d68e 2022-03-13 thomas 		    can_add, NULL, cancel_cb, cancel_arg);
559 42d9d68e 2022-03-13 thomas 	else
560 42d9d68e 2022-03-13 thomas 		return got_worktree_status(worktree, new, repo, 0,
561 42d9d68e 2022-03-13 thomas 		    can_edit, NULL, cancel_cb, cancel_arg);
562 42d9d68e 2022-03-13 thomas }
563 42d9d68e 2022-03-13 thomas 
564 42d9d68e 2022-03-13 thomas static const struct got_error *
565 bb2ad8ff 2022-03-13 thomas apply_patch(struct got_worktree *worktree, struct got_repository *repo,
566 bb2ad8ff 2022-03-13 thomas     struct got_patch *p, got_worktree_delete_cb delete_cb, void *delete_arg,
567 42d9d68e 2022-03-13 thomas     got_worktree_checkout_cb add_cb, void *add_arg, got_cancel_cb cancel_cb,
568 42d9d68e 2022-03-13 thomas     void *cancel_arg)
569 bb2ad8ff 2022-03-13 thomas {
570 bb2ad8ff 2022-03-13 thomas 	const struct got_error *err = NULL;
571 42d9d68e 2022-03-13 thomas 	struct got_pathlist_head oldpaths, newpaths;
572 bb2ad8ff 2022-03-13 thomas 	int file_renamed = 0;
573 bb2ad8ff 2022-03-13 thomas 	char *oldpath = NULL, *newpath = NULL;
574 bb2ad8ff 2022-03-13 thomas 	char *tmppath = NULL, *template = NULL;
575 bb2ad8ff 2022-03-13 thomas 	FILE *tmp = NULL;
576 bb2ad8ff 2022-03-13 thomas 
577 42d9d68e 2022-03-13 thomas 	TAILQ_INIT(&oldpaths);
578 42d9d68e 2022-03-13 thomas 	TAILQ_INIT(&newpaths);
579 42d9d68e 2022-03-13 thomas 
580 42d9d68e 2022-03-13 thomas 	err = build_pathlist(p->old != NULL ? p->old : p->new, &oldpath,
581 42d9d68e 2022-03-13 thomas 	    &oldpaths, worktree);
582 bb2ad8ff 2022-03-13 thomas 	if (err)
583 bb2ad8ff 2022-03-13 thomas 		goto done;
584 bb2ad8ff 2022-03-13 thomas 
585 42d9d68e 2022-03-13 thomas 	err = build_pathlist(p->new != NULL ? p->new : p->old, &newpath,
586 42d9d68e 2022-03-13 thomas 	    &newpaths, worktree);
587 bb2ad8ff 2022-03-13 thomas 	if (err)
588 bb2ad8ff 2022-03-13 thomas 		goto done;
589 bb2ad8ff 2022-03-13 thomas 
590 42d9d68e 2022-03-13 thomas 	if (p->old != NULL && p->new != NULL && strcmp(p->old, p->new))
591 42d9d68e 2022-03-13 thomas 		file_renamed = 1;
592 42d9d68e 2022-03-13 thomas 
593 42d9d68e 2022-03-13 thomas 	err = check_file_status(p, file_renamed, worktree, repo, &oldpaths,
594 42d9d68e 2022-03-13 thomas 	    &newpaths, cancel_cb, cancel_arg);
595 42d9d68e 2022-03-13 thomas 	if (err)
596 42d9d68e 2022-03-13 thomas 		goto done;
597 42d9d68e 2022-03-13 thomas 
598 bb2ad8ff 2022-03-13 thomas 	if (asprintf(&template, "%s/got-patch",
599 bb2ad8ff 2022-03-13 thomas 	    got_worktree_get_root_path(worktree)) == -1) {
600 bb2ad8ff 2022-03-13 thomas 		err = got_error_from_errno(template);
601 069bbb86 2022-03-07 thomas 		goto done;
602 069bbb86 2022-03-07 thomas 	}
603 069bbb86 2022-03-07 thomas 
604 bb2ad8ff 2022-03-13 thomas 	err = got_opentemp_named(&tmppath, &tmp, template);
605 bb2ad8ff 2022-03-13 thomas 	if (err)
606 bb2ad8ff 2022-03-13 thomas 		goto done;
607 bb2ad8ff 2022-03-13 thomas 	err = patch_file(p, oldpath, tmp);
608 bb2ad8ff 2022-03-13 thomas 	if (err)
609 bb2ad8ff 2022-03-13 thomas 		goto done;
610 bb2ad8ff 2022-03-13 thomas 
611 7dd42450 2022-03-13 thomas 	if (p->old != NULL && p->new == NULL) {
612 7dd42450 2022-03-13 thomas 		err = got_worktree_schedule_delete(worktree, &oldpaths,
613 7dd42450 2022-03-13 thomas 		    0, NULL, delete_cb, delete_arg, repo, 0, 0);
614 7dd42450 2022-03-13 thomas 		goto done;
615 7dd42450 2022-03-13 thomas 	}
616 7dd42450 2022-03-13 thomas 
617 bb2ad8ff 2022-03-13 thomas 	if (rename(tmppath, newpath) == -1) {
618 bb2ad8ff 2022-03-13 thomas 		err = got_error_from_errno3("rename", tmppath, newpath);
619 bb2ad8ff 2022-03-13 thomas 		goto done;
620 bb2ad8ff 2022-03-13 thomas 	}
621 bb2ad8ff 2022-03-13 thomas 
622 bb2ad8ff 2022-03-13 thomas 	if (file_renamed) {
623 42d9d68e 2022-03-13 thomas 		err = got_worktree_schedule_delete(worktree, &oldpaths,
624 42d9d68e 2022-03-13 thomas 		    0, NULL, delete_cb, delete_arg, repo, 0, 0);
625 bb2ad8ff 2022-03-13 thomas 		if (err == NULL)
626 42d9d68e 2022-03-13 thomas 			err = got_worktree_schedule_add(worktree, &newpaths,
627 42d9d68e 2022-03-13 thomas 			    add_cb, add_arg, repo, 1);
628 bb2ad8ff 2022-03-13 thomas 	} else if (p->old == NULL)
629 42d9d68e 2022-03-13 thomas 		err = got_worktree_schedule_add(worktree, &newpaths,
630 42d9d68e 2022-03-13 thomas 		    add_cb, add_arg, repo, 1);
631 069bbb86 2022-03-07 thomas 	else
632 bb2ad8ff 2022-03-13 thomas 		printf("M  %s\n", oldpath); /* XXX */
633 bb2ad8ff 2022-03-13 thomas 
634 069bbb86 2022-03-07 thomas done:
635 42d9d68e 2022-03-13 thomas 	if (err != NULL && newpath != NULL && (file_renamed || p->old == NULL))
636 bb2ad8ff 2022-03-13 thomas 		unlink(newpath);
637 94af5a06 2022-03-08 thomas 	free(template);
638 069bbb86 2022-03-07 thomas 	if (tmppath != NULL)
639 069bbb86 2022-03-07 thomas 		unlink(tmppath);
640 069bbb86 2022-03-07 thomas 	free(tmppath);
641 42d9d68e 2022-03-13 thomas 	got_pathlist_free(&oldpaths);
642 42d9d68e 2022-03-13 thomas 	got_pathlist_free(&newpaths);
643 bb2ad8ff 2022-03-13 thomas 	free(oldpath);
644 bb2ad8ff 2022-03-13 thomas 	free(newpath);
645 069bbb86 2022-03-07 thomas 	return err;
646 069bbb86 2022-03-07 thomas }
647 069bbb86 2022-03-07 thomas 
648 069bbb86 2022-03-07 thomas const struct got_error *
649 069bbb86 2022-03-07 thomas got_patch(int fd, struct got_worktree *worktree, struct got_repository *repo,
650 de3c84b6 2022-03-08 thomas     got_worktree_delete_cb delete_cb, void *delete_arg,
651 42d9d68e 2022-03-13 thomas     got_worktree_checkout_cb add_cb, void *add_arg, got_cancel_cb cancel_cb,
652 42d9d68e 2022-03-13 thomas     void *cancel_arg)
653 069bbb86 2022-03-07 thomas {
654 069bbb86 2022-03-07 thomas 	const struct got_error *err = NULL;
655 069bbb86 2022-03-07 thomas 	struct imsgbuf *ibuf;
656 069bbb86 2022-03-07 thomas 	int imsg_fds[2] = {-1, -1};
657 069bbb86 2022-03-07 thomas 	int done = 0;
658 069bbb86 2022-03-07 thomas 	pid_t pid;
659 069bbb86 2022-03-07 thomas 
660 069bbb86 2022-03-07 thomas 	ibuf = calloc(1, sizeof(*ibuf));
661 069bbb86 2022-03-07 thomas 	if (ibuf == NULL) {
662 069bbb86 2022-03-07 thomas 		err = got_error_from_errno("calloc");
663 069bbb86 2022-03-07 thomas 		goto done;
664 069bbb86 2022-03-07 thomas 	}
665 069bbb86 2022-03-07 thomas 
666 069bbb86 2022-03-07 thomas 	if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, imsg_fds) == -1) {
667 069bbb86 2022-03-07 thomas 		err = got_error_from_errno("socketpair");
668 069bbb86 2022-03-07 thomas 		goto done;
669 069bbb86 2022-03-07 thomas 	}
670 069bbb86 2022-03-07 thomas 
671 069bbb86 2022-03-07 thomas 	pid = fork();
672 069bbb86 2022-03-07 thomas 	if (pid == -1) {
673 069bbb86 2022-03-07 thomas 		err = got_error_from_errno("fork");
674 069bbb86 2022-03-07 thomas 		goto done;
675 069bbb86 2022-03-07 thomas 	} else if (pid == 0) {
676 069bbb86 2022-03-07 thomas 		got_privsep_exec_child(imsg_fds, GOT_PATH_PROG_READ_PATCH,
677 069bbb86 2022-03-07 thomas 		    NULL);
678 069bbb86 2022-03-07 thomas 		/* not reached */
679 069bbb86 2022-03-07 thomas 	}
680 069bbb86 2022-03-07 thomas 
681 069bbb86 2022-03-07 thomas 	if (close(imsg_fds[1]) == -1) {
682 069bbb86 2022-03-07 thomas 		err = got_error_from_errno("close");
683 069bbb86 2022-03-07 thomas 		goto done;
684 069bbb86 2022-03-07 thomas 	}
685 069bbb86 2022-03-07 thomas 	imsg_fds[1] = -1;
686 069bbb86 2022-03-07 thomas 	imsg_init(ibuf, imsg_fds[0]);
687 069bbb86 2022-03-07 thomas 
688 069bbb86 2022-03-07 thomas 	err = send_patch(ibuf, fd);
689 069bbb86 2022-03-07 thomas 	fd = -1;
690 069bbb86 2022-03-07 thomas 	if (err)
691 069bbb86 2022-03-07 thomas 		goto done;
692 069bbb86 2022-03-07 thomas 
693 069bbb86 2022-03-07 thomas 	while (!done && err == NULL) {
694 069bbb86 2022-03-07 thomas 		struct got_patch p;
695 069bbb86 2022-03-07 thomas 
696 069bbb86 2022-03-07 thomas 		err = recv_patch(ibuf, &done, &p);
697 069bbb86 2022-03-07 thomas 		if (err || done)
698 069bbb86 2022-03-07 thomas 			break;
699 069bbb86 2022-03-07 thomas 
700 de3c84b6 2022-03-08 thomas 		err = apply_patch(worktree, repo, &p, delete_cb, delete_arg,
701 42d9d68e 2022-03-13 thomas 		    add_cb, add_arg, cancel_cb, cancel_arg);
702 069bbb86 2022-03-07 thomas 		patch_free(&p);
703 069bbb86 2022-03-07 thomas 		if (err)
704 069bbb86 2022-03-07 thomas 			break;
705 069bbb86 2022-03-07 thomas 	}
706 069bbb86 2022-03-07 thomas 
707 069bbb86 2022-03-07 thomas done:
708 069bbb86 2022-03-07 thomas 	if (fd != -1 && close(fd) == -1 && err == NULL)
709 069bbb86 2022-03-07 thomas 		err = got_error_from_errno("close");
710 069bbb86 2022-03-07 thomas 	if (ibuf != NULL)
711 069bbb86 2022-03-07 thomas 		imsg_clear(ibuf);
712 069bbb86 2022-03-07 thomas 	if (imsg_fds[0] != -1 && close(imsg_fds[0]) == -1 && err == NULL)
713 069bbb86 2022-03-07 thomas 		err = got_error_from_errno("close");
714 069bbb86 2022-03-07 thomas 	if (imsg_fds[1] != -1 && close(imsg_fds[1]) == -1 && err == NULL)
715 069bbb86 2022-03-07 thomas 		err = got_error_from_errno("close");
716 069bbb86 2022-03-07 thomas 	return err;
717 069bbb86 2022-03-07 thomas }