-/* vi: set sw=4 ts=4: */
-/*
- * busybox patch applet to handle the unified diff format.
- * Copyright (C) 2003 Glenn McGrath
+/* Adapted from toybox's patch. */
+
+/* vi: set sw=4 ts=4:
+ *
+ * patch.c - Apply a "universal" diff.
*
- * Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
+ * Copyright 2007 Rob Landley <rob@landley.net>
*
- * This applet is written to work with patches generated by GNU diff,
- * where there is equivalent functionality busybox patch shall behave
- * as per GNU patch.
+ * see http://www.opengroup.org/onlinepubs/009695399/utilities/patch.html
+ * (But only does -u, because who still cares about "ed"?)
*
- * There is a SUSv3 specification for patch, however it looks to be
- * incomplete, it doesnt even mention unified diff format.
- * http://www.opengroup.org/onlinepubs/007904975/utilities/patch.html
+ * TODO:
+ * -b backup
+ * -l treat all whitespace as a single space
+ * -N ignore already applied
+ * -d chdir first
+ * -D define wrap #ifdef and #ifndef around changes
+ * -o outfile output here instead of in place
+ * -r rejectfile write rejected hunks to this file
*
- * Issues
- * - Non-interactive
- * - Patches must apply cleanly or patch (not just one hunk) will fail.
- * - Reject file isnt saved
- */
+ * -E remove empty files --remove-empty-files
+ * -f force (no questions asked)
+ * -F fuzz (number, default 2)
+ * [file] which file to patch
+
+USE_PATCH(NEWTOY(patch, USE_TOYBOX_DEBUG("x")"up#i:R", TOYFLAG_USR|TOYFLAG_BIN))
+
+config PATCH
+ bool "patch"
+ default y
+ help
+ usage: patch [-i file] [-p depth] [-Ru]
+
+ Apply a unified diff to one or more files.
+ -i Input file (defaults=stdin)
+ -p number of '/' to strip from start of file paths (default=all)
+ -R Reverse patch.
+ -u Ignored (only handles "unified" diffs)
+
+ This version of patch only handles unified diffs, and only modifies
+ a file when all all hunks to that file apply. Patch prints failed
+ hunks to stderr, and exits with nonzero status if any hunks fail.
+
+ A file compared against /dev/null (or with a date <= the epoch) is
+ created/deleted as appropriate.
+*/
#include "libbb.h"
-static unsigned copy_lines(FILE *src_stream, FILE *dst_stream, unsigned lines_count)
+struct double_list {
+ struct double_list *next;
+ struct double_list *prev;
+ char *data;
+};
+
+// Return the first item from the list, advancing the list (which must be called
+// as &list)
+static
+void *TOY_llist_pop(void *list)
{
- while (src_stream && lines_count) {
- char *line;
- line = xmalloc_fgets(src_stream);
- if (line == NULL) {
- break;
- }
- if (fputs(line, dst_stream) == EOF) {
- bb_perror_msg_and_die("error writing to new file");
+ // I'd use a void ** for the argument, and even accept the typecast in all
+ // callers as documentation you need the &, except the stupid compiler
+ // would then scream about type-punned pointers. Screw it.
+ void **llist = (void **)list;
+ void **next = (void **)*llist;
+ *llist = *next;
+
+ return (void *)next;
+}
+
+// Free all the elements of a linked list
+// if freeit!=NULL call freeit() on each element before freeing it.
+static
+void TOY_llist_free(void *list, void (*freeit)(void *data))
+{
+ while (list) {
+ void *pop = TOY_llist_pop(&list);
+ if (freeit) freeit(pop);
+ else free(pop);
+
+ // End doubly linked list too.
+ if (list==pop) break;
+ }
+}
+
+// Add an entry to the end off a doubly linked list
+static
+struct double_list *dlist_add(struct double_list **list, char *data)
+{
+ struct double_list *line = xmalloc(sizeof(struct double_list));
+
+ line->data = data;
+ if (*list) {
+ line->next = *list;
+ line->prev = (*list)->prev;
+ (*list)->prev->next = line;
+ (*list)->prev = line;
+ } else *list = line->next = line->prev = line;
+
+ return line;
+}
+
+// Ensure entire path exists.
+// If mode != -1 set permissions on newly created dirs.
+// Requires that path string be writable (for temporary null terminators).
+static
+void xmkpath(char *path, int mode)
+{
+ char *p, old;
+ mode_t mask;
+ int rc;
+ struct stat st;
+
+ for (p = path; ; p++) {
+ if (!*p || *p == '/') {
+ old = *p;
+ *p = rc = 0;
+ if (stat(path, &st) || !S_ISDIR(st.st_mode)) {
+ if (mode != -1) {
+ mask = umask(0);
+ rc = mkdir(path, mode);
+ umask(mask);
+ } else rc = mkdir(path, 0777);
+ }
+ *p = old;
+ if(rc) bb_perror_msg_and_die("mkpath '%s'", path);
}
- free(line);
- lines_count--;
+ if (!*p) break;
+ }
+}
+
+// Slow, but small.
+static
+char *get_rawline(int fd, long *plen, char end)
+{
+ char c, *buf = NULL;
+ long len = 0;
+
+ for (;;) {
+ if (1>read(fd, &c, 1)) break;
+ if (!(len & 63)) buf=xrealloc(buf, len+65);
+ if ((buf[len++]=c) == end) break;
+ }
+ if (buf) buf[len]=0;
+ if (plen) *plen = len;
+
+ return buf;
+}
+
+static
+char *get_line(int fd)
+{
+ long len;
+ char *buf = get_rawline(fd, &len, '\n');
+
+ if (buf && buf[--len]=='\n') buf[len]=0;
+
+ return buf;
+}
+
+// Copy the rest of in to out and close both files.
+static
+void xsendfile(int in, int out)
+{
+ long len;
+ char buf[4096];
+
+ if (in<0) return;
+ for (;;) {
+ len = safe_read(in, buf, 4096);
+ if (len<1) break;
+ xwrite(out, buf, len);
+ }
+}
+
+// Copy the rest of the data and replace the original with the copy.
+static
+void replace_tempfile(int fdin, int fdout, char **tempname)
+{
+ char *temp = xstrdup(*tempname);
+
+ temp[strlen(temp)-6]=0;
+ if (fdin != -1) {
+ xsendfile(fdin, fdout);
+ xclose(fdin);
}
- return lines_count;
+ xclose(fdout);
+ rename(*tempname, temp);
+ free(*tempname);
+ free(temp);
+ *tempname = NULL;
+}
+
+// Open a temporary file to copy an existing file into.
+static
+int copy_tempfile(int fdin, char *name, char **tempname)
+{
+ struct stat statbuf;
+ int fd;
+
+ *tempname = xasprintf("%sXXXXXX", name);
+ fd = mkstemp(*tempname);
+ if(-1 == fd) bb_perror_msg_and_die("no temp file");
+
+ // Set permissions of output file
+ fstat(fdin, &statbuf);
+ fchmod(fd, statbuf.st_mode);
+
+ return fd;
+}
+
+// Abort the copy and delete the temporary file.
+static
+void delete_tempfile(int fdin, int fdout, char **tempname)
+{
+ close(fdin);
+ close(fdout);
+ unlink(*tempname);
+ free(*tempname);
+ *tempname = NULL;
+}
+
+
+
+struct globals {
+ char *infile;
+ long prefix;
+
+ struct double_list *current_hunk;
+ long oldline, oldlen, newline, newlen, linenum;
+ int context, state, filein, fileout, filepatch, hunknum;
+ char *tempname;
+
+ // was toys.foo:
+ int exitval;
+};
+#define TT (*ptr_to_globals)
+#define INIT_TT() do { \
+ SET_PTR_TO_GLOBALS(xzalloc(sizeof(TT))); \
+} while (0)
+
+
+//bbox had: "p:i:RN"
+#define FLAG_STR "Rup:i:x"
+/* FLAG_REVERSE must be == 1! Code uses this fact. */
+#define FLAG_REVERSE (1 << 0)
+#define FLAG_u (1 << 1)
+#define FLAG_PATHLEN (1 << 2)
+#define FLAG_INPUT (1 << 3)
+//non-standard:
+#define FLAG_DEBUG (1 << 4)
+
+// Dispose of a line of input, either by writing it out or discarding it.
+
+// state < 2: just free
+// state = 2: write whole line to stderr
+// state = 3: write whole line to fileout
+// state > 3: write line+1 to fileout when *line != state
+
+#define PATCH_DEBUG (option_mask32 & FLAG_DEBUG)
+
+static void do_line(void *data)
+{
+ struct double_list *dlist = (struct double_list *)data;
+
+ if (TT.state>1 && *dlist->data != TT.state)
+ fdprintf(TT.state == 2 ? 2 : TT.fileout,
+ "%s\n", dlist->data+(TT.state>3 ? 1 : 0));
+
+ if (PATCH_DEBUG) fdprintf(2, "DO %d: %s\n", TT.state, dlist->data);
+
+ free(dlist->data);
+ free(data);
+}
+
+static void finish_oldfile(void)
+{
+ if (TT.tempname) replace_tempfile(TT.filein, TT.fileout, &TT.tempname);
+ TT.fileout = TT.filein = -1;
}
-/* If patch_level is -1 it will remove all directory names
- * char *line must be greater than 4 chars
- * returns NULL if the file doesnt exist or error
- * returns malloc'ed filename
- * NB: frees 1st argument!
- */
-static char *extract_filename(char *line, int patch_level, const char *pat)
+static void fail_hunk(void)
{
- char *temp = NULL, *filename_start_ptr = line + 4;
-
- if (strncmp(line, pat, 4) == 0) {
- /* Terminate string at end of source filename */
- line[strcspn(line, "\t\n\r")] = '\0';
-
- /* Skip over (patch_level) number of leading directories */
- while (patch_level--) {
- temp = strchr(filename_start_ptr, '/');
- if (!temp)
- break;
- filename_start_ptr = temp + 1;
+ if (!TT.current_hunk) return;
+ TT.current_hunk->prev->next = 0;
+
+ fdprintf(2, "Hunk %d FAILED %ld/%ld.\n", TT.hunknum, TT.oldline, TT.newline);
+ TT.exitval = 1;
+
+ // If we got to this point, we've seeked to the end. Discard changes to
+ // this file and advance to next file.
+
+ TT.state = 2;
+ TOY_llist_free(TT.current_hunk, do_line);
+ TT.current_hunk = NULL;
+ delete_tempfile(TT.filein, TT.fileout, &TT.tempname);
+ TT.state = 0;
+}
+
+// Given a hunk of a unified diff, make the appropriate change to the file.
+// This does not use the location information, but instead treats a hunk
+// as a sort of regex. Copies data from input to output until it finds
+// the change to be made, then outputs the changed data and returns.
+// (Finding EOF first is an error.) This is a single pass operation, so
+// multiple hunks must occur in order in the file.
+
+static int apply_one_hunk(void)
+{
+ struct double_list *plist, *buf = NULL, *check;
+ int matcheof = 0, reverse = option_mask32 & FLAG_REVERSE, backwarn = 0;
+
+ // Break doubly linked list so we can use singly linked traversal function.
+ TT.current_hunk->prev->next = NULL;
+
+ // Match EOF if there aren't as many ending context lines as beginning
+ for (plist = TT.current_hunk; plist; plist = plist->next) {
+ if (plist->data[0]==' ') matcheof++;
+ else matcheof = 0;
+ if (PATCH_DEBUG) fdprintf(2, "HUNK:%s\n", plist->data);
+ }
+ matcheof = matcheof < TT.context;
+
+ if (PATCH_DEBUG) fdprintf(2,"MATCHEOF=%c\n", matcheof ? 'Y' : 'N');
+
+ // Loop through input data searching for this hunk. Match all context
+ // lines and all lines to be removed until we've found the end of a
+ // complete hunk.
+ plist = TT.current_hunk;
+ buf = NULL;
+ if (TT.context) for (;;) {
+ char *data = get_line(TT.filein);
+
+ TT.linenum++;
+
+ // Figure out which line of hunk to compare with next. (Skip lines
+ // of the hunk we'd be adding.)
+ while (plist && *plist->data == "+-"[reverse]) {
+ if (data && !strcmp(data, plist->data+1)) {
+ if (!backwarn) {
+ fdprintf(2,"Possibly reversed hunk %d at %ld\n",
+ TT.hunknum, TT.linenum);
+ backwarn++;
+ }
+ }
+ plist = plist->next;
}
- temp = xstrdup(filename_start_ptr);
+
+ // Is this EOF?
+ if (!data) {
+ if (PATCH_DEBUG) fdprintf(2, "INEOF\n");
+
+ // Does this hunk need to match EOF?
+ if (!plist && matcheof) break;
+
+ // File ended before we found a place for this hunk.
+ fail_hunk();
+ goto done;
+ } else if (PATCH_DEBUG) fdprintf(2, "IN: %s\n", data);
+ check = dlist_add(&buf, data);
+
+ // Compare this line with next expected line of hunk.
+ // todo: teach the strcmp() to ignore whitespace.
+
+ // A match can fail because the next line doesn't match, or because
+ // we hit the end of a hunk that needed EOF, and this isn't EOF.
+
+ // If match failed, flush first line of buffered data and
+ // recheck buffered data for a new match until we find one or run
+ // out of buffer.
+
+ for (;;) {
+ if (!plist || strcmp(check->data, plist->data+1)) {
+ // Match failed. Write out first line of buffered data and
+ // recheck remaining buffered data for a new match.
+
+ if (PATCH_DEBUG)
+ fdprintf(2, "NOT: %s\n", plist->data);
+
+ TT.state = 3;
+ check = TOY_llist_pop(&buf);
+ check->prev->next = buf;
+ buf->prev = check->prev;
+ do_line(check);
+ plist = TT.current_hunk;
+
+ // If we've reached the end of the buffer without confirming a
+ // match, read more lines.
+ if (check==buf) {
+ buf = 0;
+ break;
+ }
+ check = buf;
+ } else {
+ if (PATCH_DEBUG)
+ fdprintf(2, "MAYBE: %s\n", plist->data);
+ // This line matches. Advance plist, detect successful match.
+ plist = plist->next;
+ if (!plist && !matcheof) goto out;
+ check = check->next;
+ if (check == buf) break;
+ }
+ }
+ }
+out:
+ // We have a match. Emit changed data.
+ TT.state = "-+"[reverse];
+ TOY_llist_free(TT.current_hunk, do_line);
+ TT.current_hunk = NULL;
+ TT.state = 1;
+done:
+ if (buf) {
+ buf->prev->next = NULL;
+ TOY_llist_free(buf, do_line);
}
- free(line);
- return temp;
+
+ return TT.state;
}
+// Read a patch file and find hunks, opening/creating/deleting files.
+// Call apply_one_hunk() on each hunk.
+
+// state 0: Not in a hunk, look for +++.
+// state 1: Found +++ file indicator, look for @@
+// state 2: In hunk: counting initial context lines
+// state 3: In hunk: getting body
+
int patch_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int patch_main(int argc UNUSED_PARAM, char **argv)
{
- struct stat saved_stat;
- char *patch_line;
- FILE *patch_file;
- int patch_level;
- int ret = 0;
- char plus = '+';
- unsigned opt;
- enum {
- OPT_R = (1 << 2),
- OPT_N = (1 << 3),
- /*OPT_f = (1 << 4), ignored */
- /*OPT_E = (1 << 5), ignored, this is the default */
- /*OPT_g = (1 << 6), ignored */
- OPT_dry_run = (1 << 7) * ENABLE_LONG_OPTS,
- };
-
- xfunc_error_retval = 2;
- {
- const char *p = "-1";
- const char *i = "-"; /* compat */
-#if ENABLE_LONG_OPTS
- static const char patch_longopts[] ALIGN1 =
- "strip\0" Required_argument "p"
- "input\0" Required_argument "i"
- "reverse\0" No_argument "R"
- "forward\0" No_argument "N"
- /* "Assume user knows what [s]he is doing, do not ask any questions": */
- "force\0" No_argument "f" /*ignored*/
-# if ENABLE_DESKTOP
- "remove-empty-files\0" No_argument "E" /*ignored*/
- /* "Controls actions when a file is under RCS or SCCS control,
- * and does not exist or is read-only and matches the default version,
- * or when a file is under ClearCase control and does not exist..."
- * IOW: rather obscure option.
- * But Gentoo's portage does use -g0 */
- "get\0" Required_argument "g" /*ignored*/
-# endif
- "dry-run\0" No_argument "\xfd"
-# if ENABLE_DESKTOP
- "backup-if-mismatch\0" No_argument "\xfe" /*ignored*/
- "no-backup-if-mismatch\0" No_argument "\xff" /*ignored*/
-# endif
- ;
- applet_long_options = patch_longopts;
-#endif
- /* -f,-E,-g are ignored */
- opt = getopt32(argv, "p:i:RN""fEg:", &p, &i, NULL);
- if (opt & OPT_R)
- plus = '-';
- patch_level = xatoi(p); /* can be negative! */
- patch_file = xfopen_stdin(i);
- }
+ int opts;
+ int reverse, state = 0;
+ char *oldname = NULL, *newname = NULL;
+ char *opt_p, *opt_i;
+
+ INIT_TT();
+
+ opts = getopt32(argv, FLAG_STR, &opt_p, &opt_i);
+ reverse = opts & FLAG_REVERSE;
+ TT.prefix = (opts & FLAG_PATHLEN) ? xatoi(opt_p) : 0; // can be negative!
+ if (opts & FLAG_INPUT) TT.filepatch = xopen(opt_i, O_RDONLY);
+ TT.filein = TT.fileout = -1;
- patch_line = xmalloc_fgetline(patch_file);
- while (patch_line) {
- FILE *src_stream;
- FILE *dst_stream;
- //char *old_filename;
- char *new_filename;
- char *backup_filename = NULL;
- unsigned src_cur_line = 1;
- unsigned dst_cur_line = 0;
- unsigned dst_beg_line;
- unsigned bad_hunk_count = 0;
- unsigned hunk_count = 0;
- smallint copy_trailing_lines_flag = 0;
-
- /* Skip everything upto the "---" marker
- * No need to parse the lines "Only in <dir>", and "diff <args>"
- */
- do {
- /* Extract the filename used before the patch was generated */
- new_filename = extract_filename(patch_line, patch_level, "--- ");
- // was old_filename above
- patch_line = xmalloc_fgetline(patch_file);
- if (!patch_line) goto quit;
- } while (!new_filename);
- free(new_filename); // "source" filename is irrelevant
-
- new_filename = extract_filename(patch_line, patch_level, "+++ ");
- if (!new_filename) {
- bb_error_msg_and_die("invalid patch");
+ // Loop through the lines in the patch
+ for(;;) {
+ char *patchline;
+
+ patchline = get_line(TT.filepatch);
+ if (!patchline) break;
+
+ // Other versions of patch accept damaged patches,
+ // so we need to also.
+ if (!*patchline) {
+ free(patchline);
+ patchline = xstrdup(" ");
}
- /* Get access rights from the file to be patched */
- if (stat(new_filename, &saved_stat) != 0) {
- char *slash = strrchr(new_filename, '/');
- if (slash) {
- /* Create leading directories */
- *slash = '\0';
- bb_make_directory(new_filename, -1, FILEUTILS_RECUR);
- *slash = '/';
+ // Are we assembling a hunk?
+ if (state >= 2) {
+ if (*patchline==' ' || *patchline=='+' || *patchline=='-') {
+ dlist_add(&TT.current_hunk, patchline);
+
+ if (*patchline != '+') TT.oldlen--;
+ if (*patchline != '-') TT.newlen--;
+
+ // Context line?
+ if (*patchline==' ' && state==2) TT.context++;
+ else state=3;
+
+ // If we've consumed all expected hunk lines, apply the hunk.
+
+ if (!TT.oldlen && !TT.newlen) state = apply_one_hunk();
+ continue;
}
- src_stream = NULL;
- saved_stat.st_mode = 0644;
- } else if (!(opt & OPT_dry_run)) {
- backup_filename = xasprintf("%s.orig", new_filename);
- xrename(new_filename, backup_filename);
- src_stream = xfopen_for_read(backup_filename);
- } else
- src_stream = xfopen_for_read(new_filename);
-
- if (opt & OPT_dry_run) {
- dst_stream = xfopen_for_write("/dev/null");
- } else {
- dst_stream = xfopen_for_write(new_filename);
- fchmod(fileno(dst_stream), saved_stat.st_mode);
+ fail_hunk();
+ state = 0;
+ continue;
}
- printf("patching file %s\n", new_filename);
-
- /* Handle all hunks for this file */
- patch_line = xmalloc_fgets(patch_file);
- while (patch_line) {
- unsigned count;
- unsigned src_beg_line;
- unsigned hunk_offset_start;
- unsigned src_last_line = 1;
- unsigned dst_last_line = 1;
-
- if ((sscanf(patch_line, "@@ -%d,%d +%d,%d", &src_beg_line, &src_last_line, &dst_beg_line, &dst_last_line) < 3)
- && (sscanf(patch_line, "@@ -%d +%d,%d", &src_beg_line, &dst_beg_line, &dst_last_line) < 2)
- ) {
- /* No more hunks for this file */
- break;
- }
- if (plus != '+') {
- /* reverse patch */
- unsigned tmp = src_last_line;
- src_last_line = dst_last_line;
- dst_last_line = tmp;
- tmp = src_beg_line;
- src_beg_line = dst_beg_line;
- dst_beg_line = tmp;
+ // Open a new file?
+ if (!strncmp("--- ", patchline, 4) || !strncmp("+++ ", patchline, 4)) {
+ char *s, **name = reverse ? &newname : &oldname;
+ int i;
+
+ if (*patchline == '+') {
+ name = reverse ? &oldname : &newname;
+ state = 1;
}
- hunk_count++;
-
- if (src_beg_line && dst_beg_line) {
- /* Copy unmodified lines upto start of hunk */
- /* src_beg_line will be 0 if it's a new file */
- count = src_beg_line - src_cur_line;
- if (copy_lines(src_stream, dst_stream, count)) {
- bb_error_msg_and_die("bad src file");
- }
- src_cur_line += count;
- dst_cur_line += count;
- copy_trailing_lines_flag = 1;
+
+ free(*name);
+ finish_oldfile();
+
+ // Trim date from end of filename (if any). We don't care.
+ for (s = patchline+4; *s && *s!='\t'; s++)
+ if (*s=='\\' && s[1]) s++;
+ i = atoi(s);
+ if (i>1900 && i<=1970)
+ *name = xstrdup("/dev/null");
+ else {
+ *s = 0;
+ *name = xstrdup(patchline+4);
}
- src_last_line += hunk_offset_start = src_cur_line;
- dst_last_line += dst_cur_line;
-
- while (1) {
- free(patch_line);
- patch_line = xmalloc_fgets(patch_file);
- if (patch_line == NULL)
- break; /* EOF */
- if (!*patch_line) {
- /* whitespace-damaged patch with "" lines */
- free(patch_line);
- patch_line = xstrdup(" ");
+
+ // We defer actually opening the file because svn produces broken
+ // patches that don't signal they want to create a new file the
+ // way the patch man page says, so you have to read the first hunk
+ // and _guess_.
+
+ // Start a new hunk?
+ } else if (state == 1 && !strncmp("@@ -", patchline, 4)) {
+ int i;
+
+ i = sscanf(patchline+4, "%ld,%ld +%ld,%ld", &TT.oldline,
+ &TT.oldlen, &TT.newline, &TT.newlen);
+ if (i != 4)
+ bb_error_msg_and_die("corrupt hunk %d at %ld", TT.hunknum, TT.linenum);
+
+ TT.context = 0;
+ state = 2;
+
+ // If this is the first hunk, open the file.
+ if (TT.filein == -1) {
+ int oldsum, newsum, del = 0;
+ char *s, *name;
+
+ oldsum = TT.oldline + TT.oldlen;
+ newsum = TT.newline + TT.newlen;
+
+ name = reverse ? oldname : newname;
+
+ // We're deleting oldname if new file is /dev/null (before -p)
+ // or if new hunk is empty (zero context) after patching
+ if (!strcmp(name, "/dev/null") || !(reverse ? oldsum : newsum))
+ {
+ name = reverse ? newname : oldname;
+ del++;
}
- if ((*patch_line != '-') && (*patch_line != '+')
- && (*patch_line != ' ')
- ) {
- break; /* End of hunk */
+
+ // handle -p path truncation.
+ for (i=0, s = name; *s;) {
+ if ((option_mask32 & FLAG_PATHLEN) && TT.prefix == i) break;
+ if (*(s++)=='/') {
+ name = s;
+ i++;
+ }
}
- if (*patch_line != plus) { /* '-' or ' ' */
- char *src_line = NULL;
- if (src_cur_line == src_last_line)
- break;
- if (src_stream) {
- src_line = xmalloc_fgets(src_stream);
- if (src_line) {
- int diff = strcmp(src_line, patch_line + 1);
- src_cur_line++;
- free(src_line);
- if (diff)
- src_line = NULL;
+
+ if (del) {
+ printf("removing %s\n", name);
+ xunlink(name);
+ state = 0;
+ // If we've got a file to open, do so.
+ } else if (!(option_mask32 & FLAG_PATHLEN) || i <= TT.prefix) {
+ // If the old file was null, we're creating a new one.
+ if (!strcmp(oldname, "/dev/null") || !oldsum) {
+ printf("creating %s\n", name);
+ s = strrchr(name, '/');
+ if (s) {
+ *s = 0;
+ xmkpath(name, -1);
+ *s = '/';
}
+ TT.filein = xopen3(name, O_CREAT|O_EXCL|O_RDWR, 0666);
+ } else {
+ printf("patching file %s\n", name);
+ TT.filein = xopen(name, O_RDWR);
}
- /* Do not patch an already patched hunk with -N */
- if (src_line == 0 && (opt & OPT_N)) {
- continue;
- }
- if (!src_line) {
- bb_error_msg("hunk #%u FAILED at %u", hunk_count, hunk_offset_start);
- bad_hunk_count++;
- break;
- }
- if (*patch_line != ' ') { /* '-' */
- continue;
- }
+ TT.fileout = copy_tempfile(TT.filein, name, &TT.tempname);
+ TT.linenum = 0;
+ TT.hunknum = 0;
}
- if (dst_cur_line == dst_last_line)
- break;
- fputs(patch_line + 1, dst_stream);
- dst_cur_line++;
- } /* end of while loop handling one hunk */
- } /* end of while loop handling one file */
-
- /* Cleanup last patched file */
- if (copy_trailing_lines_flag) {
- copy_lines(src_stream, dst_stream, (unsigned)(-1));
- }
- if (src_stream) {
- fclose(src_stream);
- }
- fclose(dst_stream);
- if (bad_hunk_count) {
- ret = 1;
- bb_error_msg("%u out of %u hunk FAILED", bad_hunk_count, hunk_count);
- } else {
- /* It worked, we can remove the backup */
- if (backup_filename) {
- unlink(backup_filename);
- }
- if (!(opt & OPT_dry_run)
- && ((dst_cur_line == 0) || (dst_beg_line == 0))
- ) {
- /* The new patched file is empty, remove it */
- xunlink(new_filename);
- // /* old_filename and new_filename may be the same file */
- // unlink(old_filename);
}
+
+ TT.hunknum++;
+
+ continue;
}
- free(backup_filename);
- //free(old_filename);
- free(new_filename);
- } /* end of "while there are patch lines" */
- quit:
- /* 0 = SUCCESS
- * 1 = Some hunks failed
- * 2 = More serious problems (exited earlier)
- */
- return ret;
+
+ // If we didn't continue above, discard this line.
+ free(patchline);
+ }
+
+ finish_oldfile();
+
+ if (ENABLE_FEATURE_CLEAN_UP) {
+ close(TT.filepatch);
+ free(oldname);
+ free(newname);
+ }
+
+ return TT.exitval;
}
--- /dev/null
+/* vi: set sw=4 ts=4: */
+/*
+ * busybox patch applet to handle the unified diff format.
+ * Copyright (C) 2003 Glenn McGrath
+ *
+ * Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
+ *
+ * This applet is written to work with patches generated by GNU diff,
+ * where there is equivalent functionality busybox patch shall behave
+ * as per GNU patch.
+ *
+ * There is a SUSv3 specification for patch, however it looks to be
+ * incomplete, it doesnt even mention unified diff format.
+ * http://www.opengroup.org/onlinepubs/007904975/utilities/patch.html
+ *
+ * Issues
+ * - Non-interactive
+ * - Patches must apply cleanly or patch (not just one hunk) will fail.
+ * - Reject file isnt saved
+ */
+
+#include "libbb.h"
+
+static unsigned copy_lines(FILE *src_stream, FILE *dst_stream, unsigned lines_count)
+{
+ while (src_stream && lines_count) {
+ char *line;
+ line = xmalloc_fgets(src_stream);
+ if (line == NULL) {
+ break;
+ }
+ if (fputs(line, dst_stream) == EOF) {
+ bb_perror_msg_and_die("error writing to new file");
+ }
+ free(line);
+ lines_count--;
+ }
+ return lines_count;
+}
+
+/* If patch_level is -1 it will remove all directory names
+ * char *line must be greater than 4 chars
+ * returns NULL if the file doesnt exist or error
+ * returns malloc'ed filename
+ * NB: frees 1st argument!
+ */
+static char *extract_filename(char *line, int patch_level, const char *pat)
+{
+ char *temp = NULL, *filename_start_ptr = line + 4;
+
+ if (strncmp(line, pat, 4) == 0) {
+ /* Terminate string at end of source filename */
+ line[strcspn(line, "\t\n\r")] = '\0';
+
+ /* Skip over (patch_level) number of leading directories */
+ while (patch_level--) {
+ temp = strchr(filename_start_ptr, '/');
+ if (!temp)
+ break;
+ filename_start_ptr = temp + 1;
+ }
+ temp = xstrdup(filename_start_ptr);
+ }
+ free(line);
+ return temp;
+}
+
+int patch_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int patch_main(int argc UNUSED_PARAM, char **argv)
+{
+ struct stat saved_stat;
+ char *patch_line;
+ FILE *patch_file;
+ int patch_level;
+ int ret = 0;
+ char plus = '+';
+ unsigned opt;
+ enum {
+ OPT_R = (1 << 2),
+ OPT_N = (1 << 3),
+ /*OPT_f = (1 << 4), ignored */
+ /*OPT_E = (1 << 5), ignored, this is the default */
+ /*OPT_g = (1 << 6), ignored */
+ OPT_dry_run = (1 << 7) * ENABLE_LONG_OPTS,
+ };
+
+ xfunc_error_retval = 2;
+ {
+ const char *p = "-1";
+ const char *i = "-"; /* compat */
+#if ENABLE_LONG_OPTS
+ static const char patch_longopts[] ALIGN1 =
+ "strip\0" Required_argument "p"
+ "input\0" Required_argument "i"
+ "reverse\0" No_argument "R"
+ "forward\0" No_argument "N"
+ /* "Assume user knows what [s]he is doing, do not ask any questions": */
+ "force\0" No_argument "f" /*ignored*/
+# if ENABLE_DESKTOP
+ "remove-empty-files\0" No_argument "E" /*ignored*/
+ /* "Controls actions when a file is under RCS or SCCS control,
+ * and does not exist or is read-only and matches the default version,
+ * or when a file is under ClearCase control and does not exist..."
+ * IOW: rather obscure option.
+ * But Gentoo's portage does use -g0 */
+ "get\0" Required_argument "g" /*ignored*/
+# endif
+ "dry-run\0" No_argument "\xfd"
+# if ENABLE_DESKTOP
+ "backup-if-mismatch\0" No_argument "\xfe" /*ignored*/
+ "no-backup-if-mismatch\0" No_argument "\xff" /*ignored*/
+# endif
+ ;
+ applet_long_options = patch_longopts;
+#endif
+ /* -f,-E,-g are ignored */
+ opt = getopt32(argv, "p:i:RN""fEg:", &p, &i, NULL);
+ if (opt & OPT_R)
+ plus = '-';
+ patch_level = xatoi(p); /* can be negative! */
+ patch_file = xfopen_stdin(i);
+ }
+
+ patch_line = xmalloc_fgetline(patch_file);
+ while (patch_line) {
+ FILE *src_stream;
+ FILE *dst_stream;
+ //char *old_filename;
+ char *new_filename;
+ char *backup_filename = NULL;
+ unsigned src_cur_line = 1;
+ unsigned dst_cur_line = 0;
+ unsigned dst_beg_line;
+ unsigned bad_hunk_count = 0;
+ unsigned hunk_count = 0;
+ smallint copy_trailing_lines_flag = 0;
+
+ /* Skip everything upto the "---" marker
+ * No need to parse the lines "Only in <dir>", and "diff <args>"
+ */
+ do {
+ /* Extract the filename used before the patch was generated */
+ new_filename = extract_filename(patch_line, patch_level, "--- ");
+ // was old_filename above
+ patch_line = xmalloc_fgetline(patch_file);
+ if (!patch_line) goto quit;
+ } while (!new_filename);
+ free(new_filename); // "source" filename is irrelevant
+
+ new_filename = extract_filename(patch_line, patch_level, "+++ ");
+ if (!new_filename) {
+ bb_error_msg_and_die("invalid patch");
+ }
+
+ /* Get access rights from the file to be patched */
+ if (stat(new_filename, &saved_stat) != 0) {
+ char *slash = strrchr(new_filename, '/');
+ if (slash) {
+ /* Create leading directories */
+ *slash = '\0';
+ bb_make_directory(new_filename, -1, FILEUTILS_RECUR);
+ *slash = '/';
+ }
+ src_stream = NULL;
+ saved_stat.st_mode = 0644;
+ } else if (!(opt & OPT_dry_run)) {
+ backup_filename = xasprintf("%s.orig", new_filename);
+ xrename(new_filename, backup_filename);
+ src_stream = xfopen_for_read(backup_filename);
+ } else
+ src_stream = xfopen_for_read(new_filename);
+
+ if (opt & OPT_dry_run) {
+ dst_stream = xfopen_for_write("/dev/null");
+ } else {
+ dst_stream = xfopen_for_write(new_filename);
+ fchmod(fileno(dst_stream), saved_stat.st_mode);
+ }
+
+ printf("patching file %s\n", new_filename);
+
+ /* Handle all hunks for this file */
+ patch_line = xmalloc_fgets(patch_file);
+ while (patch_line) {
+ unsigned count;
+ unsigned src_beg_line;
+ unsigned hunk_offset_start;
+ unsigned src_last_line = 1;
+ unsigned dst_last_line = 1;
+
+ if ((sscanf(patch_line, "@@ -%d,%d +%d,%d", &src_beg_line, &src_last_line, &dst_beg_line, &dst_last_line) < 3)
+ && (sscanf(patch_line, "@@ -%d +%d,%d", &src_beg_line, &dst_beg_line, &dst_last_line) < 2)
+ ) {
+ /* No more hunks for this file */
+ break;
+ }
+ if (plus != '+') {
+ /* reverse patch */
+ unsigned tmp = src_last_line;
+ src_last_line = dst_last_line;
+ dst_last_line = tmp;
+ tmp = src_beg_line;
+ src_beg_line = dst_beg_line;
+ dst_beg_line = tmp;
+ }
+ hunk_count++;
+
+ if (src_beg_line && dst_beg_line) {
+ /* Copy unmodified lines upto start of hunk */
+ /* src_beg_line will be 0 if it's a new file */
+ count = src_beg_line - src_cur_line;
+ if (copy_lines(src_stream, dst_stream, count)) {
+ bb_error_msg_and_die("bad src file");
+ }
+ src_cur_line += count;
+ dst_cur_line += count;
+ copy_trailing_lines_flag = 1;
+ }
+ src_last_line += hunk_offset_start = src_cur_line;
+ dst_last_line += dst_cur_line;
+
+ while (1) {
+ free(patch_line);
+ patch_line = xmalloc_fgets(patch_file);
+ if (patch_line == NULL)
+ break; /* EOF */
+ if (!*patch_line) {
+ /* whitespace-damaged patch with "" lines */
+ free(patch_line);
+ patch_line = xstrdup(" ");
+ }
+ if ((*patch_line != '-') && (*patch_line != '+')
+ && (*patch_line != ' ')
+ ) {
+ break; /* End of hunk */
+ }
+ if (*patch_line != plus) { /* '-' or ' ' */
+ char *src_line = NULL;
+ if (src_cur_line == src_last_line)
+ break;
+ if (src_stream) {
+ src_line = xmalloc_fgets(src_stream);
+ if (src_line) {
+ int diff = strcmp(src_line, patch_line + 1);
+ src_cur_line++;
+ free(src_line);
+ if (diff)
+ src_line = NULL;
+ }
+ }
+ /* Do not patch an already patched hunk with -N */
+ if (src_line == 0 && (opt & OPT_N)) {
+ continue;
+ }
+ if (!src_line) {
+ bb_error_msg("hunk #%u FAILED at %u", hunk_count, hunk_offset_start);
+ bad_hunk_count++;
+ break;
+ }
+ if (*patch_line != ' ') { /* '-' */
+ continue;
+ }
+ }
+ if (dst_cur_line == dst_last_line)
+ break;
+ fputs(patch_line + 1, dst_stream);
+ dst_cur_line++;
+ } /* end of while loop handling one hunk */
+ } /* end of while loop handling one file */
+
+ /* Cleanup last patched file */
+ if (copy_trailing_lines_flag) {
+ copy_lines(src_stream, dst_stream, (unsigned)(-1));
+ }
+ if (src_stream) {
+ fclose(src_stream);
+ }
+ fclose(dst_stream);
+ if (bad_hunk_count) {
+ ret = 1;
+ bb_error_msg("%u out of %u hunk FAILED", bad_hunk_count, hunk_count);
+ } else {
+ /* It worked, we can remove the backup */
+ if (backup_filename) {
+ unlink(backup_filename);
+ }
+ if (!(opt & OPT_dry_run)
+ && ((dst_cur_line == 0) || (dst_beg_line == 0))
+ ) {
+ /* The new patched file is empty, remove it */
+ xunlink(new_filename);
+ // /* old_filename and new_filename may be the same file */
+ // unlink(old_filename);
+ }
+ }
+ free(backup_filename);
+ //free(old_filename);
+ free(new_filename);
+ } /* end of "while there are patch lines" */
+ quit:
+ /* 0 = SUCCESS
+ * 1 = Some hunks failed
+ * 2 = More serious problems (exited earlier)
+ */
+ return ret;
+}
-/* Adapted from toybox's patch. Currently unused */
+/* Adapted from toybox's patch. */
/* vi: set sw=4 ts=4:
*
* -F fuzz (number, default 2)
* [file] which file to patch
-USE_PATCH(NEWTOY(patch, "up#i:R", TOYFLAG_USR|TOYFLAG_BIN))
+USE_PATCH(NEWTOY(patch, USE_TOYBOX_DEBUG("x")"up#i:R", TOYFLAG_USR|TOYFLAG_BIN))
config PATCH
bool "patch"
struct globals {
- struct double_list *plines;
- long linenum;
- int context;
- int hunknum;
- int filein;
- int fileout;
- int state;
+ char *infile;
+ long prefix;
+
+ struct double_list *current_hunk;
+ long oldline, oldlen, newline, newlen, linenum;
+ int context, state, filein, fileout, filepatch, hunknum;
char *tempname;
- smallint exitval;
+
+ // was toys.foo:
+ int exitval;
};
#define TT (*ptr_to_globals)
#define INIT_TT() do { \
//bbox had: "p:i:RN"
-#define FLAG_STR "Rup:i:"
+#define FLAG_STR "Rup:i:x"
/* FLAG_REVERSE must be == 1! Code uses this fact. */
#define FLAG_REVERSE (1 << 0)
#define FLAG_u (1 << 1)
#define FLAG_PATHLEN (1 << 2)
#define FLAG_INPUT (1 << 3)
+//non-standard:
+#define FLAG_DEBUG (1 << 4)
// Dispose of a line of input, either by writing it out or discarding it.
// state = 3: write whole line to fileout
// state > 3: write line+1 to fileout when *line != state
+#define PATCH_DEBUG (option_mask32 & FLAG_DEBUG)
+
static void do_line(void *data)
{
struct double_list *dlist = (struct double_list *)data;
fdprintf(TT.state == 2 ? 2 : TT.fileout,
"%s\n", dlist->data+(TT.state>3 ? 1 : 0));
+ if (PATCH_DEBUG) fdprintf(2, "DO %d: %s\n", TT.state, dlist->data);
+
free(dlist->data);
free(data);
}
static void fail_hunk(void)
{
- if (!TT.plines) return;
- TT.plines->prev->next = 0;
+ if (!TT.current_hunk) return;
+ TT.current_hunk->prev->next = 0;
- fdprintf(2, "Hunk %d FAILED.\n", TT.hunknum);
+ fdprintf(2, "Hunk %d FAILED %ld/%ld.\n", TT.hunknum, TT.oldline, TT.newline);
TT.exitval = 1;
// If we got to this point, we've seeked to the end. Discard changes to
// this file and advance to next file.
TT.state = 2;
- TOY_llist_free(TT.plines, do_line);
- TT.plines = NULL;
+ TOY_llist_free(TT.current_hunk, do_line);
+ TT.current_hunk = NULL;
delete_tempfile(TT.filein, TT.fileout, &TT.tempname);
TT.state = 0;
}
-static int apply_hunk(void)
+// Given a hunk of a unified diff, make the appropriate change to the file.
+// This does not use the location information, but instead treats a hunk
+// as a sort of regex. Copies data from input to output until it finds
+// the change to be made, then outputs the changed data and returns.
+// (Finding EOF first is an error.) This is a single pass operation, so
+// multiple hunks must occur in order in the file.
+
+static int apply_one_hunk(void)
{
struct double_list *plist, *buf = NULL, *check;
- int i = 0, backwards = 0, matcheof = 0,
- reverse = option_mask32 & FLAG_REVERSE;
+ int matcheof = 0, reverse = option_mask32 & FLAG_REVERSE, backwarn = 0;
// Break doubly linked list so we can use singly linked traversal function.
- TT.plines->prev->next = NULL;
+ TT.current_hunk->prev->next = NULL;
// Match EOF if there aren't as many ending context lines as beginning
- for (plist = TT.plines; plist; plist = plist->next) {
- if (plist->data[0]==' ') i++;
- else i = 0;
+ for (plist = TT.current_hunk; plist; plist = plist->next) {
+ if (plist->data[0]==' ') matcheof++;
+ else matcheof = 0;
+ if (PATCH_DEBUG) fdprintf(2, "HUNK:%s\n", plist->data);
}
- if (i < TT.context) matcheof++;
+ matcheof = matcheof < TT.context;
- // Search for a place to apply this hunk. Match all context lines and
- // lines to be removed.
- plist = TT.plines;
- buf = NULL;
- i = 0;
+ if (PATCH_DEBUG) fdprintf(2,"MATCHEOF=%c\n", matcheof ? 'Y' : 'N');
- // Start of for loop
+ // Loop through input data searching for this hunk. Match all context
+ // lines and all lines to be removed until we've found the end of a
+ // complete hunk.
+ plist = TT.current_hunk;
+ buf = NULL;
if (TT.context) for (;;) {
char *data = get_line(TT.filein);
TT.linenum++;
- // Skip lines of the hunk we'd be adding.
+ // Figure out which line of hunk to compare with next. (Skip lines
+ // of the hunk we'd be adding.)
while (plist && *plist->data == "+-"[reverse]) {
if (data && !strcmp(data, plist->data+1)) {
- if (++backwards == TT.context)
+ if (!backwarn) {
fdprintf(2,"Possibly reversed hunk %d at %ld\n",
TT.hunknum, TT.linenum);
- } else backwards=0;
+ backwarn++;
+ }
+ }
plist = plist->next;
}
// Is this EOF?
if (!data) {
+ if (PATCH_DEBUG) fdprintf(2, "INEOF\n");
+
// Does this hunk need to match EOF?
if (!plist && matcheof) break;
// File ended before we found a place for this hunk.
fail_hunk();
goto done;
- }
+ } else if (PATCH_DEBUG) fdprintf(2, "IN: %s\n", data);
check = dlist_add(&buf, data);
+ // Compare this line with next expected line of hunk.
// todo: teach the strcmp() to ignore whitespace.
- for (;;) {
- // If we hit the end of a hunk that needed EOF and this isn't EOF,
- // or next line doesn't match, flush first line of buffered data and
- // recheck match until we find a new match or run out of buffer.
+ // A match can fail because the next line doesn't match, or because
+ // we hit the end of a hunk that needed EOF, and this isn't EOF.
+
+ // If match failed, flush first line of buffered data and
+ // recheck buffered data for a new match until we find one or run
+ // out of buffer.
+ for (;;) {
if (!plist || strcmp(check->data, plist->data+1)) {
- // First line isn't a match, write it out.
+ // Match failed. Write out first line of buffered data and
+ // recheck remaining buffered data for a new match.
+
+ if (PATCH_DEBUG)
+ fdprintf(2, "NOT: %s\n", plist->data);
+
TT.state = 3;
check = TOY_llist_pop(&buf);
check->prev->next = buf;
buf->prev = check->prev;
do_line(check);
- plist = TT.plines;
+ plist = TT.current_hunk;
- // Out of buffered lines?
+ // If we've reached the end of the buffer without confirming a
+ // match, read more lines.
if (check==buf) {
buf = 0;
break;
}
check = buf;
} else {
+ if (PATCH_DEBUG)
+ fdprintf(2, "MAYBE: %s\n", plist->data);
// This line matches. Advance plist, detect successful match.
plist = plist->next;
if (!plist && !matcheof) goto out;
}
}
out:
- // Got it. Emit changed data.
+ // We have a match. Emit changed data.
TT.state = "-+"[reverse];
- TOY_llist_free(TT.plines, do_line);
- TT.plines = NULL;
+ TOY_llist_free(TT.current_hunk, do_line);
+ TT.current_hunk = NULL;
TT.state = 1;
done:
if (buf) {
return TT.state;
}
+// Read a patch file and find hunks, opening/creating/deleting files.
+// Call apply_one_hunk() on each hunk.
+
// state 0: Not in a hunk, look for +++.
// state 1: Found +++ file indicator, look for @@
// state 2: In hunk: counting initial context lines
int reverse, state = 0;
char *oldname = NULL, *newname = NULL;
char *opt_p, *opt_i;
- int prefix;
-
- long oldline = 0, oldlen = 0, newline = 0, newlen = 0;
INIT_TT();
opts = getopt32(argv, FLAG_STR, &opt_p, &opt_i);
reverse = opts & FLAG_REVERSE;
-
- if (opts & FLAG_INPUT) xmove_fd(xopen(opt_i, O_RDONLY), STDIN_FILENO);
- prefix = (opts & FLAG_PATHLEN) ? xatoi(opt_p) : 0; // can be negative!
+ TT.prefix = (opts & FLAG_PATHLEN) ? xatoi(opt_p) : 0; // can be negative!
+ if (opts & FLAG_INPUT) TT.filepatch = xopen(opt_i, O_RDONLY);
TT.filein = TT.fileout = -1;
// Loop through the lines in the patch
for(;;) {
char *patchline;
- patchline = get_line(STDIN_FILENO);
+ patchline = get_line(TT.filepatch);
if (!patchline) break;
// Other versions of patch accept damaged patches,
// Are we assembling a hunk?
if (state >= 2) {
if (*patchline==' ' || *patchline=='+' || *patchline=='-') {
- dlist_add(&TT.plines, patchline);
+ dlist_add(&TT.current_hunk, patchline);
- if (*patchline != '+') oldlen--;
- if (*patchline != '-') newlen--;
+ if (*patchline != '+') TT.oldlen--;
+ if (*patchline != '-') TT.newlen--;
// Context line?
if (*patchline==' ' && state==2) TT.context++;
else state=3;
// If we've consumed all expected hunk lines, apply the hunk.
- if (!oldlen && !newlen) state = apply_hunk();
+
+ if (!TT.oldlen && !TT.newlen) state = apply_one_hunk();
continue;
}
fail_hunk();
// Open a new file?
if (!strncmp("--- ", patchline, 4) || !strncmp("+++ ", patchline, 4)) {
- char *s, **name = &oldname;
+ char *s, **name = reverse ? &newname : &oldname;
int i;
if (*patchline == '+') {
- name = &newname;
+ name = reverse ? &oldname : &newname;
state = 1;
}
for (s = patchline+4; *s && *s!='\t'; s++)
if (*s=='\\' && s[1]) s++;
i = atoi(s);
- if (i && i<=1970)
+ if (i>1900 && i<=1970)
*name = xstrdup("/dev/null");
else {
*s = 0;
} else if (state == 1 && !strncmp("@@ -", patchline, 4)) {
int i;
- i = sscanf(patchline+4, "%ld,%ld +%ld,%ld",
- &oldline, &oldlen, &newline, &newlen);
+ i = sscanf(patchline+4, "%ld,%ld +%ld,%ld", &TT.oldline,
+ &TT.oldlen, &TT.newline, &TT.newlen);
if (i != 4)
bb_error_msg_and_die("corrupt hunk %d at %ld", TT.hunknum, TT.linenum);
int oldsum, newsum, del = 0;
char *s, *name;
- oldsum = oldline + oldlen;
- newsum = newline + newlen;
+ oldsum = TT.oldline + TT.oldlen;
+ newsum = TT.newline + TT.newlen;
name = reverse ? oldname : newname;
// We're deleting oldname if new file is /dev/null (before -p)
// or if new hunk is empty (zero context) after patching
- if (!strcmp(name, "/dev/null") || !(reverse ? oldsum : newsum)) {
+ if (!strcmp(name, "/dev/null") || !(reverse ? oldsum : newsum))
+ {
name = reverse ? newname : oldname;
del++;
}
// handle -p path truncation.
for (i=0, s = name; *s;) {
- if ((option_mask32 & FLAG_PATHLEN) && prefix == i)
- break;
+ if ((option_mask32 & FLAG_PATHLEN) && TT.prefix == i) break;
if (*(s++)=='/') {
name = s;
i++;
xunlink(name);
state = 0;
// If we've got a file to open, do so.
- } else if (!(option_mask32 & FLAG_PATHLEN) || i <= prefix) {
+ } else if (!(option_mask32 & FLAG_PATHLEN) || i <= TT.prefix) {
// If the old file was null, we're creating a new one.
if (!strcmp(oldname, "/dev/null") || !oldsum) {
printf("creating %s\n", name);
finish_oldfile();
if (ENABLE_FEATURE_CLEAN_UP) {
+ close(TT.filepatch);
free(oldname);
free(newname);
}
projects / oweals / busybox.git / commitdiff