enum {
OPT_R = (1 << 2),
OPT_N = (1 << 3),
+ OPT_dry_run = (1 << 4) * 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"
+ "dry-run\0" No_argument "\xff"
+ ;
+ applet_long_options = patch_longopts;
+#endif
opt = getopt32(argv, "p:i:RN", &p, &i);
if (opt & OPT_R)
plus = '-';
FILE *dst_stream;
//char *old_filename;
char *new_filename;
- char *backup_filename;
+ char *backup_filename = NULL;
unsigned src_cur_line = 1;
unsigned dst_cur_line = 0;
unsigned dst_beg_line;
bb_make_directory(new_filename, -1, FILEUTILS_RECUR);
*slash = '/';
}
- backup_filename = NULL;
src_stream = NULL;
saved_stat.st_mode = 0644;
- } else {
+ } 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);
}
- dst_stream = xfopen_for_write(new_filename);
- fchmod(fileno(dst_stream), saved_stat.st_mode);
printf("patching file %s\n", new_filename);
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 != ' ')
) {
if (backup_filename) {
unlink(backup_filename);
}
- if ((dst_cur_line == 0) || (dst_beg_line == 0)) {
+ 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 */