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patch: don't trash permissions of patched file

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This commit is contained in:
Denis Vlasenko 2008-03-18 01:38:04 +00:00
parent d7e6af2dda
commit 2a7a451391
1 changed files with 7 additions and 10 deletions
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17
editors/patch.c
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@ -71,12 +71,6 @@ static char *extract_filename(char *line, int patch_level)
return xstrdup(filename_start_ptr);
}
static int file_doesnt_exist(const char *filename)
{
struct stat statbuf;
return stat(filename, &statbuf);
}
int patch_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int patch_main(int argc ATTRIBUTE_UNUSED, char **argv)
{
@ -84,7 +78,8 @@ int patch_main(int argc ATTRIBUTE_UNUSED, char **argv)
char *patch_line;
int ret;
FILE *patch_file = NULL;
struct stat saved_stat;
{
char *p, *i;
ret = getopt32(argv, "p:i:", &p, &i);
@ -134,8 +129,9 @@ int patch_main(int argc ATTRIBUTE_UNUSED, char **argv)
}
new_filename = extract_filename(patch_line, patch_level);
free(patch_line);
if (file_doesnt_exist(new_filename)) {
/* Get access rights from the file to be patched, -1 file does not exist */
if (stat(new_filename, &saved_stat)) {
char *line_ptr;
/* Create leading directories */
line_ptr = strrchr(new_filename, '/');
@ -152,9 +148,10 @@ int patch_main(int argc ATTRIBUTE_UNUSED, char **argv)
strcat(backup_filename, ".orig");
xrename(new_filename, backup_filename);
dst_stream = xfopen(new_filename, "w");
fchmod(fileno(dst_stream), saved_stat.st_mode);
}
if ((backup_filename == NULL) || file_doesnt_exist(original_filename)) {
if ((backup_filename == NULL) || stat(original_filename, &saved_stat)) {
src_stream = NULL;
} else {
if (strcmp(original_filename, new_filename) == 0) {