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Make cp and mv optionally preserve hard links.

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This commit is contained in:
Matt Kraai
2001-12-17 15:26:36 +00:00
parent 46ea0e4696
commit ace02dc9cd
6 changed files with 42 additions and 75 deletions
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24
libbb/copy_file.c
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@@ -30,7 +30,7 @@
#include <stdlib.h>
#include <string.h>
#include "libbb.h"
#include "busybox.h"
int copy_file(const char *source, const char *dest, int flags)
{
@@ -131,6 +131,19 @@ int copy_file(const char *source, const char *dest, int flags)
}
} else if (S_ISREG(source_stat.st_mode)) {
FILE *sfp, *dfp=NULL;
#ifdef CONFIG_FEATURE_PRESERVE_HARDLINKS
char *link_name;
if (!(flags & FILEUTILS_DEREFERENCE) &&
is_in_ino_dev_hashtable(&source_stat, &link_name)) {
if (link(link_name, dest) < 0) {
perror_msg("unable to link `%s'", dest);
return -1;
}
return 0;
}
#endif
if ((sfp = fopen(source, "r")) == NULL) {
perror_msg("unable to open `%s'", source);
@@ -212,12 +225,21 @@ int copy_file(const char *source, const char *dest, int flags)
if (lchown(dest, source_stat.st_uid, source_stat.st_gid) < 0)
perror_msg("unable to preserve ownership of `%s'", dest);
#endif
#ifdef CONFIG_FEATURE_PRESERVE_HARDLINKS
add_to_ino_dev_hashtable(&source_stat, dest);
#endif
return 0;
} else {
error_msg("internal error: unrecognized file type");
return -1;
}
#ifdef CONFIG_FEATURE_PRESERVE_HARDLINKS
add_to_ino_dev_hashtable(&source_stat, dest);
#endif
end:
if (flags & FILEUTILS_PRESERVE_STATUS) {