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| author | Matt Kraai | 2001-12-17 15:26:36 +0000 |
|---|---|---|
| committer | Matt Kraai | 2001-12-17 15:26:36 +0000 |
| commit | ace02dc9cd3ca0c95db5b5ebe87b9d6cd6ca1733 (patch) | |
| tree | 1dec04901febc0fd63ac5b92bc2cca4333689477 /libbb | |
| parent | 46ea0e4696456061ad7ce799658f737c24f781a6 (diff) | |
| download | busybox-ace02dc9cd3ca0c95db5b5ebe87b9d6cd6ca1733.zip busybox-ace02dc9cd3ca0c95db5b5ebe87b9d6cd6ca1733.tar.gz | |
Make cp and mv optionally preserve hard links.
Diffstat (limited to 'libbb')
| -rw-r--r-- | libbb/Makefile | 2 | ||||
| -rw-r--r-- | libbb/copy_file.c | 24 | ||||
| -rw-r--r-- | libbb/inode_hash.c | 7 |
3 files changed, 31 insertions, 2 deletions
diff --git a/libbb/Makefile b/libbb/Makefile index ef8fef4..879be24 100644 --- a/libbb/Makefile +++ b/libbb/Makefile @@ -45,7 +45,7 @@ obj-y += ask_confirmation.o chomp.o concat_path_file.o copy_file.o \ xgetcwd.o xreadlink.o xregcomp.o interface.o remove_file.o last_char_is.o \ copyfd.o vherror_msg.o herror_msg.o herror_msg_and_die.o xgethostbyname.o \ dirname.o make_directory.o create_icmp_socket.o u_signal_names.o arith.o \ - simplify_path.o inet_common.o $(LIBBB_MOBJS) $(LIBBB_AROBJS) + simplify_path.o inet_common.o inode_hash.o $(LIBBB_MOBJS) $(LIBBB_AROBJS) # Hand off to toplevel Rules.mak diff --git a/libbb/copy_file.c b/libbb/copy_file.c index 29778f2..ea05c9b 100644 --- a/libbb/copy_file.c +++ b/libbb/copy_file.c @@ -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) { diff --git a/libbb/inode_hash.c b/libbb/inode_hash.c index 52c54cd..36484e6 100644 --- a/libbb/inode_hash.c +++ b/libbb/inode_hash.c @@ -29,6 +29,13 @@ #define HASH_SIZE 311 /* Should be prime */ #define hash_inode(i) ((i) % HASH_SIZE) +typedef struct ino_dev_hash_bucket_struct { + struct ino_dev_hash_bucket_struct *next; + ino_t ino; + dev_t dev; + char name[1]; +} ino_dev_hashtable_bucket_t; + static ino_dev_hashtable_bucket_t *ino_dev_hashtable[HASH_SIZE]; /* |