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find: implement -samefile

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function                                             old     new   delta
parse_params                                        1461    1606    +145
func_samefile                                          -      42     +42
packed_usage                                       34079   34102     +23
static.params                                        261     271     +10
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 3/0 up/down: 220/0)             Total: 220 bytes

Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Aaro Koskinen 2021-11-28 12:11:48 +02:00 committed by Denys Vlasenko
parent 7105e4afdd
commit aaade69ce9
1 changed files with 35 additions and 0 deletions
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35
findutils/find.c
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@ -155,6 +155,13 @@
//config: default y
//config: depends on FIND
//config:
//config:config FEATURE_FIND_SAMEFILE
//config: bool "Enable -samefile: reference file matching"
//config: default y
//config: depends on FIND
//config: help
//config: Support the 'find -samefile' option for searching by a reference file.
//config:
//config:config FEATURE_FIND_EXEC
//config: bool "Enable -exec: execute commands"
//config: default y
@ -350,6 +357,9 @@
//usage: IF_FEATURE_FIND_INUM(
//usage: "\n -inum N File has inode number N"
//usage: )
//usage: IF_FEATURE_FIND_SAMEFILE(
//usage: "\n -samefile FILE File is same as FILE"
//usage: )
//usage: IF_FEATURE_FIND_USER(
//usage: "\n -user NAME/ID File is owned by given user"
//usage: )
@ -444,6 +454,7 @@ IF_FEATURE_FIND_MTIME( ACTS(mtime, unsigned char time_type; unsigned char mtime
IF_FEATURE_FIND_MMIN( ACTS(mmin, unsigned char time_type; unsigned char mmin_char; unsigned mmin_mins;))
IF_FEATURE_FIND_NEWER( ACTS(newer, time_t newer_mtime;))
IF_FEATURE_FIND_INUM( ACTS(inum, ino_t inode_num;))
IF_FEATURE_FIND_SAMEFILE(ACTS(samefile, ino_t inode_num; dev_t device;))
IF_FEATURE_FIND_USER( ACTS(user, uid_t uid;))
IF_FEATURE_FIND_SIZE( ACTS(size, char size_char; off_t size;))
IF_FEATURE_FIND_CONTEXT(ACTS(context, security_context_t context;))
@ -731,6 +742,13 @@ ACTF(inum)
return (statbuf->st_ino == ap->inode_num);
}
#endif
#if ENABLE_FEATURE_FIND_SAMEFILE
ACTF(samefile)
{
return statbuf->st_ino == ap->inode_num &&
statbuf->st_dev == ap->device;
}
#endif
#if ENABLE_FEATURE_FIND_EXEC
static int do_exec(action_exec *ap, const char *fileName)
{
@ -1125,6 +1143,7 @@ static action*** parse_params(char **argv)
IF_FEATURE_FIND_CMIN( PARM_cmin ,)
IF_FEATURE_FIND_NEWER( PARM_newer ,)
IF_FEATURE_FIND_INUM( PARM_inum ,)
IF_FEATURE_FIND_SAMEFILE(PARM_samefile ,)
IF_FEATURE_FIND_USER( PARM_user ,)
IF_FEATURE_FIND_GROUP( PARM_group ,)
IF_FEATURE_FIND_SIZE( PARM_size ,)
@ -1173,6 +1192,7 @@ static action*** parse_params(char **argv)
IF_FEATURE_FIND_CMIN( "-cmin\0" )
IF_FEATURE_FIND_NEWER( "-newer\0" )
IF_FEATURE_FIND_INUM( "-inum\0" )
IF_FEATURE_FIND_SAMEFILE("-samefile\0")
IF_FEATURE_FIND_USER( "-user\0" )
IF_FEATURE_FIND_GROUP( "-group\0" )
IF_FEATURE_FIND_SIZE( "-size\0" )
@ -1511,6 +1531,21 @@ static action*** parse_params(char **argv)
ap->inode_num = xatoul(arg1);
}
#endif
#if ENABLE_FEATURE_FIND_SAMEFILE
else if (parm == PARM_samefile) {
action_samefile *ap;
struct stat stbuf;
dbg("%d", __LINE__);
if (G.recurse_flags & (ACTION_FOLLOWLINKS |
ACTION_FOLLOWLINKS_L0))
xstat(arg1, &stbuf);
else if (lstat(arg1, &stbuf))
bb_perror_msg_and_die("can't stat '%s'", arg1);
ap = ALLOC_ACTION(samefile);
ap->inode_num = stbuf.st_ino;
ap->device = stbuf.st_dev;
}
#endif
#if ENABLE_FEATURE_FIND_USER
else if (parm == PARM_user) {
action_user *ap;