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du.c: add symlink dereferencing flags -H and -L

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This commit is contained in:
Tai Chi Minh Ralph Eastwood 2015-02-09 22:18:49 +00:00 committed by sin
parent bd89474b8a
commit 1d2d28a8e4
1 changed files with 17 additions and 6 deletions
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23
du.c
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@ -21,6 +21,7 @@ static int dflag = 0;
static int sflag = 0;
static int kflag = 0;
static int hflag = 0;
static char HLflag = 'P';
static char *
xrealpath(const char *pathname, char *resolved)
@ -68,7 +69,7 @@ nblks(struct stat *st)
}
static size_t
du(const char *path)
du(const char *path, char follow)
{
struct dirent *dent;
struct stat st;
@ -81,9 +82,13 @@ du(const char *path)
eprintf("stat: %s:", path);
n = nblks(&st);
if (!S_ISDIR(st.st_mode))
if (!(S_ISDIR(st.st_mode) ||
(follow != 'P' && S_ISLNK(st.st_mode) &&
stat(path, &st) == 0 && S_ISDIR(st.st_mode))))
goto done;
follow = follow == 'H' ? 'P' : follow;
dp = opendir(path);
if (!dp) {
weprintf("opendir %s:", path);
@ -97,10 +102,12 @@ du(const char *path)
continue;
if (lstat(dent->d_name, &st) < 0)
eprintf("stat: %s:", dent->d_name);
if (S_ISDIR(st.st_mode)) {
if (S_ISDIR(st.st_mode) ||
(follow != 'P' && S_ISLNK(st.st_mode) &&
stat(dent->d_name, &st) == 0 && S_ISDIR(st.st_mode))) {
t = curdepth;
curdepth++;
n += du(dent->d_name);
n += du(dent->d_name, follow);
curdepth = t;
continue;
}
@ -157,6 +164,10 @@ main(int argc, char *argv[])
case 'h':
hflag = 1;
break;
case 'H':
case 'L':
HLflag = ARGC();
break;
default:
usage();
} ARGEND;
@ -172,13 +183,13 @@ main(int argc, char *argv[])
blksize = 1024;
if (argc < 1) {
n = du(".");
n = du(".", HLflag);
if (sflag)
print(n, xrealpath(".", file));
} else {
for (; argc > 0; argc--, argv++) {
curdepth = 0;
n = du(argv[0]);
n = du(argv[0], HLflag);
if (sflag)
print(n, xrealpath(argv[0], file));
}