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authorRob Landley <rob@landley.net>2013-02-10 18:04:15 -0600
committerRob Landley <rob@landley.net>2013-02-10 18:04:15 -0600
commit865afc55d04ede07db830c767bec75fb67c3ff6f (patch)
tree79d7ac35426205893de9116efa293fb558d7930e /toys/posix/cp.c
parentd1fcf4faf98374d4e24ca2c71e703589d348ee35 (diff)
downloadtoybox-865afc55d04ede07db830c767bec75fb67c3ff6f.tar.gz
Implement cp -s option.
Diffstat (limited to 'toys/posix/cp.c')
-rw-r--r--toys/posix/cp.c28
1 files changed, 28 insertions, 0 deletions
diff --git a/toys/posix/cp.c b/toys/posix/cp.c
index 705c4bfb..8f6ab0e1 100644
--- a/toys/posix/cp.c
+++ b/toys/posix/cp.c
@@ -91,6 +91,7 @@ int cp_node(struct dirtree *try)
if (S_ISDIR(try->st.st_dev)) {
error_msg("dir at '%s'", s = dirtree_path(try, 0));
free(s);
+ return 0;
} else if (flags & FLAG_n) return 0;
else if (flags & FLAG_i) {
fprintf(stderr, "cp: overwrite '%s'", s = dirtree_path(try, 0));
@@ -138,6 +139,33 @@ int cp_node(struct dirtree *try)
} else if (flags & FLAG_l) {
if (!linkat(tfd, try->name, cfd, catch, 0)) err = 0;
+ // Copy tree as symlinks. For non-absolute paths this involves
+ // appending the right number of .. entries as you go down the tree.
+
+ } else if (flags & FLAG_s) {
+ char *s;
+ struct dirtree *or;
+ int dotdots = 0;
+
+ s = dirtree_path(try, 0);
+ for (or = try; or->parent; or = or->parent) dotdots++;
+
+ if (*or->name == '/') dotdots = 0;
+ if (dotdots) {
+ char *s2 = xmsprintf("% *c%s", 3*dotdots, ' ', s);
+ free(s);
+ s = s2;
+ while(dotdots--) {
+ memcpy(s2, "../", 3);
+ s2 += 3;
+ }
+ }
+ if (!symlinkat(s, cfd, catch)) {
+ err = 0;
+ fdout = AT_FDCWD;
+ }
+ free(s);
+
// Do something _other_ than copy contents of a file?
} else if (!S_ISREG(try->st.st_mode)
&& (try->parent || (flags & (FLAG_a|FLAG_r))))