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authorJunio C Hamano <junkio@cox.net>2005-07-07 23:58:32 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2005-07-08 11:01:10 -0700
commit6fb737be5e4803feabe0d1b6169de36131936368 (patch)
treef9aa1d13875b921bff9dcf27692c90ef7223a90b /quote.c
parentb33e9666082ce692e64ccfd688dc2a5075566f75 (diff)
downloadgit-6fb737be5e4803feabe0d1b6169de36131936368.tar.gz
[PATCH] Make sq_expand() available as sq_quote().
A useful shell safety helper sq_expand() was hidden as a static function in diff.c. Extract it out and make it available as sq_quote(). Signed-off-by: Junio C Hamano <junkio@cox.net> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'quote.c')
-rw-r--r--quote.c41
1 files changed, 41 insertions, 0 deletions
diff --git a/quote.c b/quote.c
new file mode 100644
index 0000000000..5e6fda311c
--- /dev/null
+++ b/quote.c
@@ -0,0 +1,41 @@
+#include "cache.h"
+#include "quote.h"
+
+/* Help to copy the thing properly quoted for the shell safety.
+ * any single quote is replaced with '\'', and the caller is
+ * expected to enclose the result within a single quote pair.
+ *
+ * E.g.
+ * original sq_quote result
+ * name ==> name ==> 'name'
+ * a b ==> a b ==> 'a b'
+ * a'b ==> a'\''b ==> 'a'\''b'
+ */
+char *sq_quote(const char *src)
+{
+ static char *buf = NULL;
+ int cnt, c;
+ const char *cp;
+ char *bp;
+
+ /* count bytes needed to store the quoted string. */
+ for (cnt = 3, cp = src; *cp; cnt++, cp++)
+ if (*cp == '\'')
+ cnt += 3;
+
+ buf = xmalloc(cnt);
+ bp = buf;
+ *bp++ = '\'';
+ while ((c = *src++)) {
+ if (c != '\'')
+ *bp++ = c;
+ else {
+ bp = strcpy(bp, "'\\''");
+ bp += 4;
+ }
+ }
+ *bp++ = '\'';
+ *bp = 0;
+ return buf;
+}
+