shared.c: do not modify const memory

Noticed-by: zhongjj <zhongjj@lemote.com>
Signed-off-by: Lars Hjemli <hjemli@gmail.com>

1 files changed, 3 insertions, 11 deletions

diff --git a/shared.c b/shared.c
index 7ec2e19..3926b4a 100644
--- a/shared.c
+++ b/shared.c
@@ -91,41 +91,33 @@ void *cgit_free_commitinfo(struct commitinfo *info)
         free(info->committer);
         free(info->committer_email);
         free(info->subject);
         free(info->msg);
         free(info->msg_encoding);
         free(info);
         return NULL;
 }
 
 char *trim_end(const char *str, char c)
 {
         int len;
-        char *s, *t;
 
         if (str == NULL)
                 return NULL;
-        t = (char *)str;
-        len = strlen(t);
-        while(len > 0 && t[len - 1] == c)
+        len = strlen(str);
+        while(len > 0 && str[len - 1] == c)
                 len--;
-
         if (len == 0)
                 return NULL;
-
-        c = t[len];
-        t[len] = '\0';
-        s = xstrdup(t);
-        t[len] = c;
-        return s;
+        return xstrndup(str, len);
 }
 
 char *strlpart(char *txt, int maxlen)
 {
         char *result;
 
         if (!txt)
                 return txt;
 
         if (strlen(txt) <= maxlen)
                 return txt;
         result = xmalloc(maxlen + 1);