Re: [PATCH] kernfs: Replace strncpy with memcpy
On Sun, Jul 01, 2018 at 01:57:13PM -0700, Guenter Roeck wrote: > gcc 8.1.0 complains: > > fs/kernfs/symlink.c:91:3: warning: > 'strncpy' output truncated before terminating nul copying > as many bytes from a string as its length > fs/kernfs/symlink.c: In function 'kernfs_iop_get_link': > fs/kernfs/symlink.c:88:14: note: length computed here > > Using strncpy() is indeed less than perfect since the length of data to > be copied has already been determined with strlen(). Replace strncpy() > with memcpy() to address the warning and optimize the code a little. > > Signed-off-by: Guenter Roeck Acked-by: Tejun Heo Thanks. -- tejun
Re: [PATCH] kernfs: Replace strncpy with memcpy
On Sun, Jul 01, 2018 at 01:57:13PM -0700, Guenter Roeck wrote: > gcc 8.1.0 complains: > > fs/kernfs/symlink.c:91:3: warning: > 'strncpy' output truncated before terminating nul copying > as many bytes from a string as its length > fs/kernfs/symlink.c: In function 'kernfs_iop_get_link': > fs/kernfs/symlink.c:88:14: note: length computed here > > Using strncpy() is indeed less than perfect since the length of data to > be copied has already been determined with strlen(). Replace strncpy() > with memcpy() to address the warning and optimize the code a little. > > Signed-off-by: Guenter Roeck Acked-by: Tejun Heo Thanks. -- tejun
[PATCH] kernfs: Replace strncpy with memcpy
gcc 8.1.0 complains: fs/kernfs/symlink.c:91:3: warning: 'strncpy' output truncated before terminating nul copying as many bytes from a string as its length fs/kernfs/symlink.c: In function 'kernfs_iop_get_link': fs/kernfs/symlink.c:88:14: note: length computed here Using strncpy() is indeed less than perfect since the length of data to be copied has already been determined with strlen(). Replace strncpy() with memcpy() to address the warning and optimize the code a little. Signed-off-by: Guenter Roeck --- fs/kernfs/symlink.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/kernfs/symlink.c b/fs/kernfs/symlink.c index 08ccabd7047f..5145ae2f0572 100644 --- a/fs/kernfs/symlink.c +++ b/fs/kernfs/symlink.c @@ -88,7 +88,7 @@ static int kernfs_get_target_path(struct kernfs_node *parent, int slen = strlen(kn->name); len -= slen; - strncpy(s + len, kn->name, slen); + memcpy(s + len, kn->name, slen); if (len) s[--len] = '/'; -- 2.7.4
[PATCH] kernfs: Replace strncpy with memcpy
gcc 8.1.0 complains: fs/kernfs/symlink.c:91:3: warning: 'strncpy' output truncated before terminating nul copying as many bytes from a string as its length fs/kernfs/symlink.c: In function 'kernfs_iop_get_link': fs/kernfs/symlink.c:88:14: note: length computed here Using strncpy() is indeed less than perfect since the length of data to be copied has already been determined with strlen(). Replace strncpy() with memcpy() to address the warning and optimize the code a little. Signed-off-by: Guenter Roeck --- fs/kernfs/symlink.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/kernfs/symlink.c b/fs/kernfs/symlink.c index 08ccabd7047f..5145ae2f0572 100644 --- a/fs/kernfs/symlink.c +++ b/fs/kernfs/symlink.c @@ -88,7 +88,7 @@ static int kernfs_get_target_path(struct kernfs_node *parent, int slen = strlen(kn->name); len -= slen; - strncpy(s + len, kn->name, slen); + memcpy(s + len, kn->name, slen); if (len) s[--len] = '/'; -- 2.7.4
