diff mbox

[dpdk-dev,v3,01/24] lib/librte_eal: import libbsd strlcpy

Message ID 152609032721.121661.6937845392817292798.stgit@localhost.localdomain (mailing list archive)
State Superseded, archived
Delegated to: Thomas Monjalon
Headers show

Checks

Context Check Description
ci/checkpatch warning coding style issues
ci/Intel-compilation fail Compilation issues

Commit Message

Andy Green May 12, 2018, 1:58 a.m. UTC
Signed-off-by: Andy Green <andy@warmcat.com>
---
 lib/librte_eal/common/eal_common_string_fns.c  |   34 ++++++++++++++++++++++++
 lib/librte_eal/common/include/rte_string_fns.h |    7 +----
 2 files changed, 36 insertions(+), 5 deletions(-)

Comments

Thomas Monjalon May 13, 2018, 2:56 p.m. UTC | #1
Hi,

12/05/2018 03:58, Andy Green:
> Signed-off-by: Andy Green <andy@warmcat.com>

Why do we need to replace rte_strlcpy fallback?
GCC 8 complains about the fallback using snprintf?


> +/*
> + * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
> + *
> + * Permission to use, copy, modify, and distribute this software for any
> + * purpose with or without fee is hereby granted, provided that the above
> + * copyright notice and this permission notice appear in all copies.
> + */
> +
> +size_t
> +rte_strlcpy(char *dst, const char *src, size_t siz)
> +{
[...]
> +}

I would like to be sure there is no legal issue with this imported code.


[...]
> -static inline size_t
> -rte_strlcpy(char *dst, const char *src, size_t size)
> -{
> -	return snprintf(dst, size, "%s", src);
> -}
> +size_t
> +rte_strlcpy(char *dst, const char *src, size_t size);
Andy Green May 13, 2018, 11:07 p.m. UTC | #2
On 05/13/2018 10:56 PM, Thomas Monjalon wrote:
> Hi,
> 
> 12/05/2018 03:58, Andy Green:
>> Signed-off-by: Andy Green <andy@warmcat.com>
> 
> Why do we need to replace rte_strlcpy fallback?
> GCC 8 complains about the fallback using snprintf?

No; the first version of this patch just fixed the compiler warnings. 
But Stephen Hemminger <stephen@networkplumber.org> requested the ersatz 
rte_strlcpy be replaced --->

> 
>> +/*
>> + * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
>> + *
>> + * Permission to use, copy, modify, and distribute this software for any
>> + * purpose with or without fee is hereby granted, provided that the above
>> + * copyright notice and this permission notice appear in all copies.
>> + */
>> +
>> +size_t
>> +rte_strlcpy(char *dst, const char *src, size_t siz)
>> +{
> [...]
>> +}
> 
> I would like to be sure there is no legal issue with this imported code.

"with the one from BSD".  If it's OK to use BSD anything then the way 
this is imported should be respecting the original license.

-Andy

> 
> [...]
>> -static inline size_t
>> -rte_strlcpy(char *dst, const char *src, size_t size)
>> -{
>> -	return snprintf(dst, size, "%s", src);
>> -}
>> +size_t
>> +rte_strlcpy(char *dst, const char *src, size_t size);
> 
> 
>
diff mbox

Patch

diff --git a/lib/librte_eal/common/eal_common_string_fns.c b/lib/librte_eal/common/eal_common_string_fns.c
index 6ac5f8289..275f6fd03 100644
--- a/lib/librte_eal/common/eal_common_string_fns.c
+++ b/lib/librte_eal/common/eal_common_string_fns.c
@@ -38,3 +38,37 @@  rte_strsplit(char *string, int stringlen,
 	errno = EINVAL;
 	return -1;
 }
+
+/*
+ * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ */
+
+size_t
+rte_strlcpy(char *dst, const char *src, size_t siz)
+{
+	char *d = dst;
+	const char *s = src;
+	size_t n = siz;
+
+	/* Copy as many bytes as will fit */
+	if (n != 0) {
+		while (--n != 0) {
+			if ((*d++ = *s++) == '\0')
+				break;
+		}
+	}
+
+	/* Not enough room in dst, add NUL and traverse rest of src */
+	if (n == 0) {
+		if (siz != 0)
+			*d = '\0';		/* NUL-terminate dst */
+		while (*s++)
+			;
+	}
+
+	return(s - src - 1);	/* count does not include NUL */
+}
diff --git a/lib/librte_eal/common/include/rte_string_fns.h b/lib/librte_eal/common/include/rte_string_fns.h
index fcbb42e00..d4389bcf4 100644
--- a/lib/librte_eal/common/include/rte_string_fns.h
+++ b/lib/librte_eal/common/include/rte_string_fns.h
@@ -52,11 +52,8 @@  rte_strsplit(char *string, int stringlen,
  * DPDK-specific version of strlcpy for systems without
  * libc or libbsd copies of the function
  */
-static inline size_t
-rte_strlcpy(char *dst, const char *src, size_t size)
-{
-	return snprintf(dst, size, "%s", src);
-}
+size_t
+rte_strlcpy(char *dst, const char *src, size_t size);
 
 /* pull in a strlcpy function */
 #ifdef RTE_EXEC_ENV_BSDAPP