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This is because the > source from cmdline library is 128 bytes and the destination buffer is > 64-bytes. > > commands.c: In function 'cmd_obj_add_parsed': > .../__BUILDS/build-x86-generic/install/usr/local/include/rte_string_fns.h:61:24: warning: '%s' directive output may be truncated writing up to 127 bytes into a region of size 64 [-Wformat-truncation=] > 61 | return (size_t)snprintf(dst, size, "%s", src); > | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > In file included from /usr/include/stdio.h:894, > from commands.c:7: > /usr/include/x86_64-linux-gnu/bits/stdio2.h:71:10: note: '__builtin_snprintf' output between 1 and 128 bytes into a destination of size 64 > > Multiple options are possible to fix this, but the one taken in this > patch is to ensure truncation never occurs by setting the destination > buffer size to be the same as that used by the cmdline library. > > Fixes: af75078fece3 ("first public release") > Cc: stable@dpdk.org > > Signed-off-by: Bruce Richardson > --- > examples/cmdline/parse_obj_list.h | 3 ++- > 1 file changed, 2 insertions(+), 1 deletion(-) > > diff --git a/examples/cmdline/parse_obj_list.h b/examples/cmdline/parse_obj_list.h > index 6516d3e2c2..1223ac1e8b 100644 > --- a/examples/cmdline/parse_obj_list.h > +++ b/examples/cmdline/parse_obj_list.h > @@ -12,8 +12,9 @@ > > #include > #include > +#include > > -#define OBJ_NAME_LEN_MAX 64 > +#define OBJ_NAME_LEN_MAX sizeof(cmdline_fixed_string_t) > > struct object { > SLIST_ENTRY(object) next; I confirm it solves the build warning, but what about to get rid of `OBJ_NAME_LEN_MAX` completely if the intentions is to make size same as cmdline library array: diff --git a/examples/cmdline/parse_obj_list.c b/examples/cmdline/parse_obj_list.c index 959bcd14527e..7b24bfb035d7 100644 --- a/examples/cmdline/parse_obj_list.c +++ b/examples/cmdline/parse_obj_list.c @@ -46,7 +46,7 @@ parse_obj_list(cmdline_parse_token_hdr_t *tk, const char *buf, void *res, token_len++; SLIST_FOREACH(o, tkd->list, next) { - if (token_len != strnlen(o->name, OBJ_NAME_LEN_MAX)) + if (token_len != strnlen(o->name, STR_TOKEN_SIZE)) continue; if (strncmp(buf, o->name, token_len)) continue; @@ -91,7 +91,7 @@ int complete_get_elt_obj_list(cmdline_parse_token_hdr_t *tk, if (!o) return -1; - len = strnlen(o->name, OBJ_NAME_LEN_MAX); + len = strnlen(o->name, STR_TOKEN_SIZE); if ((len + 1) > size) return -1; diff --git a/examples/cmdline/parse_obj_list.h b/examples/cmdline/parse_obj_list.h index 6516d3e2c236..ba234601f106 100644 --- a/examples/cmdline/parse_obj_list.h +++ b/examples/cmdline/parse_obj_list.h @@ -12,12 +12,11 @@ #include #include - -#define OBJ_NAME_LEN_MAX 64 +#include struct object { SLIST_ENTRY(object) next; - char name[OBJ_NAME_LEN_MAX]; + cmdline_fixed_string_t name; cmdline_ipaddr_t ip; };