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| author | Ivan Delalande <colona@arista.com> | 2017-10-06 16:48:19 -0700 |
|---|---|---|
| committer | Stephen Hemminger <stephen@networkplumber.org> | 2017-10-11 11:04:47 -0700 |
| commit | 7c72df5a95174c21bdc4ca09cd15a88c0c10e568 (patch) | |
| tree | 5f36247552a86257ed843130c0db91c18ad6a072 | |
| parent | 4f6b73380d2c84b98b7beffe6ca73f635ab72a06 (diff) | |
| download | platform_external_iproute2-7c72df5a95174c21bdc4ca09cd15a88c0c10e568.tar.gz platform_external_iproute2-7c72df5a95174c21bdc4ca09cd15a88c0c10e568.tar.bz2 platform_external_iproute2-7c72df5a95174c21bdc4ca09cd15a88c0c10e568.zip | |
utils: add print_escape_buf to format and print arbitrary bytes
Keep it as simple as possible for now: just escape anything that is not
isprint-able, is among the "escape" parameter or '\' as an octal escape
sequence. This should be pretty easy to extend if any other user needs
something more complex in the future.
Signed-off-by: Ivan Delalande <colona@arista.com>
| -rw-r--r-- | include/utils.h | 2 | ||||
| -rw-r--r-- | lib/utils.c | 15 |
2 files changed, 17 insertions, 0 deletions
diff --git a/include/utils.h b/include/utils.h index 76addb32..3d91c50d 100644 --- a/include/utils.h +++ b/include/utils.h @@ -195,6 +195,8 @@ static inline void __jiffies_to_tv(struct timeval *tv, unsigned long jiffies) tv->tv_usec = tvusec - 1000000 * tv->tv_sec; } +void print_escape_buf(const __u8 *buf, size_t len, const char *escape); + int print_timestamp(FILE *fp); void print_nlmsg_timestamp(FILE *fp, const struct nlmsghdr *n); diff --git a/lib/utils.c b/lib/utils.c index 632fd0dd..ac155bf5 100644 --- a/lib/utils.c +++ b/lib/utils.c @@ -31,6 +31,7 @@ #include <time.h> #include <sys/time.h> #include <errno.h> +#include <ctype.h> #include "rt_names.h" #include "utils.h" @@ -1047,6 +1048,20 @@ int addr64_n2a(__u64 addr, char *buff, size_t len) return written; } +/* Print buffer and escape bytes that are !isprint or among 'escape' */ +void print_escape_buf(const __u8 *buf, size_t len, const char *escape) +{ + size_t i; + + for (i = 0; i < len; ++i) { + if (isprint(buf[i]) && buf[i] != '\\' && + !strchr(escape, buf[i])) + printf("%c", buf[i]); + else + printf("\\%03o", buf[i]); + } +} + int print_timestamp(FILE *fp) { struct timeval tv; |