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authorQuentin Monnet <quentin.monnet@netronome.com>2018-03-02 07:20:09 +0300
committerDaniel Borkmann <daniel@iogearbox.net>2018-03-02 11:46:41 +0300
commit65d538dde625d93359ca4e33d2311f8598f423a6 (patch)
treefda392419d61ff5d265c4cef5ab99b35dc49c8dd /tools/bpf
parent06cc7fe7c2951e64cd5e73ea447791c7e6bc3852 (diff)
downloadlinux-65d538dde625d93359ca4e33d2311f8598f423a6.tar.xz
tools: bpftool: support continuation lines in batch files
Add support for continuation lines, such as in the following example: prog show prog dump xlated \ id 1337 opcodes This patch is based after the code for support for continuation lines from file lib/utils.c from package iproute2. "Lines" in error messages are renamed as "commands", as we count the number of commands (but we ignore empty lines, comments, and do not add continuation lines to the count). Signed-off-by: Quentin Monnet <quentin.monnet@netronome.com> Acked-by: Jakub Kicinski <jakub.kicinski@netronome.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Diffstat (limited to 'tools/bpf')
-rw-r--r--tools/bpf/bpftool/main.c36
1 files changed, 32 insertions, 4 deletions
diff --git a/tools/bpf/bpftool/main.c b/tools/bpf/bpftool/main.c
index 79587e6decae..cdee4c3d30c3 100644
--- a/tools/bpf/bpftool/main.c
+++ b/tools/bpf/bpftool/main.c
@@ -46,6 +46,9 @@
#include "main.h"
+#define BATCH_LINE_LEN_MAX 65536
+#define BATCH_ARG_NB_MAX 4096
+
const char *bin_name;
static int last_argc;
static char **last_argv;
@@ -171,9 +174,9 @@ static const struct cmd cmds[] = {
static int do_batch(int argc, char **argv)
{
+ char buf[BATCH_LINE_LEN_MAX], contline[BATCH_LINE_LEN_MAX];
+ char *n_argv[BATCH_ARG_NB_MAX];
unsigned int lines = 0;
- char *n_argv[4096];
- char buf[65536];
int n_argc;
FILE *fp;
char *cp;
@@ -210,13 +213,38 @@ static int do_batch(int argc, char **argv)
break;
}
+ /* Append continuation lines if any (coming after a line ending
+ * with '\' in the batch file).
+ */
+ while ((cp = strstr(buf, "\\\n")) != NULL) {
+ if (!fgets(contline, sizeof(contline), fp) ||
+ strlen(contline) == 0) {
+ p_err("missing continuation line on command %d",
+ lines);
+ err = -1;
+ goto err_close;
+ }
+
+ cp = strchr(contline, '#');
+ if (cp)
+ *cp = '\0';
+
+ if (strlen(buf) + strlen(contline) + 1 > sizeof(buf)) {
+ p_err("command %d is too long", lines);
+ err = -1;
+ goto err_close;
+ }
+ buf[strlen(buf) - 2] = '\0';
+ strcat(buf, contline);
+ }
+
n_argc = 0;
n_argv[n_argc] = strtok(buf, " \t\n");
while (n_argv[n_argc]) {
n_argc++;
if (n_argc == ARRAY_SIZE(n_argv)) {
- p_err("line %d has too many arguments, skip",
+ p_err("command %d has too many arguments, skip",
lines);
n_argc = 0;
break;
@@ -252,7 +280,7 @@ static int do_batch(int argc, char **argv)
p_err("reading batch file failed: %s", strerror(errno));
err = -1;
} else {
- p_info("processed %d lines", lines);
+ p_info("processed %d commands", lines);
err = 0;
}
err_close: