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Diffstat (limited to 'tools/bpf/bpftool/main.c')
-rw-r--r--tools/bpf/bpftool/main.c104
1 files changed, 89 insertions, 15 deletions
diff --git a/tools/bpf/bpftool/main.c b/tools/bpf/bpftool/main.c
index 185acfa229b5..1ec852d21d44 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;
@@ -157,6 +160,54 @@ void fprint_hex(FILE *f, void *arg, unsigned int n, const char *sep)
}
}
+/* Split command line into argument vector. */
+static int make_args(char *line, char *n_argv[], int maxargs, int cmd_nb)
+{
+ static const char ws[] = " \t\r\n";
+ char *cp = line;
+ int n_argc = 0;
+
+ while (*cp) {
+ /* Skip leading whitespace. */
+ cp += strspn(cp, ws);
+
+ if (*cp == '\0')
+ break;
+
+ if (n_argc >= (maxargs - 1)) {
+ p_err("too many arguments to command %d", cmd_nb);
+ return -1;
+ }
+
+ /* Word begins with quote. */
+ if (*cp == '\'' || *cp == '"') {
+ char quote = *cp++;
+
+ n_argv[n_argc++] = cp;
+ /* Find ending quote. */
+ cp = strchr(cp, quote);
+ if (!cp) {
+ p_err("unterminated quoted string in command %d",
+ cmd_nb);
+ return -1;
+ }
+ } else {
+ n_argv[n_argc++] = cp;
+
+ /* Find end of word. */
+ cp += strcspn(cp, ws);
+ if (*cp == '\0')
+ break;
+ }
+
+ /* Separate words. */
+ *cp++ = 0;
+ }
+ n_argv[n_argc] = NULL;
+
+ return n_argc;
+}
+
static int do_batch(int argc, char **argv);
static const struct cmd cmds[] = {
@@ -171,11 +222,12 @@ 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;
int err;
int i;
@@ -191,7 +243,10 @@ static int do_batch(int argc, char **argv)
}
NEXT_ARG();
- fp = fopen(*argv, "r");
+ if (!strcmp(*argv, "-"))
+ fp = stdin;
+ else
+ fp = fopen(*argv, "r");
if (!fp) {
p_err("Can't open file (%s): %s", *argv, strerror(errno));
return -1;
@@ -200,27 +255,45 @@ static int do_batch(int argc, char **argv)
if (json_output)
jsonw_start_array(json_wtr);
while (fgets(buf, sizeof(buf), fp)) {
+ cp = strchr(buf, '#');
+ if (cp)
+ *cp = '\0';
+
if (strlen(buf) == sizeof(buf) - 1) {
errno = E2BIG;
break;
}
- 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",
+ /* 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);
- n_argc = 0;
- break;
+ 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;
}
- n_argv[n_argc] = strtok(NULL, " \t\n");
+ buf[strlen(buf) - 2] = '\0';
+ strcat(buf, contline);
}
+ n_argc = make_args(buf, n_argv, BATCH_ARG_NB_MAX, lines);
if (!n_argc)
continue;
+ if (n_argc < 0)
+ goto err_close;
if (json_output) {
jsonw_start_object(json_wtr);
@@ -247,11 +320,12 @@ 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:
- fclose(fp);
+ if (fp != stdin)
+ fclose(fp);
if (json_output)
jsonw_end_array(json_wtr);