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cansend.c: Reformat help/usage output to be compatible with help2man. 

Gbp-Pq: Name 0010-cansend.c-Reformat-help-usage-output-to-be-compatibl.patch
pull/69/head
Alexander GQ Gerasiov 2020-04-11 14:19:51 +03:00 committed by Alexander Gerasiov
parent f638cdc79b
commit b43d1b4d27
1 changed files with 26 additions and 15 deletions
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41
cansend.c
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@ -56,6 +56,29 @@
#include "lib.h"
void print_usage(char *prg)
{
fprintf(stderr, "Usage: %s - simple command line tool to send CAN-frames via CAN_RAW sockets.\n", prg);
fprintf(stderr, "Usage: %s <device> <can_frame>.\n", prg);
fprintf(stderr, "<can_frame>:\n");
fprintf(stderr, " <can_id>#{data} for 'classic' CAN 2.0 data frames\n");
fprintf(stderr, " <can_id>#R{len} for 'classic' CAN 2.0 data frames\n");
fprintf(stderr, " <can_id>##<flags>{data} for CAN FD frames\n\n");
fprintf(stderr, "<can_id>:\n"
" 3 (SFF) or 8 (EFF) hex chars\n");
fprintf(stderr, "{data}:\n"
" 0..8 (0..64 CAN FD) ASCII hex-values (optionally separated by '.')\n");
fprintf(stderr, "{len}:\n"
" an optional 0..8 value as RTR frames can contain a valid dlc field\n");
fprintf(stderr, "<flags>:\n"
" a single ASCII Hex value (0 .. F) which defines canfd_frame.flags\n\n");
fprintf(stderr, "Examples:\n");
fprintf(stderr, " 5A1#11.2233.44556677.88 / 123#DEADBEEF / 5AA# / 123##1 / 213##311223344 /\n"
" 1F334455#1122334455667788 / 123#R / 00000123#R3\n\n");
}
int main(int argc, char **argv)
{
int s; /* can raw socket */
@ -68,27 +91,15 @@ int main(int argc, char **argv)
/* check command line options */
if (argc != 3) {
fprintf(stderr, "Usage: %s <device> <can_frame>.\n", argv[0]);
print_usage(argv[0]);
return 1;
}
/* parse CAN frame */
required_mtu = parse_canframe(argv[2], &frame);
if (!required_mtu){
fprintf(stderr, "\nWrong CAN-frame format! Try:\n\n");
fprintf(stderr, " <can_id>#{data} for 'classic' CAN 2.0 data frames\n");
fprintf(stderr, " <can_id>#R{len} for 'classic' CAN 2.0 RTR frames\n");
fprintf(stderr, " <can_id>##<flags>{data} for CAN FD frames\n\n");
fprintf(stderr, "<can_id> can have 3 (SFF) or 8 (EFF) hex chars\n");
fprintf(stderr, "{data} has 0..8 (0..64 CAN FD) ASCII hex-values (optionally");
fprintf(stderr, " separated by '.')\n");
fprintf(stderr, "{len} is an optional 0..8 value as RTR frames can contain a");
fprintf(stderr, " valid dlc field\n");
fprintf(stderr, "<flags> a single ASCII Hex value (0 .. F) which defines");
fprintf(stderr, " canfd_frame.flags\n\n");
fprintf(stderr, "e.g. 5A1#11.2233.44556677.88 / 123#DEADBEEF / 5AA# / ");
fprintf(stderr, "123##1 / 213##311223344\n 1F334455#1122334455667788 / ");
fprintf(stderr, "123#R / 00000123#R3\n\n");
fprintf(stderr, "\nWrong CAN-frame format!\n\n");
print_usage(argv[0]);
return 1;
}