[PATCH] i2ctransfer: Drop redundant variable arg_idx

[PATCH] i2ctransfer: Drop redundant variable arg_idx

[Jean Delvare]

arg_idx has the same meaning as getopt's optind global variable, so
drop the former and use the latter. Once getopt() is done parsing the
options, there should be no problem using it for ourselves.

Sigend-off-by: Jean Delvare <jdelvare@suse.de>
---
I can't easily test this, Wolfram can you please do it?

 tools/i2ctransfer.c |   15 +++++++--------
 1 file changed, 7 insertions(+), 8 deletions(-)

--- i2c-tools.orig/tools/i2ctransfer.c	2022-05-24 11:34:48.901029181 +0200
+++ i2c-tools/tools/i2ctransfer.c	2022-05-24 11:38:35.637104513 +0200
@@ -131,7 +131,7 @@ static int confirm(const char *filename,
 int main(int argc, char *argv[])
 {
 	char filename[20];
-	int i2cbus, address = -1, file, opt, arg_idx, nmsgs = 0, nmsgs_sent, i;
+	int i2cbus, address = -1, file, opt, nmsgs = 0, nmsgs_sent, i;
 	int force = 0, yes = 0, version = 0, verbose = 0, all_addrs = 0;
 	struct i2c_msg msgs[I2C_RDRW_IOCTL_MAX_MSGS];
 	enum parse_state state = PARSE_GET_DESC;
@@ -160,13 +160,12 @@ int main(int argc, char *argv[])
 		exit(0);
 	}
 
-	arg_idx = optind;
-	if (arg_idx == argc) {
+	if (optind == argc) {
 		help();
 		exit(1);
 	}
 
-	i2cbus = lookup_i2c_bus(argv[arg_idx++]);
+	i2cbus = lookup_i2c_bus(argv[optind++]);
 	if (i2cbus < 0)
 		exit(1);
 
@@ -174,8 +173,8 @@ int main(int argc, char *argv[])
 	if (file < 0 || check_funcs(file))
 		exit(1);
 
-	while (arg_idx < argc) {
-		char *arg_ptr = argv[arg_idx];
+	while (optind < argc) {
+		char *arg_ptr = argv[optind];
 		unsigned long len, raw_data;
 		__u16 flags;
 		__u8 data, *buf;
@@ -310,7 +309,7 @@ int main(int argc, char *argv[])
 			goto err_out;
 		}
 
-		arg_idx++;
+		optind++;
 	}
 
 	if (state != PARSE_GET_DESC || nmsgs == 0) {
@@ -342,7 +341,7 @@ int main(int argc, char *argv[])
 	exit(0);
 
  err_out_with_arg:
-	fprintf(stderr, "Error: faulty argument is '%s'\n", argv[arg_idx]);
+	fprintf(stderr, "Error: faulty argument is '%s'\n", argv[optind]);
  err_out:
 	close(file);
 


-- 
Jean Delvare
SUSE L3 Support