From 89402128bb7e993a375cf54476e3627826dc071c Mon Sep 17 00:00:00 2001
From: Gergő J. Miklós
Date: Fri, 16 Oct 2020 23:47:49 +0200
Subject: i2sensors: some errorhandling

---
 src/main.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/main.c b/src/main.c
index d9644be..3ba3da3 100644
--- a/src/main.c
+++ b/src/main.c
@@ -100,11 +100,11 @@ __uint8_t   *xchg_data  (__uint8_t *buf, __uint16_t wrlen, __uint16_t waitlen, _
 
 #ifdef WITH_I2C_SMBUS
     } else if ( funcs && I2C_FUNC_SMBUS_WORD_DATA ){
-        if(i2c_smbus_write_byte(devicef, buf[0] ) == -1){                //# write one byte to device
+        if(i2c_smbus_write_byte(devicef, buf[0] ) < 0){                //# write one byte to device
             fprintf (stderr, "I2C write error: [NO: %d, MSG: %s] at %s, line %d. (function: %s)\n", errno, strerror(errno), __FILE__, __LINE__, __func__);
         }
         usleep(waitlen*1000);                                //# Wait 10ms for reading
-        if((data = i2c_smbus_read_word_data(devicef, buf[0])) == -1) {                //# read the result
+        if((data = i2c_smbus_read_word_data(devicef, buf[0])) < 0) {                //# read the result
             fprintf (stderr, "I2C read error: [NO: %d, MSG: %s] at %s, line %d. (function: %s)\n", errno, strerror(errno), __FILE__, __LINE__, __func__);
         } else {
             buf[0] = data & 0x0FF;
@@ -166,9 +166,9 @@ int main( int argc, char *argv[] ){
         if( argc > 4 ){                        //If not get_info was called
             if(argv[4][0]=='0' && argv[4][1]=='x'){                         //# Hexadecimal representetion of device address
 
-                addr = (int)strtol(argv[4], NULL, 0);                  //# strtol() is working with hex-string correctly
+                addr = (long)strtol(argv[4], NULL, 0);                  //# strtol() is working with hex-string correctly
 
-                if (ioctl(devicef, I2C_SLAVE, addr) < 0){                    //# Seeking/Opening the device on the Bus
+                if (ioctl(devicef, I2C_SLAVE_FORCE, addr) < 0){                    //# Seeking/Opening the device on the Bus
                     //printf("\n\tCan't open i2c DEVICE, errno: %d\n\n",errno);
                     fprintf (stderr, "\n\tCan't open i2c DEVICE!  [ERR: %d, MSG: %s] at %s, line %d. \n", errno, strerror(errno), __FILE__, __LINE__);
                     exit(EXIT_FAILURE);
-- 
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