Changeset 1053 for lm-sensors/trunk/prog/detect/i2cdetect.c

Timestamp:

03/31/01 21:00:45 (11 years ago)

Author:

mds

Message:

add devfs /dev/i2c/x support

Files:

• lm-sensors/trunk/prog/detect/i2cdetect.c (modified) (3 diffs)

lm-sensors/trunk/prog/detect/i2cdetect.c

@@ -2 +2 @@
     i2cdetect.c - Part of i2cdetect, a user-space program to scan for I2C 
                   devices.
-    Copyright (c) 1999  Frodo Looijaard <frodol@dds.nl>
+    Copyright (c) 1999-2001  Frodo Looijaard <frodol@dds.nl> and
+                             Mark D. Studebaker <mdsxyz123@yahoo.com>
 
     This program is free software; you can redistribute it and/or modify
@@ -46 +47 @@
   char *end;
   int i,j,res,i2cbus,file;
-  int e1, e2;
+  int e1, e2, e3;
   char filename1[20];
   char filename2[20];
+  char filename3[20];
   char *filename;
   long funcs;
@@ -70 +72 @@
   }
 
+/*
+ * Try all three variants and give the correct error message
+ * upon failure
+ */
+
   sprintf(filename1,"/dev/i2c-%d",i2cbus);
   sprintf(filename2,"/dev/i2c%d",i2cbus);
+  sprintf(filename3,"/dev/i2c/%d",i2cbus);
   if ((file = open(filename1,O_RDWR)) < 0) {
     e1 = errno;
     if ((file = open(filename2,O_RDWR)) < 0) {
       e2 = errno;
-      if(e1 == ENOENT && e2 == ENOENT) {
-        fprintf(stderr,"Error: Could not open file `%s' or `%s': %s\n",
-                   filename1,filename2,strerror(ENOENT));
+      if ((file = open(filename3,O_RDWR)) < 0) {
+        e3 = errno;
+        if(e1 == ENOENT && e2 == ENOENT && e3 == ENOENT) {
+          fprintf(stderr,"Error: Could not open file `%s', `%s', or `%s': %s\n",
+                     filename1,filename2,filename3,strerror(ENOENT));
+        }
+        if (e1 != ENOENT) {
+          fprintf(stderr,"Error: Could not open file `%s' : %s\n",
+                     filename1,strerror(e1));
+          if(e1 == EACCES)
+            fprintf(stderr,"Run as root?\n");
+        }
+        if (e2 != ENOENT) {
+          fprintf(stderr,"Error: Could not open file `%s' : %s\n",
+                     filename2,strerror(e2));
+          if(e2 == EACCES)
+            fprintf(stderr,"Run as root?\n");
+        }
+        if (e3 != ENOENT) {
+          fprintf(stderr,"Error: Could not open file `%s' : %s\n",
+                     filename3,strerror(e3));
+          if(e3 == EACCES)
+            fprintf(stderr,"Run as root?\n");
+        }
+        exit(1);
+      } else {
+         filename = filename3;
       }
-      if (e1 != ENOENT) {
-        fprintf(stderr,"Error: Could not open file `%s' : %s\n",
-                   filename1,strerror(e1));
-        if(e1 == EACCES)
-          fprintf(stderr,"Run as root?\n");
-      }
-      if (e2 != ENOENT) {
-        fprintf(stderr,"Error: Could not open file `%s' : %s\n",
-                   filename2,strerror(e2));
-        if(e2 == EACCES)
-          fprintf(stderr,"Run as root?\n");
-      }
-      exit(1);
     } else {
        filename = filename2;