Added a rule to make tags files for vi(m).

[oweals/busybox.git] / makedevs.c

diff --git a/makedevs.c b/makedevs.c
index 00f0066ff5ff9b42e2aa7b85f66c992f7969aabf..5072095b532cab61e67ed556ed428e17c3283996 100644 (file)
--- a/makedevs.c
+++ b/makedevs.c
@@ -1,3 +1,4 @@
+/* vi: set sw=4 ts=4: */
 /*
  * public domain -- Dave 'Kill a Cop' Cinege <dcinege@psychosis.com>
  * 
@@ -5,7 +6,7 @@
  * Make ranges of device files quickly. 
  * known bugs: can't deal with alpha ranges
  */
- 
+
 #include "internal.h"
 #include <stdio.h>
 #include <stdlib.h>
@@ -15,61 +16,78 @@
 #include <sys/types.h>
 #include <sys/stat.h>
 
-const char makedevs_usage[] = 
-"makedevs 0.01 -- Create an entire range of device files\n\n"
-"\tmakedevs /dev/ttyS c 4 64 0 63        (ttyS0-ttyS63)\n"
-"\tmakedevs /dev/hda b 3 0 0 8 s         (hda,hda1-hda8)\n";
+static const char makedevs_usage[] =
+       "makedevs NAME TYPE MAJOR MINOR FIRST LAST [s]\n"
+#ifndef BB_FEATURE_TRIVIAL_HELP
+       "\nCreates a range of block or character special files\n\n"
+       "TYPEs include:\n"
+       "\tb:\tMake a block (buffered) device.\n"
+       "\tc or u:\tMake a character (un-buffered) device.\n"
+       "\tp:\tMake a named pipe. MAJOR and MINOR are ignored for named pipes.\n\n"
+       "FIRST specifies the number appended to NAME to create the first device.\n"
+       "LAST specifies the number of the last item that should be created.\n"
+       "If 's' is the last argument, the base device is created as well.\n\n"
+       "For example:\n"
+       "\tmakedevs /dev/ttyS c 4 66 2 63   ->  ttyS2-ttyS63\n"
+       "\tmakedevs /dev/hda b 3 0 0 8 s    ->  hda,hda1-hda8\n"
+#endif
+       ;
 
-int
-makedevs_main(int argc, char * * argv)
+int makedevs_main(int argc, char **argv)
 {
 
-const char *basedev = argv[1];
-const char *type = argv[2];
-int major = atoi(argv[3]);
-int Sminor = atoi(argv[4]);
-int S = atoi(argv[5]);
-int E = atoi(argv[6]);
-int sbase = argc == 8 ? 1 : 0;
+       const char *basedev = argv[1];
+       const char *type = argv[2];
+       int major = atoi(argv[3]);
+       int Sminor = atoi(argv[4]);
+       int S = atoi(argv[5]);
+       int E = atoi(argv[6]);
+       int sbase = argc == 8 ? 1 : 0;
+
+       mode_t mode = 0;
+       dev_t dev = 0;
+       char devname[255];
+       char buf[255];
 
-mode_t mode = 0;
-dev_t dev = 0;
-char devname[255];
-char buf[255];
+       if (argc < 7 || *argv[1]=='-')
+               usage(makedevs_usage);
 
        switch (type[0]) {
-               case 'c':
-                       mode = S_IFCHR; break;
-               case 'b':
-                       mode = S_IFBLK; break;
-               case 'f':
-                       mode = S_IFIFO; break;
-               default:
-                       fprintf(stderr, "Usage: %s\n", makedevs_usage);
-                       return 2;
-       }       
-       mode |= 0660; 
-
-       while ( S <= E ) {
-                       
+       case 'c':
+               mode = S_IFCHR;
+               break;
+       case 'b':
+               mode = S_IFBLK;
+               break;
+       case 'f':
+               mode = S_IFIFO;
+               break;
+       default:
+               usage(makedevs_usage);
+       }
+       mode |= 0660;
+
+       while (S <= E) {
+
                if (type[0] != 'f')
                        dev = (major << 8) | Sminor;
                strcpy(devname, basedev);
-               
+
                if (sbase == 0) {
-                       sprintf(buf, "%d", S); 
+                       sprintf(buf, "%d", S);
                        strcat(devname, buf);
                } else {
                        sbase = 0;
                }
-                               
-               if (mknod (devname, mode, dev))
-                       printf("Failed to create: %s\n", devname);              
-       
-               S++; Sminor++;
+
+               if (mknod(devname, mode, dev))
+                       printf("Failed to create: %s\n", devname);
+
+               S++;
+               Sminor++;
        }
 
-return 0;
+       return 0;
 }
 
 /*