diff options
Diffstat (limited to 'makedevs.c')
| -rw-r--r-- | makedevs.c | 19 |
1 files changed, 15 insertions, 4 deletions
diff --git a/makedevs.c b/makedevs.c index 5948bacc8..c8206e020 100644 --- a/makedevs.c +++ b/makedevs.c @@ -17,10 +17,18 @@ #include <sys/stat.h> static 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"; + "makedevs NAME TYPE MAJOR MINOR FIRST LAST [s]\n\n" + "Creates 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"; int makedevs_main(int argc, char **argv) { @@ -38,6 +46,9 @@ int makedevs_main(int argc, char **argv) char devname[255]; char buf[255]; + if (argc < 7 || *argv[1]=='-') + usage(makedevs_usage); + switch (type[0]) { case 'c': mode = S_IFCHR; |