getdevmajor(3) - NetBSD Manual Pages

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GETDEVMAJOR(3)          NetBSD Library Functions Manual         GETDEVMAJOR(3)


NAME
getdevmajor -- get block or character device major number
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <stdlib.h> #include <sys/stat.h> devmajor_t getdevmajor(const char *name, mode_t type);
DESCRIPTION
The getdevmajor() function returns the major device number of the block or character device specified by name and a file type matching the one encoded in type which must be one of S_IFBLK or S_IFCHR.
RETURN VALUES
If no device matches the specified values, no information is available, or an error occurs, NODEVMAJOR is returned and errno is set to indicate the error.
EXAMPLES
To retrieve the major number for pty(4) slave devices (aka pts devices): #include <stdlib.h> #include <sys/stat.h> devmajor_t pts; pts = getdevmajor("pts", S_IFCHR); To retrieve the major numbers for the block and character wd(4) devices: #include <stdlib.h> #include <sys/stat.h> devmajor_t c, b; c = getdevmajor("wd", S_IFCHR); b = getdevmajor("wd", S_IFBLK);
ERRORS
The getdevmajor() function may fail and set errno for any of the errors specified for the library functions malloc(3) and sysctlbyname(3). In addition, the following errors may be reported: [EINVAL] The value of the type argument is not S_IFCHR or S_IFBLK. [ENOENT] The named device is not found.
SEE ALSO
stat(2), devname(3), malloc(3), sysctlbyname(3)
HISTORY
The getdevmajor() function call appeared in NetBSD 3.0. NetBSD 9.0 January 20, 2009 NetBSD 9.0
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