cd_suf(3)cd_suf(3)NAMEcd_suf - read System Use Field from a specified System Use Area on a
Rock Ridge format CD-ROM
SYNOPSIS
#include <sys/cdrom.h>
int cd_suf(
char *path,
int fsec,
char signature[2],
int index,
char *buf,
int buflen );
LIBRARY
CD-ROM library (libcdrom.so, libcdrom.a)
PARAMETERS
Points to a file or directory within the CD-ROM file hierarchy. Speci‐
fies the File Section of that file. The numbering starts with one. If
fsec is set to -1, the System Use Area of the last File Section of that
file is assumed. The 2-byte signature to look for and return from the
System Use Area. The occurrence of signature to return. If signature
is a NULL pointer, returns the System Use Field specified by index
starting from the beginning of the System Use Area. Otherwise, returns
the occurrence of signature specified by index. The index number of the
first System Use Field of any signature is one. The buffer in which to
place the System Use Field. The buffer length of buf.
DESCRIPTION
The cd_suf() function returns a System Use Field in the System Use Area
for path.
RETURN VALUES
The cd_suf() function will return the number of bytes placed in buf if
successful. The cd_suf() function will return 0 if the signature field
is not found. In case of error, -1 is returned and errno is set to
indicate the error.
ERRORS
The cd_suf() function will fail if: Search permission is denied for a
component of the path prefix or read permission on the file or direc‐
tory pointed to by path is denied. The length of the path string
exceeds {PATH_MAX}, or a pathname component is longer than {NAME_MAX}
while {_POSIX_NO_TRUNC} is in effect. A component of path does not
exist or the path argument points to an empty string. The File Section
indicated by fsec has no System Use Area. A component of the path pre‐
fix is not a directory. The address of buf, signature, or path is
invalid. The value of fsec, index, or buflen is invalid. The argument
path points to a file or directory not within a CD-ROM file hierarchy.
The Volume containing the File Section indicated by fsec is not
mounted. The CD-ROM is not in the drive or a read error occurred. A
signal was caught during the cd_suf() function. {OPEN_MAX} file
descriptors are currently open in the calling process.
[Tru64 UNIX] Either the OPEN_MAX value or the per-process soft
descriptor limit is checked. The system file table is full.
SEE ALSO
Commands: cdsuf(1)
Files: <sys/cdrom.h>
cd_suf(3)