return--0

pkg-config (1)       - Return metainformation about installed libraries
pkg-config (1)       - Return metainformation about installed libraries
1 DBI::Const::GetInfoReturn (3pm) [DBI::Const::GetInfoReturn] - Data and functions for describing GetInfo results
aio_return (3)       - get return status of asynchronous I/O operation
BIO_set_mem_eof_return (3ssl) - memory BIO
DBI::Const::GetInfoReturn (3pm) - Data and functions for describing GetInfo results
File::Temp (3perl)   - return name and handle of a temporary file safely
fsck.nfs (8)         - Dummy fsck.nfs script that always returns success.
ftime (3)            - return date and time
htstat (1)           - returns statistics on the document and word databases, much like the -s option to htdig or htmerge.
iruserok (3)         - routines for returning a stream to a remote command
lookup_dcookie (2)   - return a directory entry's path
nan (3)              - return 'Not a Number'
nanf (3)             - return 'Not a Number'
nanl (3)             - return 'Not a Number'
pkg-config (1)       - Return metainformation about installed libraries
rcmd (3)             - routines for returning a stream to a remote command
realpath (3)         - return the canonicalized absolute pathname
rrdfirst (1)         - Return the date of the first data sample in an RRA within an RRD
rrdlast (1)          - Return the date of the last data sample in an RRD
rresvport (3)        - routines for returning a stream to a remote command
rt_sigreturn (2) [undocumented] - undocumented system calls
ruserok (3)          - routines for returning a stream to a remote command
sigreturn (2)        - return from signal handler and cleanup stack frame
stpcpy (3)           - copy a string returning a pointer to its end
stpncpy (3)          - copy a fixed-size string, returning a pointer to its end
strerror (3)         - return string describing error code
strerror_r (3)       - return string describing error code
strsignal (3)        - return string describing signal
sysinfo (2)          - returns information on overall system statistics
telldir (3)          - return current location in directory stream
ttyname (3)          - return name of a terminal
ttyname_r (3)        - return name of a terminal
vacation (1)         - return I am not here indication
volname (1)          - return volume name
wcpcpy (3)           - copy a wide character string, returning a pointer to its end
wcpncpy (3)          - copy a fixed-size string of wide characters, returning a pointer to its end