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Full Discussion: read system call
Top Forums Programming read system call Post 31993 by Madhu Babu on Saturday 16th of November 2002 05:08:07 AM
Old 11-16-2002
read system call

When i read 4 bytes from a socket the read function returns 0 value. what does it mean?
How should i know whether a message is available in the socket or not?
 

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SCTP_GENERIC_RECVMSG(2) 				      BSD System Calls Manual					   SCTP_GENERIC_RECVMSG(2)

NAME
sctp_generic_recvmsg -- receive data from a peer LIBRARY
Standard C Library (libc, -lc) SYNOPSIS
#include <sys/types.h> #include <sys/socket.h> #include <netinet/sctp.h> int sctp_generic_recvmsg(int s, struct iovec *iov, int iovlen, struct sockaddr *from, socklen_t *fromlen, struct sctp_sndrcvinfo *sinfo, int *msgflags); DESCRIPTION
sctp_generic_recvmsg() is the true system call used by the sctp_recvmsg(3) function call. This call is more efficient since it is a true system call but it is specific to FreeBSD and can be expected not to be present on any other operating system. For detailed usage please see the sctp_recvmsg(3) function call. RETURN VALUES
The call returns the number of bytes read on success and -1 upon failure. ERRORS
[EBADF] The argument s is not a valid descriptor. [ENOTSOCK] The argument s is not a socket. SEE ALSO
sctp_recvmsg(3), sctp(4) BSD
October 30, 2007 BSD
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