NAME
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NAME
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getservent, getservbyname, getservbyport - get service entry
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getservent, getservbyname, getservbyport - get service entry
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SYNOPSIS
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SYNOPSIS
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#include <network.h>
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#include <network.h>
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struct servent *getservbyname(const char *name, const char *proto);
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struct servent *getservbyname(const char *name, const char *proto);
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struct servent *getservbyport(int port, const char *proto);
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struct servent *getservbyport(int port, const char *proto);
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DESCRIPTION
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DESCRIPTION
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The getservbyname() function returns a servent structure
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The getservbyname() function returns a servent structure
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for the line from /etc/services that matches the service
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for the line from /etc/services that matches the service
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name using protocol proto.
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name using protocol proto.
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The getservbyport() function returns a servent structure
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The getservbyport() function returns a servent structure
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for the line that matches the port port given in network
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for the line that matches the port port given in network
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byte order using protocol proto.
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byte order using protocol proto.
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The servent structure is defined in <netdb.h> as follows:
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The servent structure is defined in <netdb.h> as follows:
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struct servent {
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struct servent {
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char *s_name; /* official service name */
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char *s_name; /* official service name */
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char **s_aliases; /* alias list */
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char **s_aliases; /* alias list */
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int s_port; /* port number */
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int s_port; /* port number */
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char *s_proto; /* protocol to use */
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char *s_proto; /* protocol to use */
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}
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}
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The members of the servent structure are:
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The members of the servent structure are:
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s_name The official name of the service.
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s_name The official name of the service.
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s_aliases
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s_aliases
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A zero terminated list of alternative names for the
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A zero terminated list of alternative names for the
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service.
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service.
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s_port The port number for the service given in network
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s_port The port number for the service given in network
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byte order.
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byte order.
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s_proto
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s_proto
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The name of the protocol to use with this service.
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The name of the protocol to use with this service.
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RETURN VALUE
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RETURN VALUE
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The getservbyname() and getservbyport()
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The getservbyname() and getservbyport()
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functions return the servent structure, or a NULL pointer
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functions return the servent structure, or a NULL pointer
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if an error occurs.
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if an error occurs.
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