GNU/Linux man pages
Livre :
Expressions régulières,
Syntaxe et mise en oeuvre :
GNU/Linux |
RedHat 5.2(Apollo) |
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setservent(3) |
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getservent, getservbyname, getservbyport, setservent, endservent − get service entry
#include <netdb.h>
struct servent *getservent(void);
struct servent *getservbyname(const char *name, const char *proto);
struct servent *getservbyport(int port, const char *proto);
void setservent(int stayopen);
void endservent(void);
The getservent() function reads the next line from the file /etc/services and returns a structure servent containing the broken out fields from the line. The /etc/services file is opened if necessary.
The getservbyname() function returns a servent structure for the line from /etc/services that matches the service name using protocol proto.
The getservbyport() function returns a servent structure for the line that matches the port port given in network byte order using protocol proto.
The setservent() function opens and rewinds the /etc/services file. If stayopen is true (1), then the file will not be closed between calls to getservbyname() and getservbyport().
The endservent() function closes /etc/services.
The servent structure is defined in <netdb.h> as follows:
struct servent {
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char |
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*s_name; |
/* official service name */ | ||
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char |
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**s_aliases; |
/* alias list */ | ||
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int |
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s_port; |
/* port number */ | ||
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char |
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*s_proto; |
/* protocol to use */ |
}
The members of the servent structure are:
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s_name |
The official name of the service. |
s_aliases
A zero terminated list of alternative names for the service.
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s_port |
The port number for the service given in network byte order. |
s_proto
The name of the protocol to use with this service.
The getservent(), getservbyname() and getservbyport() functions return the servent structure, or a NULL pointer if an error occurs or the end of the file is reached.
/etc/services
services database file
BSD 4.3
getprotoent(3), getnetent(3), services(5)
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setservent(3) | |