GNU/Linux man pages
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Expressions régulières,
Syntaxe et mise en oeuvre :
GNU/Linux |
CentOS 2.1AS(Slurm) |
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endprotoent(3) |
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getprotoent, getprotobyname, getprotobynumber, setprotoent, endprotoent − get protocol entry
#include <netdb.h>
struct protoent *getprotoent(void);
struct protoent *getprotobyname(const char *name);
struct protoent *getprotobynumber(int proto);
void setprotoent(int stayopen);
void endprotoent(void);
The getprotoent() function reads the next line from the file /etc/protocols and returns a structure protoent containing the broken out fields from the line. The /etc/protocols file is opened if necessary.
The getprotobyname() function returns a protoent structure for the line from /etc/protocols that matches the protocol name name.
The getprotobynumber() function returns a protoent structure for the line that matches the protocol number number.
The setprotoent() function opens and rewinds the /etc/protocols file. If stayopen is true (1), then the file will not be closed between calls to getprotobyname() or getprotobynumber().
The endprotoent() function closes /etc/protocols.
The protoent structure is defined in <netdb.h> as follows:
struct protoent {
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char |
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*p_name; |
/* official protocol name */ | ||
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char |
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**p_aliases; |
/* alias list */ | ||
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int |
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p_proto; |
/* protocol number */ |
}
The members of the protoent structure are:
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p_name |
The official name of the protocol. |
p_aliases
A zero terminated list of alternative names for the protocol.
p_proto
The protocol number.
The getprotoent(), getprotobyname() and getprotobynumber() functions return the protoent structure, or a NULL pointer if an error occurs or the end of the file is reached.
/etc/protocols
protocol database file
BSD 4.3
getservent(3), getnetent(3), protocols(5)
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endprotoent(3) | |