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- GETSERVENT C Library Procedures GETSERVENT
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- NNAAMMEE
- getservent, getservbyport, getservbyname, setservent,
- endservent - get service entry
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- SSYYNNOOPPSSIISS
- ##iinncclluuddee <<nneettddbb..hh>>
-
- ssttrruucctt sseerrvveenntt **ggeettsseerrvveenntt(())
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- ssttrruucctt sseerrvveenntt **ggeettsseerrvvbbyynnaammee((nnaammee,, pprroottoo))
- cchhaarr **nnaammee,, **pprroottoo;;
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- ssttrruucctt sseerrvveenntt **ggeettsseerrvvbbyyppoorrtt((ppoorrtt,, pprroottoo))
- iinntt ppoorrtt;; cchhaarr **pprroottoo;;
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- sseettsseerrvveenntt((ssttaayyooppeenn))
- iinntt ssttaayyooppeenn
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- eennddsseerrvveenntt(())
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- DDEESSCCRRIIPPTTIIOONN
- _G_e_t_s_e_r_v_e_n_t, _g_e_t_s_e_r_v_b_y_n_a_m_e, and _g_e_t_s_e_r_v_b_y_p_o_r_t each return a
- pointer to an object with the following structure containing
- the broken-out fields of a line in the network services data
- base, /_e_t_c/_s_e_r_v_i_c_e_s.
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- struct servent {
- char *s_name; /* official name of service */
- char **s_aliases; /* alias list */
- int s_port; /* port service resides at */
- char *s_proto; /* protocol to use */
- };
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- The members of this structure are:
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- s_name The official name of the service.
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- s_aliases A zero terminated list of alternate names for the
- service.
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- s_port The port number at which the service resides.
- Port numbers are returned in network byte order.
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- s_proto The name of the protocol to use when contacting
- the service.
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- _G_e_t_s_e_r_v_e_n_t reads the next line of the file, opening the file
- if necessary.
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- _S_e_t_s_e_r_v_e_n_t opens and rewinds the file. If the _s_t_a_y_o_p_e_n flag
- is non-zero, the net data base will not be closed after each
- call to _g_e_t_s_e_r_v_b_y_n_a_m_e or .IR getservbyport .
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- Sprite v1.0 May 19, 1986 1
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- GETSERVENT C Library Procedures GETSERVENT
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- _E_n_d_s_e_r_v_e_n_t closes the file.
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- _G_e_t_s_e_r_v_b_y_n_a_m_e and _g_e_t_s_e_r_v_b_y_p_o_r_t sequentially search from the
- beginning of the file until a matching protocol name or port
- number is found, or until EOF is encountered. If a protocol
- name is also supplied (non-NULL), searches must also match
- the protocol.
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- FFIILLEESS
- /etc/services
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- SSEEEE AALLSSOO
- getprotoent(3N), services(5)
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- DDIIAAGGNNOOSSTTIICCSS
- Null pointer (0) returned on EOF or error.
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- BBUUGGSS
- All information is contained in a static area so it must be
- copied if it is to be saved. Expecting port numbers to fit
- in a 32 bit quantity is probably naive.
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- Sprite v1.0 May 19, 1986 2
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