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- GETGRENT C Library Procedures GETGRENT
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- NNAAMMEE
- getgrent, getgrgid, getgrnam, setgrent, endgrent setgrfile -
- get group file entry
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- SSYYNNOOPPSSIISS
- ##iinncclluuddee <<ggrrpp..hh>>
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- ssttrruucctt ggrroouupp **ggeettggrreenntt(())
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- ssttrruucctt ggrroouupp **ggeettggrrggiidd((ggiidd))
- iinntt ggiidd;;
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- ssttrruucctt ggrroouupp **ggeettggrrnnaamm((nnaammee))
- cchhaarr **nnaammee;;
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- sseettggrreenntt(())
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- eennddggrreenntt(())
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- sseettggrrffiillee((nnaammee))
- cchhaarr **nnaammee;;
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- DDEESSCCRRIIPPTTIIOONN
- _G_e_t_g_r_e_n_t, _g_e_t_g_r_g_i_d and _g_e_t_g_r_n_a_m each return pointers to an
- object with the following structure containing the broken-
- out fields of a line in the group file.
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- /* @(#)grp.h 1.1 86/07/07 SMI; from UCB 4.1 83/05/03 */
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- struct group { /* see getgrent(3) */
- char *gr_name;
- char *gr_passwd;
- int gr_gid;
- char **gr_mem;
- };
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- struct group *getgrent(), *getgrgid(), *getgrnam();
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- The members of this structure are:
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- gr_name The name of the group.
- gr_passwd The encrypted password of the group.
- gr_gid The numerical group-ID.
- gr_mem Null-terminated vector of pointers to the indivi-
- dual member names.
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- _G_e_t_g_r_e_n_t simply reads the next line while _g_e_t_g_r_g_i_d and _g_e_t_-
- _g_r_n_a_m search until a matching _g_i_d or _n_a_m_e is found (or until
- EOF is encountered). Each routine picks up where the others
- leave off so successive calls may be used to search the
- entire file.
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- Sprite v1.0 November 5, 1987 1
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- GETGRENT C Library Procedures GETGRENT
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- A call to _s_e_t_g_r_e_n_t has the effect of rewinding the group
- file to allow repeated searches. _E_n_d_g_r_e_n_t may be called to
- close the group file when processing is complete.
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- _S_e_t_g_r_f_i_l_e changes the default group file to _n_a_m_e thus allow-
- ing alternate grioup files to be used. Note that it does
- _n_o_t close the previous file. If this is desired, _e_n_d_g_r_e_n_t
- should be called prior to it.
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- FFIILLEESS
- /etc/group
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- SSEEEE AALLSSOO
- getlogin(3), getpwent(3), group(5)
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- DDIIAAGGNNOOSSTTIICCSS
- A null pointer (0) is 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.
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- Sprite v1.0 November 5, 1987 2
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