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Annotation of researchv10dc/man/adm/man3/getgrent.3, revision 1.1.1.1

1.1       root        1: .TH GETGRENT 3
                      2: .CT 2 secur
                      3: .SH NAME
                      4: getgrent, getgrgid, getgrnam, setgrent, endgrent \(mi get group file entry
                      5: .SH SYNOPSIS
                      6: .nf
                      7: .B #include <grp.h>
                      8: .PP
                      9: .B struct group *getgrent();
                     10: .PP
                     11: .B struct group *getgrgid(gid)
                     12: .PP
                     13: .B struct group *getgrnam(name)
                     14: .B char *name;
                     15: .PP
                     16: .B int setgrent();
                     17: .PP
                     18: .B int endgrent();
                     19: .fi
                     20: .SH DESCRIPTION
                     21: .I Getgrent,
                     22: .I getgrgid
                     23: and
                     24: .I getgrnam
                     25: each return pointers
                     26: to a structure
                     27: containing the broken-out
                     28: fields of a line in
                     29: .FR /etc/group .
                     30: .EX
                     31: .ta \w'struct 'u +\w'group 'u +\w'*gr_passwd; 'u
                     32: struct group   {
                     33:        \fLchar *gr_name;\fR    the group name
                     34:        \fLchar *gr_passwd;\fP  the encrypted group passwd
                     35:        \fLint  gr_gid;\fP      the numeric groupid
                     36:        \fLchar **gr_mem;\fP    null-terminated vector of pointers to the individual member names
                     37: \fL};\fP
                     38: .EE
                     39: .PP
                     40: .I Getgrent
                     41: simply reads the next
                     42: line while
                     43: .I getgrgid
                     44: and
                     45: .I getgrnam
                     46: search until a matching
                     47: .I gid
                     48: or
                     49: .I name
                     50: is found
                     51: (or until EOF is encountered).
                     52: Each routine picks up
                     53: where the others leave off
                     54: so successive calls may be used
                     55: to search the entire file.
                     56: .PP
                     57: A call to
                     58: .I setgrent
                     59: has the effect of rewinding
                     60: the group file
                     61: to allow
                     62: repeated searches.
                     63: .I Endgrent
                     64: may be called to
                     65: close the group file
                     66: when processing is complete.
                     67: .SH FILES
                     68: .TP
                     69: .F /etc/group
                     70: .SH "SEE ALSO"
                     71: .IR getlogin (3), 
                     72: .IR getpwent (3), 
                     73: .IR passwd (5)
                     74: .SH DIAGNOSTICS
                     75: Zero is returned on EOF
                     76: or error.
                     77: .SH BUGS
                     78: The return values point to static data
                     79: whose content is overwritten by each call.

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