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Annotation of 43BSDTahoe/lib/libc/gen/getpwent.c, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Copyright (c) 1984 Regents of the University of California.
                      3:  * All rights reserved.  The Berkeley software License Agreement
                      4:  * specifies the terms and conditions for redistribution.
                      5:  */
                      6: 
                      7: #if defined(LIBC_SCCS) && !defined(lint)
                      8: static char sccsid[] = "@(#)getpwent.c 5.2 (Berkeley) 3/9/86";
                      9: #endif LIBC_SCCS and not lint
                     10: 
                     11: #include <stdio.h>
                     12: #include <pwd.h>
                     13: #include <ndbm.h>
                     14: 
                     15: static char EMPTY[] = "";
                     16: static FILE *pwf = NULL;
                     17: static char line[BUFSIZ+1];
                     18: static struct passwd passwd;
                     19: 
                     20: /*
                     21:  * The following are shared with getpwnamuid.c
                     22:  */
                     23: char   *_pw_file = "/etc/passwd";
                     24: DBM    *_pw_db;
                     25: int    _pw_stayopen;
                     26: 
                     27: setpwent()
                     28: {
                     29:        if (pwf == NULL)
                     30:                pwf = fopen(_pw_file, "r");
                     31:        else
                     32:                rewind(pwf);
                     33: }
                     34: 
                     35: endpwent()
                     36: {
                     37:        if (pwf != NULL) {
                     38:                fclose(pwf);
                     39:                pwf = NULL;
                     40:        }
                     41:        if (_pw_db != (DBM *)0) {
                     42:                dbm_close(_pw_db);
                     43:                _pw_db = (DBM *)0;
                     44:                _pw_stayopen = 0;
                     45:        }
                     46: }
                     47: 
                     48: static char *
                     49: pwskip(p)
                     50: register char *p;
                     51: {
                     52:        while (*p && *p != ':' && *p != '\n')
                     53:                ++p;
                     54:        if (*p)
                     55:                *p++ = 0;
                     56:        return(p);
                     57: }
                     58: 
                     59: struct passwd *
                     60: getpwent()
                     61: {
                     62:        register char *p;
                     63: 
                     64:        if (pwf == NULL) {
                     65:                if ((pwf = fopen( _pw_file, "r" )) == NULL)
                     66:                        return(0);
                     67:        }
                     68:        p = fgets(line, BUFSIZ, pwf);
                     69:        if (p == NULL)
                     70:                return(0);
                     71:        passwd.pw_name = p;
                     72:        p = pwskip(p);
                     73:        passwd.pw_passwd = p;
                     74:        p = pwskip(p);
                     75:        passwd.pw_uid = atoi(p);
                     76:        p = pwskip(p);
                     77:        passwd.pw_gid = atoi(p);
                     78:        passwd.pw_quota = 0;
                     79:        passwd.pw_comment = EMPTY;
                     80:        p = pwskip(p);
                     81:        passwd.pw_gecos = p;
                     82:        p = pwskip(p);
                     83:        passwd.pw_dir = p;
                     84:        p = pwskip(p);
                     85:        passwd.pw_shell = p;
                     86:        while (*p && *p != '\n')
                     87:                p++;
                     88:        *p = '\0';
                     89:        return(&passwd);
                     90: }
                     91: 
                     92: setpwfile(file)
                     93:        char *file;
                     94: {
                     95:        _pw_file = file;
                     96: }

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