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Annotation of 40BSD/cmd/csh/getpwent.c, revision 1.1.1.1

1.1       root        1: static char *sccsid = "@(#)getpwent.c 4.1 10/9/80";
                      2: 
                      3: #include <pwd.h>
                      4: 
                      5: #define        BUFSIZ  160
                      6: 
                      7: static int pwf = -1;
                      8: static char line[BUFSIZ+1];
                      9: static struct passwd passwd;
                     10: 
                     11: setpwent()
                     12: {
                     13:        if( pwf == -1 )
                     14:                pwf = open( "/etc/passwd", 0 );
                     15:        else
                     16:                lseek(pwf, 0l, 0);
                     17: }
                     18: 
                     19: endpwent()
                     20: {
                     21:        if( pwf != -1 ){
                     22:                close( pwf );
                     23:                pwf = -1;
                     24:        }
                     25: }
                     26: 
                     27: static char *
                     28: pwskip(p)
                     29: register char *p;
                     30: {
                     31:        while( *p && *p != ':' )
                     32:                ++p;
                     33:        if( *p ) *p++ = 0;
                     34:        return(p);
                     35: }
                     36: 
                     37: struct passwd *
                     38: getpwent()
                     39: {
                     40:        register char *p, *q;
                     41:        register int i, j;
                     42: 
                     43:        if (pwf == -1) {
                     44:                if( (pwf = open( "/etc/passwd", 0 )) == -1 )
                     45:                        return(0);
                     46:        }
                     47:        i = read(pwf, line, BUFSIZ);
                     48:        for (j = 0; j < i; j++)
                     49:                if (line[j] == '\n')
                     50:                        break;
                     51:        if (j >= i)
                     52:                return(0);
                     53:        line[++j] = 0;
                     54:        lseek(pwf, (long) (j - i), 1);
                     55:        p = line;
                     56:        passwd.pw_name = p;
                     57:        p = pwskip(p);
                     58: /*     passwd.pw_passwd = p; */
                     59:        p = q = pwskip(p);
                     60: /*     passwd.pw_uid = atoi(p); */
                     61:        p = pwskip(p);
                     62:        p[-1] = 0;
                     63:        passwd.pw_uid = atou(q);
                     64: /*     passwd.pw_gid = atoi(p); */
                     65: /*     passwd.pw_quota = 0; */
                     66: /*     passwd.pw_comment = ""; */
                     67:        q = p;
                     68:        p = pwskip(p);
                     69:        p[-1] = 0;
                     70:        passwd.pw_gid = atou(q);
                     71: /*     passwd.pw_gecos = p; */
                     72:        p = pwskip(p);
                     73:        passwd.pw_dir = p;
                     74:        p = pwskip(p);
                     75: /*     passwd.pw_shell = p; */
                     76: /*     while(*p && *p != '\n') p++; */
                     77:        *p = '\0';
                     78:        return(&passwd);
                     79: }
                     80: 
                     81: atou(p)
                     82:        register char *p;
                     83: {
                     84:        register int i = 0;
                     85: 
                     86:        if (p != 0)
                     87:                while (*p)
                     88:                        i = i * 10 + *p++ - '0';
                     89:        return (i);
                     90: }

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