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Annotation of coherent/g/usr/bin/pax/port.c, revision 1.1

1.1     ! root        1: /* $Source: /src386/usr/bin/pax/port.c,v $
        !             2:  *
        !             3:  * $Revision: 1.1 $
        !             4:  *
        !             5:  * port.c - These are routines not available in all environments. 
        !             6:  *
        !             7:  * DESCRIPTION
        !             8:  *
        !             9:  *     The routines contained in this file are provided for portability to
        !            10:  *     other versions of UNIX or other operating systems (e.g. MSDOS).
        !            11:  *     Not all systems have the same functions or the same semantics,
        !            12:  *     these routines attempt to bridge the gap as much as possible.
        !            13:  *
        !            14:  * AUTHOR
        !            15:  *
        !            16:  *     Mark H. Colburn, NAPS International ([email protected])
        !            17:  *     John Gilmore (gnu@hoptoad)
        !            18:  *
        !            19:  * Sponsored by The USENIX Association for public distribution. 
        !            20:  *
        !            21:  * Copyright (c) 1989 Mark H. Colburn.
        !            22:  * All rights reserved.
        !            23:  *
        !            24:  * Redistribution and use in source and binary forms are permitted
        !            25:  * provided that the above copyright notice is duplicated in all such 
        !            26:  * forms and that any documentation, advertising materials, and other 
        !            27:  * materials related to such distribution and use acknowledge that the 
        !            28:  * software was developed * by Mark H. Colburn and sponsored by The 
        !            29:  * USENIX Association. 
        !            30:  *
        !            31:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
        !            32:  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
        !            33:  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        !            34:  *
        !            35:  * $Log:       port.c,v $
        !            36:  * Revision 1.1  92/08/28  08:02:56  bin
        !            37:  * Initial revision
        !            38:  * 
        !            39:  * Revision 1.1  89/02/14  16:48:39  jep
        !            40:  * Initial revision
        !            41:  * 
        !            42:  * Revision 1.1  88/12/23  18:02:29  mark
        !            43:  * Initial revision
        !            44:  * 
        !            45:  */
        !            46: 
        !            47: #ifndef lint
        !            48: static char *ident = "$Id: port.c,v 1.1 92/08/28 08:02:56 bin Exp Locker: bin $";
        !            49: static char *copyright = "Copyright (c) 1989 Mark H. Colburn.\nAll rights reserved.\n";
        !            50: #endif /* ! lint */
        !            51: 
        !            52: 
        !            53: /* Headers */
        !            54: 
        !            55: #include "pax.h"
        !            56: 
        !            57: 
        !            58: /*
        !            59:  * Some computers are not so crass as to align themselves into the BSD or USG
        !            60:  * camps.  If a system supplies all of the routines we fake here, add it to
        !            61:  * the list in the #if !defined()'s below and it'll all be skipped. 
        !            62:  */
        !            63: 
        !            64: #if !defined(mc300) && !defined(mc500) && !defined(mc700) && !defined(BSD)
        !            65: 
        !            66: /* mkdir - make a directory
        !            67:  *
        !            68:  * DESCRIPTION
        !            69:  *
        !            70:  *     Mkdir will make a directory of the name "dpath" with a mode of
        !            71:  *     "dmode".  This is consistent with the BSD mkdir() function and the
        !            72:  *     P1003.1 definitions of MKDIR.
        !            73:  *
        !            74:  * PARAMETERS
        !            75:  *
        !            76:  *     dpath           - name of directory to create
        !            77:  *     dmode           - mode of the directory
        !            78:  *
        !            79:  * RETURNS
        !            80:  *
        !            81:  *     Returns 0 if the directory was successfully created, otherwise a
        !            82:  *     non-zero return value will be passed back to the calling function
        !            83:  *     and the value of errno should reflect the error.
        !            84:  */
        !            85: 
        !            86: #if __STDC__
        !            87: 
        !            88: int mkdir(char *dpath, int dmode)
        !            89: 
        !            90: #else
        !            91:     
        !            92: int mkdir(dpath, dmode)
        !            93: char           *dpath;
        !            94: int             dmode;
        !            95: 
        !            96: #endif
        !            97: {
        !            98:     int             cpid, status;
        !            99:     Stat            statbuf;
        !           100:     extern int      errno;
        !           101: 
        !           102:     if (STAT(dpath, &statbuf) == 0) {
        !           103:        errno = EEXIST;         /* Stat worked, so it already exists */
        !           104:        return (-1);
        !           105:     }
        !           106:     /* If stat fails for a reason other than non-existence, return error */
        !           107:     if (errno != ENOENT)
        !           108:        return (-1);
        !           109: 
        !           110:     switch (cpid = fork()) {
        !           111: 
        !           112:     case -1:                   /* Error in fork() */
        !           113:        return (-1);            /* Errno is set already */
        !           114: 
        !           115:     case 0:                    /* Child process */
        !           116: 
        !           117:        status = umask(0);      /* Get current umask */
        !           118:        status = umask(status | (0777 & ~dmode));       /* Set for mkdir */
        !           119:        execl("/bin/mkdir", "mkdir", dpath, (char *) 0);
        !           120:        _exit(-1);              /* Can't exec /bin/mkdir */
        !           121: 
        !           122:     default:                   /* Parent process */
        !           123:        while (cpid != wait(&status)) {
        !           124:            /* Wait for child to finish */
        !           125:        }
        !           126:     }
        !           127: 
        !           128:     if (TERM_SIGNAL(status) != 0 || TERM_VALUE(status) != 0) {
        !           129:        errno = EIO;            /* We don't know why, but */
        !           130:        return (-1);            /* /bin/mkdir failed */
        !           131:     }
        !           132:     return (0);
        !           133: }
        !           134: 
        !           135: 
        !           136: /* rmdir - remove a directory
        !           137:  *
        !           138:  * DESCRIPTION
        !           139:  *
        !           140:  *     Rmdir will remove the directory specified by "dpath".  It is
        !           141:  *     consistent with the BSD and POSIX rmdir functions.
        !           142:  *
        !           143:  * PARAMETERS
        !           144:  *
        !           145:  *     dpath           - name of directory to remove
        !           146:  *
        !           147:  * RETURNS
        !           148:  *
        !           149:  *     Returns 0 if the directory was successfully deleted, otherwise a
        !           150:  *     non-zero return value will be passed back to the calling function
        !           151:  *     and the value of errno should reflect the error.
        !           152:  */
        !           153: 
        !           154: #if __STDC__
        !           155: 
        !           156: int rmdir(char *dpath)
        !           157: 
        !           158: #else
        !           159:     
        !           160: int rmdir(dpath)
        !           161: char           *dpath;
        !           162: 
        !           163: #endif
        !           164: {
        !           165:     int             cpid, status;
        !           166:     Stat            statbuf;
        !           167:     extern int      errno;
        !           168: 
        !           169:     /* check to see if it exists */
        !           170:     if (STAT(dpath, &statbuf) == -1) {
        !           171:        return (-1);
        !           172:     }
        !           173:     switch (cpid = fork()) {
        !           174: 
        !           175:     case -1:                   /* Error in fork() */
        !           176:        return (-1);            /* Errno is set already */
        !           177: 
        !           178:     case 0:                    /* Child process */
        !           179:        execl("/bin/rmdir", "rmdir", dpath, (char *) 0);
        !           180:        _exit(-1);              /* Can't exec /bin/rmdir */
        !           181: 
        !           182:     default:                   /* Parent process */
        !           183:        while (cpid != wait(&status)) {
        !           184:            /* Wait for child to finish */
        !           185:        }
        !           186:     }
        !           187: 
        !           188:     if (TERM_SIGNAL(status) != 0 || TERM_VALUE(status) != 0) {
        !           189:        errno = EIO;            /* We don't know why, but */
        !           190:        return (-1);            /* /bin/rmdir failed */
        !           191:     }
        !           192:     return (0);
        !           193: }
        !           194: 
        !           195: #endif /* MASSCOMP, BSD */

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