Liren Large Software Subsidy 7/07.iso/c/c019/1.ddi/ARC521_C/ARCDOS.C

C/C++ Source or Header | 1988-08-01 | 4.9 KB | 219 lines

/*
 * $Header: arcdos.c,v 1.5 88/06/13 00:40:49 hyc Locked $
 */

/*
 * ARC - Archive utility - ARCDOS
 *
 * Version 1.44, created on 07/25/86 at 14:17:38
 *
 * (C) COPYRIGHT 1985 by System Enhancement Associates; ALL RIGHTS RESERVED
 *
 * By:  Thom Henderson
 *
 * Description: This file contains certain DOS level routines that assist in
 * doing fancy things with an archive, primarily reading and setting the date
 * and time last modified.
 *
 * These are, by nature, system dependant functions.  But they are also, by
 * nature, very expendable.
 *
 * Language: Computer Innovations Optimizing C86
 */
#include <stdio.h>
#include "arc.h"

#if    MSDOS
#include "fileio2.h"        /* needed for filehand */
#endif

#if    UNIX
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/time.h>
#include "tws.h"
#endif

#if    SYSV
struct timeval {
    long tv_sec;
    long tv_usec;
};
#endif

#if    GEMDOS
#include <osbind.h>
#endif

char    *strcpy(), *strcat(), *malloc();

void
getstamp(f, date, time)        /* get a file's date/time stamp */
#if    !MTS
    FILE           *f;    /* file to get stamp from */
#else
    char           *f;    /* filename "" "" */
#endif
    unsigned short   *date, *time;    /* storage for the stamp */
{
#if    MSDOS
    struct {
        int             ax, bx, cx, dx, si, di, ds, es;
    }               reg;

    reg.ax = 0x5700;    /* get date/time */
    reg.bx = filehand(f);    /* file handle */
    if (sysint21(®, ®) & 1)    /* DOS call */
        printf("Get timestamp fail (%d)\n", reg.ax);

    *date = reg.dx;        /* save date/time */
    *time = reg.cx;
#endif
#if    GEMDOS
    int    fd, ret[2];

    fd = fileno(f);
    Fdatime(ret, fd, 0);
    *date = ret[1];
    *time = ret[0];
#endif
#if    UNIX
    char           *ctime();
    struct stat    *buf;
    int             day, hr, min, sec, yr, imon;
    static char     mon[4], *mons[12] = {
                   "Jan", "Feb", "Mar", "Apr", "May", "Jun",
                    "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
    };

    buf = (struct stat *) malloc(sizeof(struct stat));
    fstat(fileno(f), buf);

    sscanf(ctime(&(buf->st_mtime)), "%*4s%3s%d%d:%d:%d%d", mon, &day, &hr, &min,
           &sec, &yr);
    for (imon = 0; imon < 12 && strcmp(mon, mons[imon]); imon++);

    *date = (unsigned short) (((yr - 1980) << 9) + ((imon + 1) << 5) + day);
    *time = (unsigned short) ((hr << 11) + (min << 5) + sec / 2);
#endif
#if    MTS
    fortran         timein(),
#if    USEGFINFO
                    gfinfo();
#else
                    fileinfo();
#endif
    int             stclk[2];
    char            name[24];
    struct bigtime {
        int             greg;
        int             year;
        int             mon;
        int             day;
        int             hour;
        int             min;
        int             sec;
        int             usec;
        int             week;
        int             toff;
        int             tzn1;
        int             tzn2;
    }               tvec;
#if    USEGFINFO
    static int      gfflag = 0x0009, gfdummy[2] = {
                               0, 0
    };
    int             gfcinfo[18];
#else
    static int      cattype = 2;
#endif

    strcpy(name, f);
    strcat(name, " ");
#if    USEGFINFO
    gfcinfo[0] = 18;
    gfinfo(name, name, &gfflag, gfcinfo, gfdummy, gfdummy);
    timein("*IBM MICROSECONDS*", &gfcinfo[16], &tvec);
#else
    fileinfo(name, &cattype, "CILCCT  ", stclk);
    timein("*IBM MICROSECONDS*", stclk, &tvec);
#endif

    *date = (unsigned short) (((tvec.year - 1980) << 9) + ((tvec.mon) << 5) + tvec.day);
    *time = (unsigned short) ((tvec.hour << 11) + (tvec.min << 5) + tvec.sec / 2);
#endif
}

void
setstamp(f, date, time)        /* set a file's date/time stamp */
    char           *f;    /* filename to stamp */
    unsigned short    date, time;    /* desired date, time */
{
#if    MSDOS
    FILE    *ff;
    struct {
        int             ax, bx, cx, dx, si, di, ds, es;
    }               reg;

    ff = fopen(f, "w+");    /* How else can I get a handle? */

    reg.ax = 0x5701;    /* set date/time */
    reg.bx = filehand(f);    /* file handle */
    reg.cx = time;        /* desired time */
    reg.dx = date;        /* desired date */
    if (sysint21(®, ®) & 1)    /* DOS call */
        printf("Set timestamp fail (%d)\n", reg.ax);
    fclose(ff);
#endif
#if    GEMDOS
    int    fd, set[2];

    fd = Fopen(f, 0);
    set[0] = time;
    set[1] = date;
    Fdatime(set, fd, 1);
    Fclose(fd);
#endif
#if    UNIX
    struct tws      tms;
    struct timeval  tvp[2];
    int    utimes();
    twscopy(&tms, dtwstime());
    tms.tw_sec = (time & 31) * 2;
    tms.tw_min = (time >> 5) & 63;
    tms.tw_hour = (time >> 11);
    tms.tw_mday = date & 31;
    tms.tw_mon = ((date >> 5) & 15) - 1;
    tms.tw_year = (date >> 9) + 80;
    tms.tw_clock = 0L;
    tms.tw_flags = TW_NULL;
    tvp[0].tv_sec = twclock(&tms);
    tvp[1].tv_sec = tvp[0].tv_sec;
    tvp[0].tv_usec = tvp[1].tv_usec = 0;
    utimes(f, tvp);
#endif
}

#if    MSDOS
int
filehand(stream)        /* find handle on a file */
    struct bufstr  *stream;    /* file to grab onto */
{
    return stream->bufhand;    /* return DOS 2.0 file handle */
}
#endif

#if    UNIX
int
izadir(filename)        /* Is filename a directory? */
    char           *filename;
{
    struct stat     buf;

    if (stat(filename, &buf) != 0)
        return (0);    /* Ignore if stat fails since */
    else
        return (buf.st_mode & S_IFDIR);    /* bad files trapped later */
}
#endif