unix.c

infozip2.2源码

/*

 Copyright (C) 1990-1997 Mark Adler, Richard B. Wales, Jean-loup Gailly,
 Kai Uwe Rommel, Onno van der Linden and Igor Mandrichenko.
 Permission is granted to any individual or institution to use, copy, or
 redistribute this software so long as all of the original files are included,
 that it is not sold for profit, and that this copyright notice is retained.

*/

#include "zip.h"

#ifndef UTIL    /* the companion #endif is a bit of ways down ... */

#include <time.h>

#ifdef MINIX
#  ifdef S_IWRITE
#    undef S_IWRITE
#  endif /* S_IWRITE */
#  define S_IWRITE S_IWUSR
#endif /* S_IWUSR */

#define MATCH shmatch

#if defined(HAVE_DIRENT_H) || defined(_POSIX_VERSION)
#  include <dirent.h>
#else /* !HAVE_DIRENT_H */
#  ifdef HAVE_NDIR_H
#    include <ndir.h>
#  endif /* HAVE_NDIR_H */
#  ifdef HAVE_SYS_NDIR_H
#    include <sys/ndir.h>
#  endif /* HAVE_SYS_NDIR_H */
#  ifdef HAVE_SYS_DIR_H
#    include <sys/dir.h>
#  endif /* HAVE_SYS_DIR_H */
#  ifndef dirent
#    define dirent direct
#  endif
#endif /* HAVE_DIRENT_H || _POSIX_VERSION */

#define PAD 0
#define PATH_END '/'

/* Library functions not in (most) header files */

#ifdef _POSIX_VERSION
#  include <utime.h>
#else
   int utime OF((char *, time_t *));
#endif

extern char *label;
local ulg label_time = 0;
local ulg label_mode = 0;
local time_t label_utim = 0;

/* Local functions */
local char *readd OF((DIR *));


#ifdef NO_DIR                    /* for AT&T 3B1 */
#include <sys/dir.h>
#ifndef dirent
#  define dirent direct
#endif
typedef FILE DIR;
/*
**  Apparently originally by Rich Salz.
**  Cleaned up and modified by James W. Birdsall.
*/

#define opendir(path) fopen(path, "r")

struct dirent *readdir(dirp)
DIR *dirp;
{
  static struct dirent entry;

  if (dirp == NULL)
    return NULL;
  for (;;)
    if (fread (&entry, sizeof (struct dirent), 1, dirp) == 0)
      return NULL;
    else if (entry.d_ino)
      return (&entry);
} /* end of readdir() */

#define closedir(dirp) fclose(dirp)
#endif /* NO_DIR */


local char *readd(d)
DIR *d;                 /* directory stream to read from */
/* Return a pointer to the next name in the directory stream d, or NULL if
   no more entries or an error occurs. */
{
  struct dirent *e;

  e = readdir(d);
  return e == NULL ? (char *) NULL : e->d_name;
}

int procname(n)
char *n;                /* name to process */
/* Process a name or sh expression to operate on (or exclude).  Return
   an error code in the ZE_ class. */
{
  char *a;              /* path and name for recursion */
  DIR *d;               /* directory stream from opendir() */
  char *e;              /* pointer to name from readd() */
  int m;                /* matched flag */
  char *p;              /* path for recursion */
  struct stat s;        /* result of stat() */
  struct zlist far *z;  /* steps through zfiles list */

  if (strcmp(n, "-") == 0)   /* if compressing stdin */
    return newname(n, 0);
  else if (LSSTAT(n, &s))
  {
    /* Not a file or directory--search for shell expression in zip file */
    p = ex2in(n, 0, (int *)NULL);       /* shouldn't affect matching chars */
    m = 1;
    for (z = zfiles; z != NULL; z = z->nxt) {
      if (MATCH(p, z->iname))
      {
        z->mark = pcount ? filter(z->zname) : 1;
        if (verbose)
            fprintf(mesg, "zip diagnostic: %scluding %s\n",
               z->mark ? "in" : "ex", z->name);
        m = 0;
      }
    }
    free((zvoid *)p);
    return m ? ZE_MISS : ZE_OK;
  }

  /* Live name--use if file, recurse if directory */
  if ((s.st_mode & S_IFDIR) == 0)
  {
    /* add or remove name of file */
    if ((m = newname(n, 0)) != ZE_OK)
      return m;
  } else {
    /* Add trailing / to the directory name */
    if ((p = malloc(strlen(n)+2)) == NULL)
      return ZE_MEM;
    if (strcmp(n, ".") == 0) {
      *p = '\0';  /* avoid "./" prefix and do not create zip entry */
    } else {
      strcpy(p, n);
      a = p + strlen(p);
      if (a[-1] != '/')
        strcpy(a, "/");
      if (dirnames && (m = newname(p, 1)) != ZE_OK) {
        free((zvoid *)p);
        return m;
      }
    }
    /* recurse into directory */
    if (recurse && (d = opendir(n)) != NULL)
    {
      while ((e = readd(d)) != NULL) {
        if (strcmp(e, ".") && strcmp(e, ".."))
        {
          if ((a = malloc(strlen(p) + strlen(e) + 1)) == NULL)
          {
            closedir(d);
            free((zvoid *)p);
            return ZE_MEM;
          }
          strcat(strcpy(a, p), e);
          if ((m = procname(a)) != ZE_OK)   /* recurse on name */
          {
            if (m == ZE_MISS)
              zipwarn("name not matched: ", a);
            else
              ziperr(m, a);
          }
          free((zvoid *)a);
        }
      }
      closedir(d);
    }
    free((zvoid *)p);
  } /* (s.st_mode & S_IFDIR) == 0) */
  return ZE_OK;
}

char *ex2in(x, isdir, pdosflag)
char *x;                /* external file name */
int isdir;              /* input: x is a directory */
int *pdosflag;          /* output: force MSDOS file attributes? */
/* Convert the external file name to a zip file name, returning the malloc'ed
   string or NULL if not enough memory. */
{
  char *n;              /* internal file name (malloc'ed) */
  char *t;              /* shortened name */
  int dosflag;

  dosflag = dosify;  /* default for non-DOS and non-OS/2 */

  /* Find starting point in name before doing malloc */
  for (t = x; *t == '/'; t++)
    ;

  /* Make changes, if any, to the copied name (leave original intact) */
  if (!pathput)
    t = last(t, PATH_END);

  /* Malloc space for internal name and copy it */
  if ((n = malloc(strlen(t) + 1)) == NULL)
    return NULL;
  strcpy(n, t);

  if (isdir == 42) return n;      /* avoid warning on unused variable */

  if (dosify)
    msname(n);

  /* Returned malloc'ed name */
  if (pdosflag)
    *pdosflag = dosflag;
  return n;
}

char *in2ex(n)
char *n;                /* internal file name */
/* Convert the zip file name to an external file name, returning the malloc'ed
   string or NULL if not enough memory. */
{
  char *x;              /* external file name */

  if ((x = malloc(strlen(n) + 1 + PAD)) == NULL)
    return NULL;
  strcpy(x, n);
  return x;
}

/*
 * XXX use ztimbuf in both POSIX and non POSIX cases ?
 */
void stamp(f, d)
char *f;                /* name of file to change */
ulg d;                  /* dos-style time to change it to */
/* Set last updated and accessed time of file f to the DOS time d. */
{
#ifdef _POSIX_VERSION
  struct utimbuf u;     /* argument for utime()  const ?? */
#else
  time_t u[2];          /* argument for utime() */
#endif

  /* Convert DOS time to time_t format in u */
#ifdef _POSIX_VERSION
  u.actime = u.modtime = dos2unixtime(d);
  utime(f, &u);
#else
  u[0] = u[1] = dos2unixtime(d);
  utime(f, u);
#endif

}

ulg filetime(f, a, n, t)
char *f;                /* name of file to get info on */
ulg *a;                 /* return value: file attributes */
long *n;                /* return value: file size */
iztimes *t;             /* return value: access, modific. and creation times */
/* If file *f does not exist, return 0.  Else, return the file's last
   modified date and time as an MSDOS date and time.  The date and
   time is returned in a long with the date most significant to allow
   unsigned integer comparison of absolute times.  Also, if a is not
   a NULL pointer, store the file attributes there, with the high two
   bytes being the Unix attributes, and the low byte being a mapping
   of that to DOS attributes.  If n is not NULL, store the file size
   there.  If t is not NULL, the file's access, modification and creation
   times are stored there as UNIX time_t values.
   If f is "-", use standard input as the file. If f is a device, return
   a file size of -1 */
{
  struct stat s;        /* results of stat() */
  char name[FNMAX];
  int len = strlen(f);

  if (f == label) {
    if (a != NULL)
      *a = label_mode;
    if (n != NULL)
      *n = -2L; /* convention for a label name */
    if (t != NULL)
      t->atime = t->mtime = t->ctime = label_utim;
    return label_time;
  }
  strcpy(name, f);
  if (name[len - 1] == '/')
    name[len - 1] = '\0';
  /* not all systems allow stat'ing a file with / appended */
  if (strcmp(f, "-") == 0) {
    if (fstat(fileno(stdin), &s) != 0)
      error("fstat(stdin)");
  }
  else if (LSSTAT(name, &s) != 0)
    /* Accept about any file kind including directories
     * (stored with trailing / with -r option)
     */
    return 0;

  if (a != NULL) {
    *a = ((ulg)s.st_mode << 16) | !(s.st_mode & S_IWRITE);
    if ((s.st_mode & S_IFMT) == S_IFDIR) {
      *a |= MSDOS_DIR_ATTR;
    }
  }
  if (n != NULL)
    *n = (s.st_mode & S_IFMT) == S_IFREG ? s.st_size : -1L;
  if (t != NULL) {
    t->atime = s.st_atime;
    t->mtime = s.st_mtime;
    t->ctime = t->mtime;   /* best guess, (s.st_ctime: last status change!!) */
  }
  return unix2dostime(&s.st_mtime);
}