ENH: Initial import

1 files changed, 234 insertions, 0 deletions

diff --git a/Utilities/cmtar/encode.c b/Utilities/cmtar/encode.c
new file mode 100644
index 0000000..cadac67
--- /dev/null
+++ b/Utilities/cmtar/encode.c
@@ -0,0 +1,234 @@
+/*
+**  Copyright 1998-2003 University of Illinois Board of Trustees
+**  Copyright 1998-2003 Mark D. Roth
+**  All rights reserved.
+**
+**  encode.c - libtar code to encode tar header blocks
+**
+**  Mark D. Roth <roth@uiuc.edu>
+**  Campus Information Technologies and Educational Services
+**  University of Illinois at Urbana-Champaign
+*/
+
+#include <libtarint/internal.h>
+
+#include <stdio.h>
+#ifndef WIN32
+#include <pwd.h>
+#include <grp.h>
+#endif
+#include <sys/types.h>
+
+#ifdef STDC_HEADERS
+# include <string.h>
+# include <stdlib.h>
+#endif
+
+
+/* magic, version, and checksum */
+void
+th_finish(TAR *t)
+{
+  int i, sum = 0;
+
+  if (t->options & TAR_GNU)
+    strncpy(t->th_buf.magic, "ustar  ", 8);
+  else
+  {
+    strncpy(t->th_buf.version, TVERSION, TVERSLEN);
+    strncpy(t->th_buf.magic, TMAGIC, TMAGLEN);
+  }
+
+  for (i = 0; i < T_BLOCKSIZE; i++)
+    sum += ((char *)(&(t->th_buf)))[i];
+  for (i = 0; i < 8; i++)
+    sum += (' ' - t->th_buf.chksum[i]);
+  int_to_oct(sum, t->th_buf.chksum, 8);
+}
+
+
+/* map a file mode to a typeflag */
+void
+th_set_type(TAR *t, mode_t mode)
+{
+#ifdef S_ISLNK
+  if (S_ISLNK(mode))
+    t->th_buf.typeflag = SYMTYPE;
+#endif
+  if (S_ISREG(mode))
+    t->th_buf.typeflag = REGTYPE;
+  if (S_ISDIR(mode))
+    t->th_buf.typeflag = DIRTYPE;
+#ifdef S_ISCHR
+  if (S_ISCHR(mode))
+    t->th_buf.typeflag = CHRTYPE;
+#endif
+  if (S_ISBLK(mode))
+    t->th_buf.typeflag = BLKTYPE;
+  if (S_ISFIFO(mode)
+#ifdef S_ISSOCK
+     || S_ISSOCK(mode))
+#else
+    )
+#endif
+    t->th_buf.typeflag = FIFOTYPE;
+}
+
+
+/* encode file path */
+void
+th_set_path(TAR *t, char *pathname)
+{
+  char suffix[2] = "";
+  char *tmp;
+
+#ifdef DEBUG
+  printf("in th_set_path(th, pathname=\"%s\")\n", pathname);
+#endif
+
+  if (t->th_buf.gnu_longname != NULL)
+    free(t->th_buf.gnu_longname);
+  t->th_buf.gnu_longname = NULL;
+
+  if (pathname[strlen(pathname) - 1] != '/' && TH_ISDIR(t))
+    strcpy(suffix, "/");
+
+  if (strlen(pathname) > T_NAMELEN && (t->options & TAR_GNU))
+  {
+    /* GNU-style long name */
+    t->th_buf.gnu_longname = strdup(pathname);
+    strncpy(t->th_buf.name, t->th_buf.gnu_longname, T_NAMELEN);
+  }
+  else if (strlen(pathname) > T_NAMELEN)
+  {
+    /* POSIX-style prefix field */
+    tmp = strchr(&(pathname[strlen(pathname) - T_NAMELEN - 1]), '/');
+    if (tmp == NULL)
+    {
+      printf("!!! '/' not found in \"%s\"\n", pathname);
+      return;
+    }
+    snprintf(t->th_buf.name, 100, "%s%s", &(tmp[1]), suffix);
+    snprintf(t->th_buf.prefix,
+       ((tmp - pathname + 1) <
+        155 ? (tmp - pathname + 1) : 155), "%s", pathname);
+  }
+  else
+    /* classic tar format */
+    snprintf(t->th_buf.name, 100, "%s%s", pathname, suffix);
+
+#ifdef DEBUG
+  puts("returning from th_set_path()...");
+#endif
+}
+
+
+/* encode link path */
+void
+th_set_link(TAR *t, char *linkname)
+{
+#ifdef DEBUG
+  printf("==> th_set_link(th, linkname=\"%s\")\n", linkname);
+#endif
+
+  if (strlen(linkname) > T_NAMELEN && (t->options & TAR_GNU))
+  {
+    /* GNU longlink format */
+    t->th_buf.gnu_longlink = strdup(linkname);
+    strcpy(t->th_buf.linkname, "././@LongLink");
+  }
+  else
+  {
+    /* classic tar format */
+    strlcpy(t->th_buf.linkname, linkname,
+      sizeof(t->th_buf.linkname));
+    if (t->th_buf.gnu_longlink != NULL)
+      free(t->th_buf.gnu_longlink);
+    t->th_buf.gnu_longlink = NULL;
+  }
+}
+
+
+/* encode device info */
+void
+th_set_device(TAR *t, dev_t device)
+{
+#ifdef DEBUG
+  printf("th_set_device(): major = %d, minor = %d\n",
+         major(device), minor(device));
+#endif
+#ifndef major
+# define major(dev) ((int)(((dev) >> 8) & 0xff))
+#endif
+#ifndef minor
+# define minor(dev) ((int)((dev) & 0xff))
+#endif
+  int_to_oct(major(device), t->th_buf.devmajor, 8);
+  int_to_oct(minor(device), t->th_buf.devminor, 8);
+}
+
+
+/* encode user info */
+void
+th_set_user(TAR *t, uid_t uid)
+{
+#ifndef WIN32
+  struct passwd *pw;
+
+  pw = getpwuid(uid);
+  if (pw != NULL)
+    strlcpy(t->th_buf.uname, pw->pw_name, sizeof(t->th_buf.uname));
+#endif
+  int_to_oct(uid, t->th_buf.uid, 8);
+}
+
+
+/* encode group info */
+void
+th_set_group(TAR *t, gid_t gid)
+{
+#ifndef WIN32
+  struct group *gr;
+
+  gr = getgrgid(gid);
+  if (gr != NULL)
+    strlcpy(t->th_buf.gname, gr->gr_name, sizeof(t->th_buf.gname));
+#endif
+  int_to_oct(gid, t->th_buf.gid, 8);
+}
+
+
+/* encode file mode */
+void
+th_set_mode(TAR *t, mode_t fmode)
+{
+#ifndef WIN32
+  if (S_ISSOCK(fmode))
+  {
+    fmode &= ~S_IFSOCK;
+    fmode |= S_IFIFO;
+  }
+#endif
+  int_to_oct(fmode, (t)->th_buf.mode, 8);
+}
+
+
+void
+th_set_from_stat(TAR *t, struct stat *s)
+{
+  th_set_type(t, s->st_mode);
+#ifndef WIN32
+  if (S_ISCHR(s->st_mode) || S_ISBLK(s->st_mode))
+    th_set_device(t, s->st_rdev);
+#endif
+  th_set_user(t, s->st_uid);
+  th_set_group(t, s->st_gid);
+  th_set_mode(t, s->st_mode);
+  th_set_mtime(t, s->st_mtime);
+  if (S_ISREG(s->st_mode))
+    th_set_size(t, s->st_size);
+  else
+    th_set_size(t, 0);
+}
+
+