Adding upstream version 1.20.13.upstream/1.20.13upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 502 insertions, 0 deletions

diff --git a/dpkg-deb/extract.c b/dpkg-deb/extract.c
new file mode 100644
index 0000000..d2c47e3
--- /dev/null
+++ b/dpkg-deb/extract.c
@@ -0,0 +1,502 @@
+/*
+ * dpkg-deb - construction and deconstruction of *.deb archives
+ * extract.c - extracting archives
+ *
+ * Copyright © 1994,1995 Ian Jackson <ijackson@chiark.greenend.org.uk>
+ * Copyright © 2006-2014 Guillem Jover <guillem@debian.org>
+ *
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <config.h>
+#include <compat.h>
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/wait.h>
+
+#include <errno.h>
+#include <limits.h>
+#include <string.h>
+#include <dirent.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <ar.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <stdio.h>
+
+#include <dpkg/i18n.h>
+#include <dpkg/dpkg.h>
+#include <dpkg/fdio.h>
+#include <dpkg/buffer.h>
+#include <dpkg/subproc.h>
+#include <dpkg/command.h>
+#include <dpkg/compress.h>
+#include <dpkg/ar.h>
+#include <dpkg/deb-version.h>
+#include <dpkg/options.h>
+
+#include "dpkg-deb.h"
+
+static void movecontrolfiles(const char *thing) {
+  char buf[200];
+  pid_t pid;
+
+  sprintf(buf, "mv %s/* . && rmdir %s", thing, thing);
+  pid = subproc_fork();
+  if (pid == 0) {
+    command_shell(buf, _("shell command to move files"));
+  }
+  subproc_reap(pid, _("shell command to move files"), 0);
+}
+
+static void DPKG_ATTR_NORET
+read_fail(int rc, const char *filename, const char *what)
+{
+  if (rc >= 0)
+    ohshit(_("unexpected end of file in %s in %.255s"),what,filename);
+  else
+    ohshite(_("error reading %s from file %.255s"), what, filename);
+}
+
+static ssize_t
+read_line(int fd, char *buf, size_t min_size, size_t max_size)
+{
+  ssize_t line_size = 0;
+  size_t n = min_size;
+
+  while (line_size < (ssize_t)max_size) {
+    ssize_t r;
+    char *nl;
+
+    r = fd_read(fd, buf + line_size, n);
+    if (r <= 0)
+      return r;
+
+    nl = memchr(buf + line_size, '\n', r);
+    line_size += r;
+
+    if (nl != NULL) {
+      nl[1] = '\0';
+      return line_size;
+    }
+
+    n = 1;
+  }
+
+  buf[line_size] = '\0';
+  return line_size;
+}
+
+void
+extracthalf(const char *debar, const char *dir,
+            enum dpkg_tar_options taroption, int admininfo)
+{
+  struct dpkg_error err;
+  const char *errstr;
+  struct dpkg_ar *ar;
+  char versionbuf[40];
+  struct deb_version version;
+  off_t ctrllennum, memberlen = 0;
+  ssize_t r;
+  int dummy;
+  pid_t c1=0,c2,c3;
+  int p1[2], p2[2];
+  int p2_out;
+  char nlc;
+  int adminmember = -1;
+  bool header_done;
+  enum compressor_type decompressor = COMPRESSOR_TYPE_GZIP;
+
+  ar = dpkg_ar_open(debar);
+
+  r = read_line(ar->fd, versionbuf, strlen(DPKG_AR_MAGIC), sizeof(versionbuf) - 1);
+  if (r <= 0)
+    read_fail(r, debar, _("archive magic version number"));
+
+  if (strcmp(versionbuf, DPKG_AR_MAGIC) == 0) {
+    ctrllennum= 0;
+    header_done = false;
+    for (;;) {
+      struct dpkg_ar_hdr arh;
+
+      r = fd_read(ar->fd, &arh, sizeof(arh));
+      if (r != sizeof(arh))
+        read_fail(r, debar, _("archive member header"));
+
+      if (dpkg_ar_member_is_illegal(&arh))
+        ohshit(_("file '%.250s' is corrupt - bad archive header magic"), debar);
+
+      dpkg_ar_normalize_name(&arh);
+
+      memberlen = dpkg_ar_member_get_size(ar, &arh);
+      if (!header_done) {
+        char *infobuf;
+
+        if (strncmp(arh.ar_name, DEBMAGIC, sizeof(arh.ar_name)) != 0)
+          ohshit(_("file '%.250s' is not a Debian binary archive (try dpkg-split?)"),
+                 debar);
+        infobuf= m_malloc(memberlen+1);
+        r = fd_read(ar->fd, infobuf, memberlen + (memberlen & 1));
+        if (r != (memberlen + (memberlen & 1)))
+          read_fail(r, debar, _("archive information header member"));
+        infobuf[memberlen] = '\0';
+
+        if (strchr(infobuf, '\n') == NULL)
+          ohshit(_("archive has no newlines in header"));
+        errstr = deb_version_parse(&version, infobuf);
+        if (errstr)
+          ohshit(_("archive has invalid format version: %s"), errstr);
+        if (version.major != 2)
+          ohshit(_("archive is format version %d.%d; get a newer dpkg-deb"),
+                 version.major, version.minor);
+
+        free(infobuf);
+
+        header_done = true;
+      } else if (arh.ar_name[0] == '_') {
+        /* Members with ‘_’ are noncritical, and if we don't understand
+         * them we skip them. */
+        if (fd_skip(ar->fd, memberlen + (memberlen & 1), &err) < 0)
+          ohshit(_("cannot skip archive member from '%s': %s"), ar->name, err.str);
+      } else {
+        if (strncmp(arh.ar_name, ADMINMEMBER, strlen(ADMINMEMBER)) == 0) {
+          const char *extension = arh.ar_name + strlen(ADMINMEMBER);
+
+	  adminmember = 1;
+          decompressor = compressor_find_by_extension(extension);
+          if (decompressor != COMPRESSOR_TYPE_NONE &&
+              decompressor != COMPRESSOR_TYPE_GZIP &&
+              decompressor != COMPRESSOR_TYPE_XZ)
+            ohshit(_("archive '%s' uses unknown compression for member '%.*s', "
+                     "giving up"),
+                   debar, (int)sizeof(arh.ar_name), arh.ar_name);
+        } else {
+          if (adminmember != 1)
+            ohshit(_("archive '%s' has premature member '%.*s' before '%s', "
+                     "giving up"),
+                   debar, (int)sizeof(arh.ar_name), arh.ar_name, ADMINMEMBER);
+
+	  if (strncmp(arh.ar_name, DATAMEMBER, strlen(DATAMEMBER)) == 0) {
+	    const char *extension = arh.ar_name + strlen(DATAMEMBER);
+
+	    adminmember= 0;
+	    decompressor = compressor_find_by_extension(extension);
+            if (decompressor == COMPRESSOR_TYPE_UNKNOWN)
+              ohshit(_("archive '%s' uses unknown compression for member '%.*s', "
+                       "giving up"),
+                     debar, (int)sizeof(arh.ar_name), arh.ar_name);
+          } else {
+            ohshit(_("archive '%s' has premature member '%.*s' before '%s', "
+                     "giving up"),
+                   debar, (int)sizeof(arh.ar_name), arh.ar_name, DATAMEMBER);
+          }
+        }
+        if (adminmember == 1) {
+          if (ctrllennum != 0)
+            ohshit(_("archive '%.250s' contains two control members, giving up"),
+                   debar);
+          ctrllennum= memberlen;
+        }
+        if (!adminmember != !admininfo) {
+          if (fd_skip(ar->fd, memberlen + (memberlen & 1), &err) < 0)
+            ohshit(_("cannot skip archive member from '%s': %s"), ar->name, err.str);
+        } else {
+          /* Yes! - found it. */
+          break;
+        }
+      }
+    }
+
+    if (admininfo >= 2) {
+      printf(_(" new Debian package, version %d.%d.\n"
+               " size %jd bytes: control archive=%jd bytes.\n"),
+             version.major, version.minor,
+             (intmax_t)ar->size, (intmax_t)ctrllennum);
+      m_output(stdout, _("<standard output>"));
+    }
+  } else if (strncmp(versionbuf, "0.93", 4) == 0) {
+    char ctrllenbuf[40];
+    int l;
+
+    l = strlen(versionbuf);
+
+    if (strchr(versionbuf, '\n') == NULL)
+      ohshit(_("archive has no newlines in header"));
+    errstr = deb_version_parse(&version, versionbuf);
+    if (errstr)
+      ohshit(_("archive has invalid format version: %s"), errstr);
+
+    r = read_line(ar->fd, ctrllenbuf, 1, sizeof(ctrllenbuf) - 1);
+    if (r <= 0)
+      read_fail(r, debar, _("archive control member size"));
+    if (sscanf(ctrllenbuf, "%jd%c%d", (intmax_t *)&ctrllennum, &nlc, &dummy) != 2 ||
+        nlc != '\n')
+      ohshit(_("archive has malformed control member size '%s'"), ctrllenbuf);
+
+    if (admininfo) {
+      memberlen = ctrllennum;
+    } else {
+      memberlen = ar->size - ctrllennum - strlen(ctrllenbuf) - l;
+      if (fd_skip(ar->fd, ctrllennum, &err) < 0)
+        ohshit(_("cannot skip archive control member from '%s': %s"), ar->name,
+               err.str);
+    }
+
+    if (admininfo >= 2) {
+      printf(_(" old Debian package, version %d.%d.\n"
+               " size %jd bytes: control archive=%jd, main archive=%jd.\n"),
+             version.major, version.minor,
+             (intmax_t)ar->size, (intmax_t)ctrllennum,
+             (intmax_t)(ar->size - ctrllennum - strlen(ctrllenbuf) - l));
+      m_output(stdout, _("<standard output>"));
+    }
+  } else {
+    if (strncmp(versionbuf, "!<arch>", 7) == 0) {
+      notice(_("file looks like it might be an archive which has been\n"
+               " corrupted by being downloaded in ASCII mode"));
+    }
+
+    ohshit(_("'%.255s' is not a Debian format archive"), debar);
+  }
+
+  m_pipe(p1);
+  c1 = subproc_fork();
+  if (!c1) {
+    close(p1[0]);
+    if (fd_fd_copy(ar->fd, p1[1], memberlen, &err) < 0)
+      ohshit(_("cannot copy archive member from '%s' to decompressor pipe: %s"),
+             ar->name, err.str);
+    if (close(p1[1]))
+      ohshite(_("cannot close decompressor pipe"));
+    exit(0);
+  }
+  close(p1[1]);
+
+  if (taroption) {
+    m_pipe(p2);
+    p2_out = p2[1];
+  } else {
+    p2_out = 1;
+  }
+
+  c2 = subproc_fork();
+  if (!c2) {
+    if (taroption)
+      close(p2[0]);
+    decompress_filter(decompressor, p1[0], p2_out,
+                      _("decompressing archive '%s' (size=%jd) member '%s'"),
+                      ar->name, (intmax_t)ar->size,
+                      admininfo ? ADMINMEMBER : DATAMEMBER);
+    exit(0);
+  }
+  close(p1[0]);
+  dpkg_ar_close(ar);
+
+  if (taroption) {
+    close(p2[1]);
+
+    c3 = subproc_fork();
+    if (!c3) {
+      struct command cmd;
+
+      command_init(&cmd, TAR, "tar");
+      command_add_arg(&cmd, "tar");
+
+      if ((taroption & DPKG_TAR_LIST) && (taroption & DPKG_TAR_EXTRACT))
+        command_add_arg(&cmd, "-xv");
+      else if (taroption & DPKG_TAR_EXTRACT)
+        command_add_arg(&cmd, "-x");
+      else if (taroption & DPKG_TAR_LIST)
+        command_add_arg(&cmd, "-tv");
+      else
+        internerr("unknown or missing tar action '%d'", taroption);
+
+      if (taroption & DPKG_TAR_PERMS)
+        command_add_arg(&cmd, "-p");
+      if (taroption & DPKG_TAR_NOMTIME)
+        command_add_arg(&cmd, "-m");
+
+      command_add_arg(&cmd, "-f");
+      command_add_arg(&cmd, "-");
+      command_add_arg(&cmd, "--warning=no-timestamp");
+
+      m_dup2(p2[0],0);
+      close(p2[0]);
+
+      unsetenv("TAR_OPTIONS");
+
+      if (dir) {
+        if (mkdir(dir, 0777) != 0) {
+          if (errno != EEXIST)
+            ohshite(_("failed to create directory"));
+
+          if (taroption & DPKG_TAR_CREATE_DIR)
+            ohshite(_("unexpected pre-existing pathname %s"), dir);
+        }
+        if (chdir(dir) != 0)
+          ohshite(_("failed to chdir to directory"));
+      }
+
+      command_exec(&cmd);
+    }
+    close(p2[0]);
+    subproc_reap(c3, "tar", 0);
+  }
+
+  subproc_reap(c2, _("<decompress>"), SUBPROC_NOPIPE);
+  if (c1 != -1)
+    subproc_reap(c1, _("paste"), 0);
+  if (version.major == 0 && admininfo) {
+    /* Handle the version as a float to preserve the behaviour of old code,
+     * because even if the format is defined to be padded by 0's that might
+     * not have been always true for really ancient versions... */
+    while (version.minor && (version.minor % 10) == 0)
+      version.minor /= 10;
+
+    if (version.minor ==  931)
+      movecontrolfiles(OLDOLDDEBDIR);
+    else if (version.minor == 932 || version.minor == 933)
+      movecontrolfiles(OLDDEBDIR);
+  }
+}
+
+int
+do_ctrltarfile(const char *const *argv)
+{
+  const char *debar;
+
+  debar = *argv++;
+  if (debar == NULL)
+    badusage(_("--%s needs a .deb filename argument"), cipaction->olong);
+  if (*argv)
+    badusage(_("--%s takes only one argument (.deb filename)"),
+             cipaction->olong);
+
+  extracthalf(debar, NULL, DPKG_TAR_PASSTHROUGH, 1);
+
+  return 0;
+}
+
+int
+do_fsystarfile(const char *const *argv)
+{
+  const char *debar;
+
+  debar = *argv++;
+  if (debar == NULL)
+    badusage(_("--%s needs a .deb filename argument"),cipaction->olong);
+  if (*argv)
+    badusage(_("--%s takes only one argument (.deb filename)"),cipaction->olong);
+  extracthalf(debar, NULL, DPKG_TAR_PASSTHROUGH, 0);
+
+  return 0;
+}
+
+int
+do_control(const char *const *argv)
+{
+  const char *debar, *dir;
+
+  debar = *argv++;
+  if (debar == NULL)
+    badusage(_("--%s needs a .deb filename argument"), cipaction->olong);
+
+  dir = *argv++;
+  if (dir == NULL)
+    dir = EXTRACTCONTROLDIR;
+  else if (*argv)
+    badusage(_("--%s takes at most two arguments (.deb and directory)"),
+             cipaction->olong);
+
+  extracthalf(debar, dir, DPKG_TAR_EXTRACT, 1);
+
+  return 0;
+}
+
+int
+do_extract(const char *const *argv)
+{
+  const char *debar, *dir;
+  enum dpkg_tar_options options = DPKG_TAR_EXTRACT | DPKG_TAR_PERMS;
+
+  if (opt_verbose)
+    options |= DPKG_TAR_LIST;
+
+  debar = *argv++;
+  if (debar == NULL)
+    badusage(_("--%s needs .deb filename and directory arguments"),
+             cipaction->olong);
+
+  dir = *argv++;
+  if (dir == NULL)
+    badusage(_("--%s needs a target directory.\n"
+               "Perhaps you should be using dpkg --install ?"),
+             cipaction->olong);
+  else if (*argv)
+    badusage(_("--%s takes at most two arguments (.deb and directory)"),
+             cipaction->olong);
+
+  extracthalf(debar, dir, options, 0);
+
+  return 0;
+}
+
+int
+do_vextract(const char *const *argv)
+{
+  /* XXX: Backward compatibility. */
+  opt_verbose = 1;
+  return do_extract(argv);
+}
+
+int
+do_raw_extract(const char *const *argv)
+{
+  enum dpkg_tar_options data_options;
+  const char *debar, *dir;
+  char *control_dir;
+
+  debar = *argv++;
+  if (debar == NULL)
+    badusage(_("--%s needs .deb filename and directory arguments"),
+             cipaction->olong);
+  else if (strcmp(debar, "-") == 0)
+    badusage(_("--%s does not support (yet) reading the .deb from standard input"),
+             cipaction->olong);
+
+  dir = *argv++;
+  if (dir == NULL)
+    badusage(_("--%s needs a target directory.\n"
+               "Perhaps you should be using dpkg --install ?"),
+             cipaction->olong);
+  else if (*argv)
+    badusage(_("--%s takes at most two arguments (.deb and directory)"),
+             cipaction->olong);
+
+  control_dir = str_fmt("%s/%s", dir, EXTRACTCONTROLDIR);
+
+  data_options = DPKG_TAR_EXTRACT | DPKG_TAR_PERMS;
+  if (opt_verbose)
+    data_options |= DPKG_TAR_LIST;
+
+  extracthalf(debar, dir, data_options, 0);
+  extracthalf(debar, control_dir, DPKG_TAR_EXTRACT | DPKG_TAR_CREATE_DIR, 1);
+
+  free(control_dir);
+
+  return 0;
+}