--- /dev/null
+/* Minimal /bin/sh for in-container use.
+ Copyright (C) 2018 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library 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
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+#define _FILE_OFFSET_BITS 64
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sched.h>
+#include <sys/syscall.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <dirent.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <sys/fcntl.h>
+#include <sys/file.h>
+#include <sys/wait.h>
+#include <stdarg.h>
+#include <sys/sysmacros.h>
+#include <ctype.h>
+#include <utime.h>
+#include <errno.h>
+#include <error.h>
+
+#include <support/support.h>
+
+/* Design considerations
+
+ General rule: optimize for developer time, not run time.
+
+ Specifically:
+
+ * Don't worry about slow algorithms
+ * Don't worry about free'ing memory
+ * Don't implement anything the testsuite doesn't need.
+ * Line and argument counts are limited, see below.
+
+*/
+
+#define MAX_ARG_COUNT 100
+#define MAX_LINE_LENGTH 1000
+
+/* Debugging is enabled via --debug, which must be the first argument. */
+static int debug_mode = 0;
+#define dprintf if (debug_mode) fprintf
+
+/* Emulate the "/bin/true" command. Arguments are ignored. */
+static int
+true_func (char **argv)
+{
+ return 0;
+}
+
+/* Emulate the "/bin/echo" command. Options are ignored, arguments
+ are printed to stdout. */
+static int
+echo_func (char **argv)
+{
+ int i;
+
+ for (i = 0; argv[i]; i++)
+ {
+ if (i > 0)
+ putchar (' ');
+ fputs (argv[i], stdout);
+ }
+ putchar ('\n');
+
+ return 0;
+}
+
+/* Emulate the "/bin/cp" command. Options are ignored. Only copies
+ one source file to one destination file. Directory destinations
+ are not supported. */
+static int
+copy_func (char **argv)
+{
+ char *sname = argv[0];
+ char *dname = argv[1];
+ int sfd, dfd;
+ struct stat st;
+
+ sfd = open (sname, O_RDONLY);
+ if (sfd < 0)
+ {
+ fprintf (stderr, "cp: unable to open %s for reading: %s\n",
+ sname, strerror (errno));
+ return 1;
+ }
+
+ if (fstat (sfd, &st) < 0)
+ {
+ fprintf (stderr, "cp: unable to fstat %s: %s\n",
+ sname, strerror (errno));
+ return 1;
+ }
+
+ dfd = open (dname, O_WRONLY | O_TRUNC | O_CREAT, 0600);
+ if (dfd < 0)
+ {
+ fprintf (stderr, "cp: unable to open %s for writing: %s\n",
+ dname, strerror (errno));
+ return 1;
+ }
+
+ if (copy_file_range (sfd, 0, dfd, 0, st.st_size, 0) != st.st_size)
+ {
+ fprintf (stderr, "cp: cannot copy file %s to %s: %s\n",
+ sname, dname, strerror (errno));
+ return 1;
+ }
+
+ close (sfd);
+ close (dfd);
+
+ chmod (dname, st.st_mode & 0777);
+
+ return 0;
+
+}
+
+/* This is a list of all the built-in commands we understand. */
+static struct {
+ const char *name;
+ int (*func) (char **argv);
+} builtin_funcs[] = {
+ { "true", true_func },
+ { "echo", echo_func },
+ { "cp", copy_func },
+ { NULL, NULL }
+};
+
+/* Run one tokenized command. argv[0] is the command. argv is
+ NULL-terminated. */
+static void
+run_command_array (char **argv)
+{
+ int i, j;
+ pid_t pid;
+ int status;
+ int (*builtin_func) (char **args);
+
+ if (argv[0] == NULL)
+ return;
+
+ builtin_func = NULL;
+
+ int new_stdin = 0;
+ int new_stdout = 1;
+ int new_stderr = 2;
+
+ dprintf (stderr, "run_command_array starting\n");
+ for (i = 0; argv[i]; i++)
+ dprintf (stderr, " argv [%d] `%s'\n", i, argv[i]);
+
+ for (j = i = 0; argv[i]; i++)
+ {
+ if (strcmp (argv[i], "<") == 0 && argv[i + 1])
+ {
+ new_stdin = open (argv[i + 1], O_WRONLY|O_CREAT|O_TRUNC, 0777);
+ ++i;
+ continue;
+ }
+ if (strcmp (argv[i], ">") == 0 && argv[i + 1])
+ {
+ new_stdout = open (argv[i + 1], O_WRONLY|O_CREAT|O_TRUNC, 0777);
+ ++i;
+ continue;
+ }
+ if (strcmp (argv[i], ">>") == 0 && argv[i + 1])
+ {
+ new_stdout = open (argv[i + 1], O_WRONLY|O_CREAT|O_APPEND, 0777);
+ ++i;
+ continue;
+ }
+ if (strcmp (argv[i], "2>") == 0 && argv[i + 1])
+ {
+ new_stderr = open (argv[i + 1], O_WRONLY|O_CREAT|O_TRUNC, 0777);
+ ++i;
+ continue;
+ }
+ argv[j++] = argv[i];
+ }
+ argv[j] = NULL;
+
+
+ for (i = 0; builtin_funcs[i].name != NULL; i++)
+ if (strcmp (argv[0], builtin_funcs[i].name) == 0)
+ builtin_func = builtin_funcs[i].func;
+
+ dprintf (stderr, "builtin %p argv0 `%s'\n", builtin_func, argv[0]);
+
+ pid = fork ();
+ if (pid < 0)
+ {
+ fprintf (stderr, "sh: fork failed\n");
+ exit (1);
+ }
+
+ if (pid == 0)
+ {
+ if (new_stdin != 0)
+ {
+ dup2 (new_stdin, 0);
+ close (new_stdin);
+ }
+ if (new_stdout != 1)
+ {
+ dup2 (new_stdout, 1);
+ close (new_stdout);
+ }
+ if (new_stderr != 2)
+ {
+ dup2 (new_stderr, 2);
+ close (new_stdout);
+ }
+
+ if (builtin_func != NULL)
+ exit (builtin_func (argv + 1));
+
+ execvp (argv[0], argv);
+
+ fprintf (stderr, "sh: execing %s failed: %s",
+ argv[0], strerror (errno));
+ exit (1);
+ }
+
+ waitpid (pid, &status, 0);
+
+ dprintf (stderr, "exiting run_command_array\n");
+
+ if (WIFEXITED (status))
+ {
+ int rv = WEXITSTATUS (status);
+ if (rv)
+ exit (rv);
+ }
+ else
+ exit (1);
+}
+
+/* Run one command-as-a-string, by tokenizing it. Limited to
+ MAX_ARG_COUNT arguments. Simple substitution is done of $1 to $9
+ (as whole separate tokens) from iargs[]. Quoted strings work if
+ the quotes wrap whole tokens; i.e. "foo bar" but not foo" bar". */
+static void
+run_command_string (const char *cmdline, const char **iargs)
+{
+ char *args[MAX_ARG_COUNT+1];
+ int ap = 0;
+ const char *start, *end;
+ int nargs;
+
+ for (nargs = 0; iargs[nargs] != NULL; ++nargs)
+ ;
+
+ dprintf (stderr, "run_command_string starting: '%s'\n", cmdline);
+
+ while (ap < MAX_ARG_COUNT)
+ {
+ /* If the argument is quoted, this is the quote character, else NUL. */
+ int in_quote = 0;
+
+ /* Skip whitespace up to the next token. */
+ while (*cmdline && isspace (*cmdline))
+ cmdline ++;
+ if (*cmdline == 0)
+ break;
+
+ start = cmdline;
+ /* Check for quoted argument. */
+ in_quote = (*cmdline == '\'' || *cmdline == '"') ? *cmdline : 0;
+
+ /* Skip to end of token; either by whitespace or matching quote. */
+ dprintf (stderr, "in_quote %d\n", in_quote);
+ while (*cmdline
+ && (!isspace (*cmdline) || in_quote))
+ {
+ if (*cmdline == in_quote
+ && cmdline != start)
+ in_quote = 0;
+ dprintf (stderr, "[%c]%d ", *cmdline, in_quote);
+ cmdline ++;
+ }
+ dprintf (stderr, "\n");
+
+ /* Allocate space for this token and store it in args[]. */
+ end = cmdline;
+ dprintf (stderr, "start<%s> end<%s>\n", start, end);
+ args[ap] = (char *) xmalloc (end - start + 1);
+ memcpy (args[ap], start, end - start);
+ args[ap][end - start] = 0;
+
+ /* Strip off quotes, if found. */
+ dprintf (stderr, "args[%d] = <%s>\n", ap, args[ap]);
+ if (args[ap][0] == '\''
+ && args[ap][strlen (args[ap])-1] == '\'')
+ {
+ args[ap][strlen (args[ap])-1] = 0;
+ args[ap] ++;
+ }
+
+ else if (args[ap][0] == '"'
+ && args[ap][strlen (args[ap])-1] == '"')
+ {
+ args[ap][strlen (args[ap])-1] = 0;
+ args[ap] ++;
+ }
+
+ /* Replace positional parameters like $4. */
+ else if (args[ap][0] == '$'
+ && isdigit (args[ap][1])
+ && args[ap][2] == 0)
+ {
+ int a = args[ap][1] - '1';
+ if (0 <= a && a < nargs)
+ args[ap] = strdup (iargs[a]);
+ }
+
+ ap ++;
+
+ if (*cmdline == 0)
+ break;
+ }
+
+ /* Lastly, NULL terminate the array and run it. */
+ args[ap] = NULL;
+ run_command_array (args);
+}
+
+/* Run a script by reading lines and passing them to the above
+ function. */
+static void
+run_script (const char *filename, const char **args)
+{
+ char line[MAX_LINE_LENGTH + 1];
+ dprintf (stderr, "run_script starting: '%s'\n", filename);
+ FILE *f = fopen (filename, "r");
+ if (f == NULL)
+ {
+ fprintf (stderr, "sh: %s: %s\n", filename, strerror (errno));
+ exit (1);
+ }
+ while (fgets (line, sizeof (line), f) != NULL)
+ {
+ if (line[0] == '#')
+ {
+ dprintf (stderr, "comment: %s\n", line);
+ continue;
+ }
+ run_command_string (line, args);
+ }
+ fclose (f);
+}
+
+int
+main (int argc, const char **argv)
+{
+ int i;
+
+ if (strcmp (argv[1], "--debug") == 0)
+ {
+ debug_mode = 1;
+ --argc;
+ ++argv;
+ }
+
+ dprintf (stderr, "container-sh starting:\n");
+ for (i = 0; i < argc; i++)
+ dprintf (stderr, " argv[%d] is `%s'\n", i, argv[i]);
+
+ if (strcmp (argv[1], "-c") == 0)
+ run_command_string (argv[2], argv+3);
+ else
+ run_script (argv[1], argv+2);
+
+ dprintf (stderr, "normal exit 0\n");
+ return 0;
+}
--- /dev/null
+/* Run a test case in an isolated namespace.
+ Copyright (C) 2018 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library 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
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+#define _FILE_OFFSET_BITS 64
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sched.h>
+#include <sys/syscall.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <dirent.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <sys/fcntl.h>
+#include <sys/file.h>
+#include <sys/wait.h>
+#include <stdarg.h>
+#include <sys/sysmacros.h>
+#include <ctype.h>
+#include <utime.h>
+#include <errno.h>
+#include <error.h>
+
+#ifdef __linux__
+#include <sys/mount.h>
+#endif
+
+#include <support/support.h>
+#include <support/xunistd.h>
+#include "check.h"
+#include "test-driver.h"
+
+#ifndef __linux__
+#define mount(s,t,fs,f,d) no_mount()
+int no_mount (void)
+{
+ FAIL_UNSUPPORTED("mount not supported; port needed");
+}
+#endif
+
+int verbose = 0;
+
+/* Running a test in a container is tricky. There are two main
+ categories of things to do:
+
+ 1. "Once" actions, like setting up the container and doing an
+ install into it.
+
+ 2. "Per-test" actions, like copying in support files and
+ configuring the container.
+
+
+ "Once" actions:
+
+ * mkdir $buildroot/testroot.pristine/
+ * install into it
+ * rsync to $buildroot/testroot.root/
+
+ "Per-test" actions:
+ * maybe rsync to $buildroot/testroot.root/
+ * copy support files and test binary
+ * chroot/unshare
+ * set up any mounts (like /proc)
+
+ Magic files:
+
+ For test $srcdir/foo/mytest.c we look for $srcdir/foo/mytest.root
+ and, if found...
+
+ * mytest.root/ is rsync'd into container
+ * mytest.root/preclean.req causes fresh rsync (with delete) before
+ test if present
+ * mytest.root/mytset.script has a list of "commands" to run:
+ syntax:
+ # comment
+ mv FILE FILE
+ cp FILE FILE
+ rm FILE
+ FILE must start with $B/, $S/, $I/, $L/, or /
+ (expands to build dir, source dir, install dir, library dir
+ (in container), or container's root)
+ * mytest.root/postclean.req causes fresh rsync (with delete) after
+ test if present
+
+ Note that $srcdir/foo/mytest.script may be used instead of a
+ $srcdir/foo/mytest.root/mytest.script in the sysroot template, if
+ there is no other reason for a sysroot.
+
+ Design goals:
+
+ * independent of other packages which may not be installed (like
+ rsync or Docker, or even "cp")
+
+ * Simple, easy to review code (i.e. prefer simple naive code over
+ complex efficient code)
+
+ * The current implementation ist parallel-make-safe, but only in
+ that it uses a lock to prevent parallel access to the testroot. */
+
+\f
+/* Utility Functions */
+
+/* Like xunlink, but it's OK if the file already doesn't exist. */
+void
+maybe_xunlink (const char *path)
+{
+ int rv = unlink (path);
+ if (rv < 0 && errno != ENOENT)
+ FAIL_EXIT1 ("unlink (\"%s\"): %m", path);
+}
+
+/* Like xmkdir, but it's OK if the directory already exists. */
+void
+maybe_xmkdir (const char *path, mode_t mode)
+{
+ struct stat st;
+
+ if (stat (path, &st) == 0
+ && S_ISDIR (st.st_mode))
+ return;
+ xmkdir (path, mode);
+}
+
+/* Temporarily concatenate multiple strings into one. Allows up to 10
+ temporary results; use strdup () if you need them to be
+ permanent. */
+static char *
+concat (const char *str, ...)
+{
+ /* Assume initialized to NULL/zero. */
+ static char *bufs[10];
+ static size_t buflens[10];
+ static int bufn = 0;
+ int n;
+ size_t len;
+ va_list ap, ap2;
+ char *cp;
+ char *next;
+
+ va_start (ap, str);
+ va_copy (ap2, ap);
+
+ n = bufn;
+ bufn = (bufn + 1) % 10;
+ len = strlen (str);
+
+ while ((next = va_arg (ap, char *)) != NULL)
+ len = len + strlen (next);
+
+ va_end (ap);
+
+ if (bufs[n] == NULL)
+ {
+ bufs[n] = xmalloc (len + 1); /* NUL */
+ buflens[n] = len + 1;
+ }
+ else if (buflens[n] < len + 1)
+ {
+ bufs[n] = xrealloc (bufs[n], len + 1); /* NUL */
+ buflens[n] = len + 1;
+ }
+
+ strcpy (bufs[n], str);
+ cp = strchr (bufs[n], '\0');
+ while ((next = va_arg (ap2, char *)) != NULL)
+ {
+ strcpy (cp, next);
+ cp = strchr (cp, '\0');
+ }
+ *cp = 0;
+ va_end (ap2);
+
+ return bufs[n];
+}
+
+/* Try to mount SRC onto DEST. */
+static void
+trymount (const char *src, const char *dest)
+{
+ if (mount (src, dest, "", MS_BIND, NULL) < 0)
+ FAIL_EXIT1 ("can't mount %s onto %s\n", src, dest);
+}
+
+/* Special case of above for devices like /dev/zero where we have to
+ mount a device over a device, not a directory over a directory. */
+static void
+devmount (const char *new_root_path, const char *which)
+{
+ int fd;
+ fd = open (concat (new_root_path, "/dev/", which, NULL),
+ O_CREAT | O_TRUNC | O_RDWR, 0777);
+ xclose (fd);
+
+ trymount (concat ("/dev/", which, NULL),
+ concat (new_root_path, "/dev/", which, NULL));
+}
+
+/* Returns true if the string "looks like" an environement variable
+ being set. */
+static int
+is_env_setting (const char *a)
+{
+ int count_name = 0;
+
+ while (*a)
+ {
+ if (isalnum (*a) || *a == '_')
+ ++count_name;
+ else if (*a == '=' && count_name > 0)
+ return 1;
+ else
+ return 0;
+ ++a;
+ }
+ return 0;
+}
+
+/* Break the_line into words and store in the_words. Max nwords,
+ returns actual count. */
+static int
+tokenize (char *the_line, char **the_words, int nwords)
+{
+ int rv = 0;
+
+ while (nwords > 0)
+ {
+ /* Skip leading whitespace, if any. */
+ while (*the_line && isspace (*the_line))
+ ++the_line;
+
+ /* End of line? */
+ if (*the_line == 0)
+ return rv;
+
+ /* THE_LINE points to a non-whitespace character, so we have a
+ word. */
+ *the_words = the_line;
+ ++the_words;
+ nwords--;
+ ++rv;
+
+ /* Skip leading whitespace, if any. */
+ while (*the_line && ! isspace (*the_line))
+ ++the_line;
+
+ /* We now point at the trailing NUL *or* some whitespace. */
+ if (*the_line == 0)
+ return rv;
+
+ /* It was whitespace, skip and keep tokenizing. */
+ *the_line++ = 0;
+ }
+
+ /* We get here if we filled the words buffer. */
+ return rv;
+}
+
+\f
+/* Mini-RSYNC implementation. Optimize later. */
+
+/* A few routines for an "rsync buffer" which stores the paths we're
+ working on. We continuously grow and shrink the paths in each
+ buffer so there's lot of re-use. */
+
+/* We rely on "initialized to zero" to set these up. */
+typedef struct
+{
+ char *buf;
+ size_t len;
+ size_t size;
+} path_buf;
+
+static path_buf spath, dpath;
+
+static void
+r_setup (char *path, path_buf * pb)
+{
+ size_t len = strlen (path);
+ if (pb->buf == NULL || pb->size < len + 1)
+ {
+ /* Round up. This is an arbitrary number, just to keep from
+ reallocing too often. */
+ size_t sz = ALIGN_UP (len + 1, 512);
+ if (pb->buf == NULL)
+ pb->buf = (char *) xmalloc (sz);
+ else
+ pb->buf = (char *) xrealloc (pb->buf, sz);
+ if (pb->buf == NULL)
+ FAIL_EXIT1 ("Out of memory while rsyncing\n");
+
+ pb->size = sz;
+ }
+ strcpy (pb->buf, path);
+ pb->len = len;
+}
+
+static void
+r_append (const char *path, path_buf * pb)
+{
+ size_t len = strlen (path) + pb->len;
+ if (pb->size < len + 1)
+ {
+ /* Round up */
+ size_t sz = ALIGN_UP (len + 1, 512);
+ pb->buf = (char *) xrealloc (pb->buf, sz);
+ if (pb->buf == NULL)
+ FAIL_EXIT1 ("Out of memory while rsyncing\n");
+
+ pb->size = sz;
+ }
+ strcpy (pb->buf + pb->len, path);
+ pb->len = len;
+}
+
+static int
+file_exists (char *path)
+{
+ struct stat st;
+ if (lstat (path, &st) == 0)
+ return 1;
+ return 0;
+}
+
+static void
+recursive_remove (char *path)
+{
+ pid_t child;
+ int status;
+
+ child = fork ();
+
+ switch (child) {
+ case -1:
+ FAIL_EXIT1 ("Unable to fork");
+ case 0:
+ /* Child. */
+ execlp ("rm", "rm", "-rf", path, NULL);
+ default:
+ /* Parent. */
+ waitpid (child, &status, 0);
+ /* "rm" would have already printed a suitable error message. */
+ if (! WIFEXITED (status)
+ || WEXITSTATUS (status) != 0)
+ exit (1);
+
+ break;
+ }
+}
+
+/* Used for both rsync and the mytest.script "cp" command. */
+static void
+copy_one_file (const char *sname, const char *dname)
+{
+ int sfd, dfd;
+ struct stat st;
+ struct utimbuf times;
+
+ sfd = open (sname, O_RDONLY);
+ if (sfd < 0)
+ FAIL_EXIT1 ("unable to open %s for reading\n", sname);
+
+ if (fstat (sfd, &st) < 0)
+ FAIL_EXIT1 ("unable to fstat %s\n", sname);
+
+ dfd = open (dname, O_WRONLY | O_TRUNC | O_CREAT, 0600);
+ if (dfd < 0)
+ FAIL_EXIT1 ("unable to open %s for writing\n", dname);
+
+ if (copy_file_range (sfd, 0, dfd, 0, st.st_size, 0) != st.st_size)
+ FAIL_EXIT1 ("cannot copy file %s to %s\n", sname, dname);
+
+ xclose (sfd);
+ xclose (dfd);
+
+ if (chmod (dname, st.st_mode & 0777) < 0)
+ FAIL_EXIT1 ("chmod %s: %s\n", dname, strerror (errno));
+
+ times.actime = st.st_atime;
+ times.modtime = st.st_mtime;
+ if (utime (dname, ×) < 0)
+ FAIL_EXIT1 ("utime %s: %s\n", dname, strerror (errno));
+}
+
+/* We don't check *everything* about the two files to see if a copy is
+ needed, just the minimum to make sure we get the latest copy. */
+static int
+need_sync (char *ap, char *bp, struct stat *a, struct stat *b)
+{
+ if ((a->st_mode & S_IFMT) != (b->st_mode & S_IFMT))
+ return 1;
+
+ if (S_ISLNK (a->st_mode))
+ {
+ int rv;
+ char *al, *bl;
+
+ if (a->st_size != b->st_size)
+ return 1;
+
+ al = xreadlink (ap);
+ bl = xreadlink (bp);
+ rv = strcmp (al, bl);
+ free (al);
+ free (bl);
+ if (rv == 0)
+ return 0; /* links are same */
+ return 1; /* links differ */
+ }
+
+ if (verbose)
+ {
+ if (a->st_size != b->st_size)
+ printf ("SIZE\n");
+ if ((a->st_mode & 0777) != (b->st_mode & 0777))
+ printf ("MODE\n");
+ if (a->st_mtime != b->st_mtime)
+ printf ("TIME\n");
+ }
+
+ if (a->st_size == b->st_size
+ && ((a->st_mode & 0777) == (b->st_mode & 0777))
+ && a->st_mtime == b->st_mtime)
+ return 0;
+
+ return 1;
+}
+
+static void
+rsync_1 (path_buf * src, path_buf * dest, int and_delete)
+{
+ DIR *dir;
+ struct dirent *de;
+ struct stat s, d;
+
+ r_append ("/", src);
+ r_append ("/", dest);
+
+ if (verbose)
+ printf ("sync %s to %s %s\n", src->buf, dest->buf,
+ and_delete ? "and delete" : "");
+
+ size_t staillen = src->len;
+
+ size_t dtaillen = dest->len;
+
+ dir = opendir (src->buf);
+
+ while ((de = readdir (dir)) != NULL)
+ {
+ if (strcmp (de->d_name, ".") == 0
+ || strcmp (de->d_name, "..") == 0)
+ continue;
+
+ src->len = staillen;
+ r_append (de->d_name, src);
+ dest->len = dtaillen;
+ r_append (de->d_name, dest);
+
+ s.st_mode = ~0;
+ d.st_mode = ~0;
+
+ if (lstat (src->buf, &s) != 0)
+ FAIL_EXIT1 ("%s obtained by readdir, but stat failed.\n", src->buf);
+
+ /* It's OK if this one fails, since we know the file might be
+ missing. */
+ lstat (dest->buf, &d);
+
+ if (! need_sync (src->buf, dest->buf, &s, &d))
+ {
+ if (S_ISDIR (s.st_mode))
+ rsync_1 (src, dest, and_delete);
+ continue;
+ }
+
+ if (d.st_mode != ~0)
+ switch (d.st_mode & S_IFMT)
+ {
+ case S_IFDIR:
+ if (!S_ISDIR (s.st_mode))
+ {
+ if (verbose)
+ printf ("-D %s\n", dest->buf);
+ recursive_remove (dest->buf);
+ }
+ break;
+
+ default:
+ if (verbose)
+ printf ("-F %s\n", dest->buf);
+ maybe_xunlink (dest->buf);
+ break;
+ }
+
+ switch (s.st_mode & S_IFMT)
+ {
+ case S_IFREG:
+ if (verbose)
+ printf ("+F %s\n", dest->buf);
+ copy_one_file (src->buf, dest->buf);
+ break;
+
+ case S_IFDIR:
+ if (verbose)
+ printf ("+D %s\n", dest->buf);
+ maybe_xmkdir (dest->buf, (s.st_mode & 0777) | 0700);
+ rsync_1 (src, dest, and_delete);
+ break;
+
+ case S_IFLNK:
+ {
+ char *lp;
+ if (verbose)
+ printf ("+L %s\n", dest->buf);
+ lp = xreadlink (src->buf);
+ xsymlink (lp, dest->buf);
+ free (lp);
+ break;
+ }
+
+ default:
+ break;
+ }
+ }
+
+ closedir (dir);
+ src->len = staillen;
+ src->buf[staillen] = 0;
+ dest->len = dtaillen;
+ dest->buf[dtaillen] = 0;
+
+ if (!and_delete)
+ return;
+
+ /* The rest of this function removes any files/directories in DEST
+ that do not exist in SRC. This is triggered as part of a
+ preclean or postsclean step. */
+
+ dir = opendir (dest->buf);
+
+ while ((de = readdir (dir)) != NULL)
+ {
+ if (strcmp (de->d_name, ".") == 0
+ || strcmp (de->d_name, "..") == 0)
+ continue;
+
+ src->len = staillen;
+ r_append (de->d_name, src);
+ dest->len = dtaillen;
+ r_append (de->d_name, dest);
+
+ s.st_mode = ~0;
+ d.st_mode = ~0;
+
+ lstat (src->buf, &s);
+
+ if (lstat (dest->buf, &d) != 0)
+ FAIL_EXIT1 ("%s obtained by readdir, but stat failed.\n", dest->buf);
+
+ if (s.st_mode == ~0)
+ {
+ /* dest exists and src doesn't, clean it. */
+ switch (d.st_mode & S_IFMT)
+ {
+ case S_IFDIR:
+ if (!S_ISDIR (s.st_mode))
+ {
+ if (verbose)
+ printf ("-D %s\n", dest->buf);
+ recursive_remove (dest->buf);
+ }
+ break;
+
+ default:
+ if (verbose)
+ printf ("-F %s\n", dest->buf);
+ maybe_xunlink (dest->buf);
+ break;
+ }
+ }
+ }
+
+ closedir (dir);
+}
+
+static void
+rsync (char *src, char *dest, int and_delete)
+{
+ r_setup (src, &spath);
+ r_setup (dest, &dpath);
+
+ rsync_1 (&spath, &dpath, and_delete);
+}
+
+\f
+int
+main (int argc, char **argv)
+{
+ pid_t child;
+ char *pristine_root_path;
+ char *new_root_path;
+ char *new_cwd_path;
+ char *new_objdir_path;
+ char *new_srcdir_path;
+ char **new_child_proc;
+ char *command_root;
+ char *command_base;
+ char *command_basename;
+ char *so_base;
+ int do_postclean = 0;
+
+ uid_t original_uid;
+ gid_t original_gid;
+ int UMAP;
+ int GMAP;
+ /* Used for "%lld %lld 1" so need not be large. */
+ char tmp[100];
+ struct stat st;
+ int lock_fd;
+
+ setbuf (stdout, NULL);
+
+ /* The command line we're expecting looks like this:
+ env <set some vars> ld.so <library path> test-binary
+
+ We need to peel off any "env" or "ld.so" portion of the command
+ line, and keep track of which env vars we should preserve and
+ which we drop. */
+
+ if (argc < 2)
+ {
+ fprintf (stderr, "Usage: containerize <program to run> <args...>\n");
+ exit (1);
+ }
+
+ if (strcmp (argv[1], "-v") == 0)
+ {
+ verbose = 1;
+ ++argv;
+ --argc;
+ }
+
+ if (strcmp (argv[1], "env") == 0)
+ {
+ ++argv;
+ --argc;
+ while (is_env_setting (argv[1]))
+ {
+ /* If there are variables we do NOT want to propogate, this
+ is where the test for them goes. */
+ {
+ /* Need to keep these. Note that putenv stores a
+ pointer to our argv. */
+ putenv (argv[1]);
+ }
+ ++argv;
+ --argc;
+ }
+ }
+
+ if (strncmp (argv[1], concat (support_objdir_root, "/elf/ld-linux-", NULL),
+ strlen (support_objdir_root) + 14) == 0)
+ {
+ ++argv;
+ --argc;
+ while (argv[1][0] == '-')
+ {
+ if (strcmp (argv[1], "--library-path") == 0)
+ {
+ ++argv;
+ --argc;
+ }
+ ++argv;
+ --argc;
+ }
+ }
+
+ pristine_root_path = strdup (concat (support_objdir_root,
+ "/testroot.pristine", NULL));
+ new_root_path = strdup (concat (support_objdir_root,
+ "/testroot.root", NULL));
+ new_cwd_path = get_current_dir_name ();
+ new_child_proc = argv + 1;
+
+ lock_fd = open (concat (pristine_root_path, "/lock.fd", NULL),
+ O_CREAT | O_TRUNC | O_RDWR, 0666);
+ if (lock_fd < 0)
+ FAIL_EXIT1 ("Cannot create testroot lock.\n");
+
+ while (flock (lock_fd, LOCK_EX) != 0)
+ {
+ if (errno != EINTR)
+ FAIL_EXIT1 ("Cannot lock testroot.\n");
+ }
+
+ xmkdirp (new_root_path, 0755);
+
+ /* We look for extra setup info in a subdir in the same spot as the
+ test, with the same name but a ".root" extension. This is that
+ directory. We try to look in the source tree if the path we're
+ given refers to the build tree, but we rely on the path to be
+ absolute. This is what the glibc makefiles do. */
+ command_root = concat (argv[1], ".root", NULL);
+ if (strncmp (command_root, support_objdir_root,
+ strlen (support_objdir_root)) == 0
+ && command_root[strlen (support_objdir_root)] == '/')
+ command_root = concat (support_srcdir_root,
+ argv[1] + strlen (support_objdir_root),
+ ".root", NULL);
+ command_root = strdup (command_root);
+
+ /* This cuts off the ".root" we appended above. */
+ command_base = strdup (command_root);
+ command_base[strlen (command_base) - 5] = 0;
+
+ /* This is the basename of the test we're running. */
+ command_basename = strrchr (command_base, '/');
+ if (command_basename == NULL)
+ command_basename = command_base;
+ else
+ ++command_basename;
+
+ /* Shared object base directory. */
+ so_base = strdup (argv[1]);
+ if (strrchr (so_base, '/') != NULL)
+ strrchr (so_base, '/')[1] = 0;
+
+ if (file_exists (concat (command_root, "/postclean.req", NULL)))
+ do_postclean = 1;
+
+ rsync (pristine_root_path, new_root_path,
+ file_exists (concat (command_root, "/preclean.req", NULL)));
+
+ if (stat (command_root, &st) >= 0
+ && S_ISDIR (st.st_mode))
+ rsync (command_root, new_root_path, 0);
+
+ new_objdir_path = strdup (concat (new_root_path,
+ support_objdir_root, NULL));
+ new_srcdir_path = strdup (concat (new_root_path,
+ support_srcdir_root, NULL));
+
+ /* new_cwd_path starts with '/' so no "/" needed between the two. */
+ xmkdirp (concat (new_root_path, new_cwd_path, NULL), 0755);
+ xmkdirp (new_srcdir_path, 0755);
+ xmkdirp (new_objdir_path, 0755);
+
+ original_uid = getuid ();
+ original_gid = getgid ();
+
+ /* Handle the cp/mv/rm "script" here. */
+ {
+ char *the_line = NULL;
+ size_t line_len = 0;
+ char *fname = concat (command_root, "/",
+ command_basename, ".script", NULL);
+ char *the_words[3];
+ FILE *f = fopen (fname, "r");
+
+ if (verbose && f)
+ fprintf (stderr, "running %s\n", fname);
+
+ if (f == NULL)
+ {
+ /* Try foo.script instead of foo.root/foo.script, as a shortcut. */
+ fname = concat (command_base, ".script", NULL);
+ f = fopen (fname, "r");
+ if (verbose && f)
+ fprintf (stderr, "running %s\n", fname);
+ }
+
+ /* Note that we do NOT look for a Makefile-generated foo.script in
+ the build directory. If that is ever needed, this is the place
+ to add it. */
+
+ /* This is where we "interpret" the mini-script which is <test>.script. */
+ if (f != NULL)
+ {
+ while (getline (&the_line, &line_len, f) > 0)
+ {
+ int nt = tokenize (the_line, the_words, 3);
+ int i;
+
+ for (i = 1; i < nt; ++i)
+ {
+ if (memcmp (the_words[i], "$B/", 3) == 0)
+ the_words[i] = concat (support_objdir_root,
+ the_words[i] + 2, NULL);
+ else if (memcmp (the_words[i], "$S/", 3) == 0)
+ the_words[i] = concat (support_srcdir_root,
+ the_words[i] + 2, NULL);
+ else if (memcmp (the_words[i], "$I/", 3) == 0)
+ the_words[i] = concat (new_root_path,
+ support_install_prefix,
+ the_words[i] + 2, NULL);
+ else if (memcmp (the_words[i], "$L/", 3) == 0)
+ the_words[i] = concat (new_root_path,
+ support_libdir_prefix,
+ the_words[i] + 2, NULL);
+ else if (the_words[i][0] == '/')
+ the_words[i] = concat (new_root_path,
+ the_words[i], NULL);
+ }
+
+ if (nt == 3 && the_words[2][strlen (the_words[2]) - 1] == '/')
+ {
+ char *r = strrchr (the_words[1], '/');
+ if (r)
+ the_words[2] = concat (the_words[2], r + 1, NULL);
+ else
+ the_words[2] = concat (the_words[2], the_words[1], NULL);
+ }
+
+ if (nt == 2 && strcmp (the_words[0], "so") == 0)
+ {
+ the_words[2] = concat (new_root_path, support_libdir_prefix,
+ "/", the_words[1], NULL);
+ the_words[1] = concat (so_base, the_words[1], NULL);
+ copy_one_file (the_words[1], the_words[2]);
+ }
+ else if (nt == 3 && strcmp (the_words[0], "cp") == 0)
+ {
+ copy_one_file (the_words[1], the_words[2]);
+ }
+ else if (nt == 3 && strcmp (the_words[0], "mv") == 0)
+ {
+ if (rename (the_words[1], the_words[2]) < 0)
+ FAIL_EXIT1 ("rename %s -> %s: %s", the_words[1],
+ the_words[2], strerror (errno));
+ }
+ else if (nt == 3 && strcmp (the_words[0], "chmod") == 0)
+ {
+ long int m;
+ m = strtol (the_words[1], NULL, 0);
+ if (chmod (the_words[2], m) < 0)
+ FAIL_EXIT1 ("chmod %s: %s\n",
+ the_words[2], strerror (errno));
+
+ }
+ else if (nt == 2 && strcmp (the_words[0], "rm") == 0)
+ {
+ maybe_xunlink (the_words[1]);
+ }
+ else if (nt > 0 && the_words[0][0] != '#')
+ {
+ printf ("\033[31minvalid [%s]\033[0m\n", the_words[0]);
+ }
+ }
+ fclose (f);
+ }
+ }
+
+#ifdef CLONE_NEWNS
+ /* The unshare here gives us our own spaces and capabilities. */
+ if (unshare (CLONE_NEWUSER | CLONE_NEWPID | CLONE_NEWNS) < 0)
+ {
+ /* Older kernels may not support all the options. */
+ if (errno == EINVAL)
+ FAIL_UNSUPPORTED ("unable to unshare user/fs: %s", strerror (errno));
+ else
+ FAIL_EXIT1 ("unable to unshare user/fs: %s", strerror (errno));
+ }
+#else
+ /* Some targets may not support unshare at all. */
+ FAIL_UNSUPPORTED ("unshare support missing");
+#endif
+
+ /* Some systems, by default, all mounts leak out of the namespace. */
+ if (mount ("none", "/", NULL, MS_REC | MS_PRIVATE, NULL) != 0)
+ FAIL_EXIT1 ("could not create a private mount namespace\n");
+
+ trymount (support_srcdir_root, new_srcdir_path);
+ trymount (support_objdir_root, new_objdir_path);
+
+ xmkdirp (concat (new_root_path, "/dev", NULL), 0755);
+ devmount (new_root_path, "null");
+ devmount (new_root_path, "zero");
+ devmount (new_root_path, "urandom");
+
+ /* We're done with the "old" root, switch to the new one. */
+ if (chroot (new_root_path) < 0)
+ FAIL_EXIT1 ("Can't chroot to %s - ", new_root_path);
+
+ if (chdir (new_cwd_path) < 0)
+ FAIL_EXIT1 ("Can't cd to new %s - ", new_cwd_path);
+
+ /* To complete the containerization, we need to fork () at least
+ once. We can't exec, nor can we somehow link the new child to
+ our parent. So we run the child and propogate it's exit status
+ up. */
+ child = fork ();
+ if (child < 0)
+ FAIL_EXIT1 ("Unable to fork");
+ else if (child > 0)
+ {
+ /* Parent. */
+ int status;
+ waitpid (child, &status, 0);
+
+ /* There's a bit of magic here, since the buildroot is mounted
+ in our space, the paths are still valid, and since the mounts
+ aren't recursive, it sees *only* the built root, not anything
+ we would normally se if we rsync'd to "/" like mounted /dev
+ files. */
+ if (do_postclean)
+ rsync (pristine_root_path, new_root_path, 1);
+
+ if (WIFEXITED (status))
+ exit (WEXITSTATUS (status));
+
+ if (WIFSIGNALED (status))
+ {
+ printf ("%%SIGNALLED%%\n");
+ exit (77);
+ }
+
+ printf ("%%EXITERROR%%\n");
+ exit (78);
+ }
+
+ /* The rest is the child process, which is now PID 1 and "in" the
+ new root. */
+
+ maybe_xmkdir ("/tmp", 0755);
+
+ /* Now that we're pid 1 (effectively "root") we can mount /proc */
+ maybe_xmkdir ("/proc", 0777);
+ if (mount ("proc", "/proc", "proc", 0, NULL) < 0)
+ FAIL_EXIT1 ("Unable to mount /proc: ");
+
+ /* We map our original UID to the same UID in the container so we
+ can own our own files normally. */
+ UMAP = open ("/proc/self/uid_map", O_WRONLY);
+ if (UMAP < 0)
+ FAIL_EXIT1 ("can't write to /proc/self/uid_map\n");
+
+ sprintf (tmp, "%lld %lld 1\n",
+ (long long) original_uid, (long long) original_uid);
+ write (UMAP, tmp, strlen (tmp));
+ xclose (UMAP);
+
+ /* We must disable setgroups () before we can map our groups, else we
+ get EPERM. */
+ GMAP = open ("/proc/self/setgroups", O_WRONLY);
+ if (GMAP >= 0)
+ {
+ /* We support kernels old enough to not have this. */
+ write (GMAP, "deny\n", 5);
+ xclose (GMAP);
+ }
+
+ /* We map our original GID to the same GID in the container so we
+ can own our own files normally. */
+ GMAP = open ("/proc/self/gid_map", O_WRONLY);
+ if (GMAP < 0)
+ FAIL_EXIT1 ("can't write to /proc/self/gid_map\n");
+
+ sprintf (tmp, "%lld %lld 1\n",
+ (long long) original_gid, (long long) original_gid);
+ write (GMAP, tmp, strlen (tmp));
+ xclose (GMAP);
+
+ /* Now run the child. */
+ execvp (new_child_proc[0], new_child_proc);
+
+ /* Or don't run the child? */
+ FAIL_EXIT1 ("Unable to exec %s\n", new_child_proc[0]);
+
+ /* Because gcc won't know error () never returns... */
+ exit (EXIT_UNSUPPORTED);
+}
projects / thirdparty / glibc.git / commitdiff
