Add a standalone makedevs application to be used along with
fakeroot to construct target device nodes for filesystems
and utilities (such as tar) that do not currently support
device tables natively.
diff --git a/target/makedevs/makedevs.c b/target/makedevs/makedevs.c
new file mode 100644
index 0000000..d2b3a2a
--- /dev/null
+++ b/target/makedevs/makedevs.c
@@ -0,0 +1,479 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program 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 Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ */
+
+#define _GNU_SOURCE
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <fcntl.h>
+#include <getopt.h>
+#include <time.h>
+#include <pwd.h>
+#include <grp.h>
+#include <unistd.h>
+#include <errno.h>
+#include <stdarg.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <sys/sysmacros.h> /* major() and minor() */
+
+
+const char *bb_applet_name;
+
+void bb_verror_msg(const char *s, va_list p)
+{
+ fflush(stdout);
+ fprintf(stderr, "%s: ", bb_applet_name);
+ vfprintf(stderr, s, p);
+}
+
+void bb_error_msg(const char *s, ...)
+{
+ va_list p;
+
+ va_start(p, s);
+ bb_verror_msg(s, p);
+ va_end(p);
+ putc('\n', stderr);
+}
+
+void bb_error_msg_and_die(const char *s, ...)
+{
+ va_list p;
+
+ va_start(p, s);
+ bb_verror_msg(s, p);
+ va_end(p);
+ putc('\n', stderr);
+ exit(1);
+}
+void bb_vperror_msg(const char *s, va_list p)
+{
+ int err=errno;
+ if(s == 0) s = "";
+ bb_verror_msg(s, p);
+ if (*s) s = ": ";
+ fprintf(stderr, "%s%s\n", s, strerror(err));
+}
+
+void bb_perror_msg(const char *s, ...)
+{
+ va_list p;
+
+ va_start(p, s);
+ bb_vperror_msg(s, p);
+ va_end(p);
+}
+
+void bb_perror_msg_and_die(const char *s, ...)
+{
+ va_list p;
+
+ va_start(p, s);
+ bb_vperror_msg(s, p);
+ va_end(p);
+ exit(1);
+}
+
+FILE *bb_xfopen(const char *path, const char *mode)
+{
+ FILE *fp;
+ if ((fp = fopen(path, mode)) == NULL)
+ bb_perror_msg_and_die("%s", path);
+ return fp;
+}
+
+int bb_make_directory (char *path, long mode, int flags)
+{
+ mode_t mask;
+ const char *fail_msg;
+ char *s = path;
+ char c;
+ struct stat st;
+ enum {
+ FILEUTILS_PRESERVE_STATUS = 1,
+ FILEUTILS_DEREFERENCE = 2,
+ FILEUTILS_RECUR = 4,
+ FILEUTILS_FORCE = 8,
+ FILEUTILS_INTERACTIVE = 16
+ };
+
+ mask = umask(0);
+ if (mode == -1) {
+ umask(mask);
+ mode = (S_IXUSR | S_IXGRP | S_IXOTH |
+ S_IWUSR | S_IWGRP | S_IWOTH |
+ S_IRUSR | S_IRGRP | S_IROTH) & ~mask;
+ } else {
+ umask(mask & ~0300);
+ }
+
+ do {
+ c = 0;
+
+ if (flags & FILEUTILS_RECUR) { /* Get the parent. */
+ /* Bypass leading non-'/'s and then subsequent '/'s. */
+ while (*s) {
+ if (*s == '/') {
+ do {
+ ++s;
+ } while (*s == '/');
+ c = *s; /* Save the current char */
+ *s = 0; /* and replace it with nul. */
+ break;
+ }
+ ++s;
+ }
+ }
+
+ if (mkdir(path, 0777) < 0) {
+ /* If we failed for any other reason than the directory
+ * already exists, output a diagnostic and return -1.*/
+ if (errno != EEXIST
+ || !(flags & FILEUTILS_RECUR)
+ || (stat(path, &st) < 0 || !S_ISDIR(st.st_mode))) {
+ fail_msg = "create";
+ umask(mask);
+ break;
+ }
+ /* Since the directory exists, don't attempt to change
+ * permissions if it was the full target. Note that
+ * this is not an error conditon. */
+ if (!c) {
+ umask(mask);
+ return 0;
+ }
+ }
+
+ if (!c) {
+ /* Done. If necessary, updated perms on the newly
+ * created directory. Failure to update here _is_
+ * an error.*/
+ umask(mask);
+ if ((mode != -1) && (chmod(path, mode) < 0)){
+ fail_msg = "set permissions of";
+ break;
+ }
+ return 0;
+ }
+
+ /* Remove any inserted nul from the path (recursive mode). */
+ *s = c;
+
+ } while (1);
+
+ bb_perror_msg ("Cannot %s directory `%s'", fail_msg, path);
+ return -1;
+}
+
+const char * const bb_msg_memory_exhausted = "memory exhausted";
+
+void *xmalloc(size_t size)
+{
+ void *ptr = malloc(size);
+ if (ptr == NULL && size != 0)
+ bb_error_msg_and_die(bb_msg_memory_exhausted);
+ return ptr;
+}
+
+void *xcalloc(size_t nmemb, size_t size)
+{
+ void *ptr = calloc(nmemb, size);
+ if (ptr == NULL && nmemb != 0 && size != 0)
+ bb_error_msg_and_die(bb_msg_memory_exhausted);
+ return ptr;
+}
+
+void *xrealloc(void *ptr, size_t size)
+{
+ ptr = realloc(ptr, size);
+ if (ptr == NULL && size != 0)
+ bb_error_msg_and_die(bb_msg_memory_exhausted);
+ return ptr;
+}
+
+char *private_get_line_from_file(FILE *file, int c)
+{
+#define GROWBY (80) /* how large we will grow strings by */
+
+ int ch;
+ int idx = 0;
+ char *linebuf = NULL;
+ int linebufsz = 0;
+
+ while ((ch = getc(file)) != EOF) {
+ /* grow the line buffer as necessary */
+ if (idx > linebufsz - 2) {
+ linebuf = xrealloc(linebuf, linebufsz += GROWBY);
+ }
+ linebuf[idx++] = (char)ch;
+ if (!ch) return linebuf;
+ if (c<2 && ch == '\n') {
+ if (c) {
+ --idx;
+ }
+ break;
+ }
+ }
+ if (linebuf) {
+ if (ferror(file)) {
+ free(linebuf);
+ return NULL;
+ }
+ linebuf[idx] = 0;
+ }
+ return linebuf;
+}
+
+char *bb_get_chomped_line_from_file(FILE *file)
+{
+ return private_get_line_from_file(file, 1);
+}
+
+long my_getpwnam(const char *name)
+{
+ struct passwd *myuser;
+
+ myuser = getpwnam(name);
+ if (myuser==NULL)
+ bb_error_msg_and_die("unknown user name: %s", name);
+
+ return myuser->pw_uid;
+}
+
+long my_getgrnam(const char *name)
+{
+ struct group *mygroup;
+
+ mygroup = getgrnam(name);
+ if (mygroup==NULL)
+ bb_error_msg_and_die("unknown group name: %s", name);
+
+ return (mygroup->gr_gid);
+}
+
+unsigned long get_ug_id(const char *s, long (*my_getxxnam)(const char *))
+{
+ unsigned long r;
+ char *p;
+
+ r = strtoul(s, &p, 10);
+ if (*p || (s == p)) {
+ r = my_getxxnam(s);
+ }
+
+ return r;
+}
+
+char * last_char_is(const char *s, int c)
+{
+ char *sret = (char *)s;
+ if (sret) {
+ sret = strrchr(sret, c);
+ if(sret != NULL && *(sret+1) != 0)
+ sret = NULL;
+ }
+ return sret;
+}
+
+void bb_xasprintf(char **string_ptr, const char *format, ...)
+{
+ va_list p;
+ int r;
+
+ va_start(p, format);
+ r = vasprintf(string_ptr, format, p);
+ va_end(p);
+
+ if (r < 0) {
+ bb_perror_msg_and_die("bb_xasprintf");
+ }
+}
+
+char *concat_path_file(const char *path, const char *filename)
+{
+ char *outbuf;
+ char *lc;
+
+ if (!path)
+ path = "";
+ lc = last_char_is(path, '/');
+ while (*filename == '/')
+ filename++;
+ bb_xasprintf(&outbuf, "%s%s%s", path, (lc==NULL ? "/" : ""), filename);
+
+ return outbuf;
+}
+
+int main(int argc, char **argv)
+{
+ int opt;
+ FILE *table = stdin;
+ char *rootdir = "./";
+ char *line;
+ int ret = EXIT_SUCCESS;
+
+ bb_applet_name = argv[0];
+
+ while ((opt = getopt(argc, argv, "d:r:")) != -1) {
+ switch(opt) {
+ case 'd':
+ table = bb_xfopen(optarg, "r");
+ break;
+ case 'n':
+ rootdir = optarg;
+ break;
+ default:
+ fprintf(stderr, "%s: [-r rootdir] [device_table]\n\n", bb_applet_name);
+ fprintf(stderr, "Creates a batch of special files as specified in a device table.\n");
+ fprintf(stderr, "Device table entries take the form of:\n");
+ fprintf(stderr, "type mode user group major minor start increment count\n\n");
+ fprintf(stderr, "Where name is the file name, type can be one of:\n");
+ fprintf(stderr, " f A regular file\n");
+ fprintf(stderr, " d Directory\n");
+ fprintf(stderr, " c Character special device file\n");
+ fprintf(stderr, " b Block special device file\n");
+ fprintf(stderr, " p Fifo (named pipe)\n");
+ fprintf(stderr, "uid is the user id for the target file, gid is the group id for the\n");
+ fprintf(stderr, "target file. The rest of the entries (major, minor, etc) apply to\n");
+ fprintf(stderr, "to device special files. A '-' may be used for blank entries.\n\n");
+ fprintf(stderr, "For example:\n");
+ fprintf(stderr, "<name> <type> <mode> <uid> <gid> <major> <minor> <start> <inc> <count>\n");
+ fprintf(stderr, "/dev d 755 0 0 - - - - -\n");
+ fprintf(stderr, "/dev/console c 666 0 0 5 1 - - -\n");
+ fprintf(stderr, "/dev/null c 666 0 0 1 3 0 0 -\n");
+ fprintf(stderr, "/dev/zero c 666 0 0 1 5 0 0 -\n");
+ fprintf(stderr, "/dev/hda b 640 0 0 3 0 0 0 -\n");
+ fprintf(stderr, "/dev/hda b 640 0 0 3 1 1 1 15\n\n");
+ fprintf(stderr, "Will Produce:\n");
+ fprintf(stderr, "/dev\n");
+ fprintf(stderr, "/dev/console\n");
+ fprintf(stderr, "/dev/null\n");
+ fprintf(stderr, "/dev/zero\n");
+ fprintf(stderr, "/dev/hda\n");
+ fprintf(stderr, "/dev/hda[0-15]\n");
+ exit(1);
+ }
+ }
+
+
+ if (chdir(rootdir) == -1) {
+ bb_perror_msg_and_die("Couldnt chdir to %s", rootdir);
+ }
+
+ umask(0);
+
+ while ((line = bb_get_chomped_line_from_file(table))) {
+ char type;
+ unsigned int mode = 0755;
+ unsigned int major = 0;
+ unsigned int minor = 0;
+ unsigned int count = 0;
+ unsigned int increment = 0;
+ unsigned int start = 0;
+ char name[41];
+ char user[41];
+ char group[41];
+ char *full_name;
+ uid_t uid;
+ gid_t gid;
+
+ if ((2 > sscanf(line, "%40s %c %o %40s %40s %u %u %u %u %u", name,
+ &type, &mode, user, group, &major,
+ &minor, &start, &increment, &count)) ||
+ ((major | minor | start | count | increment) > 255)) {
+ bb_error_msg("Ignoring invalid line\n%s\n", line);
+ ret = EXIT_FAILURE;
+ continue;
+ }
+ if (name[0] == '#') {
+ continue;
+ }
+ if (group) {
+ gid = get_ug_id(group, my_getgrnam);
+ } else {
+ gid = getgid();
+ }
+ if (user) {
+ uid = get_ug_id(user, my_getpwnam);
+ } else {
+ uid = getuid();
+ }
+ full_name = concat_path_file(rootdir, name);
+
+ if (type == 'd') {
+ bb_make_directory(full_name, mode | S_IFDIR, 0);
+ if (chown(full_name, uid, gid) == -1) {
+ bb_perror_msg("chown failed for %s", full_name);
+ ret = EXIT_FAILURE;
+ goto loop;
+ }
+ } else {
+ dev_t rdev;
+
+ if (type == 'p') {
+ mode |= S_IFIFO;
+ }
+ else if (type == 'c') {
+ mode |= S_IFCHR;
+ }
+ else if (type == 'b') {
+ mode |= S_IFBLK;
+ } else {
+ bb_error_msg("Unsupported file type %c", type);
+ ret = EXIT_FAILURE;
+ goto loop;
+ }
+
+ if (count > 0) {
+ int i;
+ char *full_name_inc;
+
+ full_name_inc = xmalloc(strlen(full_name) + 4);
+ for (i = start; i < count; i++) {
+ sprintf(full_name_inc, "%s%d", full_name, i);
+ rdev = (major << 8) + minor + (i * increment - start);
+ if (mknod(full_name_inc, mode, rdev) == -1) {
+ bb_perror_msg("Couldnt create node %s", full_name_inc);
+ ret = EXIT_FAILURE;
+ }
+ else if (chown(full_name_inc, uid, gid) == -1) {
+ bb_perror_msg("chown failed for %s", full_name_inc);
+ ret = EXIT_FAILURE;
+ }
+ }
+ free(full_name_inc);
+ } else {
+ rdev = (major << 8) + minor;
+ if (mknod(full_name, mode, rdev) == -1) {
+ bb_perror_msg("Couldnt create node %s", full_name);
+ ret = EXIT_FAILURE;
+ }
+ else if (chown(full_name, uid, gid) == -1) {
+ bb_perror_msg("chown failed for %s", full_name);
+ ret = EXIT_FAILURE;
+ }
+ }
+ }
+loop:
+ free(line);
+ free(full_name);
+ }
+ fclose(table);
+
+ return 0;
+}