[T106][ZXW-22]7520V3SCV2.01.01.02P42U09_VEC_V0.8_AP_VEC origin source commit
Change-Id: Ic6e05d89ecd62fc34f82b23dcf306c93764aec4b
diff --git a/ap/app/busybox/src/miscutils/devfsd.c b/ap/app/busybox/src/miscutils/devfsd.c
new file mode 100644
index 0000000..24c953b
--- /dev/null
+++ b/ap/app/busybox/src/miscutils/devfsd.c
@@ -0,0 +1,1809 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
+ */
+
+/*
+ devfsd implementation for busybox
+
+ Copyright (C) 2003 by Tito Ragusa <farmatito@tiscali.it>
+
+ Busybox version is based on some previous work and ideas
+ Copyright (C) [2003] by [Matteo Croce] <3297627799@wind.it>
+
+ devfsd.c
+
+ Main file for devfsd (devfs daemon for Linux).
+
+ Copyright (C) 1998-2002 Richard Gooch
+
+ devfsd.h
+
+ Header file for devfsd (devfs daemon for Linux).
+
+ Copyright (C) 1998-2000 Richard Gooch
+
+ compat_name.c
+
+ Compatibility name file for devfsd (build compatibility names).
+
+ Copyright (C) 1998-2002 Richard Gooch
+
+ expression.c
+
+ This code provides Borne Shell-like expression expansion.
+
+ Copyright (C) 1997-1999 Richard Gooch
+
+ This program 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 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 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+ Richard Gooch may be reached by email at rgooch@atnf.csiro.au
+ The postal address is:
+ Richard Gooch, c/o ATNF, P. O. Box 76, Epping, N.S.W., 2121, Australia.
+*/
+
+//usage:#define devfsd_trivial_usage
+//usage: "mntpnt [-v]" IF_DEVFSD_FG_NP("[-fg][-np]")
+//usage:#define devfsd_full_usage "\n\n"
+//usage: "Manage devfs permissions and old device name symlinks\n"
+//usage: "\n mntpnt The mount point where devfs is mounted"
+//usage: "\n -v Print the protocol version numbers for devfsd"
+//usage: "\n and the kernel-side protocol version and exit"
+//usage: IF_DEVFSD_FG_NP(
+//usage: "\n -fg Run in foreground"
+//usage: "\n -np Exit after parsing the configuration file"
+//usage: "\n and processing synthetic REGISTER events,"
+//usage: "\n don't poll for events"
+//usage: )
+
+#include "libbb.h"
+#include "xregex.h"
+#include <syslog.h>
+
+#include <sys/un.h>
+#include <sys/sysmacros.h>
+
+/* Various defines taken from linux/major.h */
+#define IDE0_MAJOR 3
+#define IDE1_MAJOR 22
+#define IDE2_MAJOR 33
+#define IDE3_MAJOR 34
+#define IDE4_MAJOR 56
+#define IDE5_MAJOR 57
+#define IDE6_MAJOR 88
+#define IDE7_MAJOR 89
+#define IDE8_MAJOR 90
+#define IDE9_MAJOR 91
+
+
+/* Various defines taken from linux/devfs_fs.h */
+#define DEVFSD_PROTOCOL_REVISION_KERNEL 5
+#define DEVFSD_IOCTL_BASE 'd'
+/* These are the various ioctls */
+#define DEVFSDIOC_GET_PROTO_REV _IOR(DEVFSD_IOCTL_BASE, 0, int)
+#define DEVFSDIOC_SET_EVENT_MASK _IOW(DEVFSD_IOCTL_BASE, 2, int)
+#define DEVFSDIOC_RELEASE_EVENT_QUEUE _IOW(DEVFSD_IOCTL_BASE, 3, int)
+#define DEVFSDIOC_SET_CONFIG_DEBUG_MASK _IOW(DEVFSD_IOCTL_BASE, 4, int)
+#define DEVFSD_NOTIFY_REGISTERED 0
+#define DEVFSD_NOTIFY_UNREGISTERED 1
+#define DEVFSD_NOTIFY_ASYNC_OPEN 2
+#define DEVFSD_NOTIFY_CLOSE 3
+#define DEVFSD_NOTIFY_LOOKUP 4
+#define DEVFSD_NOTIFY_CHANGE 5
+#define DEVFSD_NOTIFY_CREATE 6
+#define DEVFSD_NOTIFY_DELETE 7
+#define DEVFS_PATHLEN 1024
+/* Never change this otherwise the binary interface will change */
+
+struct devfsd_notify_struct {
+ /* Use native C types to ensure same types in kernel and user space */
+ unsigned int type; /* DEVFSD_NOTIFY_* value */
+ unsigned int mode; /* Mode of the inode or device entry */
+ unsigned int major; /* Major number of device entry */
+ unsigned int minor; /* Minor number of device entry */
+ unsigned int uid; /* Uid of process, inode or device entry */
+ unsigned int gid; /* Gid of process, inode or device entry */
+ unsigned int overrun_count; /* Number of lost events */
+ unsigned int namelen; /* Number of characters not including '\0' */
+ /* The device name MUST come last */
+ char devname[DEVFS_PATHLEN]; /* This will be '\0' terminated */
+};
+
+#define BUFFER_SIZE 16384
+#define DEVFSD_VERSION "1.3.25"
+#define CONFIG_FILE "/etc/devfsd.conf"
+#define MODPROBE "/sbin/modprobe"
+#define MODPROBE_SWITCH_1 "-k"
+#define MODPROBE_SWITCH_2 "-C"
+#define CONFIG_MODULES_DEVFS "/etc/modules.devfs"
+#define MAX_ARGS (6 + 1)
+#define MAX_SUBEXPR 10
+#define STRING_LENGTH 255
+
+/* for get_uid_gid() */
+#define UID 0
+#define GID 1
+
+/* fork_and_execute() */
+# define DIE 1
+# define NO_DIE 0
+
+/* for dir_operation() */
+#define RESTORE 0
+#define SERVICE 1
+#define READ_CONFIG 2
+
+/* Update only after changing code to reflect new protocol */
+#define DEVFSD_PROTOCOL_REVISION_DAEMON 5
+
+/* Compile-time check */
+#if DEVFSD_PROTOCOL_REVISION_KERNEL != DEVFSD_PROTOCOL_REVISION_DAEMON
+#error protocol version mismatch. Update your kernel headers
+#endif
+
+#define AC_PERMISSIONS 0
+#define AC_MODLOAD 1
+#define AC_EXECUTE 2
+#define AC_MFUNCTION 3 /* not supported by busybox */
+#define AC_CFUNCTION 4 /* not supported by busybox */
+#define AC_COPY 5
+#define AC_IGNORE 6
+#define AC_MKOLDCOMPAT 7
+#define AC_MKNEWCOMPAT 8
+#define AC_RMOLDCOMPAT 9
+#define AC_RMNEWCOMPAT 10
+#define AC_RESTORE 11
+
+struct permissions_type {
+ mode_t mode;
+ uid_t uid;
+ gid_t gid;
+};
+
+struct execute_type {
+ char *argv[MAX_ARGS + 1]; /* argv[0] must always be the programme */
+};
+
+struct copy_type {
+ const char *source;
+ const char *destination;
+};
+
+struct action_type {
+ unsigned int what;
+ unsigned int when;
+};
+
+struct config_entry_struct {
+ struct action_type action;
+ regex_t preg;
+ union
+ {
+ struct permissions_type permissions;
+ struct execute_type execute;
+ struct copy_type copy;
+ }
+ u;
+ struct config_entry_struct *next;
+};
+
+struct get_variable_info {
+ const struct devfsd_notify_struct *info;
+ const char *devname;
+ char devpath[STRING_LENGTH];
+};
+
+static void dir_operation(int , const char * , int, unsigned long*);
+static void service(struct stat statbuf, char *path);
+static int st_expr_expand(char *, unsigned, const char *, const char *(*)(const char *, void *), void *);
+static const char *get_old_name(const char *, unsigned, char *, unsigned, unsigned);
+static int mksymlink(const char *oldpath, const char *newpath);
+static void read_config_file(char *path, int optional, unsigned long *event_mask);
+static void process_config_line(const char *, unsigned long *);
+static int do_servicing(int, unsigned long);
+static void service_name(const struct devfsd_notify_struct *);
+static void action_permissions(const struct devfsd_notify_struct *, const struct config_entry_struct *);
+static void action_execute(const struct devfsd_notify_struct *, const struct config_entry_struct *,
+ const regmatch_t *, unsigned);
+static void action_modload(const struct devfsd_notify_struct *info, const struct config_entry_struct *entry);
+static void action_copy(const struct devfsd_notify_struct *, const struct config_entry_struct *,
+ const regmatch_t *, unsigned);
+static void action_compat(const struct devfsd_notify_struct *, unsigned);
+static void free_config(void);
+static void restore(char *spath, struct stat source_stat, int rootlen);
+static int copy_inode(const char *, const struct stat *, mode_t, const char *, const struct stat *);
+static mode_t get_mode(const char *);
+static void signal_handler(int);
+static const char *get_variable(const char *, void *);
+static int make_dir_tree(const char *);
+static int expand_expression(char *, unsigned, const char *, const char *(*)(const char *, void *), void *,
+ const char *, const regmatch_t *, unsigned);
+static void expand_regexp(char *, size_t, const char *, const char *, const regmatch_t *, unsigned);
+static const char *expand_variable( char *, unsigned, unsigned *, const char *,
+ const char *(*)(const char *, void *), void *);
+static const char *get_variable_v2(const char *, const char *(*)(const char *, void *), void *);
+static char get_old_ide_name(unsigned, unsigned);
+static char *write_old_sd_name(char *, unsigned, unsigned, const char *);
+
+/* busybox functions */
+static int get_uid_gid(int flag, const char *string);
+static void safe_memcpy(char * dest, const char * src, int len);
+static unsigned int scan_dev_name_common(const char *d, unsigned int n, int addendum, const char *ptr);
+static unsigned int scan_dev_name(const char *d, unsigned int n, const char *ptr);
+
+/* Structs and vars */
+static struct config_entry_struct *first_config = NULL;
+static struct config_entry_struct *last_config = NULL;
+static char *mount_point = NULL;
+static volatile int caught_signal = FALSE;
+static volatile int caught_sighup = FALSE;
+static struct initial_symlink_struct {
+ const char *dest;
+ const char *name;
+} initial_symlinks[] = {
+ {"/proc/self/fd", "fd"},
+ {"fd/0", "stdin"},
+ {"fd/1", "stdout"},
+ {"fd/2", "stderr"},
+ {NULL, NULL},
+};
+
+static struct event_type {
+ unsigned int type; /* The DEVFSD_NOTIFY_* value */
+ const char *config_name; /* The name used in the config file */
+} event_types[] = {
+ {DEVFSD_NOTIFY_REGISTERED, "REGISTER"},
+ {DEVFSD_NOTIFY_UNREGISTERED, "UNREGISTER"},
+ {DEVFSD_NOTIFY_ASYNC_OPEN, "ASYNC_OPEN"},
+ {DEVFSD_NOTIFY_CLOSE, "CLOSE"},
+ {DEVFSD_NOTIFY_LOOKUP, "LOOKUP"},
+ {DEVFSD_NOTIFY_CHANGE, "CHANGE"},
+ {DEVFSD_NOTIFY_CREATE, "CREATE"},
+ {DEVFSD_NOTIFY_DELETE, "DELETE"},
+ {0xffffffff, NULL}
+};
+
+/* Busybox messages */
+
+static const char bb_msg_proto_rev[] ALIGN1 = "protocol revision";
+static const char bb_msg_bad_config[] ALIGN1 = "bad %s config file: %s";
+static const char bb_msg_small_buffer[] ALIGN1 = "buffer too small";
+static const char bb_msg_variable_not_found[] ALIGN1 = "variable: %s not found";
+
+/* Busybox stuff */
+#if ENABLE_DEVFSD_VERBOSE || ENABLE_DEBUG
+#define info_logger(p, fmt, args...) bb_info_msg(fmt, ## args)
+#define msg_logger(p, fmt, args...) bb_error_msg(fmt, ## args)
+#define msg_logger_and_die(p, fmt, args...) bb_error_msg_and_die(fmt, ## args)
+#define error_logger(p, fmt, args...) bb_perror_msg(fmt, ## args)
+#define error_logger_and_die(p, fmt, args...) bb_perror_msg_and_die(fmt, ## args)
+#else
+#define info_logger(p, fmt, args...)
+#define msg_logger(p, fmt, args...)
+#define msg_logger_and_die(p, fmt, args...) exit(EXIT_FAILURE)
+#define error_logger(p, fmt, args...)
+#define error_logger_and_die(p, fmt, args...) exit(EXIT_FAILURE)
+#endif
+
+static void safe_memcpy(char *dest, const char *src, int len)
+{
+ memcpy(dest , src, len);
+ dest[len] = '\0';
+}
+
+static unsigned int scan_dev_name_common(const char *d, unsigned int n, int addendum, const char *ptr)
+{
+ if (d[n - 4] == 'd' && d[n - 3] == 'i' && d[n - 2] == 's' && d[n - 1] == 'c')
+ return 2 + addendum;
+ if (d[n - 2] == 'c' && d[n - 1] == 'd')
+ return 3 + addendum;
+ if (ptr[0] == 'p' && ptr[1] == 'a' && ptr[2] == 'r' && ptr[3] == 't')
+ return 4 + addendum;
+ if (ptr[n - 2] == 'm' && ptr[n - 1] == 't')
+ return 5 + addendum;
+ return 0;
+}
+
+static unsigned int scan_dev_name(const char *d, unsigned int n, const char *ptr)
+{
+ if (d[0] == 's' && d[1] == 'c' && d[2] == 's' && d[3] == 'i' && d[4] == '/') {
+ if (d[n - 7] == 'g' && d[n - 6] == 'e' && d[n - 5] == 'n'
+ && d[n - 4] == 'e' && d[n - 3] == 'r' && d[n - 2] == 'i' && d[n - 1] == 'c'
+ )
+ return 1;
+ return scan_dev_name_common(d, n, 0, ptr);
+ }
+ if (d[0] == 'i' && d[1] == 'd' && d[2] == 'e' && d[3] == '/'
+ && d[4] == 'h' && d[5] == 'o' && d[6] == 's' && d[7] == 't'
+ )
+ return scan_dev_name_common(d, n, 4, ptr);
+ if (d[0] == 's' && d[1] == 'b' && d[2] == 'p' && d[3] == '/')
+ return 10;
+ if (d[0] == 'v' && d[1] == 'c' && d[2] == 'c' && d[3] == '/')
+ return 11;
+ if (d[0] == 'p' && d[1] == 't' && d[2] == 'y' && d[3] == '/')
+ return 12;
+ return 0;
+}
+
+/* Public functions follow */
+
+int devfsd_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int devfsd_main(int argc, char **argv)
+{
+ int print_version = FALSE;
+ int do_daemon = TRUE;
+ int no_polling = FALSE;
+ int do_scan;
+ int fd, proto_rev, count;
+ unsigned long event_mask = 0;
+ struct sigaction new_action;
+ struct initial_symlink_struct *curr;
+
+ if (argc < 2)
+ bb_show_usage();
+
+ for (count = 2; count < argc; ++count) {
+ if (argv[count][0] == '-') {
+ if (argv[count][1] == 'v' && !argv[count][2]) /* -v */
+ print_version = TRUE;
+ else if (ENABLE_DEVFSD_FG_NP && argv[count][1] == 'f'
+ && argv[count][2] == 'g' && !argv[count][3]) /* -fg */
+ do_daemon = FALSE;
+ else if (ENABLE_DEVFSD_FG_NP && argv[count][1] == 'n'
+ && argv[count][2] == 'p' && !argv[count][3]) /* -np */
+ no_polling = TRUE;
+ else
+ bb_show_usage();
+ }
+ }
+
+ mount_point = bb_simplify_path(argv[1]);
+
+ xchdir(mount_point);
+
+ fd = xopen(".devfsd", O_RDONLY);
+ close_on_exec_on(fd);
+ xioctl(fd, DEVFSDIOC_GET_PROTO_REV, &proto_rev);
+
+ /*setup initial entries */
+ for (curr = initial_symlinks; curr->dest != NULL; ++curr)
+ symlink(curr->dest, curr->name);
+
+ /* NB: The check for CONFIG_FILE is done in read_config_file() */
+
+ if (print_version || (DEVFSD_PROTOCOL_REVISION_DAEMON != proto_rev)) {
+ printf("%s v%s\nDaemon %s:\t%d\nKernel-side %s:\t%d\n",
+ applet_name, DEVFSD_VERSION, bb_msg_proto_rev,
+ DEVFSD_PROTOCOL_REVISION_DAEMON, bb_msg_proto_rev, proto_rev);
+ if (DEVFSD_PROTOCOL_REVISION_DAEMON != proto_rev)
+ bb_error_msg_and_die("%s mismatch!", bb_msg_proto_rev);
+ exit(EXIT_SUCCESS); /* -v */
+ }
+ /* Tell kernel we are special(i.e. we get to see hidden entries) */
+ xioctl(fd, DEVFSDIOC_SET_EVENT_MASK, 0);
+
+ /* Set up SIGHUP and SIGUSR1 handlers */
+ sigemptyset(&new_action.sa_mask);
+ new_action.sa_flags = 0;
+ new_action.sa_handler = signal_handler;
+ sigaction_set(SIGHUP, &new_action);
+ sigaction_set(SIGUSR1, &new_action);
+
+ printf("%s v%s started for %s\n", applet_name, DEVFSD_VERSION, mount_point);
+
+ /* Set umask so that mknod(2), open(2) and mkdir(2) have complete control over permissions */
+ umask(0);
+ read_config_file((char*)CONFIG_FILE, FALSE, &event_mask);
+ /* Do the scan before forking, so that boot scripts see the finished product */
+ dir_operation(SERVICE, mount_point, 0, NULL);
+
+ if (ENABLE_DEVFSD_FG_NP && no_polling)
+ exit(EXIT_SUCCESS);
+
+ if (ENABLE_DEVFSD_VERBOSE || ENABLE_DEBUG)
+ logmode = LOGMODE_BOTH;
+ else if (do_daemon == TRUE)
+ logmode = LOGMODE_SYSLOG;
+ /* This is the default */
+ /*else
+ logmode = LOGMODE_STDIO; */
+
+ if (do_daemon) {
+ /* Release so that the child can grab it */
+ xioctl(fd, DEVFSDIOC_RELEASE_EVENT_QUEUE, 0);
+ bb_daemonize_or_rexec(0, argv);
+ } else if (ENABLE_DEVFSD_FG_NP) {
+ setpgid(0, 0); /* Become process group leader */
+ }
+
+ while (TRUE) {
+ do_scan = do_servicing(fd, event_mask);
+
+ free_config();
+ read_config_file((char*)CONFIG_FILE, FALSE, &event_mask);
+ if (do_scan)
+ dir_operation(SERVICE, mount_point, 0, NULL);
+ }
+ if (ENABLE_FEATURE_CLEAN_UP) free(mount_point);
+} /* End Function main */
+
+
+/* Private functions follow */
+
+static void read_config_file(char *path, int optional, unsigned long *event_mask)
+/* [SUMMARY] Read a configuration database.
+ <path> The path to read the database from. If this is a directory, all
+ entries in that directory will be read(except hidden entries).
+ <optional> If TRUE, the routine will silently ignore a missing config file.
+ <event_mask> The event mask is written here. This is not initialised.
+ [RETURNS] Nothing.
+*/
+{
+ struct stat statbuf;
+ FILE *fp;
+ char buf[STRING_LENGTH];
+ char *line = NULL;
+ char *p;
+
+ if (stat(path, &statbuf) == 0) {
+ /* Don't read 0 length files: ignored */
+ /*if (statbuf.st_size == 0)
+ return;*/
+ if (S_ISDIR(statbuf.st_mode)) {
+ p = bb_simplify_path(path);
+ dir_operation(READ_CONFIG, p, 0, event_mask);
+ free(p);
+ return;
+ }
+ fp = fopen_for_read(path);
+ if (fp != NULL) {
+ while (fgets(buf, STRING_LENGTH, fp) != NULL) {
+ /* Skip whitespace */
+ line = buf;
+ line = skip_whitespace(line);
+ if (line[0] == '\0' || line[0] == '#')
+ continue;
+ process_config_line(line, event_mask);
+ }
+ fclose(fp);
+ } else {
+ goto read_config_file_err;
+ }
+ } else {
+read_config_file_err:
+ if (optional == 0 && errno == ENOENT)
+ error_logger_and_die(LOG_ERR, "read config file: %s", path);
+ }
+} /* End Function read_config_file */
+
+static void process_config_line(const char *line, unsigned long *event_mask)
+/* [SUMMARY] Process a line from a configuration file.
+ <line> The configuration line.
+ <event_mask> The event mask is written here. This is not initialised.
+ [RETURNS] Nothing.
+*/
+{
+ int num_args, count;
+ struct config_entry_struct *new;
+ char p[MAX_ARGS][STRING_LENGTH];
+ char when[STRING_LENGTH], what[STRING_LENGTH];
+ char name[STRING_LENGTH];
+ const char *msg = "";
+ char *ptr;
+ int i;
+
+ /* !!!! Only Uppercase Keywords in devsfd.conf */
+ static const char options[] ALIGN1 =
+ "CLEAR_CONFIG\0""INCLUDE\0""OPTIONAL_INCLUDE\0"
+ "RESTORE\0""PERMISSIONS\0""MODLOAD\0""EXECUTE\0"
+ "COPY\0""IGNORE\0""MKOLDCOMPAT\0""MKNEWCOMPAT\0"
+ "RMOLDCOMPAT\0""RMNEWCOMPAT\0";
+
+ for (count = 0; count < MAX_ARGS; ++count)
+ p[count][0] = '\0';
+ num_args = sscanf(line, "%s %s %s %s %s %s %s %s %s %s",
+ when, name, what,
+ p[0], p[1], p[2], p[3], p[4], p[5], p[6]);
+
+ i = index_in_strings(options, when);
+
+ /* "CLEAR_CONFIG" */
+ if (i == 0) {
+ free_config();
+ *event_mask = 0;
+ return;
+ }
+
+ if (num_args < 2)
+ goto process_config_line_err;
+
+ /* "INCLUDE" & "OPTIONAL_INCLUDE" */
+ if (i == 1 || i == 2) {
+ st_expr_expand(name, STRING_LENGTH, name, get_variable, NULL);
+ info_logger(LOG_INFO, "%sinclude: %s", (toupper(when[0]) == 'I') ? "": "optional_", name);
+ read_config_file(name, (toupper(when[0]) == 'I') ? FALSE : TRUE, event_mask);
+ return;
+ }
+ /* "RESTORE" */
+ if (i == 3) {
+ dir_operation(RESTORE, name, strlen(name),NULL);
+ return;
+ }
+ if (num_args < 3)
+ goto process_config_line_err;
+
+ new = xzalloc(sizeof *new);
+
+ for (count = 0; event_types[count].config_name != NULL; ++count) {
+ if (strcasecmp(when, event_types[count].config_name) != 0)
+ continue;
+ new->action.when = event_types[count].type;
+ break;
+ }
+ if (event_types[count].config_name == NULL) {
+ msg = "WHEN in";
+ goto process_config_line_err;
+ }
+
+ i = index_in_strings(options, what);
+
+ switch (i) {
+ case 4: /* "PERMISSIONS" */
+ new->action.what = AC_PERMISSIONS;
+ /* Get user and group */
+ ptr = strchr(p[0], '.');
+ if (ptr == NULL) {
+ msg = "UID.GID";
+ goto process_config_line_err; /*"missing '.' in UID.GID"*/
+ }
+
+ *ptr++ = '\0';
+ new->u.permissions.uid = get_uid_gid(UID, p[0]);
+ new->u.permissions.gid = get_uid_gid(GID, ptr);
+ /* Get mode */
+ new->u.permissions.mode = get_mode(p[1]);
+ break;
+ case 5: /* MODLOAD */
+ /*This action will pass "/dev/$devname"(i.e. "/dev/" prefixed to
+ the device name) to the module loading facility. In addition,
+ the /etc/modules.devfs configuration file is used.*/
+ if (ENABLE_DEVFSD_MODLOAD)
+ new->action.what = AC_MODLOAD;
+ break;
+ case 6: /* EXECUTE */
+ new->action.what = AC_EXECUTE;
+ num_args -= 3;
+
+ for (count = 0; count < num_args; ++count)
+ new->u.execute.argv[count] = xstrdup(p[count]);
+
+ new->u.execute.argv[num_args] = NULL;
+ break;
+ case 7: /* COPY */
+ new->action.what = AC_COPY;
+ num_args -= 3;
+ if (num_args != 2)
+ goto process_config_line_err; /* missing path and function in line */
+
+ new->u.copy.source = xstrdup(p[0]);
+ new->u.copy.destination = xstrdup(p[1]);
+ break;
+ case 8: /* IGNORE */
+ /* FALLTROUGH */
+ case 9: /* MKOLDCOMPAT */
+ /* FALLTROUGH */
+ case 10: /* MKNEWCOMPAT */
+ /* FALLTROUGH */
+ case 11:/* RMOLDCOMPAT */
+ /* FALLTROUGH */
+ case 12: /* RMNEWCOMPAT */
+ /* AC_IGNORE 6
+ AC_MKOLDCOMPAT 7
+ AC_MKNEWCOMPAT 8
+ AC_RMOLDCOMPAT 9
+ AC_RMNEWCOMPAT 10*/
+ new->action.what = i - 2;
+ break;
+ default:
+ msg = "WHAT in";
+ goto process_config_line_err;
+ /*esac*/
+ } /* switch (i) */
+
+ xregcomp(&new->preg, name, REG_EXTENDED);
+
+ *event_mask |= 1 << new->action.when;
+ new->next = NULL;
+ if (first_config == NULL)
+ first_config = new;
+ else
+ last_config->next = new;
+ last_config = new;
+ return;
+
+ process_config_line_err:
+ msg_logger_and_die(LOG_ERR, bb_msg_bad_config, msg , line);
+} /* End Function process_config_line */
+
+static int do_servicing(int fd, unsigned long event_mask)
+/* [SUMMARY] Service devfs changes until a signal is received.
+ <fd> The open control file.
+ <event_mask> The event mask.
+ [RETURNS] TRUE if SIGHUP was caught, else FALSE.
+*/
+{
+ ssize_t bytes;
+ struct devfsd_notify_struct info;
+
+ /* (void*) cast is only in order to match prototype */
+ xioctl(fd, DEVFSDIOC_SET_EVENT_MASK, (void*)event_mask);
+ while (!caught_signal) {
+ errno = 0;
+ bytes = read(fd, (char *) &info, sizeof info);
+ if (caught_signal)
+ break; /* Must test for this first */
+ if (errno == EINTR)
+ continue; /* Yes, the order is important */
+ if (bytes < 1)
+ break;
+ service_name(&info);
+ }
+ if (caught_signal) {
+ int c_sighup = caught_sighup;
+
+ caught_signal = FALSE;
+ caught_sighup = FALSE;
+ return c_sighup;
+ }
+ msg_logger_and_die(LOG_ERR, "read error on control file");
+} /* End Function do_servicing */
+
+static void service_name(const struct devfsd_notify_struct *info)
+/* [SUMMARY] Service a single devfs change.
+ <info> The devfs change.
+ [RETURNS] Nothing.
+*/
+{
+ unsigned int n;
+ regmatch_t mbuf[MAX_SUBEXPR];
+ struct config_entry_struct *entry;
+
+ if (ENABLE_DEBUG && info->overrun_count > 0)
+ msg_logger(LOG_ERR, "lost %u events", info->overrun_count);
+
+ /* Discard lookups on "/dev/log" and "/dev/initctl" */
+ if (info->type == DEVFSD_NOTIFY_LOOKUP
+ && ((info->devname[0] == 'l' && info->devname[1] == 'o'
+ && info->devname[2] == 'g' && !info->devname[3])
+ || (info->devname[0] == 'i' && info->devname[1] == 'n'
+ && info->devname[2] == 'i' && info->devname[3] == 't'
+ && info->devname[4] == 'c' && info->devname[5] == 't'
+ && info->devname[6] == 'l' && !info->devname[7]))
+ )
+ return;
+
+ for (entry = first_config; entry != NULL; entry = entry->next) {
+ /* First check if action matches the type, then check if name matches */
+ if (info->type != entry->action.when
+ || regexec(&entry->preg, info->devname, MAX_SUBEXPR, mbuf, 0) != 0)
+ continue;
+ for (n = 0;(n < MAX_SUBEXPR) && (mbuf[n].rm_so != -1); ++n)
+ /* VOID */;
+
+ switch (entry->action.what) {
+ case AC_PERMISSIONS:
+ action_permissions(info, entry);
+ break;
+ case AC_MODLOAD:
+ if (ENABLE_DEVFSD_MODLOAD)
+ action_modload(info, entry);
+ break;
+ case AC_EXECUTE:
+ action_execute(info, entry, mbuf, n);
+ break;
+ case AC_COPY:
+ action_copy(info, entry, mbuf, n);
+ break;
+ case AC_IGNORE:
+ return;
+ /*break;*/
+ case AC_MKOLDCOMPAT:
+ case AC_MKNEWCOMPAT:
+ case AC_RMOLDCOMPAT:
+ case AC_RMNEWCOMPAT:
+ action_compat(info, entry->action.what);
+ break;
+ default:
+ msg_logger_and_die(LOG_ERR, "Unknown action");
+ }
+ }
+} /* End Function service_name */
+
+static void action_permissions(const struct devfsd_notify_struct *info,
+ const struct config_entry_struct *entry)
+/* [SUMMARY] Update permissions for a device entry.
+ <info> The devfs change.
+ <entry> The config file entry.
+ [RETURNS] Nothing.
+*/
+{
+ struct stat statbuf;
+
+ if (stat(info->devname, &statbuf) != 0
+ || chmod(info->devname, (statbuf.st_mode & S_IFMT) | (entry->u.permissions.mode & ~S_IFMT)) != 0
+ || chown(info->devname, entry->u.permissions.uid, entry->u.permissions.gid) != 0
+ )
+ error_logger(LOG_ERR, "Can't chmod or chown: %s", info->devname);
+} /* End Function action_permissions */
+
+static void action_modload(const struct devfsd_notify_struct *info,
+ const struct config_entry_struct *entry UNUSED_PARAM)
+/* [SUMMARY] Load a module.
+ <info> The devfs change.
+ <entry> The config file entry.
+ [RETURNS] Nothing.
+*/
+{
+ char *argv[6];
+
+ argv[0] = (char*)MODPROBE;
+ argv[1] = (char*)MODPROBE_SWITCH_1; /* "-k" */
+ argv[2] = (char*)MODPROBE_SWITCH_2; /* "-C" */
+ argv[3] = (char*)CONFIG_MODULES_DEVFS;
+ argv[4] = concat_path_file("/dev", info->devname); /* device */
+ argv[5] = NULL;
+
+ spawn_and_wait(argv);
+ free(argv[4]);
+} /* End Function action_modload */
+
+static void action_execute(const struct devfsd_notify_struct *info,
+ const struct config_entry_struct *entry,
+ const regmatch_t *regexpr, unsigned int numexpr)
+/* [SUMMARY] Execute a programme.
+ <info> The devfs change.
+ <entry> The config file entry.
+ <regexpr> The number of subexpression(start, end) offsets within the
+ device name.
+ <numexpr> The number of elements within <<regexpr>>.
+ [RETURNS] Nothing.
+*/
+{
+ unsigned int count;
+ struct get_variable_info gv_info;
+ char *argv[MAX_ARGS + 1];
+ char largv[MAX_ARGS + 1][STRING_LENGTH];
+
+ gv_info.info = info;
+ gv_info.devname = info->devname;
+ snprintf(gv_info.devpath, sizeof(gv_info.devpath), "%s/%s", mount_point, info->devname);
+ for (count = 0; entry->u.execute.argv[count] != NULL; ++count) {
+ expand_expression(largv[count], STRING_LENGTH,
+ entry->u.execute.argv[count],
+ get_variable, &gv_info,
+ gv_info.devname, regexpr, numexpr);
+ argv[count] = largv[count];
+ }
+ argv[count] = NULL;
+ spawn_and_wait(argv);
+} /* End Function action_execute */
+
+
+static void action_copy(const struct devfsd_notify_struct *info,
+ const struct config_entry_struct *entry,
+ const regmatch_t *regexpr, unsigned int numexpr)
+/* [SUMMARY] Copy permissions.
+ <info> The devfs change.
+ <entry> The config file entry.
+ <regexpr> This list of subexpression(start, end) offsets within the
+ device name.
+ <numexpr> The number of elements in <<regexpr>>.
+ [RETURNS] Nothing.
+*/
+{
+ mode_t new_mode;
+ struct get_variable_info gv_info;
+ struct stat source_stat, dest_stat;
+ char source[STRING_LENGTH], destination[STRING_LENGTH];
+ int ret = 0;
+
+ dest_stat.st_mode = 0;
+
+ if ((info->type == DEVFSD_NOTIFY_CHANGE) && S_ISLNK(info->mode))
+ return;
+ gv_info.info = info;
+ gv_info.devname = info->devname;
+
+ snprintf(gv_info.devpath, sizeof(gv_info.devpath), "%s/%s", mount_point, info->devname);
+ expand_expression(source, STRING_LENGTH, entry->u.copy.source,
+ get_variable, &gv_info, gv_info.devname,
+ regexpr, numexpr);
+
+ expand_expression(destination, STRING_LENGTH, entry->u.copy.destination,
+ get_variable, &gv_info, gv_info.devname,
+ regexpr, numexpr);
+
+ if (!make_dir_tree(destination) || lstat(source, &source_stat) != 0)
+ return;
+ lstat(destination, &dest_stat);
+ new_mode = source_stat.st_mode & ~S_ISVTX;
+ if (info->type == DEVFSD_NOTIFY_CREATE)
+ new_mode |= S_ISVTX;
+ else if ((info->type == DEVFSD_NOTIFY_CHANGE) &&(dest_stat.st_mode & S_ISVTX))
+ new_mode |= S_ISVTX;
+ ret = copy_inode(destination, &dest_stat, new_mode, source, &source_stat);
+ if (ENABLE_DEBUG && ret && (errno != EEXIST))
+ error_logger(LOG_ERR, "copy_inode: %s to %s", source, destination);
+} /* End Function action_copy */
+
+static void action_compat(const struct devfsd_notify_struct *info, unsigned int action)
+/* [SUMMARY] Process a compatibility request.
+ <info> The devfs change.
+ <action> The action to take.
+ [RETURNS] Nothing.
+*/
+{
+ int ret;
+ const char *compat_name = NULL;
+ const char *dest_name = info->devname;
+ const char *ptr;
+ char compat_buf[STRING_LENGTH], dest_buf[STRING_LENGTH];
+ int mode, host, bus, target, lun;
+ unsigned int i;
+ char rewind_;
+ /* 1 to 5 "scsi/" , 6 to 9 "ide/host" */
+ static const char *const fmt[] = {
+ NULL ,
+ "sg/c%db%dt%du%d", /* scsi/generic */
+ "sd/c%db%dt%du%d", /* scsi/disc */
+ "sr/c%db%dt%du%d", /* scsi/cd */
+ "sd/c%db%dt%du%dp%d", /* scsi/part */
+ "st/c%db%dt%du%dm%d%c", /* scsi/mt */
+ "ide/hd/c%db%dt%du%d", /* ide/host/disc */
+ "ide/cd/c%db%dt%du%d", /* ide/host/cd */
+ "ide/hd/c%db%dt%du%dp%d", /* ide/host/part */
+ "ide/mt/c%db%dt%du%d%s", /* ide/host/mt */
+ NULL
+ };
+
+ /* First construct compatibility name */
+ switch (action) {
+ case AC_MKOLDCOMPAT:
+ case AC_RMOLDCOMPAT:
+ compat_name = get_old_name(info->devname, info->namelen, compat_buf, info->major, info->minor);
+ break;
+ case AC_MKNEWCOMPAT:
+ case AC_RMNEWCOMPAT:
+ ptr = bb_basename(info->devname);
+ i = scan_dev_name(info->devname, info->namelen, ptr);
+
+ /* nothing found */
+ if (i == 0 || i > 9)
+ return;
+
+ sscanf(info->devname + ((i < 6) ? 5 : 4), "host%d/bus%d/target%d/lun%d/", &host, &bus, &target, &lun);
+ snprintf(dest_buf, sizeof(dest_buf), "../%s", info->devname + (( i > 5) ? 4 : 0));
+ dest_name = dest_buf;
+ compat_name = compat_buf;
+
+
+ /* 1 == scsi/generic 2 == scsi/disc 3 == scsi/cd 6 == ide/host/disc 7 == ide/host/cd */
+ if (i == 1 || i == 2 || i == 3 || i == 6 || i ==7)
+ sprintf(compat_buf, fmt[i], host, bus, target, lun);
+
+ /* 4 == scsi/part 8 == ide/host/part */
+ if (i == 4 || i == 8)
+ sprintf(compat_buf, fmt[i], host, bus, target, lun, atoi(ptr + 4));
+
+ /* 5 == scsi/mt */
+ if (i == 5) {
+ rewind_ = info->devname[info->namelen - 1];
+ if (rewind_ != 'n')
+ rewind_ = '\0';
+ mode=0;
+ if (ptr[2] == 'l' /*108*/ || ptr[2] == 'm'/*109*/)
+ mode = ptr[2] - 107; /* 1 or 2 */
+ if (ptr[2] == 'a')
+ mode = 3;
+ sprintf(compat_buf, fmt[i], host, bus, target, lun, mode, rewind_);
+ }
+
+ /* 9 == ide/host/mt */
+ if (i == 9)
+ snprintf(compat_buf, sizeof(compat_buf), fmt[i], host, bus, target, lun, ptr + 2);
+ /* esac */
+ } /* switch (action) */
+
+ if (compat_name == NULL)
+ return;
+
+ /* Now decide what to do with it */
+ switch (action) {
+ case AC_MKOLDCOMPAT:
+ case AC_MKNEWCOMPAT:
+ mksymlink(dest_name, compat_name);
+ break;
+ case AC_RMOLDCOMPAT:
+ case AC_RMNEWCOMPAT:
+ ret = unlink(compat_name);
+ if (ENABLE_DEBUG && ret)
+ error_logger(LOG_ERR, "unlink: %s", compat_name);
+ break;
+ /*esac*/
+ } /* switch (action) */
+} /* End Function action_compat */
+
+static void restore(char *spath, struct stat source_stat, int rootlen)
+{
+ char *dpath;
+ struct stat dest_stat;
+
+ dest_stat.st_mode = 0;
+ dpath = concat_path_file(mount_point, spath + rootlen);
+ lstat(dpath, &dest_stat);
+ free(dpath);
+ if (S_ISLNK(source_stat.st_mode) || (source_stat.st_mode & S_ISVTX))
+ copy_inode(dpath, &dest_stat, (source_stat.st_mode & ~S_ISVTX), spath, &source_stat);
+
+ if (S_ISDIR(source_stat.st_mode))
+ dir_operation(RESTORE, spath, rootlen, NULL);
+}
+
+
+static int copy_inode(const char *destpath, const struct stat *dest_stat,
+ mode_t new_mode,
+ const char *sourcepath, const struct stat *source_stat)
+/* [SUMMARY] Copy an inode.
+ <destpath> The destination path. An existing inode may be deleted.
+ <dest_stat> The destination stat(2) information.
+ <new_mode> The desired new mode for the destination.
+ <sourcepath> The source path.
+ <source_stat> The source stat(2) information.
+ [RETURNS] TRUE on success, else FALSE.
+*/
+{
+ int source_len, dest_len;
+ char source_link[STRING_LENGTH], dest_link[STRING_LENGTH];
+ int fd, val;
+ struct sockaddr_un un_addr;
+ char symlink_val[STRING_LENGTH];
+
+ if ((source_stat->st_mode & S_IFMT) ==(dest_stat->st_mode & S_IFMT)) {
+ /* Same type */
+ if (S_ISLNK(source_stat->st_mode)) {
+ source_len = readlink(sourcepath, source_link, STRING_LENGTH - 1);
+ if ((source_len < 0)
+ || (dest_len = readlink(destpath, dest_link, STRING_LENGTH - 1)) < 0
+ )
+ return FALSE;
+ source_link[source_len] = '\0';
+ dest_link[dest_len] = '\0';
+ if ((source_len != dest_len) || (strcmp(source_link, dest_link) != 0)) {
+ unlink(destpath);
+ symlink(source_link, destpath);
+ }
+ return TRUE;
+ } /* Else not a symlink */
+ chmod(destpath, new_mode & ~S_IFMT);
+ chown(destpath, source_stat->st_uid, source_stat->st_gid);
+ return TRUE;
+ }
+ /* Different types: unlink and create */
+ unlink(destpath);
+ switch (source_stat->st_mode & S_IFMT) {
+ case S_IFSOCK:
+ fd = socket(AF_UNIX, SOCK_STREAM, 0);
+ if (fd < 0)
+ break;
+ un_addr.sun_family = AF_UNIX;
+ snprintf(un_addr.sun_path, sizeof(un_addr.sun_path), "%s", destpath);
+ val = bind(fd, (struct sockaddr *) &un_addr, (int) sizeof un_addr);
+ close(fd);
+ if (val != 0 || chmod(destpath, new_mode & ~S_IFMT) != 0)
+ break;
+ goto do_chown;
+ case S_IFLNK:
+ val = readlink(sourcepath, symlink_val, STRING_LENGTH - 1);
+ if (val < 0)
+ break;
+ symlink_val[val] = '\0';
+ if (symlink(symlink_val, destpath) == 0)
+ return TRUE;
+ break;
+ case S_IFREG:
+ fd = open(destpath, O_RDONLY | O_CREAT, new_mode & ~S_IFMT);
+ if (fd < 0)
+ break;
+ close(fd);
+ if (chmod(destpath, new_mode & ~S_IFMT) != 0)
+ break;
+ goto do_chown;
+ case S_IFBLK:
+ case S_IFCHR:
+ case S_IFIFO:
+ if (mknod(destpath, new_mode, source_stat->st_rdev) != 0)
+ break;
+ goto do_chown;
+ case S_IFDIR:
+ if (mkdir(destpath, new_mode & ~S_IFMT) != 0)
+ break;
+do_chown:
+ if (chown(destpath, source_stat->st_uid, source_stat->st_gid) == 0)
+ return TRUE;
+ /*break;*/
+ }
+ return FALSE;
+} /* End Function copy_inode */
+
+static void free_config(void)
+/* [SUMMARY] Free the configuration information.
+ [RETURNS] Nothing.
+*/
+{
+ struct config_entry_struct *c_entry;
+ void *next;
+
+ for (c_entry = first_config; c_entry != NULL; c_entry = next) {
+ unsigned int count;
+
+ next = c_entry->next;
+ regfree(&c_entry->preg);
+ if (c_entry->action.what == AC_EXECUTE) {
+ for (count = 0; count < MAX_ARGS; ++count) {
+ if (c_entry->u.execute.argv[count] == NULL)
+ break;
+ free(c_entry->u.execute.argv[count]);
+ }
+ }
+ free(c_entry);
+ }
+ first_config = NULL;
+ last_config = NULL;
+} /* End Function free_config */
+
+static int get_uid_gid(int flag, const char *string)
+/* [SUMMARY] Convert a string to a UID or GID value.
+ <flag> "UID" or "GID".
+ <string> The string.
+ [RETURNS] The UID or GID value.
+*/
+{
+ struct passwd *pw_ent;
+ struct group *grp_ent;
+ static const char *msg;
+
+ if (ENABLE_DEVFSD_VERBOSE)
+ msg = "user";
+
+ if (isdigit(string[0]) ||((string[0] == '-') && isdigit(string[1])))
+ return atoi(string);
+
+ if (flag == UID && (pw_ent = getpwnam(string)) != NULL)
+ return pw_ent->pw_uid;
+
+ if (flag == GID && (grp_ent = getgrnam(string)) != NULL)
+ return grp_ent->gr_gid;
+ else if (ENABLE_DEVFSD_VERBOSE)
+ msg = "group";
+
+ if (ENABLE_DEVFSD_VERBOSE)
+ msg_logger(LOG_ERR, "unknown %s: %s, defaulting to %cid=0", msg, string, msg[0]);
+ return 0;
+}/* End Function get_uid_gid */
+
+static mode_t get_mode(const char *string)
+/* [SUMMARY] Convert a string to a mode value.
+ <string> The string.
+ [RETURNS] The mode value.
+*/
+{
+ mode_t mode;
+ int i;
+
+ if (isdigit(string[0]))
+ return strtoul(string, NULL, 8);
+ if (strlen(string) != 9)
+ msg_logger_and_die(LOG_ERR, "bad mode: %s", string);
+
+ mode = 0;
+ i = S_IRUSR;
+ while (i > 0) {
+ if (string[0] == 'r' || string[0] == 'w' || string[0] == 'x')
+ mode += i;
+ i = i / 2;
+ string++;
+ }
+ return mode;
+} /* End Function get_mode */
+
+static void signal_handler(int sig)
+{
+ caught_signal = TRUE;
+ if (sig == SIGHUP)
+ caught_sighup = TRUE;
+
+ info_logger(LOG_INFO, "Caught signal %d", sig);
+} /* End Function signal_handler */
+
+static const char *get_variable(const char *variable, void *info)
+{
+ static char sbuf[sizeof(int)*3 + 2]; /* sign and NUL */
+ static char *hostname;
+
+ struct get_variable_info *gv_info = info;
+ const char *field_names[] = {
+ "hostname", "mntpt", "devpath", "devname",
+ "uid", "gid", "mode", hostname, mount_point,
+ gv_info->devpath, gv_info->devname, NULL
+ };
+ int i;
+
+ if (!hostname)
+ hostname = safe_gethostname();
+ /* index_in_str_array returns i>=0 */
+ i = index_in_str_array(field_names, variable);
+
+ if (i > 6 || i < 0 || (i > 1 && gv_info == NULL))
+ return NULL;
+ if (i >= 0 && i <= 3)
+ return field_names[i + 7];
+
+ if (i == 4)
+ sprintf(sbuf, "%u", gv_info->info->uid);
+ else if (i == 5)
+ sprintf(sbuf, "%u", gv_info->info->gid);
+ else if (i == 6)
+ sprintf(sbuf, "%o", gv_info->info->mode);
+ return sbuf;
+} /* End Function get_variable */
+
+static void service(struct stat statbuf, char *path)
+{
+ struct devfsd_notify_struct info;
+
+ memset(&info, 0, sizeof info);
+ info.type = DEVFSD_NOTIFY_REGISTERED;
+ info.mode = statbuf.st_mode;
+ info.major = major(statbuf.st_rdev);
+ info.minor = minor(statbuf.st_rdev);
+ info.uid = statbuf.st_uid;
+ info.gid = statbuf.st_gid;
+ snprintf(info.devname, sizeof(info.devname), "%s", path + strlen(mount_point) + 1);
+ info.namelen = strlen(info.devname);
+ service_name(&info);
+ if (S_ISDIR(statbuf.st_mode))
+ dir_operation(SERVICE, path, 0, NULL);
+}
+
+static void dir_operation(int type, const char * dir_name, int var, unsigned long *event_mask)
+/* [SUMMARY] Scan a directory tree and generate register events on leaf nodes.
+ <flag> To choose which function to perform
+ <dp> The directory pointer. This is closed upon completion.
+ <dir_name> The name of the directory.
+ <rootlen> string length parameter.
+ [RETURNS] Nothing.
+*/
+{
+ struct stat statbuf;
+ DIR *dp;
+ struct dirent *de;
+ char *path;
+
+ dp = warn_opendir(dir_name);
+ if (dp == NULL)
+ return;
+
+ while ((de = readdir(dp)) != NULL) {
+
+ if (de->d_name && DOT_OR_DOTDOT(de->d_name))
+ continue;
+ path = concat_path_file(dir_name, de->d_name);
+ if (lstat(path, &statbuf) == 0) {
+ switch (type) {
+ case SERVICE:
+ service(statbuf, path);
+ break;
+ case RESTORE:
+ restore(path, statbuf, var);
+ break;
+ case READ_CONFIG:
+ read_config_file(path, var, event_mask);
+ break;
+ }
+ }
+ free(path);
+ }
+ closedir(dp);
+} /* End Function do_scan_and_service */
+
+static int mksymlink(const char *oldpath, const char *newpath)
+/* [SUMMARY] Create a symlink, creating intervening directories as required.
+ <oldpath> The string contained in the symlink.
+ <newpath> The name of the new symlink.
+ [RETURNS] 0 on success, else -1.
+*/
+{
+ if (!make_dir_tree(newpath))
+ return -1;
+
+ if (symlink(oldpath, newpath) != 0) {
+ if (errno != EEXIST)
+ return -1;
+ }
+ return 0;
+} /* End Function mksymlink */
+
+
+static int make_dir_tree(const char *path)
+/* [SUMMARY] Creating intervening directories for a path as required.
+ <path> The full pathname(including the leaf node).
+ [RETURNS] TRUE on success, else FALSE.
+*/
+{
+ if (bb_make_directory(dirname((char *)path), -1, FILEUTILS_RECUR) == -1)
+ return FALSE;
+ return TRUE;
+} /* End Function make_dir_tree */
+
+static int expand_expression(char *output, unsigned int outsize,
+ const char *input,
+ const char *(*get_variable_func)(const char *variable, void *info),
+ void *info,
+ const char *devname,
+ const regmatch_t *ex, unsigned int numexp)
+/* [SUMMARY] Expand environment variables and regular subexpressions in string.
+ <output> The output expanded expression is written here.
+ <length> The size of the output buffer.
+ <input> The input expression. This may equal <<output>>.
+ <get_variable> A function which will be used to get variable values. If
+ this returns NULL, the environment is searched instead. If this is NULL,
+ only the environment is searched.
+ <info> An arbitrary pointer passed to <<get_variable>>.
+ <devname> Device name; specifically, this is the string that contains all
+ of the regular subexpressions.
+ <ex> Array of start / end offsets into info->devname for each subexpression
+ <numexp> Number of regular subexpressions found in <<devname>>.
+ [RETURNS] TRUE on success, else FALSE.
+*/
+{
+ char temp[STRING_LENGTH];
+
+ if (!st_expr_expand(temp, STRING_LENGTH, input, get_variable_func, info))
+ return FALSE;
+ expand_regexp(output, outsize, temp, devname, ex, numexp);
+ return TRUE;
+} /* End Function expand_expression */
+
+static void expand_regexp(char *output, size_t outsize, const char *input,
+ const char *devname,
+ const regmatch_t *ex, unsigned int numex)
+/* [SUMMARY] Expand all occurrences of the regular subexpressions \0 to \9.
+ <output> The output expanded expression is written here.
+ <outsize> The size of the output buffer.
+ <input> The input expression. This may NOT equal <<output>>, because
+ supporting that would require yet another string-copy. However, it's not
+ hard to write a simple wrapper function to add this functionality for those
+ few cases that need it.
+ <devname> Device name; specifically, this is the string that contains all
+ of the regular subexpressions.
+ <ex> An array of start and end offsets into <<devname>>, one for each
+ subexpression
+ <numex> Number of subexpressions in the offset-array <<ex>>.
+ [RETURNS] Nothing.
+*/
+{
+ const char last_exp = '0' - 1 + numex;
+ int c = -1;
+
+ /* Guarantee NULL termination by writing an explicit '\0' character into
+ the very last byte */
+ if (outsize)
+ output[--outsize] = '\0';
+ /* Copy the input string into the output buffer, replacing '\\' with '\'
+ and '\0' .. '\9' with subexpressions 0 .. 9, if they exist. Other \x
+ codes are deleted */
+ while ((c != '\0') && (outsize != 0)) {
+ c = *input;
+ ++input;
+ if (c == '\\') {
+ c = *input;
+ ++input;
+ if (c != '\\') {
+ if ((c >= '0') && (c <= last_exp)) {
+ const regmatch_t *subexp = ex + (c - '0');
+ unsigned int sublen = subexp->rm_eo - subexp->rm_so;
+
+ /* Range checking */
+ if (sublen > outsize)
+ sublen = outsize;
+ strncpy(output, devname + subexp->rm_so, sublen);
+ output += sublen;
+ outsize -= sublen;
+ }
+ continue;
+ }
+ }
+ *output = c;
+ ++output;
+ --outsize;
+ } /* while */
+} /* End Function expand_regexp */
+
+
+/* from compat_name.c */
+
+struct translate_struct {
+ const char *match; /* The string to match to(up to length) */
+ const char *format; /* Format of output, "%s" takes data past match string,
+ NULL is effectively "%s"(just more efficient) */
+};
+
+static struct translate_struct translate_table[] =
+{
+ {"sound/", NULL},
+ {"printers/", "lp%s"},
+ {"v4l/", NULL},
+ {"parports/", "parport%s"},
+ {"fb/", "fb%s"},
+ {"netlink/", NULL},
+ {"loop/", "loop%s"},
+ {"floppy/", "fd%s"},
+ {"rd/", "ram%s"},
+ {"md/", "md%s"}, /* Meta-devices */
+ {"vc/", "tty%s"},
+ {"misc/", NULL},
+ {"isdn/", NULL},
+ {"pg/", "pg%s"}, /* Parallel port generic ATAPI interface*/
+ {"i2c/", "i2c-%s"},
+ {"staliomem/", "staliomem%s"}, /* Stallion serial driver control */
+ {"tts/E", "ttyE%s"}, /* Stallion serial driver */
+ {"cua/E", "cue%s"}, /* Stallion serial driver callout */
+ {"tts/R", "ttyR%s"}, /* Rocketport serial driver */
+ {"cua/R", "cur%s"}, /* Rocketport serial driver callout */
+ {"ip2/", "ip2%s"}, /* Computone serial driver control */
+ {"tts/F", "ttyF%s"}, /* Computone serial driver */
+ {"cua/F", "cuf%s"}, /* Computone serial driver callout */
+ {"tts/C", "ttyC%s"}, /* Cyclades serial driver */
+ {"cua/C", "cub%s"}, /* Cyclades serial driver callout */
+ {"tts/", "ttyS%s"}, /* Generic serial: must be after others */
+ {"cua/", "cua%s"}, /* Generic serial: must be after others */
+ {"input/js", "js%s"}, /* Joystick driver */
+ {NULL, NULL}
+};
+
+const char *get_old_name(const char *devname, unsigned int namelen,
+ char *buffer, unsigned int major, unsigned int minor)
+/* [SUMMARY] Translate a kernel-supplied name into an old name.
+ <devname> The device name provided by the kernel.
+ <namelen> The length of the name.
+ <buffer> A buffer that may be used. This should be at least 128 bytes long.
+ <major> The major number for the device.
+ <minor> The minor number for the device.
+ [RETURNS] A pointer to the old name if known, else NULL.
+*/
+{
+ const char *compat_name = NULL;
+ const char *ptr;
+ struct translate_struct *trans;
+ unsigned int i;
+ char mode;
+ int indexx;
+ const char *pty1;
+ const char *pty2;
+ size_t len;
+ /* 1 to 5 "scsi/" , 6 to 9 "ide/host", 10 sbp/, 11 vcc/, 12 pty/ */
+ static const char *const fmt[] = {
+ NULL ,
+ "sg%u", /* scsi/generic */
+ NULL, /* scsi/disc */
+ "sr%u", /* scsi/cd */
+ NULL, /* scsi/part */
+ "nst%u%c", /* scsi/mt */
+ "hd%c" , /* ide/host/disc */
+ "hd%c" , /* ide/host/cd */
+ "hd%c%s", /* ide/host/part */
+ "%sht%d", /* ide/host/mt */
+ "sbpcd%u", /* sbp/ */
+ "vcs%s", /* vcc/ */
+ "%cty%c%c", /* pty/ */
+ NULL
+ };
+
+ for (trans = translate_table; trans->match != NULL; ++trans) {
+ len = strlen(trans->match);
+
+ if (strncmp(devname, trans->match, len) == 0) {
+ if (trans->format == NULL)
+ return devname + len;
+ sprintf(buffer, trans->format, devname + len);
+ return buffer;
+ }
+ }
+
+ ptr = bb_basename(devname);
+ i = scan_dev_name(devname, namelen, ptr);
+
+ if (i > 0 && i < 13)
+ compat_name = buffer;
+ else
+ return NULL;
+
+ /* 1 == scsi/generic, 3 == scsi/cd, 10 == sbp/ */
+ if (i == 1 || i == 3 || i == 10)
+ sprintf(buffer, fmt[i], minor);
+
+ /* 2 ==scsi/disc, 4 == scsi/part */
+ if (i == 2 || i == 4)
+ compat_name = write_old_sd_name(buffer, major, minor, ((i == 2) ? "" : (ptr + 4)));
+
+ /* 5 == scsi/mt */
+ if (i == 5) {
+ mode = ptr[2];
+ if (mode == 'n')
+ mode = '\0';
+ sprintf(buffer, fmt[i], minor & 0x1f, mode);
+ if (devname[namelen - 1] != 'n')
+ ++compat_name;
+ }
+ /* 6 == ide/host/disc, 7 == ide/host/cd, 8 == ide/host/part */
+ if (i == 6 || i == 7 || i == 8)
+ /* last arg should be ignored for i == 6 or i== 7 */
+ sprintf(buffer, fmt[i] , get_old_ide_name(major, minor), ptr + 4);
+
+ /* 9 == ide/host/mt */
+ if (i == 9)
+ sprintf(buffer, fmt[i], ptr + 2, minor & 0x7f);
+
+ /* 11 == vcc/ */
+ if (i == 11) {
+ sprintf(buffer, fmt[i], devname + 4);
+ if (buffer[3] == '0')
+ buffer[3] = '\0';
+ }
+ /* 12 == pty/ */
+ if (i == 12) {
+ pty1 = "pqrstuvwxyzabcde";
+ pty2 = "0123456789abcdef";
+ indexx = atoi(devname + 5);
+ sprintf(buffer, fmt[i], (devname[4] == 'm') ? 'p' : 't', pty1[indexx >> 4], pty2[indexx & 0x0f]);
+ }
+ return compat_name;
+} /* End Function get_old_name */
+
+static char get_old_ide_name(unsigned int major, unsigned int minor)
+/* [SUMMARY] Get the old IDE name for a device.
+ <major> The major number for the device.
+ <minor> The minor number for the device.
+ [RETURNS] The drive letter.
+*/
+{
+ char letter = 'y'; /* 121 */
+ char c = 'a'; /* 97 */
+ int i = IDE0_MAJOR;
+
+ /* I hope it works like the previous code as it saves a few bytes. Tito ;P */
+ do {
+ if (i == IDE0_MAJOR || i == IDE1_MAJOR || i == IDE2_MAJOR
+ || i == IDE3_MAJOR || i == IDE4_MAJOR || i == IDE5_MAJOR
+ || i == IDE6_MAJOR || i == IDE7_MAJOR || i == IDE8_MAJOR
+ || i == IDE9_MAJOR
+ ) {
+ if ((unsigned int)i == major) {
+ letter = c;
+ break;
+ }
+ c += 2;
+ }
+ i++;
+ } while (i <= IDE9_MAJOR);
+
+ if (minor > 63)
+ ++letter;
+ return letter;
+} /* End Function get_old_ide_name */
+
+static char *write_old_sd_name(char *buffer,
+ unsigned int major, unsigned int minor,
+ const char *part)
+/* [SUMMARY] Write the old SCSI disc name to a buffer.
+ <buffer> The buffer to write to.
+ <major> The major number for the device.
+ <minor> The minor number for the device.
+ <part> The partition string. Must be "" for a whole-disc entry.
+ [RETURNS] A pointer to the buffer on success, else NULL.
+*/
+{
+ unsigned int disc_index;
+
+ if (major == 8) {
+ sprintf(buffer, "sd%c%s", 'a' + (minor >> 4), part);
+ return buffer;
+ }
+ if ((major > 64) && (major < 72)) {
+ disc_index = ((major - 64) << 4) +(minor >> 4);
+ if (disc_index < 26)
+ sprintf(buffer, "sd%c%s", 'a' + disc_index, part);
+ else
+ sprintf(buffer, "sd%c%c%s", 'a' +(disc_index / 26) - 1, 'a' + disc_index % 26, part);
+ return buffer;
+ }
+ return NULL;
+} /* End Function write_old_sd_name */
+
+
+/* expression.c */
+
+/*EXPERIMENTAL_FUNCTION*/
+
+int st_expr_expand(char *output, unsigned int length, const char *input,
+ const char *(*get_variable_func)(const char *variable,
+ void *info),
+ void *info)
+/* [SUMMARY] Expand an expression using Borne Shell-like unquoted rules.
+ <output> The output expanded expression is written here.
+ <length> The size of the output buffer.
+ <input> The input expression. This may equal <<output>>.
+ <get_variable> A function which will be used to get variable values. If
+ this returns NULL, the environment is searched instead. If this is NULL,
+ only the environment is searched.
+ <info> An arbitrary pointer passed to <<get_variable>>.
+ [RETURNS] TRUE on success, else FALSE.
+*/
+{
+ char ch;
+ unsigned int len;
+ unsigned int out_pos = 0;
+ const char *env;
+ const char *ptr;
+ struct passwd *pwent;
+ char buffer[BUFFER_SIZE], tmp[STRING_LENGTH];
+
+ if (length > BUFFER_SIZE)
+ length = BUFFER_SIZE;
+ for (; TRUE; ++input) {
+ switch (ch = *input) {
+ case '$':
+ /* Variable expansion */
+ input = expand_variable(buffer, length, &out_pos, ++input, get_variable_func, info);
+ if (input == NULL)
+ return FALSE;
+ break;
+ case '~':
+ /* Home directory expansion */
+ ch = input[1];
+ if (isspace(ch) ||(ch == '/') ||(ch == '\0')) {
+ /* User's own home directory: leave separator for next time */
+ env = getenv("HOME");
+ if (env == NULL) {
+ info_logger(LOG_INFO, bb_msg_variable_not_found, "HOME");
+ return FALSE;
+ }
+ len = strlen(env);
+ if (len + out_pos >= length)
+ goto st_expr_expand_out;
+ memcpy(buffer + out_pos, env, len + 1);
+ out_pos += len;
+ continue;
+ }
+ /* Someone else's home directory */
+ for (ptr = ++input; !isspace(ch) && (ch != '/') && (ch != '\0'); ch = *++ptr)
+ /* VOID */;
+ len = ptr - input;
+ if (len >= sizeof tmp)
+ goto st_expr_expand_out;
+ safe_memcpy(tmp, input, len);
+ input = ptr - 1;
+ pwent = getpwnam(tmp);
+ if (pwent == NULL) {
+ info_logger(LOG_INFO, "no pwent for: %s", tmp);
+ return FALSE;
+ }
+ len = strlen(pwent->pw_dir);
+ if (len + out_pos >= length)
+ goto st_expr_expand_out;
+ memcpy(buffer + out_pos, pwent->pw_dir, len + 1);
+ out_pos += len;
+ break;
+ case '\0':
+ /* Falltrough */
+ default:
+ if (out_pos >= length)
+ goto st_expr_expand_out;
+ buffer[out_pos++] = ch;
+ if (ch == '\0') {
+ memcpy(output, buffer, out_pos);
+ return TRUE;
+ }
+ break;
+ /* esac */
+ }
+ }
+ return FALSE;
+st_expr_expand_out:
+ info_logger(LOG_INFO, bb_msg_small_buffer);
+ return FALSE;
+} /* End Function st_expr_expand */
+
+
+/* Private functions follow */
+
+static const char *expand_variable(char *buffer, unsigned int length,
+ unsigned int *out_pos, const char *input,
+ const char *(*func)(const char *variable,
+ void *info),
+ void *info)
+/* [SUMMARY] Expand a variable.
+ <buffer> The buffer to write to.
+ <length> The length of the output buffer.
+ <out_pos> The current output position. This is updated.
+ <input> A pointer to the input character pointer.
+ <func> A function which will be used to get variable values. If this
+ returns NULL, the environment is searched instead. If this is NULL, only
+ the environment is searched.
+ <info> An arbitrary pointer passed to <<func>>.
+ <errfp> Diagnostic messages are written here.
+ [RETURNS] A pointer to the end of this subexpression on success, else NULL.
+*/
+{
+ char ch;
+ int len;
+ unsigned int open_braces;
+ const char *env, *ptr;
+ char tmp[STRING_LENGTH];
+
+ ch = input[0];
+ if (ch == '$') {
+ /* Special case for "$$": PID */
+ sprintf(tmp, "%d", (int) getpid());
+ len = strlen(tmp);
+ if (len + *out_pos >= length)
+ goto expand_variable_out;
+
+ memcpy(buffer + *out_pos, tmp, len + 1);
+ out_pos += len;
+ return input;
+ }
+ /* Ordinary variable expansion, possibly in braces */
+ if (ch != '{') {
+ /* Simple variable expansion */
+ for (ptr = input; isalnum(ch) || (ch == '_') || (ch == ':'); ch = *++ptr)
+ /* VOID */;
+ len = ptr - input;
+ if ((size_t)len >= sizeof tmp)
+ goto expand_variable_out;
+
+ safe_memcpy(tmp, input, len);
+ input = ptr - 1;
+ env = get_variable_v2(tmp, func, info);
+ if (env == NULL) {
+ info_logger(LOG_INFO, bb_msg_variable_not_found, tmp);
+ return NULL;
+ }
+ len = strlen(env);
+ if (len + *out_pos >= length)
+ goto expand_variable_out;
+
+ memcpy(buffer + *out_pos, env, len + 1);
+ *out_pos += len;
+ return input;
+ }
+ /* Variable in braces: check for ':' tricks */
+ ch = *++input;
+ for (ptr = input; isalnum(ch) || (ch == '_'); ch = *++ptr)
+ /* VOID */;
+ if (ch == '}') {
+ /* Must be simple variable expansion with "${var}" */
+ len = ptr - input;
+ if ((size_t)len >= sizeof tmp)
+ goto expand_variable_out;
+
+ safe_memcpy(tmp, input, len);
+ ptr = expand_variable(buffer, length, out_pos, tmp, func, info);
+ if (ptr == NULL)
+ return NULL;
+ return input + len;
+ }
+ if (ch != ':' || ptr[1] != '-') {
+ info_logger(LOG_INFO, "illegal char in var name");
+ return NULL;
+ }
+ /* It's that handy "${var:-word}" expression. Check if var is defined */
+ len = ptr - input;
+ if ((size_t)len >= sizeof tmp)
+ goto expand_variable_out;
+
+ safe_memcpy(tmp, input, len);
+ /* Move input pointer to ':' */
+ input = ptr;
+ /* First skip to closing brace, taking note of nested expressions */
+ ptr += 2;
+ ch = ptr[0];
+ for (open_braces = 1; open_braces > 0; ch = *++ptr) {
+ switch (ch) {
+ case '{':
+ ++open_braces;
+ break;
+ case '}':
+ --open_braces;
+ break;
+ case '\0':
+ info_logger(LOG_INFO, "\"}\" not found in: %s", input);
+ return NULL;
+ default:
+ break;
+ }
+ }
+ --ptr;
+ /* At this point ptr should point to closing brace of "${var:-word}" */
+ env = get_variable_v2(tmp, func, info);
+ if (env != NULL) {
+ /* Found environment variable, so skip the input to the closing brace
+ and return the variable */
+ input = ptr;
+ len = strlen(env);
+ if (len + *out_pos >= length)
+ goto expand_variable_out;
+
+ memcpy(buffer + *out_pos, env, len + 1);
+ *out_pos += len;
+ return input;
+ }
+ /* Environment variable was not found, so process word. Advance input
+ pointer to start of word in "${var:-word}" */
+ input += 2;
+ len = ptr - input;
+ if ((size_t)len >= sizeof tmp)
+ goto expand_variable_out;
+
+ safe_memcpy(tmp, input, len);
+ input = ptr;
+ if (!st_expr_expand(tmp, STRING_LENGTH, tmp, func, info))
+ return NULL;
+ len = strlen(tmp);
+ if (len + *out_pos >= length)
+ goto expand_variable_out;
+
+ memcpy(buffer + *out_pos, tmp, len + 1);
+ *out_pos += len;
+ return input;
+expand_variable_out:
+ info_logger(LOG_INFO, bb_msg_small_buffer);
+ return NULL;
+} /* End Function expand_variable */
+
+
+static const char *get_variable_v2(const char *variable,
+ const char *(*func)(const char *variable, void *info),
+ void *info)
+/* [SUMMARY] Get a variable from the environment or .
+ <variable> The variable name.
+ <func> A function which will be used to get the variable. If this returns
+ NULL, the environment is searched instead. If this is NULL, only the
+ environment is searched.
+ [RETURNS] The value of the variable on success, else NULL.
+*/
+{
+ const char *value;
+
+ if (func != NULL) {
+ value = (*func)(variable, info);
+ if (value != NULL)
+ return value;
+ }
+ return getenv(variable);
+} /* End Function get_variable */
+
+/* END OF CODE */