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reorganize applet table. Eliminates pointers to names.

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Should be a big win for libbusybox. busybox wins too:

   text    data     bss     dec     hex filename
 776524     929    9100  786553   c0079 busybox_old
 775903     929    9100  785932   bfe0c busybox_unstripped
This commit is contained in:
Denis Vlasenko
2007-11-28 06:49:03 +00:00
parent 79c6904faf
commit 1aa7e477b1
13 changed files with 137 additions and 128 deletions
Download Patch File Download Diff File Expand all files Collapse all files

13
include/applets.h
View File

@@ -59,12 +59,12 @@ s - suid type:
# define APPLET_NOFORK(name,main,l,s,name2) LINK l name
#else
const struct bb_applet applets[] = { /* name, main, location, need_suid */
# define APPLET(name,l,s) { #name, name##_main USE_FEATURE_INSTALLER(,l) USE_FEATURE_SUID(,s) },
# define APPLET_NOUSAGE(name,main,l,s) { #name, main##_main USE_FEATURE_INSTALLER(,l) USE_FEATURE_SUID(,s) },
# define APPLET_ODDNAME(name,main,l,s,name2) { #name, main##_main USE_FEATURE_INSTALLER(,l) USE_FEATURE_SUID(,s) },
# define APPLET_NOEXEC(name,main,l,s,name2) { #name, main##_main USE_FEATURE_INSTALLER(,l) USE_FEATURE_SUID(,s) USE_FEATURE_PREFER_APPLETS(,1) },
# define APPLET_NOFORK(name,main,l,s,name2) { #name, main##_main USE_FEATURE_INSTALLER(,l) USE_FEATURE_SUID(,s) USE_FEATURE_PREFER_APPLETS(,1 ,1) },
static struct bb_applet applets[] = { /* name, main, location, need_suid */
# define APPLET(name,l,s) { #name, #name, l, s },
# define APPLET_NOUSAGE(name,main,l,s) { #name, #main, l, s },
# define APPLET_ODDNAME(name,main,l,s,name2) { #name, #main, l, s },
# define APPLET_NOEXEC(name,main,l,s,name2) { #name, #main, l, s, 1 },
# define APPLET_NOFORK(name,main,l,s,name2) { #name, #main, l, s, 1, 1 },
#endif
#if ENABLE_INSTALL_NO_USR
@@ -385,7 +385,6 @@ USE_GUNZIP(APPLET_ODDNAME(zcat, gunzip, _BB_DIR_BIN, _BB_SUID_NEVER, zcat))
USE_ZCIP(APPLET(zcip, _BB_DIR_SBIN, _BB_SUID_NEVER))
#if !defined(PROTOTYPES) && !defined(NAME_MAIN_CNAME) && !defined(MAKE_USAGE)
{ NULL }
};
#endif

46
include/busybox.h
View File

@@ -9,8 +9,7 @@
#include "libbb.h"
#if ENABLE_FEATURE_INSTALLER
/* order matters: used as index into "install_dir[]" in busybox.c */
/* order matters: used as index into "install_dir[]" in appletlib.c */
typedef enum bb_install_loc_t {
_BB_DIR_ROOT = 0,
_BB_DIR_BIN,
@@ -18,41 +17,42 @@ typedef enum bb_install_loc_t {
_BB_DIR_USR_BIN,
_BB_DIR_USR_SBIN
} bb_install_loc_t;
#endif
#if ENABLE_FEATURE_SUID
typedef enum bb_suid_t {
_BB_SUID_NEVER = 0,
_BB_SUID_MAYBE,
_BB_SUID_ALWAYS
} bb_suid_t;
/* Defined in appletlib.c (by including generated applet_tables.h) */
/* Keep in sync with applets/applet_tables.c! */
extern const char applet_names[];
extern int (*const applet_mains[])(int argc, char **argv);
#if ENABLE_FEATURE_INSTALLER || ENABLE_FEATURE_PREFER_APPLETS
extern const uint32_t applet_nameofs[];
#else
extern const uint16_t applet_nameofs[];
#endif
struct bb_applet {
const char *name;
int (*main) (int argc, char **argv);
#if ENABLE_FEATURE_INSTALLER
__extension__ enum bb_install_loc_t install_loc:8;
#endif
#if ENABLE_FEATURE_SUID
__extension__ enum bb_suid_t need_suid:8;
#define APPLET_NAME(i) (applet_names + (applet_nameofs[i] & 0x3fff))
#define APPLET_SUID(i) ((applet_nameofs[i] >> 14) & 0x3)
#else
#define APPLET_NAME(i) (applet_names + (applet_nameofs[i] & 0xffff))
#endif
#if ENABLE_FEATURE_INSTALLER
#define APPLET_INSTALL_LOC(i) ((applet_nameofs[i] >> 16) & 0x7)
#endif
#if ENABLE_FEATURE_PREFER_APPLETS
/* true if instead of fork(); exec("applet"); waitpid();
* one can do fork(); exit(applet_main(argc,argv)); waitpid(); */
unsigned char noexec;
/* Even nicer */
/* true if instead of fork(); exec("applet"); waitpid();
* one can simply call applet_main(argc,argv); */
unsigned char nofork;
#define APPLET_IS_NOFORK(i) (applet_nameofs[i] & (1 << 19))
#define APPLET_IS_NOEXEC(i) (applet_nameofs[i] & (1 << 20))
#endif
};
/* Defined in appletlib.c */
extern const struct bb_applet applets[];
extern const unsigned short NUM_APPLETS;
/* Length of these names has effect on size of libbusybox
* and "individual" binaries. Keep them short.
*/

11
include/libbb.h
View File

@@ -550,7 +550,6 @@ void clear_username_cache(void);
enum { USERNAME_MAX_SIZE = 16 - sizeof(int) };
struct bb_applet;
int execable_file(const char *name);
char *find_execable(const char *filename);
int exists_execable(const char *filename);
@@ -562,7 +561,7 @@ int exists_execable(const char *filename);
int bb_execvp(const char *file, char *const argv[]);
#define BB_EXECVP(prog,cmd) bb_execvp(prog,cmd)
#define BB_EXECLP(prog,cmd,...) \
execlp((find_applet_by_name(prog)) ? CONFIG_BUSYBOX_EXEC_PATH : prog, \
execlp((find_applet_by_name(prog) >= 0) ? CONFIG_BUSYBOX_EXEC_PATH : prog, \
cmd, __VA_ARGS__)
#else
#define BB_EXECVP(prog,cmd) execvp(prog,cmd)
@@ -600,8 +599,8 @@ struct nofork_save_area {
void save_nofork_data(struct nofork_save_area *save);
void restore_nofork_data(struct nofork_save_area *save);
/* Does NOT check that applet is NOFORK, just blindly runs it */
int run_nofork_applet(const struct bb_applet *a, char **argv);
int run_nofork_applet_prime(struct nofork_save_area *old, const struct bb_applet *a, char **argv);
int run_nofork_applet(int applet_no, char **argv);
int run_nofork_applet_prime(struct nofork_save_area *old, int applet_no, char **argv);
/* Helpers for daemonization.
*
@@ -786,10 +785,10 @@ const struct hwtype *get_hwntype(int type);
#ifndef BUILD_INDIVIDUAL
extern const struct bb_applet *find_applet_by_name(const char *name);
extern int find_applet_by_name(const char *name);
/* Returns only if applet is not found. */
extern void run_applet_and_exit(const char *name, char **argv);
extern void run_appletstruct_and_exit(const struct bb_applet *a, char **argv) ATTRIBUTE_NORETURN;
extern void run_applet_no_and_exit(int a, char **argv) ATTRIBUTE_NORETURN;
#endif
extern int match_fstype(const struct mntent *mt, const char *fstypes);