X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=include%2Flibbb.h;h=f50ae3604df1385924c8239eb74197262fe3d2c7;hb=b22a8059cb8f804c77f302fa90b64c25d5513db1;hp=d76571b58acf8259ccefe6bed6d9eeebb3ef5d16;hpb=0c97c9d43707da745fe2bc62ab2a69497ceaf666;p=oweals%2Fbusybox.git diff --git a/include/libbb.h b/include/libbb.h index d76571b58..f50ae3604 100644 --- a/include/libbb.h +++ b/include/libbb.h @@ -17,7 +17,6 @@ #include #include #include -#include #include #include #include @@ -26,13 +25,11 @@ #include #include #include -/* #include - said to be obsolete */ #include #include #include #include #include -#include #include #include #include @@ -40,10 +37,26 @@ #include #include #include +/* Try to pull in PATH_MAX */ +#include +#include +#ifndef PATH_MAX +#define PATH_MAX 256 +#endif + +#ifdef HAVE_MNTENT_H +#include +#endif + +#ifdef HAVE_SYS_STATFS_H +#include +#endif #if ENABLE_SELINUX #include #include +#include +#include #endif #if ENABLE_LOCALE_SUPPORT @@ -52,22 +65,71 @@ #define setlocale(x,y) ((void)0) #endif -#include "pwd_.h" -#include "grp_.h" -/* ifdef it out, because it may include */ -/* and we may not even _have_ ! */ +#ifdef DMALLOC +#include +#endif + +#if !ENABLE_USE_BB_PWD_GRP +# include +# include +#endif #if ENABLE_FEATURE_SHADOWPASSWDS -#include "shadow_.h" +# if !ENABLE_USE_BB_SHADOW +# include +# endif #endif -/* Try to pull in PATH_MAX */ -#include -#include -#ifndef PATH_MAX -#define PATH_MAX 256 +/* Some libc's forget to declare these, help them */ +extern char **environ; + +#if defined(__GLIBC__) && __GLIBC__ < 2 +int vdprintf(int d, const char *format, va_list ap); +#endif +/* klogctl is in libc's klog.h, but we cheat and not #include that */ +int klogctl(int type, char *b, int len); +/* This is declared here rather than #including in order to avoid + * confusing the two versions of basename. See the dirname/basename man page + * for details. */ +char *dirname(char *path); +/* Include our own copy of struct sysinfo to avoid binary compatibility + * problems with Linux 2.4, which changed things. Grumble, grumble. */ +struct sysinfo { + long uptime; /* Seconds since boot */ + unsigned long loads[3]; /* 1, 5, and 15 minute load averages */ + unsigned long totalram; /* Total usable main memory size */ + unsigned long freeram; /* Available memory size */ + unsigned long sharedram; /* Amount of shared memory */ + unsigned long bufferram; /* Memory used by buffers */ + unsigned long totalswap; /* Total swap space size */ + unsigned long freeswap; /* swap space still available */ + unsigned short procs; /* Number of current processes */ + unsigned short pad; /* Padding needed for m68k */ + unsigned long totalhigh; /* Total high memory size */ + unsigned long freehigh; /* Available high memory size */ + unsigned int mem_unit; /* Memory unit size in bytes */ + char _f[20 - 2*sizeof(long) - sizeof(int)]; /* Padding: libc5 uses this.. */ +}; +int sysinfo(struct sysinfo* info); + + +/* Make all declarations hidden (-fvisibility flag only affects definitions) */ +/* (don't include system headers after this until corresponding pop!) */ +#if __GNUC_PREREQ(4,1) +# pragma GCC visibility push(hidden) +#endif + + +#if ENABLE_USE_BB_PWD_GRP +# include "pwd_.h" +# include "grp_.h" +#endif +#if ENABLE_FEATURE_SHADOWPASSWDS +# if ENABLE_USE_BB_SHADOW +# include "shadow_.h" +# endif #endif -/* Tested to work correctly (IIRC :]) */ +/* Tested to work correctly with all int types (IIRC :]) */ #define MAXINT(T) (T)( \ ((T)-1) > 0 \ ? (T)-1 \ @@ -81,7 +143,7 @@ ) /* Large file support */ -/* Note that CONFIG_LFS forces bbox to be built with all common ops +/* Note that CONFIG_LFS=y forces bbox to be built with all common ops * (stat, lseek etc) mapped to "largefile" variants by libc. * Practically it means that open() automatically has O_LARGEFILE added * and all filesize/file_offset parameters and struct members are "large" @@ -165,7 +227,6 @@ #endif #endif - #if defined(__GLIBC__) /* glibc uses __errno_location() to get a ptr to errno */ /* We can just memorize it once - no multithreading in busybox :) */ @@ -174,33 +235,6 @@ extern int *const bb_errno; #define errno (*bb_errno) #endif -#if defined(__GLIBC__) && __GLIBC__ < 2 -int vdprintf(int d, const char *format, va_list ap); -#endif -// This is declared here rather than #including in order to avoid -// confusing the two versions of basename. See the dirname/basename man page -// for details. -char *dirname(char *path); -/* Include our own copy of struct sysinfo to avoid binary compatibility - * problems with Linux 2.4, which changed things. Grumble, grumble. */ -struct sysinfo { - long uptime; /* Seconds since boot */ - unsigned long loads[3]; /* 1, 5, and 15 minute load averages */ - unsigned long totalram; /* Total usable main memory size */ - unsigned long freeram; /* Available memory size */ - unsigned long sharedram; /* Amount of shared memory */ - unsigned long bufferram; /* Memory used by buffers */ - unsigned long totalswap; /* Total swap space size */ - unsigned long freeswap; /* swap space still available */ - unsigned short procs; /* Number of current processes */ - unsigned short pad; /* Padding needed for m68k */ - unsigned long totalhigh; /* Total high memory size */ - unsigned long freehigh; /* Available high memory size */ - unsigned int mem_unit; /* Memory unit size in bytes */ - char _f[20-2*sizeof(long)-sizeof(int)]; /* Padding: libc5 uses this.. */ -}; -int sysinfo(struct sysinfo* info); - unsigned long long monotonic_us(void); unsigned monotonic_sec(void); @@ -212,8 +246,28 @@ extern char *skip_non_whitespace(const char *); //TODO: supply a pointer to char[11] buffer (avoid statics)? extern const char *bb_mode_string(mode_t mode); extern int is_directory(const char *name, int followLinks, struct stat *statBuf); +enum { /* DO NOT CHANGE THESE VALUES! cp.c, mv.c, install.c depend on them. */ + FILEUTILS_PRESERVE_STATUS = 1, + FILEUTILS_DEREFERENCE = 2, + FILEUTILS_RECUR = 4, + FILEUTILS_FORCE = 8, + FILEUTILS_INTERACTIVE = 0x10, + FILEUTILS_MAKE_HARDLINK = 0x20, + FILEUTILS_MAKE_SOFTLINK = 0x40, + FILEUTILS_DEREF_SOFTLINK = 0x80, +#if ENABLE_SELINUX + FILEUTILS_PRESERVE_SECURITY_CONTEXT = 0x100, + FILEUTILS_SET_SECURITY_CONTEXT = 0x200 +#endif +}; +#define FILEUTILS_CP_OPTSTR "pdRfilsL" USE_SELINUX("c") extern int remove_file(const char *path, int flags); +/* NB: without FILEUTILS_RECUR in flags, it will basically "cat" + * the source, not copy (unless "source" is a directory). + * This makes "cp /dev/null file" and "install /dev/null file" (!!!) + * work coreutils-compatibly. */ extern int copy_file(const char *source, const char *dest, int flags); + enum { ACTION_RECURSE = (1 << 0), ACTION_FOLLOWLINKS = (1 << 1), @@ -226,7 +280,10 @@ extern int recursive_action(const char *fileName, unsigned flags, int (*dirAction) (const char *fileName, struct stat* statbuf, void* userData, int depth), void* userData, unsigned depth); extern int device_open(const char *device, int mode); +enum { GETPTY_BUFSIZE = 16 }; /* more than enough for "/dev/ttyXXX" */ +extern int xgetpty(char *line); extern int get_console_fd(void); +extern void console_make_active(int fd, const int vt_num); extern char *find_block_device(const char *path); /* bb_copyfd_XX print read/write errors and return -1 if they occur */ extern off_t bb_copyfd_eof(int fd1, int fd2); @@ -261,20 +318,62 @@ char *xmalloc_readlink(const char *path); char *xmalloc_readlink_or_warn(const char *path); char *xrealloc_getcwd_or_warn(char *cwd); +char *xmalloc_follow_symlinks(const char *path); -//TODO: signal(sid, f) is the same? then why? -extern void sig_catch(int,void (*)(int)); -//#define sig_ignore(s) (sig_catch((s), SIG_IGN)) -//#define sig_uncatch(s) (sig_catch((s), SIG_DFL)) -extern void sig_block(int); -extern void sig_unblock(int); -/* UNUSED: extern void sig_blocknone(void); */ -extern void sig_pause(void); + +enum { + /* bb_signals(BB_FATAL_SIGS, handler) catches all signals which + * otherwise would kill us, except for those resulting from bugs: + * SIGSEGV, SIGILL, SIGFPE. + * Other fatal signals not included (TODO?): + * SIGBUS Bus error (bad memory access) + * SIGPOLL Pollable event. Synonym of SIGIO + * SIGPROF Profiling timer expired + * SIGSYS Bad argument to routine + * SIGTRAP Trace/breakpoint trap + * + * The only known arch with some of these sigs not fitting + * into 32 bits is parisc (SIGXCPU=33, SIGXFSZ=34, SIGSTKFLT=36). + * Dance around with long long to guard against that... + */ + BB_FATAL_SIGS = (int)(0 + + (1LL << SIGHUP) + + (1LL << SIGINT) + + (1LL << SIGTERM) + + (1LL << SIGPIPE) // Write to pipe with no readers + + (1LL << SIGQUIT) // Quit from keyboard + + (1LL << SIGABRT) // Abort signal from abort(3) + + (1LL << SIGALRM) // Timer signal from alarm(2) + + (1LL << SIGVTALRM) // Virtual alarm clock + + (1LL << SIGXCPU) // CPU time limit exceeded + + (1LL << SIGXFSZ) // File size limit exceeded + + (1LL << SIGUSR1) // Yes kids, these are also fatal! + + (1LL << SIGUSR2) + + 0), +}; +void bb_signals(int sigs, void (*f)(int)); +/* Unlike signal() and bb_signals, sets handler with sigaction() + * and in a way that while signal handler is run, no other signals + * will be blocked: */ +void bb_signals_recursive(int sigs, void (*f)(int)); +/* syscalls like read() will be interrupted with EINTR: */ +void signal_no_SA_RESTART_empty_mask(int sig, void (*handler)(int)); +/* syscalls like read() won't be interrupted (though select/poll will be): */ +void signal_SA_RESTART_empty_mask(int sig, void (*handler)(int)); +void wait_for_any_sig(void); +void kill_myself_with_sig(int sig) ATTRIBUTE_NORETURN; +void sig_block(int sig); +void sig_unblock(int sig); +/* Will do sigaction(signum, act, NULL): */ +int sigaction_set(int sig, const struct sigaction *act); +/* SIG_BLOCK/SIG_UNBLOCK all signals: */ +int sigprocmask_allsigs(int how); void xsetgid(gid_t gid); void xsetuid(uid_t uid); void xchdir(const char *path); +void xchroot(const char *path); void xsetenv(const char *key, const char *value); void xunlink(const char *pathname); void xstat(const char *pathname, struct stat *buf); @@ -282,10 +381,46 @@ int xopen(const char *pathname, int flags); int xopen3(const char *pathname, int flags, int mode); int open_or_warn(const char *pathname, int flags); int open3_or_warn(const char *pathname, int flags, int mode); -void xpipe(int filedes[2]); +int open_or_warn_stdin(const char *pathname); +void xrename(const char *oldpath, const char *newpath); +int rename_or_warn(const char *oldpath, const char *newpath); off_t xlseek(int fd, off_t offset, int whence); off_t fdlength(int fd); +void xpipe(int filedes[2]); +/* In this form code with pipes is much more readable */ +struct fd_pair { int rd; int wr; }; +#define piped_pair(pair) pipe(&((pair).rd)) +#define xpiped_pair(pair) xpipe(&((pair).rd)) + +/* Useful for having small structure members/global variables */ +typedef int8_t socktype_t; +typedef int8_t family_t; +struct BUG_too_small { + char BUG_socktype_t_too_small[(0 + | SOCK_STREAM + | SOCK_DGRAM + | SOCK_RDM + | SOCK_SEQPACKET + | SOCK_RAW + ) <= 127 ? 1 : -1]; + char BUG_family_t_too_small[(0 + | AF_UNSPEC + | AF_INET + | AF_INET6 + | AF_UNIX +#ifdef AF_PACKET + | AF_PACKET +#endif +#ifdef AF_NETLINK + | AF_NETLINK +#endif + /* | AF_DECnet */ + /* | AF_IPX */ + ) <= 127 ? 1 : -1]; +}; + + int xsocket(int domain, int type, int protocol); void xbind(int sockfd, struct sockaddr *my_addr, socklen_t addrlen); void xlisten(int s, int backlog); @@ -310,9 +445,10 @@ typedef struct len_and_sockaddr { #if ENABLE_FEATURE_IPV6 struct sockaddr_in6 sin6; #endif - }; + } u; } len_and_sockaddr; enum { + LSA_LEN_SIZE = offsetof(len_and_sockaddr, u), LSA_SIZEOF_SA = sizeof( union { struct sockaddr sa; @@ -328,7 +464,12 @@ enum { * af == AF_UNSPEC will result in trying to create IPv6 socket, * and if kernel doesn't support it, IPv4. */ -int xsocket_type(len_and_sockaddr **lsap, USE_FEATURE_IPV6(int af,) int sock_type); +#if ENABLE_FEATURE_IPV6 +int xsocket_type(len_and_sockaddr **lsap, int af, int sock_type); +#else +int xsocket_type(len_and_sockaddr **lsap, int sock_type); +#define xsocket_type(lsap, af, sock_type) xsocket_type((lsap), (sock_type)) +#endif int xsocket_stream(len_and_sockaddr **lsap); /* Create server socket bound to bindaddr:port. bindaddr can be NULL, * numeric IP ("N.N.N.N") or numeric IPv6 address, @@ -353,14 +494,13 @@ len_and_sockaddr* host2sockaddr(const char *host, int port); /* Version which dies on error */ len_and_sockaddr* xhost2sockaddr(const char *host, int port); len_and_sockaddr* xdotted2sockaddr(const char *host, int port); -#if ENABLE_FEATURE_IPV6 /* Same, useful if you want to force family (e.g. IPv6) */ +#if !ENABLE_FEATURE_IPV6 +#define host_and_af2sockaddr(host, port, af) host2sockaddr((host), (port)) +#define xhost_and_af2sockaddr(host, port, af) xhost2sockaddr((host), (port)) +#else len_and_sockaddr* host_and_af2sockaddr(const char *host, int port, sa_family_t af); len_and_sockaddr* xhost_and_af2sockaddr(const char *host, int port, sa_family_t af); -#else -/* [we evaluate af: think about "host_and_af2sockaddr(..., af++)"] */ -#define host_and_af2sockaddr(host, port, af) ((void)(af), host2sockaddr((host), (port))) -#define xhost_and_af2sockaddr(host, port, af) ((void)(af), xhost2sockaddr((host), (port))) #endif /* Assign sin[6]_port member if the socket is an AF_INET[6] one, * otherwise no-op. Useful for ftp. @@ -386,10 +526,12 @@ struct hostent *xgethostbyname(const char *name); void socket_want_pktinfo(int fd); ssize_t send_to_from(int fd, void *buf, size_t len, int flags, - const struct sockaddr *from, const struct sockaddr *to, + const struct sockaddr *to, + const struct sockaddr *from, socklen_t tolen); ssize_t recv_from_to(int fd, void *buf, size_t len, int flags, - struct sockaddr *from, struct sockaddr *to, + struct sockaddr *from, + struct sockaddr *to, socklen_t sa_size); char *xstrdup(const char *s); @@ -399,6 +541,11 @@ char *safe_strncpy(char *dst, const char *src, size_t size); * But potentially slow, don't use in one-billion-times loops */ int bb_putchar(int ch); char *xasprintf(const char *format, ...) __attribute__ ((format (printf, 1, 2))); +/* Prints unprintable chars ch as ^C or M-c to file + * (M-c is used only if ch is ORed with PRINTABLE_META), + * else it is printed as-is (except for ch = 0x9b) */ +enum { PRINTABLE_META = 0x100 }; +void fputc_printable(int ch, FILE *file); // gcc-4.1.1 still isn't good enough at optimizing it // (+200 bytes compared to macro) //static ALWAYS_INLINE @@ -419,29 +566,43 @@ extern void *xzalloc(size_t size); extern void *xrealloc(void *old, size_t size); extern ssize_t safe_read(int fd, void *buf, size_t count); +extern ssize_t nonblock_safe_read(int fd, void *buf, size_t count); +// NB: will return short read on error, not -1, +// if some data was read before error occurred extern ssize_t full_read(int fd, void *buf, size_t count); extern void xread(int fd, void *buf, size_t count); extern unsigned char xread_char(int fd); -// Read one line a-la fgets. Uses one read(), works only on seekable streams +// Reads one line a-la fgets (but doesn't save terminating '\n'). +// Uses single full_read() call, works only on seekable streams. extern char *reads(int fd, char *buf, size_t count); -// Read one line a-la fgets. Reads byte-by-byte. -// Useful when it is important to not read ahead. -extern char *xmalloc_reads(int fd, char *pfx); -extern ssize_t read_close(int fd, void *buf, size_t count); -extern ssize_t open_read_close(const char *filename, void *buf, size_t count); -extern void *xmalloc_open_read_close(const char *filename, size_t *sizep); +// Reads one line a-la fgets (but doesn't save terminating '\n'). +// Reads byte-by-byte. Useful when it is important to not read ahead. +// Bytes are appended to pfx (which must be malloced, or NULL). +extern char *xmalloc_reads(int fd, char *pfx, size_t *maxsz_p); +extern ssize_t read_close(int fd, void *buf, size_t maxsz); +extern ssize_t open_read_close(const char *filename, void *buf, size_t maxsz); +/* Returns NULL if file can't be opened */ +extern void *xmalloc_open_read_close(const char *filename, size_t *maxsz_p); +/* Never returns NULL */ +extern void *xmalloc_xopen_read_close(const char *filename, size_t *maxsz_p); extern ssize_t safe_write(int fd, const void *buf, size_t count); +// NB: will return short write on error, not -1, +// if some data was written before error occurred extern ssize_t full_write(int fd, const void *buf, size_t count); extern void xwrite(int fd, const void *buf, size_t count); +extern void xopen_xwrite_close(const char* file, const char *str); /* Reads and prints to stdout till eof, then closes FILE. Exits on error: */ extern void xprint_and_close_file(FILE *file); -extern char *xmalloc_fgets(FILE *file); -/* Read up to (and including) TERMINATING_STRING: */ +/* Reads up to (and including) TERMINATING_STRING: */ extern char *xmalloc_fgets_str(FILE *file, const char *terminating_string); +/* Chops off TERMINATING_STRING from the end: */ +extern char *xmalloc_fgetline_str(FILE *file, const char *terminating_string); +/* Reads up to (and including) "\n" or NUL byte: */ +extern char *xmalloc_fgets(FILE *file); /* Chops off '\n' from the end, unlike fgets: */ -extern char *xmalloc_getline(FILE *file); +extern char *xmalloc_fgetline(FILE *file); extern char *bb_get_chunk_from_file(FILE *file, int *end); extern void die_if_ferror(FILE *file, const char *msg); extern void die_if_ferror_stdout(void); @@ -452,14 +613,20 @@ extern FILE *xfopen(const char *filename, const char *mode); /* Prints warning to stderr and returns NULL on failure: */ extern FILE *fopen_or_warn(const char *filename, const char *mode); /* "Opens" stdin if filename is special, else just opens file: */ +extern FILE *xfopen_stdin(const char *filename); extern FILE *fopen_or_warn_stdin(const char *filename); +int bb_pstrcmp(const void *a, const void *b); +void qsort_string_vector(char **sv, unsigned count); + /* Wrapper which restarts poll on EINTR or ENOMEM. * On other errors complains [perror("poll")] and returns. * Warning! May take (much) longer than timeout_ms to return! * If this is a problem, use bare poll and open-code EINTR/ENOMEM handling */ int safe_poll(struct pollfd *ufds, nfds_t nfds, int timeout_ms); +char *safe_gethostname(void); + /* Convert each alpha char in str to lower-case */ char* str_tolower(char *str); @@ -468,7 +635,9 @@ char *itoa(int n); /* Returns a pointer past the formatted number, does NOT null-terminate */ char *utoa_to_buf(unsigned n, char *buf, unsigned buflen); char *itoa_to_buf(int n, char *buf, unsigned buflen); -void smart_ulltoa5(unsigned long long ul, char buf[5]); +/* Intelligent formatters of bignums */ +void smart_ulltoa4(unsigned long long ul, char buf[5], const char *scale); +void smart_ulltoa5(unsigned long long ul, char buf[5], const char *scale); //TODO: provide pointer to buf (avoid statics)? const char *make_human_readable_str(unsigned long long size, unsigned long block_size, unsigned long display_unit); @@ -521,9 +690,12 @@ const char* get_cached_groupname(gid_t gid); void clear_username_cache(void); /* internally usernames are saved in fixed-sized char[] buffers */ enum { USERNAME_MAX_SIZE = 16 - sizeof(int) }; +#if ENABLE_FEATURE_CHECK_NAMES +void die_if_bad_username(const char* name); +#else +#define die_if_bad_username(name) ((void)(name)) +#endif - -struct bb_applet; int execable_file(const char *name); char *find_execable(const char *filename); int exists_execable(const char *filename); @@ -535,7 +707,7 @@ 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) @@ -546,7 +718,8 @@ int bb_execvp(const char *file, char *const argv[]); pid_t spawn(char **argv); pid_t xspawn(char **argv); -/* Unlike waitpid, waits ONLY for one process, +int safe_waitpid(int pid, int *wstat, int options); +/* Unlike waitpid, waits ONLY for one process. * It's safe to pass negative 'pids' from failed [v]fork - * wait4pid will return -1 (and will not clobber [v]fork's errno). * IOW: rc = wait4pid(spawn(argv)); @@ -554,8 +727,7 @@ pid_t xspawn(char **argv); * if (rc > 0) bb_error_msg("exit code: %d", rc); */ int wait4pid(int pid); -int wait_pid(int *wstat, int pid); -int wait_nohang(int *wstat); +int wait_any_nohang(int *wstat); #define wait_crashed(w) ((w) & 127) #define wait_exitcode(w) ((w) >> 8) #define wait_stopsig(w) ((w) >> 8) @@ -564,7 +736,7 @@ int wait_nohang(int *wstat); int spawn_and_wait(char **argv); struct nofork_save_area { jmp_buf die_jmp; - const struct bb_applet *current_applet; + const char *applet_name; int xfunc_error_retval; uint32_t option_mask32; int die_sleep; @@ -573,8 +745,8 @@ 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. * @@ -592,7 +764,7 @@ int run_nofork_applet_prime(struct nofork_save_area *old, const struct bb_applet * * forkexit_or_rexec(argv) = bare-bones "fork + parent exits" on MMU, * "vfork + re-exec ourself" on NOMMU. No fd redirection, no setsid(). - * Currently used for openvt. On MMU ignores argv. + * Currently used for openvt and setsid. On MMU ignores argv. * * Helper for network daemons in foreground mode: * @@ -615,14 +787,20 @@ enum { void re_exec(char **argv) ATTRIBUTE_NORETURN; void forkexit_or_rexec(char **argv); extern bool re_execed; + int BUG_fork_is_unavailable_on_nommu(void); + int BUG_daemon_is_unavailable_on_nommu(void); + void BUG_bb_daemonize_is_unavailable_on_nommu(void); # define fork() BUG_fork_is_unavailable_on_nommu() # define daemon(a,b) BUG_daemon_is_unavailable_on_nommu() # define bb_daemonize(a) BUG_bb_daemonize_is_unavailable_on_nommu() #endif void bb_daemonize_or_rexec(int flags, char **argv); void bb_sanitize_stdio(void); +/* Clear dangerous stuff, set PATH. Return 1 if was run by different user. */ +int sanitize_env_if_suid(void); +extern const char *const bb_argv_dash[]; /* "-", NULL */ extern const char *opt_complementary; #if ENABLE_GETOPT_LONG #define No_argument "\0" @@ -673,7 +851,7 @@ extern int die_sleep; extern int xfunc_error_retval; extern jmp_buf die_jmp; extern void xfunc_die(void) ATTRIBUTE_NORETURN; -extern void bb_show_usage(void) ATTRIBUTE_NORETURN ATTRIBUTE_EXTERNALLY_VISIBLE; +extern void bb_show_usage(void) ATTRIBUTE_NORETURN; extern void bb_error_msg(const char *s, ...) __attribute__ ((format (printf, 1, 2))); extern void bb_error_msg_and_die(const char *s, ...) __attribute__ ((noreturn, format (printf, 1, 2))); extern void bb_perror_msg(const char *s, ...) __attribute__ ((format (printf, 1, 2))); @@ -687,23 +865,32 @@ extern void bb_perror_nomsg(void); extern void bb_info_msg(const char *s, ...) __attribute__ ((format (printf, 1, 2))); extern void bb_verror_msg(const char *s, va_list p, const char *strerr); +/* We need to export XXX_main from libbusybox + * only if we build "individual" binaries + */ +#if ENABLE_FEATURE_INDIVIDUAL +#define MAIN_EXTERNALLY_VISIBLE EXTERNALLY_VISIBLE +#else +#define MAIN_EXTERNALLY_VISIBLE +#endif + /* applets which are useful from another applets */ int bb_cat(char** argv); -int bb_echo(char** argv); -int test_main(int argc, char** argv); -int kill_main(int argc, char **argv); -#if ENABLE_ROUTE -void bb_displayroutes(int noresolve, int netstatfmt); -#endif -int chown_main(int argc, char **argv); -#if ENABLE_GUNZIP -int gunzip_main(int argc, char **argv); -#endif +/* If shell needs them, these three "exist" even if not enabled as applets */ +int echo_main(int argc, char** argv) USE_ECHO(MAIN_EXTERNALLY_VISIBLE); +int test_main(int argc, char **argv) USE_TEST(MAIN_EXTERNALLY_VISIBLE); +int kill_main(int argc, char **argv) USE_KILL(MAIN_EXTERNALLY_VISIBLE); +int chown_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; +int gunzip_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; +int bunzip2_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; int bbunpack(char **argv, char* (*make_new_name)(char *filename), USE_DESKTOP(long long) int (*unpacker)(void) ); +#if ENABLE_ROUTE +void bb_displayroutes(int noresolve, int netstatfmt); +#endif /* Networking */ @@ -739,20 +926,25 @@ struct hwtype { }; extern smallint interface_opt_a; int display_interfaces(char *ifname); +#if ENABLE_FEATURE_HWIB +int in_ib(const char *bufp, struct sockaddr *sap); +#endif const struct aftype *get_aftype(const char *name); const struct hwtype *get_hwtype(const char *name); 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_current_applet_and_exit(char **argv) ATTRIBUTE_NORETURN; +extern void run_applet_no_and_exit(int a, char **argv) ATTRIBUTE_NORETURN; #endif +#ifdef HAVE_MNTENT_H extern int match_fstype(const struct mntent *mt, const char *fstypes); extern struct mntent *find_mount_point(const char *name, const char *table); +#endif extern void erase_mtab(const char * name); extern unsigned int tty_baud_to_value(speed_t speed); extern speed_t tty_value_to_baud(unsigned int value); @@ -771,10 +963,13 @@ extern int set_loop(char **devname, const char *file, unsigned long long offset) //TODO: pass buf pointer or return allocated buf (avoid statics)? char *bb_askpass(int timeout, const char * prompt); int bb_ask_confirmation(void); -int klogctl(int type, char * b, int len); extern int bb_parse_mode(const char* s, mode_t* theMode); +/* Concatenate path and filename to new allocated buffer. + * Add "/" only as needed (no duplicate "//" are produced). + * If path is NULL, it is assumed to be "/". + * filename should not be NULL. */ char *concat_path_file(const char *path, const char *filename); char *concat_subpath_file(const char *path, const char *filename); const char *bb_basename(const char *name); @@ -797,7 +992,6 @@ char *bb_simplify_path(const char *path); #define FAIL_DELAY 3 extern void bb_do_delay(int seconds); extern void change_identity(const struct passwd *pw); -extern const char *change_identity_e2str(const struct passwd *pw); extern void run_shell(const char *shell, int loginshell, const char *command, const char **additional_args) ATTRIBUTE_NORETURN; extern void run_shell(const char *shell, int loginshell, const char *command, const char **additional_args); #if ENABLE_SELINUX @@ -806,33 +1000,39 @@ extern void set_current_security_context(security_context_t sid); extern context_t set_security_context_component(security_context_t cur_context, char *user, char *role, char *type, char *range); extern void setfscreatecon_or_die(security_context_t scontext); +extern void selinux_preserve_fcontext(int fdesc); +#else +#define selinux_preserve_fcontext(fdesc) ((void)0) #endif extern void selinux_or_die(void); extern int restricted_shell(const char *shell); /* setup_environment: - * if loginshell = 1: cd(pw->pw_dir), clear environment, then set + * if clear_env = 1: cd(pw->pw_dir), clear environment, then set * TERM=(old value) * USER=pw->pw_name, LOGNAME=pw->pw_name * PATH=bb_default_[root_]path * HOME=pw->pw_dir * SHELL=shell - * else if changeenv = 1: + * else if change_env = 1: * if not root (if pw->pw_uid != 0): * USER=pw->pw_name, LOGNAME=pw->pw_name * HOME=pw->pw_dir * SHELL=shell * else does nothing */ -extern void setup_environment(const char *shell, int loginshell, int changeenv, const struct passwd *pw); +extern void setup_environment(const char *shell, int clear_env, int change_env, const struct passwd *pw); extern int correct_password(const struct passwd *pw); /* Returns a ptr to static storage */ extern char *pw_encrypt(const char *clear, const char *salt); extern int obscure(const char *old, const char *newval, const struct passwd *pwdp); -extern int index_in_str_array(const char *const string_array[], const char *key); -extern int index_in_strings(const char *strings, const char *key); -extern int index_in_substr_array(const char *const string_array[], const char *key); -extern int index_in_substrings(const char *strings, const char *key); + +int index_in_str_array(const char *const string_array[], const char *key); +int index_in_strings(const char *strings, const char *key); +int index_in_substr_array(const char *const string_array[], const char *key); +int index_in_substrings(const char *strings, const char *key); +const char *nth_string(const char *strings, int n); + extern void print_login_issue(const char *issue_file, const char *tty); extern void print_login_prompt(void); @@ -850,18 +1050,19 @@ extern int update_passwd(const char *filename, const char *username, const char *new_pw); /* NB: typically you want to pass fd 0, not 1. Think 'applet | grep something' */ -int get_terminal_width_height(int fd, int *width, int *height); +int get_terminal_width_height(int fd, unsigned *width, unsigned *height); -int ioctl_or_perror(int fd, int request, void *argp, const char *fmt,...) __attribute__ ((format (printf, 4, 5))); -void ioctl_or_perror_and_die(int fd, int request, void *argp, const char *fmt,...) __attribute__ ((format (printf, 4, 5))); +/* NB: "unsigned request" is crucial! "int request" will break some arches! */ +int ioctl_or_perror(int fd, unsigned request, void *argp, const char *fmt,...) __attribute__ ((format (printf, 4, 5))); +int ioctl_or_perror_and_die(int fd, unsigned request, void *argp, const char *fmt,...) __attribute__ ((format (printf, 4, 5))); #if ENABLE_IOCTL_HEX2STR_ERROR -int bb_ioctl_or_warn(int fd, int request, void *argp, const char *ioctl_name); -void bb_xioctl(int fd, int request, void *argp, const char *ioctl_name); +int bb_ioctl_or_warn(int fd, unsigned request, void *argp, const char *ioctl_name); +int bb_xioctl(int fd, unsigned request, void *argp, const char *ioctl_name); #define ioctl_or_warn(fd,request,argp) bb_ioctl_or_warn(fd,request,argp,#request) #define xioctl(fd,request,argp) bb_xioctl(fd,request,argp,#request) #else -int bb_ioctl_or_warn(int fd, int request, void *argp); -void bb_xioctl(int fd, int request, void *argp); +int bb_ioctl_or_warn(int fd, unsigned request, void *argp); +int bb_xioctl(int fd, unsigned request, void *argp); #define ioctl_or_warn(fd,request,argp) bb_ioctl_or_warn(fd,request,argp) #define xioctl(fd,request,argp) bb_xioctl(fd,request,argp) #endif @@ -905,10 +1106,9 @@ enum { }; line_input_t *new_line_input_t(int flags); /* Returns: - * -1 on read errors or EOF, or on bare Ctrl-D. - * 0 on ctrl-C, + * -1 on read errors or EOF, or on bare Ctrl-D, + * 0 on ctrl-C (the line entered is still returned in 'command'), * >0 length of input string, including terminating '\n' - * [is this true? stores "" in 'command' if return value is 0 or -1] */ int read_line_input(const char* prompt, char* command, int maxsize, line_input_t *state); #else @@ -937,6 +1137,7 @@ typedef struct procps_status_t { * it is memset(0) for each process in procps_scan() */ unsigned long vsz, rss; /* we round it to kbytes */ unsigned long stime, utime; + unsigned long start_time; unsigned pid; unsigned ppid; unsigned pgid; @@ -979,14 +1180,15 @@ enum { PSSCAN_SMAPS = (1 << 15) * ENABLE_FEATURE_TOPMEM, PSSCAN_ARGVN = (1 << 16) * (ENABLE_PGREP | ENABLE_PKILL), USE_SELINUX(PSSCAN_CONTEXT = 1 << 17,) + PSSCAN_START_TIME = 1 << 18, /* These are all retrieved from proc/NN/stat in one go: */ PSSCAN_STAT = PSSCAN_PPID | PSSCAN_PGID | PSSCAN_SID | PSSCAN_COMM | PSSCAN_STATE | PSSCAN_VSZ | PSSCAN_RSS - | PSSCAN_STIME | PSSCAN_UTIME + | PSSCAN_STIME | PSSCAN_UTIME | PSSCAN_START_TIME | PSSCAN_TTY, }; -procps_status_t* alloc_procps_scan(int flags); +//procps_status_t* alloc_procps_scan(void); void free_procps_scan(procps_status_t* sp); procps_status_t* procps_scan(procps_status_t* sp, int flags); /* Format cmdline (up to col chars) into char buf[col+1] */ @@ -1025,24 +1227,8 @@ void *md5_end(void *resbuf, md5_ctx_t *ctx); uint32_t *crc32_filltable(uint32_t *tbl256, int endian); -enum { /* DO NOT CHANGE THESE VALUES! cp.c, mv.c, install.c depend on them. */ - FILEUTILS_PRESERVE_STATUS = 1, - FILEUTILS_DEREFERENCE = 2, - FILEUTILS_RECUR = 4, - FILEUTILS_FORCE = 8, - FILEUTILS_INTERACTIVE = 0x10, - FILEUTILS_MAKE_HARDLINK = 0x20, - FILEUTILS_MAKE_SOFTLINK = 0x40, -#if ENABLE_SELINUX - FILEUTILS_PRESERVE_SECURITY_CONTEXT = 0x80, - FILEUTILS_SET_SECURITY_CONTEXT = 0x100 -#endif -}; - -#define FILEUTILS_CP_OPTSTR "pdRfils" USE_SELINUX("c") -extern const struct bb_applet *current_applet; extern const char *applet_name; -/* "BusyBox vN.N.N (timestamp or extra_vestion)" */ +/* "BusyBox vN.N.N (timestamp or extra_version)" */ extern const char bb_banner[]; extern const char bb_msg_memory_exhausted[]; extern const char bb_msg_invalid_date[]; @@ -1090,10 +1276,14 @@ extern char bb_common_bufsiz1[COMMON_BUFSIZE]; struct globals; /* '*const' ptr makes gcc optimize code much better. * Magic prevents ptr_to_globals from going into rodata. - * If you want to assign a value, use PTR_TO_GLOBALS = xxx */ + * If you want to assign a value, use SET_PTR_TO_GLOBALS(x) */ extern struct globals *const ptr_to_globals; -#define PTR_TO_GLOBALS (*(struct globals**)&ptr_to_globals) - +/* At least gcc 3.4.6 on mipsel system needs optimization barrier */ +#define barrier() asm volatile("":::"memory") +#define SET_PTR_TO_GLOBALS(x) do { \ + (*(struct globals**)&ptr_to_globals) = (x); \ + barrier(); \ +} while (0) /* You can change LIBBB_DEFAULT_LOGIN_SHELL, but don't use it, * use bb_default_login_shell and following defines. @@ -1182,11 +1372,12 @@ extern const char bb_default_login_shell[]; #undef isdigit #define isdigit(a) ((unsigned)((a) - '0') <= 9) +#define ARRAY_SIZE(x) ((unsigned)(sizeof(x) / sizeof((x)[0]))) -#ifdef DMALLOC -#include + +#if __GNUC_PREREQ(4,1) +# pragma GCC visibility pop #endif -#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0])) #endif /* __LIBBUSYBOX_H__ */