/* vi: set sw=4 ts=4: */ /* * Busybox main internal header file * * Based in part on code from sash, Copyright (c) 1999 by David I. Bell * Permission has been granted to redistribute this code under the GPL. * * Licensed under the GPL version 2, see the file LICENSE in this tarball. */ #ifndef __LIBBUSYBOX_H__ #define __LIBBUSYBOX_H__ 1 #include "platform.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #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 #include #else #define setlocale(x,y) ((void)0) #endif #ifdef DMALLOC #include #endif #include #include #if ENABLE_FEATURE_SHADOWPASSWDS # include #endif /* Some libc's forget to declare these, do it ourself */ 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 with all int types (IIRC :]) */ #define MAXINT(T) (T)( \ ((T)-1) > 0 \ ? (T)-1 \ : (T)~((T)1 << (sizeof(T)*8-1)) \ ) #define MININT(T) (T)( \ ((T)-1) > 0 \ ? (T)0 \ : ((T)1 << (sizeof(T)*8-1)) \ ) /* Large file support */ /* 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" * (in today's world - signed 64bit). For full support of large files, * we need a few helper #defines (below) and careful use of off_t * instead of int/ssize_t. No lseek64(), O_LARGEFILE etc necessary */ #if ENABLE_LFS /* CONFIG_LFS is on */ # if ULONG_MAX > 0xffffffff /* "long" is long enough on this system */ # define XATOOFF(a) xatoul_range(a, 0, LONG_MAX) /* usage: sz = BB_STRTOOFF(s, NULL, 10); if (errno || sz < 0) die(); */ # define BB_STRTOOFF bb_strtoul # define STRTOOFF strtoul /* usage: printf("size: %"OFF_FMT"d (%"OFF_FMT"x)\n", sz, sz); */ # define OFF_FMT "l" # else /* "long" is too short, need "long long" */ # define XATOOFF(a) xatoull_range(a, 0, LLONG_MAX) # define BB_STRTOOFF bb_strtoull # define STRTOOFF strtoull # define OFF_FMT "ll" # endif #else /* CONFIG_LFS is off */ # if UINT_MAX == 0xffffffff /* While sizeof(off_t) == sizeof(int), off_t is typedef'ed to long anyway. * gcc will throw warnings on printf("%d", off_t). Crap... */ # define XATOOFF(a) xatoi_u(a) # define BB_STRTOOFF bb_strtou # define STRTOOFF strtol # define OFF_FMT "l" # else # define XATOOFF(a) xatoul_range(a, 0, LONG_MAX) # define BB_STRTOOFF bb_strtoul # define STRTOOFF strtol # define OFF_FMT "l" # endif #endif /* scary. better ideas? (but do *test* them first!) */ #define OFF_T_MAX ((off_t)~((off_t)1 << (sizeof(off_t)*8-1))) /* Some useful definitions */ #undef FALSE #define FALSE ((int) 0) #undef TRUE #define TRUE ((int) 1) #undef SKIP #define SKIP ((int) 2) /* for mtab.c */ #define MTAB_GETMOUNTPT '1' #define MTAB_GETDEVICE '2' #define BUF_SIZE 8192 #define EXPAND_ALLOC 1024 /* Macros for min/max. */ #ifndef MIN #define MIN(a,b) (((a)<(b))?(a):(b)) #endif #ifndef MAX #define MAX(a,b) (((a)>(b))?(a):(b)) #endif /* buffer allocation schemes */ #if ENABLE_FEATURE_BUFFERS_GO_ON_STACK #define RESERVE_CONFIG_BUFFER(buffer,len) char buffer[len] #define RESERVE_CONFIG_UBUFFER(buffer,len) unsigned char buffer[len] #define RELEASE_CONFIG_BUFFER(buffer) ((void)0) #else #if ENABLE_FEATURE_BUFFERS_GO_IN_BSS #define RESERVE_CONFIG_BUFFER(buffer,len) static char buffer[len] #define RESERVE_CONFIG_UBUFFER(buffer,len) static unsigned char buffer[len] #define RELEASE_CONFIG_BUFFER(buffer) ((void)0) #else #define RESERVE_CONFIG_BUFFER(buffer,len) char *buffer = xmalloc(len) #define RESERVE_CONFIG_UBUFFER(buffer,len) unsigned char *buffer = xmalloc(len) #define RELEASE_CONFIG_BUFFER(buffer) free(buffer) #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 :) */ extern int *const bb_errno; #undef errno #define errno (*bb_errno) #endif unsigned long long monotonic_ns(void) FAST_FUNC; unsigned long long monotonic_us(void) FAST_FUNC; unsigned monotonic_sec(void) FAST_FUNC; extern void chomp(char *s) FAST_FUNC; extern void trim(char *s) FAST_FUNC; extern char *skip_whitespace(const char *) FAST_FUNC; extern char *skip_non_whitespace(const char *) FAST_FUNC; extern char *strrstr(const char *haystack, const char *needle) FAST_FUNC; //TODO: supply a pointer to char[11] buffer (avoid statics)? extern const char *bb_mode_string(mode_t mode) FAST_FUNC; extern int is_directory(const char *name, int followLinks, struct stat *statBuf) FAST_FUNC; 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) FAST_FUNC; /* 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) FAST_FUNC; enum { ACTION_RECURSE = (1 << 0), ACTION_FOLLOWLINKS = (1 << 1), ACTION_FOLLOWLINKS_L0 = (1 << 2), ACTION_DEPTHFIRST = (1 << 3), /*ACTION_REVERSE = (1 << 4), - unused */ ACTION_QUIET = (1 << 5), }; extern int recursive_action(const char *fileName, unsigned flags, int FAST_FUNC (*fileAction)(const char *fileName, struct stat* statbuf, void* userData, int depth), int FAST_FUNC (*dirAction)(const char *fileName, struct stat* statbuf, void* userData, int depth), void* userData, unsigned depth) FAST_FUNC; extern int device_open(const char *device, int mode) FAST_FUNC; enum { GETPTY_BUFSIZE = 16 }; /* more than enough for "/dev/ttyXXX" */ extern int xgetpty(char *line) FAST_FUNC; extern int get_console_fd_or_die(void) FAST_FUNC; extern void console_make_active(int fd, const int vt_num) FAST_FUNC; extern char *find_block_device(const char *path) FAST_FUNC; /* bb_copyfd_XX print read/write errors and return -1 if they occur */ extern off_t bb_copyfd_eof(int fd1, int fd2) FAST_FUNC; extern off_t bb_copyfd_size(int fd1, int fd2, off_t size) FAST_FUNC; extern void bb_copyfd_exact_size(int fd1, int fd2, off_t size) FAST_FUNC; /* "short" copy can be detected by return value < size */ /* this helper yells "short read!" if param is not -1 */ extern void complain_copyfd_and_die(off_t sz) NORETURN FAST_FUNC; extern char bb_process_escape_sequence(const char **ptr) FAST_FUNC; /* xxxx_strip version can modify its parameter: * "/" -> "/" * "abc" -> "abc" * "abc/def" -> "def" * "abc/def/" -> "def" !! */ extern char *bb_get_last_path_component_strip(char *path) FAST_FUNC; /* "abc/def/" -> "" and it never modifies 'path' */ extern char *bb_get_last_path_component_nostrip(const char *path) FAST_FUNC; int ndelay_on(int fd) FAST_FUNC; int ndelay_off(int fd) FAST_FUNC; int close_on_exec_on(int fd) FAST_FUNC; void xdup2(int, int) FAST_FUNC; void xmove_fd(int, int) FAST_FUNC; DIR *xopendir(const char *path) FAST_FUNC; DIR *warn_opendir(const char *path) FAST_FUNC; /* UNUSED: char *xmalloc_realpath(const char *path) FAST_FUNC; */ char *xmalloc_readlink(const char *path) FAST_FUNC; char *xmalloc_readlink_or_warn(const char *path) FAST_FUNC; char *xrealloc_getcwd_or_warn(char *cwd) FAST_FUNC; char *xmalloc_follow_symlinks(const char *path) FAST_FUNC; 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)) FAST_FUNC; /* 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)) FAST_FUNC; /* syscalls like read() will be interrupted with EINTR: */ void signal_no_SA_RESTART_empty_mask(int sig, void (*handler)(int)) FAST_FUNC; /* syscalls like read() won't be interrupted (though select/poll will be): */ void signal_SA_RESTART_empty_mask(int sig, void (*handler)(int)) FAST_FUNC; void wait_for_any_sig(void) FAST_FUNC; void kill_myself_with_sig(int sig) NORETURN FAST_FUNC; void sig_block(int sig) FAST_FUNC; void sig_unblock(int sig) FAST_FUNC; /* Will do sigaction(signum, act, NULL): */ int sigaction_set(int sig, const struct sigaction *act) FAST_FUNC; /* SIG_BLOCK/SIG_UNBLOCK all signals: */ int sigprocmask_allsigs(int how) FAST_FUNC; /* Standard handler which just records signo */ extern smallint bb_got_signal; void record_signo(int signo); /* not FAST_FUNC! */ void xsetgid(gid_t gid) FAST_FUNC; void xsetuid(uid_t uid) FAST_FUNC; void xchdir(const char *path) FAST_FUNC; void xchroot(const char *path) FAST_FUNC; void xsetenv(const char *key, const char *value) FAST_FUNC; void xunlink(const char *pathname) FAST_FUNC; void xstat(const char *pathname, struct stat *buf) FAST_FUNC; int xopen(const char *pathname, int flags) FAST_FUNC FAST_FUNC; int xopen3(const char *pathname, int flags, int mode) FAST_FUNC; int open_or_warn(const char *pathname, int flags) FAST_FUNC; int open3_or_warn(const char *pathname, int flags, int mode) FAST_FUNC; int open_or_warn_stdin(const char *pathname) FAST_FUNC; void xrename(const char *oldpath, const char *newpath) FAST_FUNC; int rename_or_warn(const char *oldpath, const char *newpath) FAST_FUNC; off_t xlseek(int fd, off_t offset, int whence) FAST_FUNC; off_t fdlength(int fd) FAST_FUNC; void xpipe(int filedes[2]) FAST_FUNC; /* 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) FAST_FUNC; void xbind(int sockfd, struct sockaddr *my_addr, socklen_t addrlen) FAST_FUNC; void xlisten(int s, int backlog) FAST_FUNC; void xconnect(int s, const struct sockaddr *s_addr, socklen_t addrlen) FAST_FUNC; ssize_t xsendto(int s, const void *buf, size_t len, const struct sockaddr *to, socklen_t tolen) FAST_FUNC; /* SO_REUSEADDR allows a server to rebind to an address that is already * "in use" by old connections to e.g. previous server instance which is * killed or crashed. Without it bind will fail until all such connections * time out. Linux does not allow multiple live binds on same ip:port * regardless of SO_REUSEADDR (unlike some other flavors of Unix). * Turn it on before you call bind(). */ void setsockopt_reuseaddr(int fd) FAST_FUNC; /* On Linux this never fails. */ int setsockopt_broadcast(int fd) FAST_FUNC; int setsockopt_bindtodevice(int fd, const char *iface) FAST_FUNC; /* NB: returns port in host byte order */ unsigned bb_lookup_port(const char *port, const char *protocol, unsigned default_port) FAST_FUNC; typedef struct len_and_sockaddr { socklen_t len; union { struct sockaddr sa; struct sockaddr_in sin; #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; struct sockaddr_in sin; #if ENABLE_FEATURE_IPV6 struct sockaddr_in6 sin6; #endif } ) }; /* Create stream socket, and allocate suitable lsa. * (lsa of correct size and lsa->sa.sa_family (AF_INET/AF_INET6)) * af == AF_UNSPEC will result in trying to create IPv6 socket, * and if kernel doesn't support it, IPv4. */ #if ENABLE_FEATURE_IPV6 int xsocket_type(len_and_sockaddr **lsap, int af, int sock_type) FAST_FUNC; #else int xsocket_type(len_and_sockaddr **lsap, int sock_type) FAST_FUNC; #define xsocket_type(lsap, af, sock_type) xsocket_type((lsap), (sock_type)) #endif int xsocket_stream(len_and_sockaddr **lsap) FAST_FUNC; /* Create server socket bound to bindaddr:port. bindaddr can be NULL, * numeric IP ("N.N.N.N") or numeric IPv6 address, * and can have ":PORT" suffix (for IPv6 use "[X:X:...:X]:PORT"). * Only if there is no suffix, port argument is used */ /* NB: these set SO_REUSEADDR before bind */ int create_and_bind_stream_or_die(const char *bindaddr, int port) FAST_FUNC; int create_and_bind_dgram_or_die(const char *bindaddr, int port) FAST_FUNC; /* Create client TCP socket connected to peer:port. Peer cannot be NULL. * Peer can be numeric IP ("N.N.N.N"), numeric IPv6 address or hostname, * and can have ":PORT" suffix (for IPv6 use "[X:X:...:X]:PORT"). * If there is no suffix, port argument is used */ int create_and_connect_stream_or_die(const char *peer, int port) FAST_FUNC; /* Connect to peer identified by lsa */ int xconnect_stream(const len_and_sockaddr *lsa) FAST_FUNC; /* Return malloc'ed len_and_sockaddr with socket address of host:port * Currently will return IPv4 or IPv6 sockaddrs only * (depending on host), but in theory nothing prevents e.g. * UNIX socket address being returned, IPX sockaddr etc... * On error does bb_error_msg and returns NULL */ len_and_sockaddr* host2sockaddr(const char *host, int port) FAST_FUNC; /* Version which dies on error */ len_and_sockaddr* xhost2sockaddr(const char *host, int port) FAST_FUNC; len_and_sockaddr* xdotted2sockaddr(const char *host, int port) FAST_FUNC; /* 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) FAST_FUNC; len_and_sockaddr* xhost_and_af2sockaddr(const char *host, int port, sa_family_t af) FAST_FUNC; #endif /* Assign sin[6]_port member if the socket is an AF_INET[6] one, * otherwise no-op. Useful for ftp. * NB: does NOT do htons() internally, just direct assignment. */ void set_nport(len_and_sockaddr *lsa, unsigned port) FAST_FUNC; /* Retrieve sin[6]_port or return -1 for non-INET[6] lsa's */ int get_nport(const struct sockaddr *sa) FAST_FUNC; /* Reverse DNS. Returns NULL on failure. */ char* xmalloc_sockaddr2host(const struct sockaddr *sa) FAST_FUNC; /* This one doesn't append :PORTNUM */ char* xmalloc_sockaddr2host_noport(const struct sockaddr *sa) FAST_FUNC; /* This one also doesn't fall back to dotted IP (returns NULL) */ char* xmalloc_sockaddr2hostonly_noport(const struct sockaddr *sa) FAST_FUNC; /* inet_[ap]ton on steroids */ char* xmalloc_sockaddr2dotted(const struct sockaddr *sa) FAST_FUNC; char* xmalloc_sockaddr2dotted_noport(const struct sockaddr *sa) FAST_FUNC; // "old" (ipv4 only) API // users: traceroute.c hostname.c - use _list_ of all IPs struct hostent *xgethostbyname(const char *name) FAST_FUNC; // Also mount.c and inetd.c are using gethostbyname(), // + inet_common.c has additional IPv4-only stuff void socket_want_pktinfo(int fd) FAST_FUNC; ssize_t send_to_from(int fd, void *buf, size_t len, int flags, const struct sockaddr *to, const struct sockaddr *from, socklen_t tolen) FAST_FUNC; ssize_t recv_from_to(int fd, void *buf, size_t len, int flags, struct sockaddr *from, struct sockaddr *to, socklen_t sa_size) FAST_FUNC; char *xstrdup(const char *s) FAST_FUNC; char *xstrndup(const char *s, int n) FAST_FUNC; void overlapping_strcpy(char *dst, const char *src) FAST_FUNC; char *safe_strncpy(char *dst, const char *src, size_t size) FAST_FUNC; /* Guaranteed to NOT be a macro (smallest code). Saves nearly 2k on uclibc. * But potentially slow, don't use in one-billion-times loops */ int bb_putchar(int ch) FAST_FUNC; char *xasprintf(const char *format, ...) __attribute__ ((format (printf, 1, 2))) FAST_FUNC; /* 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) FAST_FUNC; // gcc-4.1.1 still isn't good enough at optimizing it // (+200 bytes compared to macro) //static ALWAYS_INLINE //int LONE_DASH(const char *s) { return s[0] == '-' && !s[1]; } //static ALWAYS_INLINE //int NOT_LONE_DASH(const char *s) { return s[0] != '-' || s[1]; } #define LONE_DASH(s) ((s)[0] == '-' && !(s)[1]) #define NOT_LONE_DASH(s) ((s)[0] != '-' || (s)[1]) #define LONE_CHAR(s,c) ((s)[0] == (c) && !(s)[1]) #define NOT_LONE_CHAR(s,c) ((s)[0] != (c) || (s)[1]) #define DOT_OR_DOTDOT(s) ((s)[0] == '.' && (!(s)[1] || ((s)[1] == '.' && !(s)[2]))) /* dmalloc will redefine these to it's own implementation. It is safe * to have the prototypes here unconditionally. */ void *malloc_or_warn(size_t size) FAST_FUNC; void *xmalloc(size_t size) FAST_FUNC; void *xzalloc(size_t size) FAST_FUNC; void *xrealloc(void *old, size_t size) FAST_FUNC; /* After xrealloc_vector(v, 4, idx) it's ok to use * at least v[idx] and v[idx+1], for all idx values. * shift specifies how many new elements are added (1: 2, 2: 4... 8: 256...) * when all elements are used up. New elements are zeroed out. */ #define xrealloc_vector(vector, shift, idx) \ xrealloc_vector_helper((vector), (sizeof((vector)[0]) << 8) + (shift), (idx)) void* xrealloc_vector_helper(void *vector, unsigned sizeof_and_shift, int idx) FAST_FUNC; extern ssize_t safe_read(int fd, void *buf, size_t count) FAST_FUNC; extern ssize_t nonblock_safe_read(int fd, void *buf, size_t count) FAST_FUNC; // 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) FAST_FUNC; extern void xread(int fd, void *buf, size_t count) FAST_FUNC; extern unsigned char xread_char(int fd) FAST_FUNC; extern ssize_t read_close(int fd, void *buf, size_t maxsz) FAST_FUNC; extern ssize_t open_read_close(const char *filename, void *buf, size_t maxsz) FAST_FUNC; // 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) FAST_FUNC; /* Reads block up to *maxsz_p (default: MAX_INT(ssize_t)) */ extern void *xmalloc_read(int fd, size_t *maxsz_p) FAST_FUNC; /* Returns NULL if file can't be opened */ extern void *xmalloc_open_read_close(const char *filename, size_t *maxsz_p) FAST_FUNC; /* Autodetects .gz etc */ extern int open_zipped(const char *fname) FAST_FUNC; extern void *xmalloc_open_zipped_read_close(const char *fname, size_t *maxsz_p) FAST_FUNC; /* Never returns NULL */ extern void *xmalloc_xopen_read_close(const char *filename, size_t *maxsz_p) FAST_FUNC; extern ssize_t safe_write(int fd, const void *buf, size_t count) FAST_FUNC; // 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) FAST_FUNC; extern void xwrite(int fd, const void *buf, size_t count) FAST_FUNC; extern void xopen_xwrite_close(const char* file, const char *str) FAST_FUNC; /* Reads and prints to stdout till eof, then closes FILE. Exits on error: */ extern void xprint_and_close_file(FILE *file) FAST_FUNC; extern char *bb_get_chunk_from_file(FILE *file, int *end) FAST_FUNC; extern char *bb_get_chunk_with_continuation(FILE *file, int *end, int *lineno) FAST_FUNC; /* Reads up to (and including) TERMINATING_STRING: */ extern char *xmalloc_fgets_str(FILE *file, const char *terminating_string) FAST_FUNC; /* Chops off TERMINATING_STRING from the end: */ extern char *xmalloc_fgetline_str(FILE *file, const char *terminating_string) FAST_FUNC; /* Reads up to (and including) "\n" or NUL byte: */ extern char *xmalloc_fgets(FILE *file) FAST_FUNC; /* Chops off '\n' from the end, unlike fgets: */ extern char *xmalloc_fgetline(FILE *file) FAST_FUNC; /* Same, but doesn't try to conserve space (may have some slack after the end) */ /* extern char *xmalloc_fgetline_fast(FILE *file) FAST_FUNC; */ extern void die_if_ferror(FILE *file, const char *msg) FAST_FUNC; extern void die_if_ferror_stdout(void) FAST_FUNC; extern void xfflush_stdout(void) FAST_FUNC; extern void fflush_stdout_and_exit(int retval) NORETURN FAST_FUNC; extern int fclose_if_not_stdin(FILE *file) FAST_FUNC; extern FILE *xfopen(const char *filename, const char *mode) FAST_FUNC; /* Prints warning to stderr and returns NULL on failure: */ extern FILE *fopen_or_warn(const char *filename, const char *mode) FAST_FUNC; /* "Opens" stdin if filename is special, else just opens file: */ extern FILE *xfopen_stdin(const char *filename) FAST_FUNC; extern FILE *fopen_or_warn_stdin(const char *filename) FAST_FUNC; extern FILE* fopen_for_read(const char *path) FAST_FUNC; extern FILE* xfopen_for_read(const char *path) FAST_FUNC; extern FILE* fopen_for_write(const char *path) FAST_FUNC; extern FILE* xfopen_for_write(const char *path) FAST_FUNC; int bb_pstrcmp(const void *a, const void *b) /* not FAST_FUNC! */; void qsort_string_vector(char **sv, unsigned count) FAST_FUNC; /* 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) FAST_FUNC; char *safe_gethostname(void) FAST_FUNC; char *safe_getdomainname(void) FAST_FUNC; /* Convert each alpha char in str to lower-case */ char* str_tolower(char *str) FAST_FUNC; char *utoa(unsigned n) FAST_FUNC; char *itoa(int n) FAST_FUNC; /* Returns a pointer past the formatted number, does NOT null-terminate */ char *utoa_to_buf(unsigned n, char *buf, unsigned buflen) FAST_FUNC; char *itoa_to_buf(int n, char *buf, unsigned buflen) FAST_FUNC; /* Intelligent formatters of bignums */ void smart_ulltoa4(unsigned long long ul, char buf[5], const char *scale) FAST_FUNC; void smart_ulltoa5(unsigned long long ul, char buf[5], const char *scale) FAST_FUNC; //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) FAST_FUNC; /* Put a string of hex bytes ("1b2e66fe"...), return advanced pointer */ char *bin2hex(char *buf, const char *cp, int count) FAST_FUNC; /* Last element is marked by mult == 0 */ struct suffix_mult { char suffix[4]; unsigned mult; }; #include "xatonum.h" /* Specialized: */ /* Using xatoi() instead of naive atoi() is not always convenient - * in many places people want *non-negative* values, but store them * in signed int. Therefore we need this one: * dies if input is not in [0, INT_MAX] range. Also will reject '-0' etc */ int xatoi_u(const char *numstr) FAST_FUNC; /* Useful for reading port numbers */ uint16_t xatou16(const char *numstr) FAST_FUNC; /* These parse entries in /etc/passwd and /etc/group. This is desirable * for BusyBox since we want to avoid using the glibc NSS stuff, which * increases target size and is often not needed on embedded systems. */ long xuname2uid(const char *name) FAST_FUNC; long xgroup2gid(const char *name) FAST_FUNC; /* wrapper: allows string to contain numeric uid or gid */ unsigned long get_ug_id(const char *s, long FAST_FUNC (*xname2id)(const char *)) FAST_FUNC; /* from chpst. Does not die, returns 0 on failure */ struct bb_uidgid_t { uid_t uid; gid_t gid; }; /* always sets uid and gid */ int get_uidgid(struct bb_uidgid_t*, const char*, int numeric_ok) FAST_FUNC; /* always sets uid and gid, allows numeric; exits on failure */ void xget_uidgid(struct bb_uidgid_t*, const char*) FAST_FUNC; /* chown-like handling of "user[:[group]" */ void parse_chown_usergroup_or_die(struct bb_uidgid_t *u, char *user_group) FAST_FUNC; /* bb_getpwuid, bb_getgrgid: * bb_getXXXid(buf, bufsz, id) - copy user/group name or id * as a string to buf, return user/group name or NULL * bb_getXXXid(NULL, 0, id) - return user/group name or NULL * bb_getXXXid(NULL, -1, id) - return user/group name or exit */ char *bb_getpwuid(char *name, int bufsize, long uid) FAST_FUNC; char *bb_getgrgid(char *group, int bufsize, long gid) FAST_FUNC; /* versions which cache results (useful for ps, ls etc) */ const char* get_cached_username(uid_t uid) FAST_FUNC; const char* get_cached_groupname(gid_t gid) FAST_FUNC; void clear_username_cache(void) FAST_FUNC; /* 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) FAST_FUNC; #else #define die_if_bad_username(name) ((void)(name)) #endif int execable_file(const char *name) FAST_FUNC; char *find_execable(const char *filename, char **PATHp) FAST_FUNC; int exists_execable(const char *filename) FAST_FUNC; /* BB_EXECxx always execs (it's not doing NOFORK/NOEXEC stuff), * but it may exec busybox and call applet instead of searching PATH. */ #if ENABLE_FEATURE_PREFER_APPLETS int bb_execvp(const char *file, char *const argv[]) FAST_FUNC; #define BB_EXECVP(prog,cmd) bb_execvp(prog,cmd) #define BB_EXECLP(prog,cmd,...) \ execlp((find_applet_by_name(prog) >= 0) ? CONFIG_BUSYBOX_EXEC_PATH : prog, \ cmd, __VA_ARGS__) #else #define BB_EXECVP(prog,cmd) execvp(prog,cmd) #define BB_EXECLP(prog,cmd,...) execlp(prog,cmd, __VA_ARGS__) #endif /* NOMMU friendy fork+exec */ pid_t spawn(char **argv) FAST_FUNC; pid_t xspawn(char **argv) FAST_FUNC; pid_t safe_waitpid(pid_t pid, int *wstat, int options) FAST_FUNC; /* 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)); * if (rc < 0) bb_perror_msg("%s", argv[0]); * if (rc > 0) bb_error_msg("exit code: %d", rc); */ int wait4pid(pid_t pid) FAST_FUNC; pid_t wait_any_nohang(int *wstat) FAST_FUNC; #define wait_crashed(w) ((w) & 127) #define wait_exitcode(w) ((w) >> 8) #define wait_stopsig(w) ((w) >> 8) #define wait_stopped(w) (((w) & 127) == 127) /* wait4pid(spawn(argv)) + NOFORK/NOEXEC (if configured) */ pid_t spawn_and_wait(char **argv) FAST_FUNC; struct nofork_save_area { jmp_buf die_jmp; const char *applet_name; int xfunc_error_retval; uint32_t option_mask32; int die_sleep; smallint saved; }; void save_nofork_data(struct nofork_save_area *save) FAST_FUNC; void restore_nofork_data(struct nofork_save_area *save) FAST_FUNC; /* Does NOT check that applet is NOFORK, just blindly runs it */ int run_nofork_applet(int applet_no, char **argv) FAST_FUNC; int run_nofork_applet_prime(struct nofork_save_area *old, int applet_no, char **argv) FAST_FUNC; /* Helpers for daemonization. * * bb_daemonize(flags) = daemonize, does not compile on NOMMU * * bb_daemonize_or_rexec(flags, argv) = daemonizes on MMU (and ignores argv), * rexec's itself on NOMMU with argv passed as command line. * Thus bb_daemonize_or_rexec may cause your _main() to be re-executed * from the start. (It will detect it and not reexec again second time). * You have to audit carefully that you don't do something twice as a result * (opening files/sockets, parsing config files etc...)! * * Both of the above will redirect fd 0,1,2 to /dev/null and drop ctty * (will do setsid()). * * 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 setsid only. On MMU ignores argv. * * Helper for network daemons in foreground mode: * * bb_sanitize_stdio() = make sure that fd 0,1,2 are opened by opening them * to /dev/null if they are not. */ enum { DAEMON_CHDIR_ROOT = 1, DAEMON_DEVNULL_STDIO = 2, DAEMON_CLOSE_EXTRA_FDS = 4, DAEMON_ONLY_SANITIZE = 8, /* internal use */ }; #if BB_MMU void forkexit_or_rexec(void) FAST_FUNC; enum { re_execed = 0 }; # define forkexit_or_rexec(argv) forkexit_or_rexec() # define bb_daemonize_or_rexec(flags, argv) bb_daemonize_or_rexec(flags) # define bb_daemonize(flags) bb_daemonize_or_rexec(flags, bogus) #else void re_exec(char **argv) NORETURN FAST_FUNC; void forkexit_or_rexec(char **argv) FAST_FUNC; extern bool re_execed; int BUG_fork_is_unavailable_on_nommu(void) FAST_FUNC; int BUG_daemon_is_unavailable_on_nommu(void) FAST_FUNC; void BUG_bb_daemonize_is_unavailable_on_nommu(void) FAST_FUNC; # 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) FAST_FUNC; void bb_sanitize_stdio(void) FAST_FUNC; /* Clear dangerous stuff, set PATH. Return 1 if was run by different user. */ int sanitize_env_if_suid(void) FAST_FUNC; extern const char *const bb_argv_dash[]; /* "-", NULL */ extern const char *opt_complementary; #if ENABLE_GETOPT_LONG #define No_argument "\0" #define Required_argument "\001" #define Optional_argument "\002" extern const char *applet_long_options; #endif extern uint32_t option_mask32; extern uint32_t getopt32(char **argv, const char *applet_opts, ...) FAST_FUNC; typedef struct llist_t { char *data; struct llist_t *link; } llist_t; void llist_add_to(llist_t **old_head, void *data) FAST_FUNC; void llist_add_to_end(llist_t **list_head, void *data) FAST_FUNC; void *llist_pop(llist_t **elm) FAST_FUNC; void llist_unlink(llist_t **head, llist_t *elm) FAST_FUNC; void llist_free(llist_t *elm, void (*freeit)(void *data)) FAST_FUNC; llist_t *llist_rev(llist_t *list) FAST_FUNC; /* BTW, surprisingly, changing API to * llist_t *llist_add_to(llist_t *old_head, void *data) * etc does not result in smaller code... */ /* start_stop_daemon and udhcpc are special - they want * to create pidfiles regardless of FEATURE_PIDFILE */ #if ENABLE_FEATURE_PIDFILE || defined(WANT_PIDFILE) /* True only if we created pidfile which is *file*, not /dev/null etc */ extern smallint wrote_pidfile; void write_pidfile(const char *path) FAST_FUNC; #define remove_pidfile(path) do { if (wrote_pidfile) unlink(path); } while (0) #else enum { wrote_pidfile = 0 }; #define write_pidfile(path) ((void)0) #define remove_pidfile(path) ((void)0) #endif enum { LOGMODE_NONE = 0, LOGMODE_STDIO = (1 << 0), LOGMODE_SYSLOG = (1 << 1) * ENABLE_FEATURE_SYSLOG, LOGMODE_BOTH = LOGMODE_SYSLOG + LOGMODE_STDIO, }; extern const char *msg_eol; extern smallint logmode; extern int die_sleep; extern int xfunc_error_retval; extern jmp_buf die_jmp; extern void xfunc_die(void) NORETURN FAST_FUNC; extern void bb_show_usage(void) NORETURN FAST_FUNC; extern void bb_error_msg(const char *s, ...) __attribute__ ((format (printf, 1, 2))) FAST_FUNC; extern void bb_error_msg_and_die(const char *s, ...) __attribute__ ((noreturn, format (printf, 1, 2))) FAST_FUNC; extern void bb_perror_msg(const char *s, ...) __attribute__ ((format (printf, 1, 2))) FAST_FUNC; extern void bb_simple_perror_msg(const char *s) FAST_FUNC; extern void bb_perror_msg_and_die(const char *s, ...) __attribute__ ((noreturn, format (printf, 1, 2))) FAST_FUNC; extern void bb_simple_perror_msg_and_die(const char *s) __attribute__ ((noreturn)) FAST_FUNC; extern void bb_herror_msg(const char *s, ...) __attribute__ ((format (printf, 1, 2))) FAST_FUNC; extern void bb_herror_msg_and_die(const char *s, ...) __attribute__ ((noreturn, format (printf, 1, 2))) FAST_FUNC; extern void bb_perror_nomsg_and_die(void) NORETURN FAST_FUNC; extern void bb_perror_nomsg(void) FAST_FUNC; extern void bb_info_msg(const char *s, ...) __attribute__ ((format (printf, 1, 2))) FAST_FUNC; extern void bb_verror_msg(const char *s, va_list p, const char *strerr) FAST_FUNC; /* 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); /* If shell needs them, they exist even if not enabled as applets */ int echo_main(int argc, char** argv) USE_ECHO(MAIN_EXTERNALLY_VISIBLE); int printf_main(int argc, char **argv) USE_PRINTF(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); /* Similar, but used by chgrp, not shell */ int chown_main(int argc, char **argv) USE_CHOWN(MAIN_EXTERNALLY_VISIBLE); /* Don't need USE_xxx() guard for these */ int gunzip_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; int bunzip2_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; #if ENABLE_ROUTE void bb_displayroutes(int noresolve, int netstatfmt) FAST_FUNC; #endif /* "Keycodes" that report an escape sequence. * We use something which fits into signed char, * yet doesn't represent any valid Unicode characher. * Also, -1 is reserved for error indication and we don't use it. */ enum { KEYCODE_UP = -2, KEYCODE_DOWN = -3, KEYCODE_RIGHT = -4, KEYCODE_LEFT = -5, KEYCODE_HOME = -6, KEYCODE_END = -7, KEYCODE_INSERT = -8, KEYCODE_DELETE = -9, KEYCODE_PAGEUP = -10, KEYCODE_PAGEDOWN = -11, #if 0 KEYCODE_FUN1 = -12, KEYCODE_FUN2 = -13, KEYCODE_FUN3 = -14, KEYCODE_FUN4 = -15, KEYCODE_FUN5 = -16, KEYCODE_FUN6 = -17, KEYCODE_FUN7 = -18, KEYCODE_FUN8 = -19, KEYCODE_FUN9 = -20, KEYCODE_FUN10 = -21, KEYCODE_FUN11 = -22, KEYCODE_FUN12 = -23, #endif /* How long the longest ESC sequence we know? */ KEYCODE_BUFFER_SIZE = 4 }; int read_key(int fd, smalluint *nbuffered, char *buffer) FAST_FUNC; /* Networking */ int create_icmp_socket(void) FAST_FUNC; int create_icmp6_socket(void) FAST_FUNC; /* interface.c */ /* This structure defines protocol families and their handlers. */ struct aftype { const char *name; const char *title; int af; int alen; char* FAST_FUNC (*print)(unsigned char *); const char* FAST_FUNC (*sprint)(struct sockaddr *, int numeric); int FAST_FUNC (*input)(/*int type,*/ const char *bufp, struct sockaddr *); void FAST_FUNC (*herror)(char *text); int FAST_FUNC (*rprint)(int options); int FAST_FUNC (*rinput)(int typ, int ext, char **argv); /* may modify src */ int FAST_FUNC (*getmask)(char *src, struct sockaddr *mask, char *name); }; /* This structure defines hardware protocols and their handlers. */ struct hwtype { const char *name; const char *title; int type; int alen; char* FAST_FUNC (*print)(unsigned char *); int FAST_FUNC (*input)(const char *, struct sockaddr *); int FAST_FUNC (*activate)(int fd); int suppress_null_addr; }; extern smallint interface_opt_a; int display_interfaces(char *ifname) FAST_FUNC; #if ENABLE_FEATURE_HWIB int in_ib(const char *bufp, struct sockaddr *sap) FAST_FUNC; #else #define in_ib(a, b) 1 /* fail */ #endif const struct aftype *get_aftype(const char *name) FAST_FUNC; const struct hwtype *get_hwtype(const char *name) FAST_FUNC; const struct hwtype *get_hwntype(int type) FAST_FUNC; #ifndef BUILD_INDIVIDUAL extern int find_applet_by_name(const char *name) FAST_FUNC; /* Returns only if applet is not found. */ extern void run_applet_and_exit(const char *name, char **argv) FAST_FUNC; extern void run_applet_no_and_exit(int a, char **argv) NORETURN FAST_FUNC; #endif #ifdef HAVE_MNTENT_H extern int match_fstype(const struct mntent *mt, const char *fstypes) FAST_FUNC; extern struct mntent *find_mount_point(const char *name, const char *table) FAST_FUNC; #endif extern void erase_mtab(const char * name) FAST_FUNC; extern unsigned int tty_baud_to_value(speed_t speed) FAST_FUNC; extern speed_t tty_value_to_baud(unsigned int value) FAST_FUNC; extern void bb_warn_ignoring_args(int n) FAST_FUNC; extern int get_linux_version_code(void) FAST_FUNC; extern char *query_loop(const char *device) FAST_FUNC; extern int del_loop(const char *device) FAST_FUNC; /* If *devname is not NULL, use that name, otherwise try to find free one, * malloc and return it in *devname. * return value: 1: read-only loopdev was setup, 0: rw, < 0: error */ extern int set_loop(char **devname, const char *file, unsigned long long offset) FAST_FUNC; //TODO: pass buf pointer or return allocated buf (avoid statics)? char *bb_askpass(int timeout, const char * prompt) FAST_FUNC; int bb_ask_confirmation(void) FAST_FUNC; int bb_parse_mode(const char* s, mode_t* theMode) FAST_FUNC; /* * Config file parser */ enum { PARSE_COLLAPSE = 0x00010000, // treat consecutive delimiters as one PARSE_TRIM = 0x00020000, // trim leading and trailing delimiters // TODO: COLLAPSE and TRIM seem to always go in pair PARSE_GREEDY = 0x00040000, // last token takes entire remainder of the line PARSE_MIN_DIE = 0x00100000, // die if < min tokens found // keep a copy of current line PARSE_KEEP_COPY = 0x00200000 * ENABLE_FEATURE_CROND_D, // PARSE_ESCAPE = 0x00400000, // process escape sequences in tokens // NORMAL is: // * remove leading and trailing delimiters and collapse // multiple delimiters into one // * warn and continue if less than mintokens delimiters found // * grab everything into last token PARSE_NORMAL = PARSE_COLLAPSE | PARSE_TRIM | PARSE_GREEDY, }; typedef struct parser_t { FILE *fp; char *line; char *data; int lineno; } parser_t; parser_t* config_open(const char *filename) FAST_FUNC; parser_t* config_open2(const char *filename, FILE* FAST_FUNC (*fopen_func)(const char *path)) FAST_FUNC; int config_read(parser_t *parser, char **tokens, unsigned flags, const char *delims) FAST_FUNC; #define config_read(parser, tokens, max, min, str, flags) \ config_read(parser, tokens, ((flags) | (((min) & 0xFF) << 8) | ((max) & 0xFF)), str) void config_close(parser_t *parser) FAST_FUNC; /* 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) FAST_FUNC; char *concat_subpath_file(const char *path, const char *filename) FAST_FUNC; const char *bb_basename(const char *name) FAST_FUNC; /* NB: can violate const-ness (similarly to strchr) */ char *last_char_is(const char *s, int c) FAST_FUNC; int bb_make_directory(char *path, long mode, int flags) FAST_FUNC; int get_signum(const char *name) FAST_FUNC; const char *get_signame(int number) FAST_FUNC; void print_signames(void) FAST_FUNC; char *bb_simplify_path(const char *path) FAST_FUNC; #define FAIL_DELAY 3 extern void bb_do_delay(int seconds) FAST_FUNC; extern void change_identity(const struct passwd *pw) FAST_FUNC; extern void run_shell(const char *shell, int loginshell, const char *command, const char **additional_args) NORETURN FAST_FUNC; extern void run_shell(const char *shell, int loginshell, const char *command, const char **additional_args) FAST_FUNC; #if ENABLE_SELINUX extern void renew_current_security_context(void) FAST_FUNC; extern void set_current_security_context(security_context_t sid) FAST_FUNC; extern context_t set_security_context_component(security_context_t cur_context, char *user, char *role, char *type, char *range) FAST_FUNC; extern void setfscreatecon_or_die(security_context_t scontext) FAST_FUNC; extern void selinux_preserve_fcontext(int fdesc) FAST_FUNC; #else #define selinux_preserve_fcontext(fdesc) ((void)0) #endif extern void selinux_or_die(void) FAST_FUNC; extern int restricted_shell(const char *shell) FAST_FUNC; /* setup_environment: * 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 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 clear_env, int change_env, const struct passwd *pw) FAST_FUNC; extern int correct_password(const struct passwd *pw) FAST_FUNC; /* Returns a malloced string */ #if !ENABLE_USE_BB_CRYPT #define pw_encrypt(clear, salt, cleanup) pw_encrypt(clear, salt) #endif extern char *pw_encrypt(const char *clear, const char *salt, int cleanup) FAST_FUNC; extern int obscure(const char *old, const char *newval, const struct passwd *pwdp) FAST_FUNC; /* rnd is additional random input. New one is returned. * Useful if you call crypt_make_salt many times in a row: * rnd = crypt_make_salt(buf1, 4, 0); * rnd = crypt_make_salt(buf2, 4, rnd); * rnd = crypt_make_salt(buf3, 4, rnd); * (otherwise we risk having same salt generated) */ extern int crypt_make_salt(char *p, int cnt, int rnd) FAST_FUNC; /* Returns number of lines changed, or -1 on error */ extern int update_passwd(const char *filename, const char *username, const char *new_pw) FAST_FUNC; int index_in_str_array(const char *const string_array[], const char *key) FAST_FUNC; int index_in_strings(const char *strings, const char *key) FAST_FUNC; int index_in_substr_array(const char *const string_array[], const char *key) FAST_FUNC; int index_in_substrings(const char *strings, const char *key) FAST_FUNC; const char *nth_string(const char *strings, int n) FAST_FUNC; extern void print_login_issue(const char *issue_file, const char *tty) FAST_FUNC; extern void print_login_prompt(void) FAST_FUNC; /* NB: typically you want to pass fd 0, not 1. Think 'applet | grep something' */ int get_terminal_width_height(int fd, unsigned *width, unsigned *height) FAST_FUNC; int tcsetattr_stdin_TCSANOW(const struct termios *tp) FAST_FUNC; /* 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))) FAST_FUNC; int ioctl_or_perror_and_die(int fd, unsigned request, void *argp, const char *fmt,...) __attribute__ ((format (printf, 4, 5))) FAST_FUNC; #if ENABLE_IOCTL_HEX2STR_ERROR int bb_ioctl_or_warn(int fd, unsigned request, void *argp, const char *ioctl_name) FAST_FUNC; int bb_xioctl(int fd, unsigned request, void *argp, const char *ioctl_name) FAST_FUNC; #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, unsigned request, void *argp) FAST_FUNC; int bb_xioctl(int fd, unsigned request, void *argp) FAST_FUNC; #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 char *is_in_ino_dev_hashtable(const struct stat *statbuf) FAST_FUNC; void add_to_ino_dev_hashtable(const struct stat *statbuf, const char *name) FAST_FUNC; void reset_ino_dev_hashtable(void) FAST_FUNC; #ifdef __GLIBC__ /* At least glibc has horrendously large inline for this, so wrap it */ unsigned long long bb_makedev(unsigned int major, unsigned int minor) FAST_FUNC; #undef makedev #define makedev(a,b) bb_makedev(a,b) #endif #if ENABLE_FEATURE_EDITING /* It's NOT just ENABLEd or disabled. It's a number: */ #ifdef CONFIG_FEATURE_EDITING_HISTORY #define MAX_HISTORY (CONFIG_FEATURE_EDITING_HISTORY + 0) #else #define MAX_HISTORY 0 #endif typedef struct line_input_t { int flags; const char *path_lookup; #if MAX_HISTORY int cnt_history; int cur_history; USE_FEATURE_EDITING_SAVEHISTORY(const char *hist_file;) char *history[MAX_HISTORY + 1]; #endif } line_input_t; enum { DO_HISTORY = 1 * (MAX_HISTORY > 0), SAVE_HISTORY = 2 * (MAX_HISTORY > 0) * ENABLE_FEATURE_EDITING_SAVEHISTORY, TAB_COMPLETION = 4 * ENABLE_FEATURE_TAB_COMPLETION, USERNAME_COMPLETION = 8 * ENABLE_FEATURE_USERNAME_COMPLETION, VI_MODE = 0x10 * ENABLE_FEATURE_EDITING_VI, WITH_PATH_LOOKUP = 0x20, FOR_SHELL = DO_HISTORY | SAVE_HISTORY | TAB_COMPLETION | USERNAME_COMPLETION, }; line_input_t *new_line_input_t(int flags) FAST_FUNC; /* Returns: * -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' */ int read_line_input(const char* prompt, char* command, int maxsize, line_input_t *state) FAST_FUNC; #else int read_line_input(const char* prompt, char* command, int maxsize) FAST_FUNC; #define read_line_input(prompt, command, maxsize, state) \ read_line_input(prompt, command, maxsize) #endif #ifndef COMM_LEN #ifdef TASK_COMM_LEN enum { COMM_LEN = TASK_COMM_LEN }; #else /* synchronize with sizeof(task_struct.comm) in /usr/include/linux/sched.h */ enum { COMM_LEN = 16 }; #endif #endif typedef struct procps_status_t { DIR *dir; uint8_t shift_pages_to_bytes; uint8_t shift_pages_to_kb; /* Fields are set to 0/NULL if failed to determine (or not requested) */ uint16_t argv_len; char *argv0; USE_SELINUX(char *context;) /* Everything below must contain no ptrs to malloc'ed data: * 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; unsigned sid; unsigned uid; unsigned gid; unsigned tty_major,tty_minor; #if ENABLE_FEATURE_TOPMEM unsigned long mapped_rw; unsigned long mapped_ro; unsigned long shared_clean; unsigned long shared_dirty; unsigned long private_clean; unsigned long private_dirty; unsigned long stack; #endif char state[4]; /* basename of executable in exec(2), read from /proc/N/stat * (if executable is symlink or script, it is NOT replaced * by link target or interpreter name) */ char comm[COMM_LEN]; /* user/group? - use passwd/group parsing functions */ #if ENABLE_FEATURE_TOP_SMP_PROCESS int last_seen_on_cpu; #endif } procps_status_t; enum { PSSCAN_PID = 1 << 0, PSSCAN_PPID = 1 << 1, PSSCAN_PGID = 1 << 2, PSSCAN_SID = 1 << 3, PSSCAN_UIDGID = 1 << 4, PSSCAN_COMM = 1 << 5, /* PSSCAN_CMD = 1 << 6, - use read_cmdline instead */ PSSCAN_ARGV0 = 1 << 7, /* PSSCAN_EXE = 1 << 8, - not implemented */ PSSCAN_STATE = 1 << 9, PSSCAN_VSZ = 1 << 10, PSSCAN_RSS = 1 << 11, PSSCAN_STIME = 1 << 12, PSSCAN_UTIME = 1 << 13, PSSCAN_TTY = 1 << 14, PSSCAN_SMAPS = (1 << 15) * ENABLE_FEATURE_TOPMEM, /* NB: used by find_pid_by_name(). Any applet using it * needs to be mentioned here. */ PSSCAN_ARGVN = (1 << 16) * (ENABLE_KILLALL || ENABLE_PGREP || ENABLE_PKILL || ENABLE_PIDOF || ENABLE_SESTATUS ), USE_SELINUX(PSSCAN_CONTEXT = 1 << 17,) PSSCAN_START_TIME = 1 << 18, PSSCAN_CPU = 1 << 19, /* 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_START_TIME /**/ | PSSCAN_TTY #if ENABLE_FEATURE_TOP_SMP_PROCESS /**/ | PSSCAN_CPU #endif }; //procps_status_t* alloc_procps_scan(void) FAST_FUNC; void free_procps_scan(procps_status_t* sp) FAST_FUNC; procps_status_t* procps_scan(procps_status_t* sp, int flags) FAST_FUNC; /* Format cmdline (up to col chars) into char buf[col+1] */ /* Puts [comm] if cmdline is empty (-> process is a kernel thread) */ void read_cmdline(char *buf, int col, unsigned pid, const char *comm) FAST_FUNC; pid_t *find_pid_by_name(const char* procName) FAST_FUNC; pid_t *pidlist_reverse(pid_t *pidList) FAST_FUNC; extern const char bb_uuenc_tbl_base64[]; extern const char bb_uuenc_tbl_std[]; void bb_uuencode(char *store, const void *s, int length, const char *tbl) FAST_FUNC; typedef struct sha1_ctx_t { uint32_t count[2]; uint32_t hash[5]; uint32_t wbuf[16]; } sha1_ctx_t; void sha1_begin(sha1_ctx_t *ctx) FAST_FUNC; void sha1_hash(const void *data, size_t length, sha1_ctx_t *ctx) FAST_FUNC; void *sha1_end(void *resbuf, sha1_ctx_t *ctx) FAST_FUNC; typedef struct md5_ctx_t { uint32_t A; uint32_t B; uint32_t C; uint32_t D; uint64_t total; uint32_t buflen; char buffer[128]; } md5_ctx_t; void md5_begin(md5_ctx_t *ctx) FAST_FUNC; void md5_hash(const void *data, size_t length, md5_ctx_t *ctx) FAST_FUNC; void *md5_end(void *resbuf, md5_ctx_t *ctx) FAST_FUNC; uint32_t *crc32_filltable(uint32_t *tbl256, int endian) FAST_FUNC; typedef struct masks_labels_t { const char *labels; const int masks[]; } masks_labels_t; int print_flags_separated(const int *masks, const char *labels, int flags, const char *separator) FAST_FUNC; int print_flags(const masks_labels_t *ml, int flags) FAST_FUNC; extern const char *applet_name; /* "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[]; extern const char bb_msg_read_error[]; extern const char bb_msg_write_error[]; extern const char bb_msg_unknown[]; extern const char bb_msg_can_not_create_raw_socket[]; extern const char bb_msg_perm_denied_are_you_root[]; extern const char bb_msg_requires_arg[]; extern const char bb_msg_invalid_arg[]; extern const char bb_msg_standard_input[]; extern const char bb_msg_standard_output[]; extern const char bb_str_default[]; /* NB: (bb_hexdigits_upcase[i] | 0x20) -> lowercase hex digit */ extern const char bb_hexdigits_upcase[]; extern const char bb_path_mtab_file[]; extern const char bb_path_passwd_file[]; extern const char bb_path_shadow_file[]; extern const char bb_path_gshadow_file[]; extern const char bb_path_group_file[]; extern const char bb_path_motd_file[]; extern const char bb_path_wtmp_file[]; extern const char bb_dev_null[]; extern const char bb_busybox_exec_path[]; /* util-linux manpage says /sbin:/bin:/usr/sbin:/usr/bin, * but I want to save a few bytes here */ extern const char bb_PATH_root_path[]; /* "PATH=/sbin:/usr/sbin:/bin:/usr/bin" */ #define bb_default_root_path (bb_PATH_root_path + sizeof("PATH")) #define bb_default_path (bb_PATH_root_path + sizeof("PATH=/sbin:/usr/sbin")) extern const int const_int_0; extern const int const_int_1; #ifndef BUFSIZ #define BUFSIZ 4096 #endif /* Providing hard guarantee on minimum size (think of BUFSIZ == 128) */ enum { COMMON_BUFSIZE = (BUFSIZ >= 256*sizeof(void*) ? BUFSIZ+1 : 256*sizeof(void*)) }; extern char bb_common_bufsiz1[COMMON_BUFSIZE]; /* This struct is deliberately not defined. */ /* See docs/keep_data_small.txt */ 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 SET_PTR_TO_GLOBALS(x) */ extern struct globals *const 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. * If you change LIBBB_DEFAULT_LOGIN_SHELL, * don't forget to change increment constant. */ #define LIBBB_DEFAULT_LOGIN_SHELL "-/bin/sh" extern const char bb_default_login_shell[]; /* "/bin/sh" */ #define DEFAULT_SHELL (bb_default_login_shell+1) /* "sh" */ #define DEFAULT_SHELL_SHORT_NAME (bb_default_login_shell+6) #if ENABLE_FEATURE_DEVFS # define CURRENT_VC "/dev/vc/0" # define VC_1 "/dev/vc/1" # define VC_2 "/dev/vc/2" # define VC_3 "/dev/vc/3" # define VC_4 "/dev/vc/4" # define VC_5 "/dev/vc/5" #if defined(__sh__) || defined(__H8300H__) || defined(__H8300S__) /* Yes, this sucks, but both SH (including sh64) and H8 have a SCI(F) for their respective serial ports .. as such, we can't use the common device paths for these. -- PFM */ # define SC_0 "/dev/ttsc/0" # define SC_1 "/dev/ttsc/1" # define SC_FORMAT "/dev/ttsc/%d" #else # define SC_0 "/dev/tts/0" # define SC_1 "/dev/tts/1" # define SC_FORMAT "/dev/tts/%d" #endif # define VC_FORMAT "/dev/vc/%d" # define LOOP_FORMAT "/dev/loop/%d" # define LOOP_NAMESIZE (sizeof("/dev/loop/") + sizeof(int)*3 + 1) # define LOOP_NAME "/dev/loop/" # define FB_0 "/dev/fb/0" #else # define CURRENT_VC "/dev/tty0" # define VC_1 "/dev/tty1" # define VC_2 "/dev/tty2" # define VC_3 "/dev/tty3" # define VC_4 "/dev/tty4" # define VC_5 "/dev/tty5" #if defined(__sh__) || defined(__H8300H__) || defined(__H8300S__) # define SC_0 "/dev/ttySC0" # define SC_1 "/dev/ttySC1" # define SC_FORMAT "/dev/ttySC%d" #else # define SC_0 "/dev/ttyS0" # define SC_1 "/dev/ttyS1" # define SC_FORMAT "/dev/ttyS%d" #endif # define VC_FORMAT "/dev/tty%d" # define LOOP_FORMAT "/dev/loop%d" # define LOOP_NAMESIZE (sizeof("/dev/loop") + sizeof(int)*3 + 1) # define LOOP_NAME "/dev/loop" # define FB_0 "/dev/fb0" #endif /* The following devices are the same on devfs and non-devfs systems. */ #define CURRENT_TTY "/dev/tty" #define DEV_CONSOLE "/dev/console" #ifndef RB_POWER_OFF /* Stop system and switch power off if possible. */ #define RB_POWER_OFF 0x4321fedc #endif /* Make sure we call functions instead of macros. */ #undef isalnum #undef isalpha #undef isascii #undef isblank #undef iscntrl #undef isgraph #undef islower #undef isprint #undef ispunct #undef isspace #undef isupper #undef isxdigit /* This one is more efficient - we save ~400 bytes */ #undef isdigit #define isdigit(a) ((unsigned)((a) - '0') <= 9) #define ARRAY_SIZE(x) ((unsigned)(sizeof(x) / sizeof((x)[0]))) #if __GNUC_PREREQ(4,1) # pragma GCC visibility pop #endif #endif /* __LIBBUSYBOX_H__ */