#include <errno.h>
#include <fcntl.h>
#include <inttypes.h>
-#include <mntent.h>
#include <netdb.h>
#include <setjmp.h>
#include <signal.h>
#include <stdarg.h>
#include <stddef.h>
#include <string.h>
-#include <strings.h>
+#include <sys/poll.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <sys/socket.h>
#include <sys/stat.h>
-#include <sys/statfs.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <time.h>
#include <unistd.h>
#include <utime.h>
+/* Try to pull in PATH_MAX */
+#include <limits.h>
+#include <sys/param.h>
+#ifndef PATH_MAX
+#define PATH_MAX 256
+#endif
+
+#ifdef HAVE_MNTENT_H
+#include <mntent.h>
+#endif
+
+#ifdef HAVE_SYS_STATFS_H
+#include <sys/statfs.h>
+#endif
#if ENABLE_SELINUX
#include <selinux/selinux.h>
#include <selinux/context.h>
+#include <selinux/flask.h>
+#include <selinux/av_permissions.h>
#endif
#if ENABLE_LOCALE_SUPPORT
#include "shadow_.h"
#endif
-/* Try to pull in PATH_MAX */
-#include <limits.h>
-#include <sys/param.h>
-#ifndef PATH_MAX
-#define PATH_MAX 256
+/* Some libc's don't declare it, 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 <libgen.h> 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);
+
-/* Tested to work correctly (IIRC :]) */
+/* Tested to work correctly with all int types (IIRC :]) */
#define MAXINT(T) (T)( \
((T)-1) > 0 \
? (T)-1 \
)
/* 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"
#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 :) */
#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 <libgen.h> 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);
extern void chomp(char *s);
extern void trim(char *s);
extern int remove_file(const char *path, int flags);
extern int copy_file(const char *source, const char *dest, int flags);
enum {
- ACTION_RECURSE = (1 << 0),
- ACTION_FOLLOWLINKS = (1 << 1),
- ACTION_DEPTHFIRST = (1 << 2),
- /*ACTION_REVERSE = (1 << 3), - unused */
+ ACTION_RECURSE = (1 << 0),
+ ACTION_FOLLOWLINKS = (1 << 1),
+ ACTION_FOLLOWLINKS_L0 = (1 << 2),
+ ACTION_DEPTHFIRST = (1 << 3),
+ /*ACTION_REVERSE = (1 << 4), - unused */
};
extern int recursive_action(const char *fileName, unsigned flags,
int (*fileAction) (const char *fileName, struct stat* statbuf, void* userData, int depth),
int (*dirAction) (const char *fileName, struct stat* statbuf, void* userData, int depth),
- void* userData, const unsigned depth);
+ void* userData, unsigned depth);
extern int device_open(const char *device, int mode);
+extern int getpty(char *line, int size);
extern int get_console_fd(void);
extern char *find_block_device(const char *path);
/* bb_copyfd_XX print read/write errors and return -1 if they occur */
/* this helper yells "short read!" if param is not -1 */
extern void complain_copyfd_and_die(off_t sz) ATTRIBUTE_NORETURN;
extern char bb_process_escape_sequence(const char **ptr);
-/* TODO: sometimes modifies its parameter, which
- * makes it rather inconvenient at times: */
-extern char *bb_get_last_path_component(char *path);
+/* 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);
+/* "abc/def/" -> "" and it never modifies 'path' */
+extern char *bb_get_last_path_component_nostrip(const char *path);
int ndelay_on(int fd);
int ndelay_off(int fd);
+int close_on_exec_on(int fd);
+void xdup2(int, int);
void xmove_fd(int, int);
DIR *xopendir(const char *path);
DIR *warn_opendir(const char *path);
-char *xrealloc_getcwd_or_warn(char *cwd);
+/* UNUSED: char *xmalloc_realpath(const char *path); */
+char *xmalloc_readlink(const char *path);
char *xmalloc_readlink_or_warn(const char *path);
-char *xmalloc_realpath(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_SIGS_FATAL, 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
+ */
+ BB_SIGS_FATAL = 0
+ + (1 << SIGHUP)
+ + (1 << SIGINT)
+ + (1 << SIGTERM)
+ + (1 << SIGPIPE) // Write to pipe with no readers
+ + (1 << SIGQUIT) // Quit from keyboard
+ + (1 << SIGABRT) // Abort signal from abort(3)
+ + (1 << SIGALRM) // Timer signal from alarm(2)
+ + (1 << SIGVTALRM) // Virtual alarm clock
+ + (1 << SIGXCPU) // CPU time limit exceeded
+ + (1 << SIGXFSZ) // File size limit exceeded
+ + (1 << SIGUSR1) // Yes kids, these are also fatal!
+ + (1 << 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);
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]);
+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);
void xconnect(int s, const struct sockaddr *s_addr, socklen_t addrlen);
-ssize_t xsendto(int s, const void *buf, size_t len, const struct sockaddr *to,
+ssize_t xsendto(int s, const void *buf, size_t len, const struct sockaddr *to,
socklen_t tolen);
-int setsockopt_reuseaddr(int fd);
+/* 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); /* On Linux this never fails. */
int setsockopt_broadcast(int fd);
/* NB: returns port in host byte order */
unsigned bb_lookup_port(const char *port, const char *protocol, unsigned default_port);
#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;
};
/* 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, and
- * if kernel doesn't support it, IPv4.
+ * 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,
* 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);
int create_and_bind_dgram_or_die(const char *bindaddr, int port);
/* Create client TCP socket connected to peer:port. Peer cannot be NULL.
/* 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 of corresponding type,
+/* 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);
/* Retrieve sin[6]_port or return -1 for non-INET[6] lsa's */
int get_nport(const struct sockaddr *sa);
/* Reverse DNS. Returns NULL on failure. */
-char* xmalloc_sockaddr2host(const struct sockaddr *sa, socklen_t salen);
+char* xmalloc_sockaddr2host(const struct sockaddr *sa);
/* This one doesn't append :PORTNUM */
-char* xmalloc_sockaddr2host_noport(const struct sockaddr *sa, socklen_t salen);
+char* xmalloc_sockaddr2host_noport(const struct sockaddr *sa);
/* This one also doesn't fall back to dotted IP (returns NULL) */
-char* xmalloc_sockaddr2hostonly_noport(const struct sockaddr *sa, socklen_t salen);
+char* xmalloc_sockaddr2hostonly_noport(const struct sockaddr *sa);
/* inet_[ap]ton on steroids */
-char* xmalloc_sockaddr2dotted(const struct sockaddr *sa, socklen_t salen);
-char* xmalloc_sockaddr2dotted_noport(const struct sockaddr *sa, socklen_t salen);
+char* xmalloc_sockaddr2dotted(const struct sockaddr *sa);
+char* xmalloc_sockaddr2dotted_noport(const struct sockaddr *sa);
// "old" (ipv4 only) API
// users: traceroute.c hostname.c - use _list_ of all IPs
struct hostent *xgethostbyname(const char *name);
struct sockaddr *from, struct sockaddr *to,
socklen_t sa_size);
-
-extern char *xstrdup(const char *s);
-extern char *xstrndup(const char *s, int n);
-extern char *safe_strncpy(char *dst, const char *src, size_t size);
-extern char *xasprintf(const char *format, ...) __attribute__ ((format (printf, 1, 2)));
+char *xstrdup(const char *s);
+char *xstrndup(const char *s, int n);
+char *safe_strncpy(char *dst, const char *src, size_t size);
+/* 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);
+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
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);
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.
+// Bytes are appended to pfx (which must be malloced, or NULL).
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);
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);
/* 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 *bb_get_chunk_from_file(FILE *file, int *end);
/* "Opens" stdin if filename is special, else just opens file: */
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 */
-extern char* str_tolower(char *str);
+char* str_tolower(char *str);
char *utoa(unsigned n);
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);
/* Put a string of hex bytes ("1b2e66fe"...), return advanced pointer */
char *bin2hex(char *buf, const char *cp, int count);
+/* Last element is marked by mult == 0 */
struct suffix_mult {
- const char *suffix;
+ char suffix[4];
unsigned mult;
};
#include "xatonum.h"
int get_uidgid(struct bb_uidgid_t*, const char*, int numeric_ok);
/* chown-like handling of "user[:[group]" */
void parse_chown_usergroup_or_die(struct bb_uidgid_t *u, char *user_group);
-/* what is this? */
-/*extern char *bb_getug(char *buffer, char *idname, long id, int bufsize, char prefix);*/
-char *bb_getpwuid(char *name, long uid, int bufsize);
-char *bb_getgrgid(char *group, long gid, int bufsize);
+/* 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);
+char *bb_getgrgid(char *group, int bufsize, long gid);
/* versions which cache results (useful for ps, ls etc) */
const char* get_cached_username(uid_t uid);
const char* get_cached_groupname(gid_t gid);
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);
+/* 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[]);
#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)
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));
* 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)
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;
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.
*
*/
enum {
DAEMON_CHDIR_ROOT = 1,
- DAEMON_DEVNULL_STDIO = /* 2 */ 0, /* no users so far */
+ DAEMON_DEVNULL_STDIO = 2,
DAEMON_CLOSE_EXTRA_FDS = 4,
DAEMON_ONLY_SANITIZE = 8, /* internal use */
};
#if BB_MMU
void forkexit_or_rexec(void);
+ 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) 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);
-// TODO: always error out?
-enum { BB_GETOPT_ERROR = 0x80000000 };
extern const char *opt_complementary;
#if ENABLE_GETOPT_LONG
-extern const struct option *applet_long_options;
+#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(int argc, char **argv, const char *applet_opts, ...);
+extern uint32_t getopt32(char **argv, const char *applet_opts, ...);
typedef struct llist_t {
* llist_t *llist_add_to(llist_t *old_head, void *data)
* etc does not result in smaller code... */
-
-#if ENABLE_FEATURE_PIDFILE
-int write_pidfile(const char *path);
-#define remove_pidfile(f) ((void)unlink(f))
+/* 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);
+#define remove_pidfile(path) do { if (wrote_pidfile) unlink(path); } while (0)
#else
-/* Why? #defining it to 1 gives "warning: statement with no effect"... */
-static ALWAYS_INLINE int write_pidfile(const char *path) { return 1; }
-#define remove_pidfile(f) ((void)0)
+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,
+ LOGMODE_STDIO = (1 << 0),
+ LOGMODE_SYSLOG = (1 << 1) * ENABLE_FEATURE_SYSLOG,
LOGMODE_BOTH = LOGMODE_SYSLOG + LOGMODE_STDIO,
};
extern const char *msg_eol;
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)));
+extern void bb_simple_perror_msg(const char *s);
extern void bb_perror_msg_and_die(const char *s, ...) __attribute__ ((noreturn, format (printf, 1, 2)));
-extern void bb_vherror_msg(const char *s, va_list p);
+extern void bb_simple_perror_msg_and_die(const char *s) __attribute__ ((noreturn));
extern void bb_herror_msg(const char *s, ...) __attribute__ ((format (printf, 1, 2)));
extern void bb_herror_msg_and_die(const char *s, ...) __attribute__ ((noreturn, format (printf, 1, 2)));
extern void bb_perror_nomsg_and_die(void) ATTRIBUTE_NORETURN;
extern void bb_perror_nomsg(void);
extern void bb_info_msg(const char *s, ...) __attribute__ ((format (printf, 1, 2)));
-/* These are used internally -- you shouldn't need to use them */
extern void bb_verror_msg(const char *s, va_list p, const char *strerr);
-extern void bb_vperror_msg(const char *s, va_list p);
-extern void bb_vinfo_msg(const char *s, va_list p);
+
+/* 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 bb_test(int argc, char** argv);
-int kill_main(int argc, char **argv);
+int echo_main(int argc, char** argv) MAIN_EXTERNALLY_VISIBLE;
+int test_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int kill_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
#if ENABLE_ROUTE
void bb_displayroutes(int noresolve, int netstatfmt);
#endif
-int chown_main(int argc, char **argv);
+int chown_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
#if ENABLE_GUNZIP
-int gunzip_main(int argc, char **argv);
+int gunzip_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+#endif
+#if ENABLE_BUNZIP2
+int bunzip2_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
#endif
int bbunpack(char **argv,
char* (*make_new_name)(char *filename),
int (*activate) (int fd);
int suppress_null_addr;
};
-extern int interface_opt_a;
+extern smallint interface_opt_a;
int display_interfaces(char *ifname);
const struct aftype *get_aftype(const char *name);
const struct hwtype *get_hwtype(const char *name);
#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);
extern char *query_loop(const char *device);
extern int del_loop(const char *device);
-extern int set_loop(char **device, const char *file, unsigned long long offset);
+/* 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);
//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);
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);
/* NB: can violate const-ness (similarly to strchr) */
char *last_char_is(const char *s, int c);
int get_signum(const char *name);
const char *get_signame(int number);
+void print_signames(void);
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
extern void renew_current_security_context(void);
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);
-extern void setup_environment(const char *shell, int loginshell, int changeenv, const struct passwd *pw);
+
+/* 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);
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_substr_array(const char * const string_array[], 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);
-extern void crypt_make_salt(char *p, int cnt);
-
-int get_terminal_width_height(const int fd, int *width, int *height);
+/* 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);
+
+/* Returns number of lines changed, or -1 on error */
+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 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)));
+#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);
+#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);
+#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);
void add_to_ino_dev_hashtable(const struct stat *statbuf, const char *name);
FOR_SHELL = DO_HISTORY | SAVE_HISTORY | TAB_COMPLETION | USERNAME_COMPLETION,
};
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 (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);
#else
int read_line_input(const char* prompt, char* command, int maxsize);
enum { COMM_LEN = 16 };
#endif
#endif
-typedef struct {
+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) */
- char *cmd;
+ 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 vsz, rss; /* we round it to kbytes */
+ 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];
- char tty_str[8]; /* "maj,min" or "?" */
- /* basename of executable in exec(2), read from /proc/N/stat, */
- /* size from sizeof(task_struct.comm) in /usr/include/linux/sched.h */
+ /* 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 */
} procps_status_t;
PSSCAN_SID = 1 << 3,
PSSCAN_UIDGID = 1 << 4,
PSSCAN_COMM = 1 << 5,
- PSSCAN_CMD = 1 << 6,
- PSSCAN_STATE = 1 << 7,
- PSSCAN_VSZ = 1 << 8,
- PSSCAN_RSS = 1 << 9,
- PSSCAN_STIME = 1 << 10,
- PSSCAN_UTIME = 1 << 11,
- PSSCAN_TTY = 1 << 12,
- USE_SELINUX(PSSCAN_CONTEXT = 1 << 13,)
+ /* 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,
+ 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] */
+/* Puts [comm] if cmdline is empty (-> process is a kernel thread) */
+void read_cmdline(char *buf, int col, unsigned pid, const char *comm);
pid_t *find_pid_by_name(const char* procName);
pid_t *pidlist_reverse(pid_t *pidList);
extern const char bb_uuenc_tbl_base64[];
extern const char bb_uuenc_tbl_std[];
-void bb_uuencode(const unsigned char *s, char *store, const int length, const char *tbl);
+void bb_uuencode(char *store, const void *s, int length, const char *tbl);
typedef struct sha1_ctx_t {
uint32_t count[2];
};
#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[];
/* 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 PTR_TO_GLOBALS = xxx */
+ * 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;
-#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.
#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
#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
#include <dmalloc.h>
#endif
+#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
+
#endif /* __LIBBUSYBOX_H__ */
projects / oweals / busybox.git / blobdiff