diff options
Diffstat (limited to 'libc/include/unistd.h')
| -rw-r--r-- | libc/include/unistd.h | 208 |
1 files changed, 181 insertions, 27 deletions
diff --git a/libc/include/unistd.h b/libc/include/unistd.h index 1bfdb0e..f0de29e 100644 --- a/libc/include/unistd.h +++ b/libc/include/unistd.h @@ -25,6 +25,7 @@ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ + #ifndef _UNISTD_H_ #define _UNISTD_H_ @@ -33,20 +34,45 @@ #include <sys/types.h> #include <sys/select.h> #include <sys/sysconf.h> -#include <pathconf.h> + +#include <machine/posix_limits.h> __BEGIN_DECLS -/* Standard file descriptor numbers. */ #define STDIN_FILENO 0 #define STDOUT_FILENO 1 #define STDERR_FILENO 2 -/* Values for whence in fseek and lseek */ +#define F_OK 0 +#define X_OK 1 +#define W_OK 2 +#define R_OK 4 + #define SEEK_SET 0 #define SEEK_CUR 1 #define SEEK_END 2 +#define _PC_FILESIZEBITS 0 +#define _PC_LINK_MAX 1 +#define _PC_MAX_CANON 2 +#define _PC_MAX_INPUT 3 +#define _PC_NAME_MAX 4 +#define _PC_PATH_MAX 5 +#define _PC_PIPE_BUF 6 +#define _PC_2_SYMLINKS 7 +#define _PC_ALLOC_SIZE_MIN 8 +#define _PC_REC_INCR_XFER_SIZE 9 +#define _PC_REC_MAX_XFER_SIZE 10 +#define _PC_REC_MIN_XFER_SIZE 11 +#define _PC_REC_XFER_ALIGN 12 +#define _PC_SYMLINK_MAX 13 +#define _PC_CHOWN_RESTRICTED 14 +#define _PC_NO_TRUNC 15 +#define _PC_VDISABLE 16 +#define _PC_ASYNC_IO 17 +#define _PC_PRIO_IO 18 +#define _PC_SYNC_IO 19 + extern char** environ; extern __noreturn void _exit(int); @@ -90,17 +116,9 @@ extern int setresgid(gid_t, gid_t, gid_t); extern int getresuid(uid_t *ruid, uid_t *euid, uid_t *suid); extern int getresgid(gid_t *rgid, gid_t *egid, gid_t *sgid); extern char* getlogin(void); -extern char* getusershell(void); -extern void setusershell(void); -extern void endusershell(void); - - -/* Macros for access() */ -#define R_OK 4 /* Read */ -#define W_OK 2 /* Write */ -#define X_OK 1 /* Execute */ -#define F_OK 0 /* Existence */ +extern long fpathconf(int, int); +extern long pathconf(const char*, int); extern int access(const char*, int); extern int faccessat(int, const char*, int, int); @@ -112,7 +130,7 @@ extern int chdir(const char *); extern int fchdir(int); extern int rmdir(const char *); extern int pipe(int *); -#ifdef _GNU_SOURCE +#if defined(__USE_GNU) extern int pipe2(int *, int); #endif extern int chroot(const char *); @@ -124,34 +142,40 @@ extern int chown(const char *, uid_t, gid_t); extern int fchown(int, uid_t, gid_t); extern int fchownat(int, const char*, uid_t, gid_t, int); extern int lchown(const char *, uid_t, gid_t); -extern int truncate(const char *, off_t); -extern int truncate64(const char *, off64_t); extern char *getcwd(char *, size_t); extern int sync(void); extern int close(int); -extern off_t lseek(int, off_t, int); -extern off64_t lseek64(int, off64_t, int); extern ssize_t read(int, void *, size_t); extern ssize_t write(int, const void *, size_t); -extern ssize_t pread(int, void *, size_t, off_t); -extern ssize_t pread64(int, void *, size_t, off64_t); -extern ssize_t pwrite(int, const void *, size_t, off_t); -extern ssize_t pwrite64(int, const void *, size_t, off64_t); extern int dup(int); extern int dup2(int, int); -#ifdef _GNU_SOURCE extern int dup3(int, int, int); -#endif extern int fcntl(int, int, ...); extern int ioctl(int, int, ...); -extern int flock(int, int); extern int fsync(int); extern int fdatasync(int); + +#if defined(__USE_FILE_OFFSET64) +extern int truncate(const char *, off_t) __RENAME(truncate64); +extern off_t lseek(int, off_t, int) __RENAME(lseek64); +extern ssize_t pread(int, void *, size_t, off_t) __RENAME(pread64); +extern ssize_t pwrite(int, const void *, size_t, off_t) __RENAME(pwrite64); +extern int ftruncate(int, off_t) __RENAME(ftruncate64); +#else +extern int truncate(const char *, off_t); +extern off_t lseek(int, off_t, int); +extern ssize_t pread(int, void *, size_t, off_t); +extern ssize_t pwrite(int, const void *, size_t, off_t); extern int ftruncate(int, off_t); +#endif +extern int truncate64(const char *, off64_t); +extern off64_t lseek64(int, off64_t, int); +extern ssize_t pread64(int, void *, size_t, off64_t); +extern ssize_t pwrite64(int, const void *, size_t, off64_t); extern int ftruncate64(int, off64_t); extern int pause(void); @@ -159,7 +183,8 @@ extern unsigned int alarm(unsigned int); extern unsigned int sleep(unsigned int); extern int usleep(useconds_t); -extern int gethostname(char *, size_t); +int gethostname(char*, size_t); +int sethostname(const char*, size_t); extern void *__brk(void *); extern int brk(void *); @@ -170,7 +195,7 @@ extern char *optarg; extern int optind, opterr, optopt; extern int isatty(int); -extern char* ttyname(int) __warnattr("ttyname is not thread-safe; use ttyname_r instead"); +extern char* ttyname(int); extern int ttyname_r(int, char*, size_t); extern int acct(const char* filepath); @@ -179,6 +204,8 @@ int getpagesize(void); long sysconf(int); +long syscall(long number, ...); + extern int daemon(int, int); #if defined(__arm__) || (defined(__mips__) && !defined(__LP64__)) @@ -197,13 +224,89 @@ extern int tcsetpgrp(int fd, pid_t _pid); } while (_rc == -1 && errno == EINTR); \ _rc; }) +extern ssize_t __pread_chk(int, void*, size_t, off_t, size_t); +__errordecl(__pread_dest_size_error, "pread called with size bigger than destination"); +__errordecl(__pread_count_toobig_error, "pread called with count > SSIZE_MAX"); +extern ssize_t __pread_real(int, void*, size_t, off_t) __RENAME(pread); + +extern ssize_t __pread64_chk(int, void*, size_t, off64_t, size_t); +__errordecl(__pread64_dest_size_error, "pread64 called with size bigger than destination"); +__errordecl(__pread64_count_toobig_error, "pread64 called with count > SSIZE_MAX"); +extern ssize_t __pread64_real(int, void*, size_t, off64_t) __RENAME(pread64); + extern ssize_t __read_chk(int, void*, size_t, size_t); __errordecl(__read_dest_size_error, "read called with size bigger than destination"); __errordecl(__read_count_toobig_error, "read called with count > SSIZE_MAX"); extern ssize_t __read_real(int, void*, size_t) __RENAME(read); +extern ssize_t __readlink_chk(const char*, char*, size_t, size_t); +__errordecl(__readlink_dest_size_error, "readlink called with size bigger than destination"); +__errordecl(__readlink_size_toobig_error, "readlink called with size > SSIZE_MAX"); +extern ssize_t __readlink_real(const char*, char*, size_t) __RENAME(readlink); + +extern ssize_t __readlinkat_chk(int dirfd, const char*, char*, size_t, size_t); +__errordecl(__readlinkat_dest_size_error, "readlinkat called with size bigger than destination"); +__errordecl(__readlinkat_size_toobig_error, "readlinkat called with size > SSIZE_MAX"); +extern ssize_t __readlinkat_real(int dirfd, const char*, char*, size_t) __RENAME(readlinkat); + #if defined(__BIONIC_FORTIFY) +#if defined(__USE_FILE_OFFSET64) +#define __PREAD_PREFIX(x) __pread64_ ## x +#else +#define __PREAD_PREFIX(x) __pread_ ## x +#endif + +__BIONIC_FORTIFY_INLINE +ssize_t pread(int fd, void* buf, size_t count, off_t offset) { + size_t bos = __bos0(buf); + +#if !defined(__clang__) + if (__builtin_constant_p(count) && (count > SSIZE_MAX)) { + __PREAD_PREFIX(count_toobig_error)(); + } + + if (bos == __BIONIC_FORTIFY_UNKNOWN_SIZE) { + return __PREAD_PREFIX(real)(fd, buf, count, offset); + } + + if (__builtin_constant_p(count) && (count > bos)) { + __PREAD_PREFIX(dest_size_error)(); + } + + if (__builtin_constant_p(count) && (count <= bos)) { + return __PREAD_PREFIX(real)(fd, buf, count, offset); + } +#endif + + return __PREAD_PREFIX(chk)(fd, buf, count, offset, bos); +} + +__BIONIC_FORTIFY_INLINE +ssize_t pread64(int fd, void* buf, size_t count, off64_t offset) { + size_t bos = __bos0(buf); + +#if !defined(__clang__) + if (__builtin_constant_p(count) && (count > SSIZE_MAX)) { + __pread64_count_toobig_error(); + } + + if (bos == __BIONIC_FORTIFY_UNKNOWN_SIZE) { + return __pread64_real(fd, buf, count, offset); + } + + if (__builtin_constant_p(count) && (count > bos)) { + __pread64_dest_size_error(); + } + + if (__builtin_constant_p(count) && (count <= bos)) { + return __pread64_real(fd, buf, count, offset); + } +#endif + + return __pread64_chk(fd, buf, count, offset, bos); +} + __BIONIC_FORTIFY_INLINE ssize_t read(int fd, void* buf, size_t count) { size_t bos = __bos0(buf); @@ -228,6 +331,57 @@ ssize_t read(int fd, void* buf, size_t count) { return __read_chk(fd, buf, count, bos); } + +__BIONIC_FORTIFY_INLINE +ssize_t readlink(const char* path, char* buf, size_t size) { + size_t bos = __bos(buf); + +#if !defined(__clang__) + if (__builtin_constant_p(size) && (size > SSIZE_MAX)) { + __readlink_size_toobig_error(); + } + + if (bos == __BIONIC_FORTIFY_UNKNOWN_SIZE) { + return __readlink_real(path, buf, size); + } + + if (__builtin_constant_p(size) && (size > bos)) { + __readlink_dest_size_error(); + } + + if (__builtin_constant_p(size) && (size <= bos)) { + return __readlink_real(path, buf, size); + } +#endif + + return __readlink_chk(path, buf, size, bos); +} + +__BIONIC_FORTIFY_INLINE +ssize_t readlinkat(int dirfd, const char* path, char* buf, size_t size) { + size_t bos = __bos(buf); + +#if !defined(__clang__) + if (__builtin_constant_p(size) && (size > SSIZE_MAX)) { + __readlinkat_size_toobig_error(); + } + + if (bos == __BIONIC_FORTIFY_UNKNOWN_SIZE) { + return __readlinkat_real(dirfd, path, buf, size); + } + + if (__builtin_constant_p(size) && (size > bos)) { + __readlinkat_dest_size_error(); + } + + if (__builtin_constant_p(size) && (size <= bos)) { + return __readlinkat_real(dirfd, path, buf, size); + } +#endif + + return __readlinkat_chk(dirfd, path, buf, size, bos); +} + #endif /* defined(__BIONIC_FORTIFY) */ __END_DECLS |