/
posixunix.scm
2396 lines (2125 loc) · 91.1 KB
/
posixunix.scm
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;;;; posixunix.scm - Miscellaneous file- and process-handling routines
;
; Copyright (c) 2000-2007, Felix L. Winkelmann
; Copyright (c) 2008-2009, The Chicken Team
; All rights reserved.
;
; Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following
; conditions are met:
;
; Redistributions of source code must retain the above copyright notice, this list of conditions and the following
; disclaimer.
; Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following
; disclaimer in the documentation and/or other materials provided with the distribution.
; Neither the name of the author nor the names of its contributors may be used to endorse or promote
; products derived from this software without specific prior written permission.
;
; THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS
; OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
; AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR
; CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
; CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
; SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
; THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
; OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
; POSSIBILITY OF SUCH DAMAGE.
(declare
(unit posix)
(uses scheduler regex extras utils files ports)
(disable-interrupts)
(usual-integrations)
(hide ##sys#stat group-member _get-groups _ensure-groups posix-error
##sys#terminal-check
check-time-vector)
(foreign-declare #<<EOF
#include <signal.h>
#include <errno.h>
#include <math.h>
static int C_not_implemented(void);
int C_not_implemented() { return -1; }
static C_TLS int C_wait_status;
#include <unistd.h>
#include <sys/types.h>
#include <sys/time.h>
#include <sys/wait.h>
#include <sys/utsname.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <fcntl.h>
#include <dirent.h>
#include <pwd.h>
#if defined(__sun__) && defined(__svr4__)
# include <sys/tty.h>
#endif
#ifdef HAVE_GRP_H
#include <grp.h>
#endif
#include <sys/mman.h>
#include <time.h>
#ifndef O_FSYNC
# define O_FSYNC O_SYNC
#endif
#ifndef PIPE_BUF
# ifdef __CYGWIN__
# define PIPE_BUF _POSIX_PIPE_BUF
# else
# define PIPE_BUF 1024
# endif
#endif
#ifndef O_BINARY
# define O_BINARY 0
#endif
#ifndef O_TEXT
# define O_TEXT 0
#endif
#ifndef ARG_MAX
# define ARG_MAX 256
#endif
#ifndef MAP_FILE
# define MAP_FILE 0
#endif
#ifndef MAP_ANON
# define MAP_ANON 0
#endif
#if defined(HAVE_CRT_EXTERNS_H)
# include <crt_externs.h>
# define C_getenventry(i) ((*_NSGetEnviron())[ i ])
#elif defined(C_MACOSX)
# define C_getenventry(i) NULL
#else
extern char **environ;
# define C_getenventry(i) (environ[ i ])
#endif
#ifndef ENV_MAX
# define ENV_MAX 1024
#endif
static C_TLS char *C_exec_args[ ARG_MAX ];
static C_TLS char *C_exec_env[ ENV_MAX ];
static C_TLS struct utsname C_utsname;
static C_TLS struct flock C_flock;
static C_TLS DIR *temphandle;
static C_TLS struct passwd *C_user;
#ifdef HAVE_GRP_H
static C_TLS struct group *C_group;
#else
static C_TLS struct {
char *gr_name, gr_passwd;
int gr_gid;
char *gr_mem[ 1 ];
} C_group = { "", "", 0, { "" } };
#endif
static C_TLS int C_pipefds[ 2 ];
static C_TLS time_t C_secs;
static C_TLS struct tm C_tm;
static C_TLS fd_set C_fd_sets[ 2 ];
static C_TLS struct timeval C_timeval;
static C_TLS char C_hostbuf[ 256 ];
static C_TLS struct stat C_statbuf;
#define C_mkdir(str) C_fix(mkdir(C_c_string(str), S_IRWXU | S_IRWXG | S_IRWXO))
#define C_chdir(str) C_fix(chdir(C_c_string(str)))
#define C_rmdir(str) C_fix(rmdir(C_c_string(str)))
#define C_opendir(x,h) C_set_block_item(h, 0, (C_word) opendir(C_c_string(x)))
#define C_closedir(h) (closedir((DIR *)C_block_item(h, 0)), C_SCHEME_UNDEFINED)
#define C_readdir(h,e) C_set_block_item(e, 0, (C_word) readdir((DIR *)C_block_item(h, 0)))
#define C_foundfile(e,b) (strcpy(C_c_string(b), ((struct dirent *) C_block_item(e, 0))->d_name), C_fix(strlen(((struct dirent *) C_block_item(e, 0))->d_name)))
#define C_curdir(buf) (getcwd(C_c_string(buf), 256) ? C_fix(strlen(C_c_string(buf))) : C_SCHEME_FALSE)
#define open_binary_input_pipe(a, n, name) C_mpointer(a, popen(C_c_string(name), "r"))
#define open_text_input_pipe(a, n, name) open_binary_input_pipe(a, n, name)
#define open_binary_output_pipe(a, n, name) C_mpointer(a, popen(C_c_string(name), "w"))
#define open_text_output_pipe(a, n, name) open_binary_output_pipe(a, n, name)
#define close_pipe(p) C_fix(pclose(C_port_file(p)))
#define C_set_file_ptr(port, ptr) (C_set_block_item(port, 0, (C_block_item(ptr, 0))), C_SCHEME_UNDEFINED)
#define C_fork fork
#define C_waitpid(id, o) C_fix(waitpid(C_unfix(id), &C_wait_status, C_unfix(o)))
#define C_getpid getpid
#define C_getppid getppid
#define C_kill(id, s) C_fix(kill(C_unfix(id), C_unfix(s)))
#define C_getuid getuid
#define C_getgid getgid
#define C_geteuid geteuid
#define C_getegid getegid
#define C_chown(fn, u, g) C_fix(chown(C_data_pointer(fn), C_unfix(u), C_unfix(g)))
#define C_chmod(fn, m) C_fix(chmod(C_data_pointer(fn), C_unfix(m)))
#define C_setuid(id) C_fix(setuid(C_unfix(id)))
#define C_setgid(id) C_fix(setgid(C_unfix(id)))
#define C_seteuid(id) C_fix(seteuid(C_unfix(id)))
#define C_setegid(id) C_fix(setegid(C_unfix(id)))
#define C_setsid(dummy) C_fix(setsid())
#define C_setpgid(x, y) C_fix(setpgid(C_unfix(x), C_unfix(y)))
#define C_getpgid(x) C_fix(getpgid(C_unfix(x)))
#define C_symlink(o, n) C_fix(symlink(C_data_pointer(o), C_data_pointer(n)))
#define C_readlink(f, b) C_fix(readlink(C_data_pointer(f), C_data_pointer(b), FILENAME_MAX))
#define C_getpwnam(n) C_mk_bool((C_user = getpwnam((char *)C_data_pointer(n))) != NULL)
#define C_getpwuid(u) C_mk_bool((C_user = getpwuid(C_unfix(u))) != NULL)
#ifdef HAVE_GRP_H
#define C_getgrnam(n) C_mk_bool((C_group = getgrnam((char *)C_data_pointer(n))) != NULL)
#define C_getgrgid(u) C_mk_bool((C_group = getgrgid(C_unfix(u))) != NULL)
#else
#define C_getgrnam(n) C_SCHEME_FALSE
#define C_getgrgid(n) C_SCHEME_FALSE
#endif
#define C_pipe(d) C_fix(pipe(C_pipefds))
#define C_truncate(f, n) C_fix(truncate((char *)C_data_pointer(f), C_num_to_int(n)))
#define C_ftruncate(f, n) C_fix(ftruncate(C_unfix(f), C_num_to_int(n)))
#define C_uname C_fix(uname(&C_utsname))
#define C_fdopen(a, n, fd, m) C_mpointer(a, fdopen(C_unfix(fd), C_c_string(m)))
#define C_C_fileno(p) C_fix(fileno(C_port_file(p)))
#define C_dup(x) C_fix(dup(C_unfix(x)))
#define C_dup2(x, y) C_fix(dup2(C_unfix(x), C_unfix(y)))
#define C_alarm alarm
#define C_setvbuf(p, m, s) C_fix(setvbuf(C_port_file(p), NULL, C_unfix(m), C_unfix(s)))
#define C_access(fn, m) C_fix(access((char *)C_data_pointer(fn), C_unfix(m)))
#define C_close(fd) C_fix(close(C_unfix(fd)))
#define C_sleep sleep
#define C_stat(fn) C_fix(stat((char *)C_data_pointer(fn), &C_statbuf))
#define C_lstat(fn) C_fix(lstat((char *)C_data_pointer(fn), &C_statbuf))
#define C_fstat(f) C_fix(fstat(C_unfix(f), &C_statbuf))
#define C_islink ((C_statbuf.st_mode & S_IFMT) == S_IFLNK)
#define C_isreg ((C_statbuf.st_mode & S_IFMT) == S_IFREG)
#define C_isdir ((C_statbuf.st_mode & S_IFMT) == S_IFDIR)
#define C_ischr ((C_statbuf.st_mode & S_IFMT) == S_IFCHR)
#define C_isblk ((C_statbuf.st_mode & S_IFMT) == S_IFBLK)
#define C_isfifo ((C_statbuf.st_mode & S_IFMT) == S_IFIFO)
#ifdef S_IFSOCK
#define C_issock ((C_statbuf.st_mode & S_IFMT) == S_IFSOCK)
#else
#define C_issock ((C_statbuf.st_mode & S_IFMT) == 0140000)
#endif
#ifdef C_GNU_ENV
# define C_unsetenv(s) (unsetenv((char *)C_data_pointer(s)), C_SCHEME_TRUE)
# define C_setenv(x, y) C_fix(setenv((char *)C_data_pointer(x), (char *)C_data_pointer(y), 1))
#else
# define C_unsetenv(s) C_fix(putenv((char *)C_data_pointer(s)))
static C_word C_fcall C_setenv(C_word x, C_word y) {
char *sx = C_data_pointer(x),
*sy = C_data_pointer(y);
int n1 = C_strlen(sx), n2 = C_strlen(sy);
char *buf = (char *)C_malloc(n1 + n2 + 2);
if(buf == NULL) return(C_fix(0));
else {
C_strcpy(buf, sx);
buf[ n1 ] = '=';
C_strcpy(buf + n1 + 1, sy);
return(C_fix(putenv(buf)));
}
}
#endif
static void C_fcall C_set_arg_string(char **where, int i, char *a, int len) {
char *ptr;
if(a != NULL) {
ptr = (char *)C_malloc(len + 1);
C_memcpy(ptr, a, len);
ptr[ len ] = '\0';
}
else ptr = NULL;
where[ i ] = ptr;
}
static void C_fcall C_free_arg_string(char **where) {
while((*where) != NULL) C_free(*(where++));
}
static void C_set_timeval(C_word num, struct timeval *tm)
{
if((num & C_FIXNUM_BIT) != 0) {
tm->tv_sec = C_unfix(num);
tm->tv_usec = 0;
}
else {
double i;
tm->tv_usec = (int)(modf(C_flonum_magnitude(num), &i) * 1000000);
tm->tv_sec = (int)i;
}
}
#define C_set_exec_arg(i, a, len) C_set_arg_string(C_exec_args, i, a, len)
#define C_free_exec_args() C_free_arg_string(C_exec_args)
#define C_set_exec_env(i, a, len) C_set_arg_string(C_exec_env, i, a, len)
#define C_free_exec_env() C_free_arg_string(C_exec_env)
#define C_execvp(f) C_fix(execvp(C_data_pointer(f), C_exec_args))
#define C_execve(f) C_fix(execve(C_data_pointer(f), C_exec_args, C_exec_env))
#if defined(__FreeBSD__) || defined(C_MACOSX) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__sgi__) || defined(sgi) || defined(__DragonFly__) || defined(__SUNPRO_C)
static C_TLS int C_uw;
# define C_WIFEXITED(n) (C_uw = C_unfix(n), C_mk_bool(WIFEXITED(C_uw)))
# define C_WIFSIGNALED(n) (C_uw = C_unfix(n), C_mk_bool(WIFSIGNALED(C_uw)))
# define C_WIFSTOPPED(n) (C_uw = C_unfix(n), C_mk_bool(WIFSTOPPED(C_uw)))
# define C_WEXITSTATUS(n) (C_uw = C_unfix(n), C_fix(WEXITSTATUS(C_uw)))
# define C_WTERMSIG(n) (C_uw = C_unfix(n), C_fix(WTERMSIG(C_uw)))
# define C_WSTOPSIG(n) (C_uw = C_unfix(n), C_fix(WSTOPSIG(C_uw)))
#else
# define C_WIFEXITED(n) C_mk_bool(WIFEXITED(C_unfix(n)))
# define C_WIFSIGNALED(n) C_mk_bool(WIFSIGNALED(C_unfix(n)))
# define C_WIFSTOPPED(n) C_mk_bool(WIFSTOPPED(C_unfix(n)))
# define C_WEXITSTATUS(n) C_fix(WEXITSTATUS(C_unfix(n)))
# define C_WTERMSIG(n) C_fix(WTERMSIG(C_unfix(n)))
# define C_WSTOPSIG(n) C_fix(WSTOPSIG(C_unfix(n)))
#endif
#ifdef __CYGWIN__
# define C_mkfifo(fn, m) C_fix(-1);
#else
# define C_mkfifo(fn, m) C_fix(mkfifo((char *)C_data_pointer(fn), C_unfix(m)))
#endif
#define C_flock_setup(t, s, n) (C_flock.l_type = C_unfix(t), C_flock.l_start = C_num_to_int(s), C_flock.l_whence = SEEK_SET, C_flock.l_len = C_num_to_int(n), C_SCHEME_UNDEFINED)
#define C_flock_test(p) (fcntl(fileno(C_port_file(p)), F_GETLK, &C_flock) >= 0 ? (C_flock.l_type == F_UNLCK ? C_fix(0) : C_fix(C_flock.l_pid)) : C_SCHEME_FALSE)
#define C_flock_lock(p) C_fix(fcntl(fileno(C_port_file(p)), F_SETLK, &C_flock))
#define C_flock_lockw(p) C_fix(fcntl(fileno(C_port_file(p)), F_SETLKW, &C_flock))
#ifndef FILENAME_MAX
# define FILENAME_MAX 1024
#endif
static C_TLS sigset_t C_sigset;
#define C_sigemptyset(d) (sigemptyset(&C_sigset), C_SCHEME_UNDEFINED)
#define C_sigaddset(s) (sigaddset(&C_sigset, C_unfix(s)), C_SCHEME_UNDEFINED)
#define C_sigdelset(s) (sigdelset(&C_sigset, C_unfix(s)), C_SCHEME_UNDEFINED)
#define C_sigismember(s) C_mk_bool(sigismember(&C_sigset, C_unfix(s)))
#define C_sigprocmask_set(d) C_fix(sigprocmask(SIG_SETMASK, &C_sigset, NULL))
#define C_sigprocmask_block(d) C_fix(sigprocmask(SIG_BLOCK, &C_sigset, NULL))
#define C_sigprocmask_unblock(d) C_fix(sigprocmask(SIG_UNBLOCK, &C_sigset, NULL))
#define C_open(fn, fl, m) C_fix(open(C_c_string(fn), C_unfix(fl), C_unfix(m)))
#define C_read(fd, b, n) C_fix(read(C_unfix(fd), C_data_pointer(b), C_unfix(n)))
#define C_write(fd, b, n) C_fix(write(C_unfix(fd), C_data_pointer(b), C_unfix(n)))
#define C_mkstemp(t) C_fix(mkstemp(C_c_string(t)))
#define C_ftell(p) C_fix(ftell(C_port_file(p)))
#define C_fseek(p, n, w) C_mk_nbool(fseek(C_port_file(p), C_unfix(n), C_unfix(w)))
#define C_lseek(fd, o, w) C_fix(lseek(C_unfix(fd), C_unfix(o), C_unfix(w)))
#define C_zero_fd_set(i) FD_ZERO(&C_fd_sets[ i ])
#define C_set_fd_set(i, fd) FD_SET(fd, &C_fd_sets[ i ])
#define C_test_fd_set(i, fd) FD_ISSET(fd, &C_fd_sets[ i ])
#define C_C_select(m) C_fix(select(C_unfix(m), &C_fd_sets[ 0 ], &C_fd_sets[ 1 ], NULL, NULL))
#define C_C_select_t(m, t) (C_set_timeval(t, &C_timeval), \
C_fix(select(C_unfix(m), &C_fd_sets[ 0 ], &C_fd_sets[ 1 ], NULL, &C_timeval)))
#define C_ctime(n) (C_secs = (n), ctime(&C_secs))
#if defined(__SVR4)
/* Seen here: http://lists.samba.org/archive/samba-technical/2002-November/025571.html */
static time_t timegm(struct tm *t)
{
time_t tl, tb;
struct tm *tg;
tl = mktime (t);
if (tl == -1)
{
t->tm_hour--;
tl = mktime (t);
if (tl == -1)
return -1; /* can't deal with output from strptime */
tl += 3600;
}
tg = gmtime (&tl);
tg->tm_isdst = 0;
tb = mktime (tg);
if (tb == -1)
{
tg->tm_hour--;
tb = mktime (tg);
if (tb == -1)
return -1; /* can't deal with output from gmtime */
tb += 3600;
}
return (tl - (tb - tl));
}
#endif
#define cpy_tmvec_to_tmstc08(ptm, v) \
(memset((ptm), 0, sizeof(struct tm)), \
(ptm)->tm_sec = C_unfix(C_block_item((v), 0)), \
(ptm)->tm_min = C_unfix(C_block_item((v), 1)), \
(ptm)->tm_hour = C_unfix(C_block_item((v), 2)), \
(ptm)->tm_mday = C_unfix(C_block_item((v), 3)), \
(ptm)->tm_mon = C_unfix(C_block_item((v), 4)), \
(ptm)->tm_year = C_unfix(C_block_item((v), 5)), \
(ptm)->tm_wday = C_unfix(C_block_item((v), 6)), \
(ptm)->tm_yday = C_unfix(C_block_item((v), 7)), \
(ptm)->tm_isdst = (C_block_item((v), 8) != C_SCHEME_FALSE))
#define cpy_tmvec_to_tmstc9(ptm, v) \
(((struct tm *)ptm)->tm_gmtoff = C_unfix(C_block_item((v), 9)))
#define cpy_tmstc08_to_tmvec(v, ptm) \
(C_set_block_item((v), 0, C_fix(((struct tm *)ptm)->tm_sec)), \
C_set_block_item((v), 1, C_fix((ptm)->tm_min)), \
C_set_block_item((v), 2, C_fix((ptm)->tm_hour)), \
C_set_block_item((v), 3, C_fix((ptm)->tm_mday)), \
C_set_block_item((v), 4, C_fix((ptm)->tm_mon)), \
C_set_block_item((v), 5, C_fix((ptm)->tm_year)), \
C_set_block_item((v), 6, C_fix((ptm)->tm_wday)), \
C_set_block_item((v), 7, C_fix((ptm)->tm_yday)), \
C_set_block_item((v), 8, ((ptm)->tm_isdst ? C_SCHEME_TRUE : C_SCHEME_FALSE)))
#define cpy_tmstc9_to_tmvec(v, ptm) \
(C_set_block_item((v), 9, C_fix((ptm)->tm_gmtoff)))
#define C_tm_set_08(v) cpy_tmvec_to_tmstc08( &C_tm, (v) )
#define C_tm_set_9(v) cpy_tmvec_to_tmstc9( &C_tm, (v) )
#define C_tm_get_08(v) cpy_tmstc08_to_tmvec( (v), &C_tm )
#define C_tm_get_9(v) cpy_tmstc9_to_tmvec( (v), &C_tm )
#if !defined(C_GNU_ENV) || defined(__CYGWIN__) || defined(__uClinux__)
static struct tm *
C_tm_set( C_word v )
{
C_tm_set_08( v );
return &C_tm;
}
static C_word
C_tm_get( C_word v )
{
C_tm_get_08( v );
return v;
}
#else
static struct tm *
C_tm_set( C_word v )
{
C_tm_set_08( v );
C_tm_set_9( v );
return &C_tm;
}
static C_word
C_tm_get( C_word v )
{
C_tm_get_08( v );
C_tm_get_9( v );
return v;
}
#endif
#define C_asctime(v) (asctime(C_tm_set(v)))
#define C_mktime(v) ((C_temporary_flonum = mktime(C_tm_set(v))) != -1)
#define C_timegm(v) ((C_temporary_flonum = timegm(C_tm_set(v))) != -1)
#define TIME_STRING_MAXLENGTH 255
static char C_time_string [TIME_STRING_MAXLENGTH + 1];
#undef TIME_STRING_MAXLENGTH
#define C_strftime(v, f) \
(strftime(C_time_string, sizeof(C_time_string), C_c_string(f), C_tm_set(v)) ? C_time_string : NULL)
#define C_strptime(s, f, v) \
(strptime(C_c_string(s), C_c_string(f), &C_tm) ? C_tm_get(v) : C_SCHEME_FALSE)
static gid_t *C_groups = NULL;
#define C_get_gid(n) C_fix(C_groups[ C_unfix(n) ])
#define C_set_gid(n, id) (C_groups[ C_unfix(n) ] = C_unfix(id), C_SCHEME_UNDEFINED)
#define C_set_groups(n) C_fix(setgroups(C_unfix(n), C_groups))
#ifdef TIOCGWINSZ
static int get_tty_size(int p, int *rows, int *cols)
{
struct winsize tty_size;
int r;
memset(&tty_size, 0, sizeof tty_size);
r = ioctl(p, TIOCGWINSZ, &tty_size);
if (r == 0) {
*rows = tty_size.ws_row;
*cols = tty_size.ws_col;
}
return r;
}
#else
static int get_tty_size(int p, int *rows, int *cols)
{
*rows = *cols = 0;
return -1;
}
#endif
EOF
) )
(cond-expand
[paranoia]
[else
(declare
(no-bound-checks)
(no-procedure-checks-for-usual-bindings)
(bound-to-procedure
string-match glob->regexp regexp
##sys#thread-yield! ##sys#make-string
##sys#make-port ##sys#file-info ##sys#update-errno ##sys#fudge ##sys#make-c-string ##sys#check-port
##sys#error ##sys#signal-hook ##sys#peek-unsigned-integer make-pathname glob directory?
pathname-file process-fork file-close duplicate-fileno process-execute get-environment-variable
make-string make-input-port make-output-port ##sys#thread-block-for-i/o create-pipe
process-wait pathname-strip-directory ##sys#expand-home-path directory
decompose-pathname ##sys#cons-flonum ##sys#decode-seconds ##sys#null-pointer ##sys#pointer->address
##sys#substring ##sys#context-switch close-input-pipe close-output-pipe change-directory
current-directory ##sys#make-pointer port? ##sys#schedule ##sys#process
##sys#peek-fixnum ##sys#make-structure ##sys#check-structure ##sys#enable-interrupts
make-nonblocking-input-port make-nonblocking-output-port
canonical-path) ) ] )
(include "unsafe-declarations.scm")
(register-feature! 'posix)
(define posix-error
(let ([strerror (foreign-lambda c-string "strerror" int)]
[string-append string-append] )
(lambda (type loc msg . args)
(let ([rn (##sys#update-errno)])
(apply ##sys#signal-hook type loc (string-append msg " - " (strerror rn)) args) ) ) ) )
;; Faster versions of common operations
(define ##sys#posix-error posix-error)
(define ##sys#file-nonblocking!
(foreign-lambda* bool ([int fd])
"int val = fcntl(fd, F_GETFL, 0);"
"if(val == -1) return(0);"
"return(fcntl(fd, F_SETFL, val | O_NONBLOCK) != -1);" ) )
(define ##sys#file-select-one
(foreign-lambda* int ([int fd])
"fd_set in;"
"struct timeval tm;"
"FD_ZERO(&in);"
"FD_SET(fd, &in);"
"tm.tv_sec = tm.tv_usec = 0;"
"if(select(fd + 1, &in, NULL, NULL, &tm) == -1) return(-1);"
"else return(FD_ISSET(fd, &in) ? 1 : 0);" ) )
;;; Lo-level I/O:
(define-foreign-variable _pipe_buf int "PIPE_BUF")
(define pipe/buf _pipe_buf)
(define-foreign-variable _f_dupfd int "F_DUPFD")
(define-foreign-variable _f_getfd int "F_GETFD")
(define-foreign-variable _f_setfd int "F_SETFD")
(define-foreign-variable _f_getfl int "F_GETFL")
(define-foreign-variable _f_setfl int "F_SETFL")
(define fcntl/dupfd _f_dupfd)
(define fcntl/getfd _f_getfd)
(define fcntl/setfd _f_setfd)
(define fcntl/getfl _f_getfl)
(define fcntl/setfl _f_setfl)
(define-foreign-variable _o_rdonly int "O_RDONLY")
(define-foreign-variable _o_wronly int "O_WRONLY")
(define-foreign-variable _o_rdwr int "O_RDWR")
(define-foreign-variable _o_creat int "O_CREAT")
(define-foreign-variable _o_append int "O_APPEND")
(define-foreign-variable _o_excl int "O_EXCL")
(define-foreign-variable _o_noctty int "O_NOCTTY")
(define-foreign-variable _o_nonblock int "O_NONBLOCK")
(define-foreign-variable _o_trunc int "O_TRUNC")
(define-foreign-variable _o_fsync int "O_FSYNC")
(define-foreign-variable _o_binary int "O_BINARY")
(define-foreign-variable _o_text int "O_TEXT")
(define open/rdonly _o_rdonly)
(define open/wronly _o_wronly)
(define open/rdwr _o_rdwr)
(define open/read _o_rdonly)
(define open/write _o_wronly)
(define open/creat _o_creat)
(define open/append _o_append)
(define open/excl _o_excl)
(define open/noctty _o_noctty)
(define open/nonblock _o_nonblock)
(define open/trunc _o_trunc)
(define open/sync _o_fsync)
(define open/fsync _o_fsync)
(define open/binary _o_binary)
(define open/text _o_text)
(define-foreign-variable _s_irusr int "S_IRUSR")
(define-foreign-variable _s_iwusr int "S_IWUSR")
(define-foreign-variable _s_ixusr int "S_IXUSR")
(define-foreign-variable _s_irgrp int "S_IRGRP")
(define-foreign-variable _s_iwgrp int "S_IWGRP")
(define-foreign-variable _s_ixgrp int "S_IXGRP")
(define-foreign-variable _s_iroth int "S_IROTH")
(define-foreign-variable _s_iwoth int "S_IWOTH")
(define-foreign-variable _s_ixoth int "S_IXOTH")
(define-foreign-variable _s_irwxu int "S_IRWXU")
(define-foreign-variable _s_irwxg int "S_IRWXG")
(define-foreign-variable _s_irwxo int "S_IRWXO")
(define-foreign-variable _s_isuid int "S_ISUID")
(define-foreign-variable _s_isgid int "S_ISGID")
(define-foreign-variable _s_isvtx int "S_ISVTX")
(define perm/irusr _s_irusr)
(define perm/iwusr _s_iwusr)
(define perm/ixusr _s_ixusr)
(define perm/irgrp _s_irgrp)
(define perm/iwgrp _s_iwgrp)
(define perm/ixgrp _s_ixgrp)
(define perm/iroth _s_iroth)
(define perm/iwoth _s_iwoth)
(define perm/ixoth _s_ixoth)
(define perm/irwxu _s_irwxu)
(define perm/irwxg _s_irwxg)
(define perm/irwxo _s_irwxo)
(define perm/isvtx _s_isvtx)
(define perm/isuid _s_isuid)
(define perm/isgid _s_isgid)
(define file-control
(let ([fcntl (foreign-lambda int fcntl int int long)])
(lambda (fd cmd #!optional (arg 0))
(##sys#check-exact fd 'file-control)
(##sys#check-exact cmd 'file-control)
(let ([res (fcntl fd cmd arg)])
(if (fx= res -1)
(posix-error #:file-error 'file-control "cannot control file" fd cmd)
res ) ) ) ) )
(define file-open
(let ([defmode (bitwise-ior _s_irwxu (bitwise-ior _s_irgrp _s_iroth))] )
(lambda (filename flags . mode)
(let ([mode (if (pair? mode) (car mode) defmode)])
(##sys#check-string filename 'file-open)
(##sys#check-exact flags 'file-open)
(##sys#check-exact mode 'file-open)
(let ([fd (##core#inline "C_open" (##sys#make-c-string (##sys#expand-home-path filename)) flags mode)])
(when (eq? -1 fd)
(posix-error #:file-error 'file-open "cannot open file" filename flags mode) )
fd) ) ) ) )
(define file-close
(lambda (fd)
(##sys#check-exact fd 'file-close)
(when (fx< (##core#inline "C_close" fd) 0)
(posix-error #:file-error 'file-close "cannot close file" fd) ) ) )
(define file-read
(let ([make-string make-string] )
(lambda (fd size . buffer)
(##sys#check-exact fd 'file-read)
(##sys#check-exact size 'file-read)
(let ([buf (if (pair? buffer) (car buffer) (make-string size))])
(unless (and (##core#inline "C_blockp" buf) (##core#inline "C_byteblockp" buf))
(##sys#signal-hook #:type-error 'file-read "bad argument type - not a string or blob" buf) )
(let ([n (##core#inline "C_read" fd buf size)])
(when (eq? -1 n)
(posix-error #:file-error 'file-read "cannot read from file" fd size) )
(list buf n) ) ) ) ) )
(define file-write
(lambda (fd buffer . size)
(##sys#check-exact fd 'file-write)
(unless (and (##core#inline "C_blockp" buffer) (##core#inline "C_byteblockp" buffer))
(##sys#signal-hook #:type-error 'file-write "bad argument type - not a string or blob" buffer) )
(let ([size (if (pair? size) (car size) (##sys#size buffer))])
(##sys#check-exact size 'file-write)
(let ([n (##core#inline "C_write" fd buffer size)])
(when (eq? -1 n)
(posix-error #:file-error 'file-write "cannot write to file" fd size) )
n) ) ) )
(define file-mkstemp
(lambda (template)
(##sys#check-string template 'file-mkstemp)
(let* ([buf (##sys#make-c-string template)]
[fd (##core#inline "C_mkstemp" buf)]
[path-length (##sys#size buf)])
(when (eq? -1 fd)
(posix-error #:file-error 'file-mkstemp "cannot create temporary file" template) )
(values fd (##sys#substring buf 0 (fx- path-length 1) ) ) ) ) )
;;; I/O multiplexing:
(define file-select
(let ([fd_zero (foreign-lambda void "C_zero_fd_set" int)]
[fd_set (foreign-lambda void "C_set_fd_set" int int)]
[fd_test (foreign-lambda bool "C_test_fd_set" int int)] )
(lambda (fdsr fdsw . timeout)
(let ([fdmax 0]
[tm (if (pair? timeout) (car timeout) #f)] )
(fd_zero 0)
(fd_zero 1)
(cond [(not fdsr)]
[(fixnum? fdsr)
(set! fdmax fdsr)
(fd_set 0 fdsr) ]
[else
(##sys#check-list fdsr 'file-select)
(for-each
(lambda (fd)
(##sys#check-exact fd 'file-select)
(set! fdmax (##core#inline "C_i_fixnum_max" fdmax fd))
(fd_set 0 fd) )
fdsr) ] )
(cond [(not fdsw)]
[(fixnum? fdsw)
(set! fdmax fdsw)
(fd_set 1 fdsw) ]
[else
(##sys#check-list fdsw 'file-select)
(for-each
(lambda (fd)
(##sys#check-exact fd 'file-select)
(set! fdmax (##core#inline "C_i_fixnum_max" fdmax fd))
(fd_set 1 fd) )
fdsw) ] )
(let ([n (cond [tm
(##sys#check-number tm 'file-select)
(##core#inline "C_C_select_t" (fx+ fdmax 1) tm) ]
[else (##core#inline "C_C_select" (fx+ fdmax 1))] ) ] )
(cond [(fx< n 0)
(posix-error #:file-error 'file-select "failed" fdsr fdsw) ]
[(fx= n 0) (values (if (pair? fdsr) '() #f) (if (pair? fdsw) '() #f))]
[else
(values
(and fdsr
(if (fixnum? fdsr)
(fd_test 0 fdsr)
(let ([lstr '()])
(for-each (lambda (fd) (when (fd_test 0 fd) (set! lstr (cons fd lstr)))) fdsr)
lstr) ) )
(and fdsw
(if (fixnum? fdsw)
(fd_test 1 fdsw)
(let ([lstw '()])
(for-each (lambda (fd) (when (fd_test 1 fd) (set! lstw (cons fd lstw)))) fdsw)
lstw) ) ) ) ] ) ) ) ) ) )
;;; File attribute access:
(define-foreign-variable _seek_set int "SEEK_SET")
(define-foreign-variable _seek_cur int "SEEK_CUR")
(define-foreign-variable _seek_end int "SEEK_END")
(define seek/set _seek_set)
(define seek/end _seek_end)
(define seek/cur _seek_cur)
(define-foreign-variable _stat_st_ino unsigned-int "C_statbuf.st_ino")
(define-foreign-variable _stat_st_nlink unsigned-int "C_statbuf.st_nlink")
(define-foreign-variable _stat_st_gid unsigned-int "C_statbuf.st_gid")
(define-foreign-variable _stat_st_size integer64 "C_statbuf.st_size")
(define-foreign-variable _stat_st_mtime double "C_statbuf.st_mtime")
(define-foreign-variable _stat_st_atime double "C_statbuf.st_atime")
(define-foreign-variable _stat_st_ctime double "C_statbuf.st_ctime")
(define-foreign-variable _stat_st_uid unsigned-int "C_statbuf.st_uid")
(define-foreign-variable _stat_st_mode unsigned-int "C_statbuf.st_mode")
(define-foreign-variable _stat_st_dev unsigned-int "C_statbuf.st_dev")
(define-foreign-variable _stat_st_rdev unsigned-int "C_statbuf.st_rdev")
(define-foreign-variable _stat_st_blksize unsigned-int "C_statbuf.st_blksize")
(define-foreign-variable _stat_st_blocks unsigned-int "C_statbuf.st_blocks")
(define (##sys#stat file link loc)
(let ([r (cond [(fixnum? file) (##core#inline "C_fstat" file)]
[(string? file)
(let ([path (##sys#make-c-string (##sys#expand-home-path file))])
(if link
(##core#inline "C_lstat" path)
(##core#inline "C_stat" path) ) ) ]
[else (##sys#signal-hook #:type-error "bad argument type - not a fixnum or string" file)] ) ] )
(when (fx< r 0)
(posix-error #:file-error loc "cannot access file" file) ) ) )
(define (file-stat f . link)
(##sys#stat f (optional link #f) 'file-stat)
(vector _stat_st_ino _stat_st_mode _stat_st_nlink
_stat_st_uid _stat_st_gid _stat_st_size
_stat_st_atime _stat_st_ctime _stat_st_mtime
_stat_st_dev _stat_st_rdev
_stat_st_blksize _stat_st_blocks) )
(define (file-size f) (##sys#stat f #f 'file-size) _stat_st_size)
(define (file-modification-time f) (##sys#stat f #f 'file-modification-time) _stat_st_mtime)
(define (file-access-time f) (##sys#stat f #f 'file-access-time) _stat_st_atime)
(define (file-change-time f) (##sys#stat f #f 'file-change-time) _stat_st_ctime)
(define (file-owner f) (##sys#stat f #f 'file-owner) _stat_st_uid)
(define (file-permissions f) (##sys#stat f #f 'file-permissions) _stat_st_mode)
(define (regular-file? fname)
(##sys#check-string fname 'regular-file?)
(##sys#stat fname #t 'regular-file?)
(foreign-value "C_isreg" bool) )
(define (symbolic-link? fname)
(##sys#check-string fname 'symbolic-link?)
(##sys#stat fname #t 'symbolic-link?)
(foreign-value "C_islink" bool) )
(define (stat-regular? fname) ; DEPRECATED
(##sys#check-string fname 'stat-regular?)
(##sys#stat fname #f 'stat-regular?)
(foreign-value "C_isreg" bool))
(define (stat-directory? fname) ; DEPRECATED
(##sys#check-string fname 'stat-directory?)
(##sys#stat fname #f 'stat-directory?)
(foreign-value "C_isdir" bool))
(define (character-device? fname)
(##sys#check-string fname 'character-device?)
(##sys#stat fname #f 'character-device?)
(foreign-value "C_ischr" bool))
(define stat-char-device? character-device?) ; DEPRECATED
(define (block-device? fname)
(##sys#check-string fname 'block-device?)
(##sys#stat fname #f 'block-device?)
(foreign-value "C_isblk" bool))
(define stat-block-device? block-device?) ; DEPRECATED
(define (fifo? fname)
(##sys#check-string fname 'stat-fifo?)
(##sys#stat fname #f 'stat-fifo?)
(foreign-value "C_isfifo" bool))
(define stat-fifo? fifo?) ; DEPRECATED
(define stat-symlink? symbolic-link?) ; DEPRECATED
(define (socket? fname)
(##sys#check-string fname 'socket?)
(##sys#stat fname #f 'socket?)
(foreign-value "C_issock" bool))
(define stat-socket? socket?) ; DEPRECATED
(define set-file-position!
(lambda (port pos . whence)
(let ([whence (if (pair? whence) (car whence) _seek_set)])
(##sys#check-exact pos 'set-file-position!)
(##sys#check-exact whence 'set-file-position!)
(when (fx< pos 0) (##sys#signal-hook #:bounds-error 'set-file-position! "invalid negative port position" pos port))
(unless (cond [(port? port)
(and (eq? (##sys#slot port 7) 'stream)
(##core#inline "C_fseek" port pos whence) ) ]
[(fixnum? port) (##core#inline "C_lseek" port pos whence)]
[else (##sys#signal-hook #:type-error 'set-file-position! "invalid file" port)] )
(posix-error #:file-error 'set-file-position! "cannot set file position" port pos) ) ) ) )
(define file-position
(getter-with-setter
(lambda (port)
(let ([pos (cond [(port? port)
(if (eq? (##sys#slot port 7) 'stream)
(##core#inline "C_ftell" port)
-1) ]
[(fixnum? port) (##core#inline "C_lseek" port 0 _seek_cur)]
[else (##sys#signal-hook #:type-error 'file-position "invalid file" port)] ) ] )
(when (fx< pos 0)
(posix-error #:file-error 'file-position "cannot retrieve file position of port" port) )
pos) )
set-file-position!) ) ; doesn't accept WHENCE
;;; Directory stuff:
(define-inline (create-directory-helper name)
(unless (zero? (##core#inline "C_mkdir" (##sys#make-c-string name)))
(posix-error #:file-error 'create-directory
"cannot create directory" name)))
(define-inline (create-directory-check name)
(if (file-exists? name)
(if (fx< (##core#inline "C_stat" (##sys#make-c-string name)) 0)
(posix-error #:file-error 'create-directory
"cannot stat file" name)
(or (foreign-value "C_isdir" bool)
(posix-error #:file-error 'create-directory
"path segment is a file" name)))
#f))
(define-inline (create-directory-helper-silent name)
(unless (create-directory-check name)
(create-directory-helper name)))
(define-inline (create-directory-helper-parents name)
(let ((c ""))
(for-each
(lambda (x)
(set! c (string-append c "/" x))
(create-directory-helper-silent c))
(string-split name "/"))))
(define create-directory
(lambda (name #!optional parents?)
(##sys#check-string name 'create-directory)
(if parents?
(create-directory-helper-parents name)
(create-directory-helper name))))
(define change-directory
(lambda (name)
(##sys#check-string name 'change-directory)
(unless (zero? (##core#inline "C_chdir" (##sys#make-c-string (##sys#expand-home-path name))))
(posix-error #:file-error 'change-directory "cannot change current directory" name) ) ) )
(define delete-directory
(lambda (name)
(##sys#check-string name 'delete-directory)
(unless (zero? (##core#inline "C_rmdir" (##sys#make-c-string (##sys#expand-home-path name))))
(posix-error #:file-error 'delete-directory "cannot delete directory" name) ) ) )
(define directory
(let ([string-ref string-ref]
[make-string make-string]
[string string] )
(lambda (#!optional (spec (current-directory)) show-dotfiles?)
(##sys#check-string spec 'directory)
(let ([buffer (make-string 256)]
[handle (##sys#make-pointer)]
[entry (##sys#make-pointer)] )
(##core#inline "C_opendir" (##sys#make-c-string (##sys#expand-home-path spec)) handle)
(if (##sys#null-pointer? handle)
(posix-error #:file-error 'directory "cannot open directory" spec)
(let loop ()
(##core#inline "C_readdir" handle entry)
(if (##sys#null-pointer? entry)
(begin
(##core#inline "C_closedir" handle)
'() )
(let* ([flen (##core#inline "C_foundfile" entry buffer)]
[file (##sys#substring buffer 0 flen)]
[char1 (string-ref file 0)]
[char2 (and (fx> flen 1) (string-ref file 1))] )
(if (and (eq? #\. char1)
(or (not char2)
(and (eq? #\. char2) (eq? 2 flen))
(not show-dotfiles?) ) )
(loop)
(cons file (loop)) ) ) ) ) ) ) ) ) )
(define (directory? fname)
(##sys#check-string fname 'directory?)
(let ((info (##sys#file-info (##sys#expand-home-path fname))))
(and info (fx= 1 (##sys#slot info 4))) ) )
(define current-directory
(let ([make-string make-string])
(lambda (#!optional dir)
(if dir
(change-directory dir)
(let* ([buffer (make-string 256)]
[len (##core#inline "C_curdir" buffer)] )
(if len
(##sys#substring buffer 0 len)
(posix-error #:file-error 'current-directory "cannot retrieve current directory") ) ) ) ) ) )
(define canonical-path ; DEPRECATED
(let ((null? null?)
(char=? char=?)
(string=? string=?)
(alpha? char-alphabetic?)
(sref string-ref)
(ssplit (cut string-split <> "/\\"))
(sappend string-append)
(isperse (cut string-intersperse <> "/"))
(sep? (lambda (c) (or (char=? #\/ c) (char=? #\\ c))))
(get-environment-variable get-environment-variable)
(user current-user-name)
(cwd (let ((cw current-directory))
(lambda ()
(condition-case (cw)
(var () "/"))))))
(lambda (path)
(##sys#check-string path 'canonical-path)
(let ((p (cond ((fx= 0 (##sys#size path))
(sappend (cwd) "/"))
((and (fx< (##sys#size path) 3)
(sep? (sref path 0)))
path)
((fx= 1 (##sys#size path))
(sappend (cwd) "/" path))
((and (char=? #\~ (sref path 0))
(sep? (sref path 1)))
(sappend
(or (get-environment-variable "HOME")
(sappend "/home/" (user)))
(##sys#substring path 1
(##sys#size path))))
((fx= 2 (##sys#size path))
(sappend (cwd) "/" path))
((and (alpha? (sref path 0))
(char=? #\: (sref path 1))
(sep? (sref path 2)))
(##sys#substring path 3 (##sys#size path)))
((and (char=? #\/ (sref path 0))
(alpha? (sref path 1))
(char=? #\: (sref path 2)))
(##sys#substring path 3 (##sys#size path)))
((sep? (sref path 0))
path)
(else
(sappend (cwd) "/" path)))))
(let loop ((l (ssplit p))
(r '()))
(if (null? l)