forked from fgeller/emacs-mac-port
/
callproc.c
1728 lines (1501 loc) · 50.1 KB
/
callproc.c
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/* Synchronous subprocess invocation for GNU Emacs.
Copyright (C) 1985-1988, 1993-1995, 1999-2012
Free Software Foundation, Inc.
This file is part of GNU Emacs.
GNU Emacs is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
GNU Emacs is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
#include <config.h>
#include <errno.h>
#include <stdio.h>
#include <sys/types.h>
#include <unistd.h>
#include <sys/file.h>
#include <fcntl.h>
#include "lisp.h"
#ifdef WINDOWSNT
#define NOMINMAX
#include <windows.h>
#include "w32.h"
#define _P_NOWAIT 1 /* from process.h */
#endif
#ifdef MSDOS /* Demacs 1.1.1 91/10/16 HIRANO Satoshi */
#include <sys/stat.h>
#include <sys/param.h>
#endif /* MSDOS */
#include "commands.h"
#include "character.h"
#include "buffer.h"
#include "ccl.h"
#include "coding.h"
#include "composite.h"
#include <epaths.h>
#include "process.h"
#include "syssignal.h"
#include "systty.h"
#include "syswait.h"
#include "blockinput.h"
#include "frame.h"
#include "termhooks.h"
#ifdef MSDOS
#include "msdos.h"
#endif
#ifdef HAVE_NS
#include "nsterm.h"
#endif
/* Pattern used by call-process-region to make temp files. */
static Lisp_Object Vtemp_file_name_pattern;
/* True if we are about to fork off a synchronous process or if we
are waiting for it. */
bool synch_process_alive;
/* Nonzero => this is a string explaining death of synchronous subprocess. */
const char *synch_process_death;
/* Nonzero => this is the signal number that terminated the subprocess. */
int synch_process_termsig;
/* If synch_process_death is zero,
this is exit code of synchronous subprocess. */
int synch_process_retcode;
/* Clean up when exiting Fcall_process.
On MSDOS, delete the temporary file on any kind of termination.
On Unix, kill the process and any children on termination by signal. */
/* True if this is termination due to exit. */
static bool call_process_exited;
static Lisp_Object
call_process_kill (Lisp_Object fdpid)
{
int fd;
pid_t pid;
CONS_TO_INTEGER (Fcar (fdpid), int, fd);
CONS_TO_INTEGER (Fcdr (fdpid), pid_t, pid);
emacs_close (fd);
EMACS_KILLPG (pid, SIGKILL);
synch_process_alive = 0;
return Qnil;
}
static Lisp_Object
call_process_cleanup (Lisp_Object arg)
{
Lisp_Object fdpid = Fcdr (arg);
int fd;
#if defined (MSDOS)
Lisp_Object file;
#else
pid_t pid;
#endif
Fset_buffer (Fcar (arg));
CONS_TO_INTEGER (Fcar (fdpid), int, fd);
#if defined (MSDOS)
/* for MSDOS fdpid is really (fd . tempfile) */
file = Fcdr (fdpid);
/* FD is -1 and FILE is "" when we didn't actually create a
temporary file in call-process. */
if (fd >= 0)
emacs_close (fd);
if (!(strcmp (SDATA (file), NULL_DEVICE) == 0 || SREF (file, 0) == '\0'))
unlink (SDATA (file));
#else /* not MSDOS */
CONS_TO_INTEGER (Fcdr (fdpid), pid_t, pid);
if (call_process_exited)
{
emacs_close (fd);
return Qnil;
}
if (EMACS_KILLPG (pid, SIGINT) == 0)
{
ptrdiff_t count = SPECPDL_INDEX ();
record_unwind_protect (call_process_kill, fdpid);
message1 ("Waiting for process to die...(type C-g again to kill it instantly)");
immediate_quit = 1;
QUIT;
wait_for_termination (pid);
immediate_quit = 0;
specpdl_ptr = specpdl + count; /* Discard the unwind protect. */
message1 ("Waiting for process to die...done");
}
synch_process_alive = 0;
emacs_close (fd);
#endif /* not MSDOS */
return Qnil;
}
DEFUN ("call-process", Fcall_process, Scall_process, 1, MANY, 0,
doc: /* Call PROGRAM synchronously in separate process.
The remaining arguments are optional.
The program's input comes from file INFILE (nil means `/dev/null').
Insert output in BUFFER before point; t means current buffer; nil for BUFFER
means discard it; 0 means discard and don't wait; and `(:file FILE)', where
FILE is a file name string, means that it should be written to that file
\(if the file already exists it is overwritten).
BUFFER can also have the form (REAL-BUFFER STDERR-FILE); in that case,
REAL-BUFFER says what to do with standard output, as above,
while STDERR-FILE says what to do with standard error in the child.
STDERR-FILE may be nil (discard standard error output),
t (mix it with ordinary output), or a file name string.
Fourth arg DISPLAY non-nil means redisplay buffer as output is inserted.
Remaining arguments are strings passed as command arguments to PROGRAM.
If executable PROGRAM can't be found as an executable, `call-process'
signals a Lisp error. `call-process' reports errors in execution of
the program only through its return and output.
If BUFFER is 0, `call-process' returns immediately with value nil.
Otherwise it waits for PROGRAM to terminate
and returns a numeric exit status or a signal description string.
If you quit, the process is killed with SIGINT, or SIGKILL if you quit again.
usage: (call-process PROGRAM &optional INFILE BUFFER DISPLAY &rest ARGS) */)
(ptrdiff_t nargs, Lisp_Object *args)
{
Lisp_Object infile, buffer, current_dir, path, cleanup_info_tail;
bool display_p;
int fd[2];
int filefd;
#define CALLPROC_BUFFER_SIZE_MIN (16 * 1024)
#define CALLPROC_BUFFER_SIZE_MAX (4 * CALLPROC_BUFFER_SIZE_MIN)
char buf[CALLPROC_BUFFER_SIZE_MAX];
int bufsize = CALLPROC_BUFFER_SIZE_MIN;
ptrdiff_t count = SPECPDL_INDEX ();
USE_SAFE_ALLOCA;
register const unsigned char **new_argv;
/* File to use for stderr in the child.
t means use same as standard output. */
Lisp_Object error_file;
Lisp_Object output_file = Qnil;
#ifdef MSDOS /* Demacs 1.1.1 91/10/16 HIRANO Satoshi */
char *outf, *tempfile = NULL;
int outfilefd;
int pid;
#else
pid_t pid;
#endif
int fd_output = -1;
struct coding_system process_coding; /* coding-system of process output */
struct coding_system argument_coding; /* coding-system of arguments */
/* Set to the return value of Ffind_operation_coding_system. */
Lisp_Object coding_systems;
bool output_to_buffer = 1;
/* Qt denotes that Ffind_operation_coding_system is not yet called. */
coding_systems = Qt;
CHECK_STRING (args[0]);
error_file = Qt;
#ifndef subprocesses
/* Without asynchronous processes we cannot have BUFFER == 0. */
if (nargs >= 3
&& (INTEGERP (CONSP (args[2]) ? XCAR (args[2]) : args[2])))
error ("Operating system cannot handle asynchronous subprocesses");
#endif /* subprocesses */
/* Decide the coding-system for giving arguments. */
{
Lisp_Object val, *args2;
ptrdiff_t i;
/* If arguments are supplied, we may have to encode them. */
if (nargs >= 5)
{
bool must_encode = 0;
Lisp_Object coding_attrs;
for (i = 4; i < nargs; i++)
CHECK_STRING (args[i]);
for (i = 4; i < nargs; i++)
if (STRING_MULTIBYTE (args[i]))
must_encode = 1;
if (!NILP (Vcoding_system_for_write))
val = Vcoding_system_for_write;
else if (! must_encode)
val = Qraw_text;
else
{
SAFE_NALLOCA (args2, 1, nargs + 1);
args2[0] = Qcall_process;
for (i = 0; i < nargs; i++) args2[i + 1] = args[i];
coding_systems = Ffind_operation_coding_system (nargs + 1, args2);
val = CONSP (coding_systems) ? XCDR (coding_systems) : Qnil;
}
val = complement_process_encoding_system (val);
setup_coding_system (Fcheck_coding_system (val), &argument_coding);
coding_attrs = CODING_ID_ATTRS (argument_coding.id);
if (NILP (CODING_ATTR_ASCII_COMPAT (coding_attrs)))
{
/* We should not use an ASCII incompatible coding system. */
val = raw_text_coding_system (val);
setup_coding_system (val, &argument_coding);
}
}
}
if (nargs >= 2 && ! NILP (args[1]))
{
infile = Fexpand_file_name (args[1], BVAR (current_buffer, directory));
CHECK_STRING (infile);
}
else
infile = build_string (NULL_DEVICE);
if (nargs >= 3)
{
buffer = args[2];
/* If BUFFER is a list, its meaning is (BUFFER-FOR-STDOUT
FILE-FOR-STDERR), unless the first element is :file, in which case see
the next paragraph. */
if (CONSP (buffer)
&& (! SYMBOLP (XCAR (buffer))
|| strcmp (SSDATA (SYMBOL_NAME (XCAR (buffer))), ":file")))
{
if (CONSP (XCDR (buffer)))
{
Lisp_Object stderr_file;
stderr_file = XCAR (XCDR (buffer));
if (NILP (stderr_file) || EQ (Qt, stderr_file))
error_file = stderr_file;
else
error_file = Fexpand_file_name (stderr_file, Qnil);
}
buffer = XCAR (buffer);
}
/* If the buffer is (still) a list, it might be a (:file "file") spec. */
if (CONSP (buffer)
&& SYMBOLP (XCAR (buffer))
&& ! strcmp (SSDATA (SYMBOL_NAME (XCAR (buffer))), ":file"))
{
output_file = Fexpand_file_name (XCAR (XCDR (buffer)),
BVAR (current_buffer, directory));
CHECK_STRING (output_file);
buffer = Qnil;
}
if (!(EQ (buffer, Qnil)
|| EQ (buffer, Qt)
|| INTEGERP (buffer)))
{
Lisp_Object spec_buffer;
spec_buffer = buffer;
buffer = Fget_buffer_create (buffer);
/* Mention the buffer name for a better error message. */
if (NILP (buffer))
CHECK_BUFFER (spec_buffer);
CHECK_BUFFER (buffer);
}
}
else
buffer = Qnil;
/* Make sure that the child will be able to chdir to the current
buffer's current directory, or its unhandled equivalent. We
can't just have the child check for an error when it does the
chdir, since it's in a vfork.
We have to GCPRO around this because Fexpand_file_name,
Funhandled_file_name_directory, and Ffile_accessible_directory_p
might call a file name handling function. The argument list is
protected by the caller, so all we really have to worry about is
buffer. */
{
struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5;
current_dir = BVAR (current_buffer, directory);
GCPRO5 (infile, buffer, current_dir, error_file, output_file);
current_dir = Funhandled_file_name_directory (current_dir);
if (NILP (current_dir))
/* If the file name handler says that current_dir is unreachable, use
a sensible default. */
current_dir = build_string ("~/");
current_dir = expand_and_dir_to_file (current_dir, Qnil);
current_dir = Ffile_name_as_directory (current_dir);
if (NILP (Ffile_accessible_directory_p (current_dir)))
report_file_error ("Setting current directory",
Fcons (BVAR (current_buffer, directory), Qnil));
if (STRING_MULTIBYTE (infile))
infile = ENCODE_FILE (infile);
if (STRING_MULTIBYTE (current_dir))
current_dir = ENCODE_FILE (current_dir);
if (STRINGP (error_file) && STRING_MULTIBYTE (error_file))
error_file = ENCODE_FILE (error_file);
if (STRINGP (output_file) && STRING_MULTIBYTE (output_file))
output_file = ENCODE_FILE (output_file);
UNGCPRO;
}
display_p = INTERACTIVE && nargs >= 4 && !NILP (args[3]);
filefd = emacs_open (SSDATA (infile), O_RDONLY, 0);
if (filefd < 0)
{
infile = DECODE_FILE (infile);
report_file_error ("Opening process input file", Fcons (infile, Qnil));
}
if (STRINGP (output_file))
{
#ifdef DOS_NT
fd_output = emacs_open (SSDATA (output_file),
O_WRONLY | O_TRUNC | O_CREAT | O_TEXT,
S_IREAD | S_IWRITE);
#else /* not DOS_NT */
fd_output = creat (SSDATA (output_file), 0666);
#endif /* not DOS_NT */
if (fd_output < 0)
{
output_file = DECODE_FILE (output_file);
report_file_error ("Opening process output file",
Fcons (output_file, Qnil));
}
if (STRINGP (error_file) || NILP (error_file))
output_to_buffer = 0;
}
/* Search for program; barf if not found. */
{
struct gcpro gcpro1, gcpro2, gcpro3, gcpro4;
GCPRO4 (infile, buffer, current_dir, error_file);
openp (Vexec_path, args[0], Vexec_suffixes, &path, make_number (X_OK));
UNGCPRO;
}
if (NILP (path))
{
emacs_close (filefd);
report_file_error ("Searching for program", Fcons (args[0], Qnil));
}
/* If program file name starts with /: for quoting a magic name,
discard that. */
if (SBYTES (path) > 2 && SREF (path, 0) == '/'
&& SREF (path, 1) == ':')
path = Fsubstring (path, make_number (2), Qnil);
new_argv = SAFE_ALLOCA ((nargs > 4 ? nargs - 2 : 2) * sizeof *new_argv);
if (nargs > 4)
{
ptrdiff_t i;
struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5;
GCPRO5 (infile, buffer, current_dir, path, error_file);
argument_coding.dst_multibyte = 0;
for (i = 4; i < nargs; i++)
{
argument_coding.src_multibyte = STRING_MULTIBYTE (args[i]);
if (CODING_REQUIRE_ENCODING (&argument_coding))
/* We must encode this argument. */
args[i] = encode_coding_string (&argument_coding, args[i], 1);
}
UNGCPRO;
for (i = 4; i < nargs; i++)
new_argv[i - 3] = SDATA (args[i]);
new_argv[i - 3] = 0;
}
else
new_argv[1] = 0;
new_argv[0] = SDATA (path);
#ifdef MSDOS /* MW, July 1993 */
/* If we're redirecting STDOUT to a file, that file is already open
on fd_output. */
if (fd_output < 0)
{
if ((outf = egetenv ("TMPDIR")))
strcpy (tempfile = alloca (strlen (outf) + 20), outf);
else
{
tempfile = alloca (20);
*tempfile = '\0';
}
dostounix_filename (tempfile);
if (*tempfile == '\0' || tempfile[strlen (tempfile) - 1] != '/')
strcat (tempfile, "/");
strcat (tempfile, "detmp.XXX");
mktemp (tempfile);
outfilefd = creat (tempfile, S_IREAD | S_IWRITE);
if (outfilefd < 0) {
emacs_close (filefd);
report_file_error ("Opening process output file",
Fcons (build_string (tempfile), Qnil));
}
}
else
outfilefd = fd_output;
fd[0] = filefd;
fd[1] = outfilefd;
#endif /* MSDOS */
if (INTEGERP (buffer))
fd[1] = emacs_open (NULL_DEVICE, O_WRONLY, 0), fd[0] = -1;
else
{
#ifndef MSDOS
errno = 0;
if (pipe (fd) == -1)
{
emacs_close (filefd);
report_file_error ("Creating process pipe", Qnil);
}
#endif
}
{
/* child_setup must clobber environ in systems with true vfork.
Protect it from permanent change. */
register char **save_environ = environ;
register int fd1 = fd[1];
int fd_error = fd1;
if (fd_output >= 0)
fd1 = fd_output;
/* Record that we're about to create a synchronous process. */
synch_process_alive = 1;
/* These vars record information from process termination.
Clear them now before process can possibly terminate,
to avoid timing error if process terminates soon. */
synch_process_death = 0;
synch_process_retcode = 0;
synch_process_termsig = 0;
if (NILP (error_file))
fd_error = emacs_open (NULL_DEVICE, O_WRONLY, 0);
else if (STRINGP (error_file))
{
#ifdef DOS_NT
fd_error = emacs_open (SSDATA (error_file),
O_WRONLY | O_TRUNC | O_CREAT | O_TEXT,
S_IREAD | S_IWRITE);
#else /* not DOS_NT */
fd_error = creat (SSDATA (error_file), 0666);
#endif /* not DOS_NT */
}
if (fd_error < 0)
{
emacs_close (filefd);
if (fd[0] != filefd)
emacs_close (fd[0]);
if (fd1 >= 0)
emacs_close (fd1);
#ifdef MSDOS
unlink (tempfile);
#endif
if (NILP (error_file))
error_file = build_string (NULL_DEVICE);
else if (STRINGP (error_file))
error_file = DECODE_FILE (error_file);
report_file_error ("Cannot redirect stderr", Fcons (error_file, Qnil));
}
#ifdef MSDOS /* MW, July 1993 */
/* Note that on MSDOS `child_setup' actually returns the child process
exit status, not its PID, so we assign it to `synch_process_retcode'
below. */
pid = child_setup (filefd, outfilefd, fd_error, (char **) new_argv,
0, current_dir);
/* Record that the synchronous process exited and note its
termination status. */
synch_process_alive = 0;
synch_process_retcode = pid;
if (synch_process_retcode < 0) /* means it couldn't be exec'ed */
{
synchronize_system_messages_locale ();
synch_process_death = strerror (errno);
}
emacs_close (outfilefd);
if (fd_error != outfilefd)
emacs_close (fd_error);
fd1 = -1; /* No harm in closing that one! */
if (tempfile)
{
/* Since CRLF is converted to LF within `decode_coding', we
can always open a file with binary mode. */
fd[0] = emacs_open (tempfile, O_RDONLY | O_BINARY, 0);
if (fd[0] < 0)
{
unlink (tempfile);
emacs_close (filefd);
report_file_error ("Cannot re-open temporary file",
Fcons (build_string (tempfile), Qnil));
}
}
else
fd[0] = -1; /* We are not going to read from tempfile. */
#else /* not MSDOS */
#ifdef WINDOWSNT
pid = child_setup (filefd, fd1, fd_error, (char **) new_argv,
0, current_dir);
#else /* not WINDOWSNT */
block_input ();
/* vfork, and prevent local vars from being clobbered by the vfork. */
{
Lisp_Object volatile buffer_volatile = buffer;
Lisp_Object volatile coding_systems_volatile = coding_systems;
Lisp_Object volatile current_dir_volatile = current_dir;
bool volatile display_p_volatile = display_p;
bool volatile output_to_buffer_volatile = output_to_buffer;
bool volatile sa_must_free_volatile = sa_must_free;
int volatile fd1_volatile = fd1;
int volatile fd_error_volatile = fd_error;
int volatile fd_output_volatile = fd_output;
ptrdiff_t volatile sa_count_volatile = sa_count;
unsigned char const **volatile new_argv_volatile = new_argv;
pid = vfork ();
buffer = buffer_volatile;
coding_systems = coding_systems_volatile;
current_dir = current_dir_volatile;
display_p = display_p_volatile;
fd1 = fd1_volatile;
fd_error = fd_error_volatile;
fd_output = fd_output_volatile;
output_to_buffer = output_to_buffer_volatile;
sa_must_free = sa_must_free_volatile;
sa_count = sa_count_volatile;
new_argv = new_argv_volatile;
}
if (pid == 0)
{
if (fd[0] >= 0)
emacs_close (fd[0]);
#ifdef HAVE_SETSID
setsid ();
#else
setpgid (0, 0);
#endif
/* Emacs ignores SIGPIPE, but the child should not. */
signal (SIGPIPE, SIG_DFL);
child_setup (filefd, fd1, fd_error, (char **) new_argv,
0, current_dir);
}
unblock_input ();
#endif /* not WINDOWSNT */
/* The MSDOS case did this already. */
if (fd_error >= 0)
emacs_close (fd_error);
#endif /* not MSDOS */
environ = save_environ;
/* Close most of our fd's, but not fd[0]
since we will use that to read input from. */
emacs_close (filefd);
if (fd_output >= 0)
emacs_close (fd_output);
if (fd1 >= 0 && fd1 != fd_error)
emacs_close (fd1);
}
if (pid < 0)
{
if (fd[0] >= 0)
emacs_close (fd[0]);
report_file_error ("Doing vfork", Qnil);
}
if (INTEGERP (buffer))
{
if (fd[0] >= 0)
emacs_close (fd[0]);
return Qnil;
}
/* Enable sending signal if user quits below. */
call_process_exited = 0;
#if defined (MSDOS)
/* MSDOS needs different cleanup information. */
cleanup_info_tail = build_string (tempfile ? tempfile : "");
#else
cleanup_info_tail = INTEGER_TO_CONS (pid);
#endif /* not MSDOS */
record_unwind_protect (call_process_cleanup,
Fcons (Fcurrent_buffer (),
Fcons (INTEGER_TO_CONS (fd[0]),
cleanup_info_tail)));
if (BUFFERP (buffer))
Fset_buffer (buffer);
if (NILP (buffer))
{
/* If BUFFER is nil, we must read process output once and then
discard it, so setup coding system but with nil. */
setup_coding_system (Qnil, &process_coding);
process_coding.dst_multibyte = 0;
}
else
{
Lisp_Object val, *args2;
val = Qnil;
if (!NILP (Vcoding_system_for_read))
val = Vcoding_system_for_read;
else
{
if (EQ (coding_systems, Qt))
{
ptrdiff_t i;
SAFE_NALLOCA (args2, 1, nargs + 1);
args2[0] = Qcall_process;
for (i = 0; i < nargs; i++) args2[i + 1] = args[i];
coding_systems
= Ffind_operation_coding_system (nargs + 1, args2);
}
if (CONSP (coding_systems))
val = XCAR (coding_systems);
else if (CONSP (Vdefault_process_coding_system))
val = XCAR (Vdefault_process_coding_system);
else
val = Qnil;
}
Fcheck_coding_system (val);
/* In unibyte mode, character code conversion should not take
place but EOL conversion should. So, setup raw-text or one
of the subsidiary according to the information just setup. */
if (NILP (BVAR (current_buffer, enable_multibyte_characters))
&& !NILP (val))
val = raw_text_coding_system (val);
setup_coding_system (val, &process_coding);
process_coding.dst_multibyte
= ! NILP (BVAR (current_buffer, enable_multibyte_characters));
}
process_coding.src_multibyte = 0;
immediate_quit = 1;
QUIT;
if (output_to_buffer)
{
int nread;
bool first = 1;
EMACS_INT total_read = 0;
int carryover = 0;
bool display_on_the_fly = display_p;
struct coding_system saved_coding;
saved_coding = process_coding;
while (1)
{
/* Repeatedly read until we've filled as much as possible
of the buffer size we have. But don't read
less than 1024--save that for the next bufferful. */
nread = carryover;
while (nread < bufsize - 1024)
{
int this_read = emacs_read (fd[0], buf + nread,
bufsize - nread);
if (this_read < 0)
goto give_up;
if (this_read == 0)
{
process_coding.mode |= CODING_MODE_LAST_BLOCK;
break;
}
nread += this_read;
total_read += this_read;
if (display_on_the_fly)
break;
}
/* Now NREAD is the total amount of data in the buffer. */
immediate_quit = 0;
if (!NILP (buffer))
{
if (NILP (BVAR (current_buffer, enable_multibyte_characters))
&& ! CODING_MAY_REQUIRE_DECODING (&process_coding))
insert_1_both (buf, nread, nread, 0, 1, 0);
else
{ /* We have to decode the input. */
Lisp_Object curbuf;
ptrdiff_t count1 = SPECPDL_INDEX ();
XSETBUFFER (curbuf, current_buffer);
/* We cannot allow after-change-functions be run
during decoding, because that might modify the
buffer, while we rely on process_coding.produced to
faithfully reflect inserted text until we
TEMP_SET_PT_BOTH below. */
specbind (Qinhibit_modification_hooks, Qt);
decode_coding_c_string (&process_coding,
(unsigned char *) buf, nread, curbuf);
unbind_to (count1, Qnil);
if (display_on_the_fly
&& CODING_REQUIRE_DETECTION (&saved_coding)
&& ! CODING_REQUIRE_DETECTION (&process_coding))
{
/* We have detected some coding system. But,
there's a possibility that the detection was
done by insufficient data. So, we give up
displaying on the fly. */
if (process_coding.produced > 0)
del_range_2 (process_coding.dst_pos,
process_coding.dst_pos_byte,
process_coding.dst_pos
+ process_coding.produced_char,
process_coding.dst_pos_byte
+ process_coding.produced, 0);
display_on_the_fly = 0;
process_coding = saved_coding;
carryover = nread;
/* This is to make the above condition always
fails in the future. */
saved_coding.common_flags
&= ~CODING_REQUIRE_DETECTION_MASK;
continue;
}
TEMP_SET_PT_BOTH (PT + process_coding.produced_char,
PT_BYTE + process_coding.produced);
carryover = process_coding.carryover_bytes;
if (carryover > 0)
memcpy (buf, process_coding.carryover,
process_coding.carryover_bytes);
}
}
if (process_coding.mode & CODING_MODE_LAST_BLOCK)
break;
/* Make the buffer bigger as we continue to read more data,
but not past CALLPROC_BUFFER_SIZE_MAX. */
if (bufsize < CALLPROC_BUFFER_SIZE_MAX && total_read > 32 * bufsize)
if ((bufsize *= 2) > CALLPROC_BUFFER_SIZE_MAX)
bufsize = CALLPROC_BUFFER_SIZE_MAX;
if (display_p)
{
if (first)
prepare_menu_bars ();
first = 0;
redisplay_preserve_echo_area (1);
/* This variable might have been set to 0 for code
detection. In that case, we set it back to 1 because
we should have already detected a coding system. */
display_on_the_fly = 1;
}
immediate_quit = 1;
QUIT;
}
give_up: ;
Vlast_coding_system_used = CODING_ID_NAME (process_coding.id);
/* If the caller required, let the buffer inherit the
coding-system used to decode the process output. */
if (inherit_process_coding_system)
call1 (intern ("after-insert-file-set-buffer-file-coding-system"),
make_number (total_read));
}
#ifndef MSDOS
/* Wait for it to terminate, unless it already has. */
if (output_to_buffer)
wait_for_termination (pid);
else
interruptible_wait_for_termination (pid);
#endif
immediate_quit = 0;
/* Don't kill any children that the subprocess may have left behind
when exiting. */
call_process_exited = 1;
SAFE_FREE ();
unbind_to (count, Qnil);
if (synch_process_termsig)
{
const char *signame;
synchronize_system_messages_locale ();
signame = strsignal (synch_process_termsig);
if (signame == 0)
signame = "unknown";
synch_process_death = signame;
}
if (synch_process_death)
return code_convert_string_norecord (build_string (synch_process_death),
Vlocale_coding_system, 0);
return make_number (synch_process_retcode);
}
static Lisp_Object
delete_temp_file (Lisp_Object name)
{
/* Suppress jka-compr handling, etc. */
ptrdiff_t count = SPECPDL_INDEX ();
specbind (intern ("file-name-handler-alist"), Qnil);
internal_delete_file (name);
unbind_to (count, Qnil);
return Qnil;
}
DEFUN ("call-process-region", Fcall_process_region, Scall_process_region,
3, MANY, 0,
doc: /* Send text from START to END to a synchronous process running PROGRAM.
The remaining arguments are optional.
Delete the text if fourth arg DELETE is non-nil.
Insert output in BUFFER before point; t means current buffer; nil for
BUFFER means discard it; 0 means discard and don't wait; and `(:file
FILE)', where FILE is a file name string, means that it should be
written to that file (if the file already exists it is overwritten).
BUFFER can also have the form (REAL-BUFFER STDERR-FILE); in that case,
REAL-BUFFER says what to do with standard output, as above,
while STDERR-FILE says what to do with standard error in the child.
STDERR-FILE may be nil (discard standard error output),
t (mix it with ordinary output), or a file name string.
Sixth arg DISPLAY non-nil means redisplay buffer as output is inserted.
Remaining args are passed to PROGRAM at startup as command args.
If BUFFER is 0, `call-process-region' returns immediately with value nil.
Otherwise it waits for PROGRAM to terminate
and returns a numeric exit status or a signal description string.
If you quit, the process is killed with SIGINT, or SIGKILL if you quit again.
usage: (call-process-region START END PROGRAM &optional DELETE BUFFER DISPLAY &rest ARGS) */)
(ptrdiff_t nargs, Lisp_Object *args)
{
struct gcpro gcpro1;
Lisp_Object filename_string;
register Lisp_Object start, end;
ptrdiff_t count = SPECPDL_INDEX ();
/* Qt denotes we have not yet called Ffind_operation_coding_system. */
Lisp_Object coding_systems;
Lisp_Object val, *args2;
ptrdiff_t i;
Lisp_Object tmpdir;
if (STRINGP (Vtemporary_file_directory))
tmpdir = Vtemporary_file_directory;
else
{
#ifndef DOS_NT
if (getenv ("TMPDIR"))
tmpdir = build_string (getenv ("TMPDIR"));
else
tmpdir = build_string ("/tmp/");
#else /* DOS_NT */
char *outf;
if ((outf = egetenv ("TMPDIR"))
|| (outf = egetenv ("TMP"))
|| (outf = egetenv ("TEMP")))
tmpdir = build_string (outf);
else
tmpdir = Ffile_name_as_directory (build_string ("c:/temp"));
#endif
}
{
USE_SAFE_ALLOCA;
Lisp_Object pattern = Fexpand_file_name (Vtemp_file_name_pattern, tmpdir);
Lisp_Object encoded_tem = ENCODE_FILE (pattern);
char *tempfile = SAFE_ALLOCA (SBYTES (encoded_tem) + 1);
memcpy (tempfile, SDATA (encoded_tem), SBYTES (encoded_tem) + 1);
coding_systems = Qt;
#ifdef HAVE_MKSTEMP
{
int fd;
block_input ();
fd = mkstemp (tempfile);
unblock_input ();
if (fd == -1)
report_file_error ("Failed to open temporary file",
Fcons (build_string (tempfile), Qnil));
else
close (fd);
}
#else
errno = 0;
mktemp (tempfile);
if (!*tempfile)
{
if (!errno)
errno = EEXIST;
report_file_error ("Failed to open temporary file using pattern",
Fcons (pattern, Qnil));
}
#endif
filename_string = build_string (tempfile);
GCPRO1 (filename_string);
SAFE_FREE ();
}
start = args[0];
end = args[1];
/* Decide coding-system of the contents of the temporary file. */
if (!NILP (Vcoding_system_for_write))