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 2, or (at your option)
+the Free Software Foundation; either version 3, or (at your option)
any later version.
GNU Emacs is distributed in the hope that it will be useful,
#include "lisp.h"
#include "commands.h"
#include "buffer.h"
-#include "charset.h"
+#include "character.h"
#include "ccl.h"
#include "coding.h"
#include "composite.h"
#include "syssignal.h"
#include "systty.h"
#include "blockinput.h"
+#include "frame.h"
+#include "termhooks.h"
#ifdef MSDOS
#include "msdos.h"
Lisp_Object Vshell_file_name;
-Lisp_Object Vprocess_environment;
+Lisp_Object Vprocess_environment, Vinitial_environment;
#ifdef DOS_NT
Lisp_Object Qbuffer_file_type;
#endif /* DOS_NT */
-/* True iff we are about to fork off a synchronous process or if we
+/* True if we are about to fork off a synchronous process or if we
are waiting for it. */
int synch_process_alive;
/* If synch_process_death is zero,
this is exit code of synchronous subprocess. */
int synch_process_retcode;
+
\f
/* Clean up when exiting Fcall_process.
On MSDOS, delete the temporary file on any kind of termination.
/* Nonzero if this is termination due to exit. */
static int call_process_exited;
+EXFUN (Fgetenv_internal, 2);
+
#ifndef VMS /* VMS version is in vmsproc.c. */
static Lisp_Object
if (nargs >= 5)
{
int must_encode = 0;
+ Lisp_Object coding_attrs;
for (i = 4; i < nargs; i++)
CHECK_STRING (args[i]);
else
val = Qnil;
}
+ val = coding_inherit_eol_type (val, Qnil);
setup_coding_system (Fcheck_coding_system (val), &argument_coding);
- if (argument_coding.common_flags & CODING_ASCII_INCOMPATIBLE_MASK)
- setup_coding_system (Qraw_text, &argument_coding);
- if (argument_coding.eol_type == CODING_EOL_UNDECIDED)
- argument_coding.eol_type = system_eol_type;
+ 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);
+ }
}
}
{
argument_coding.src_multibyte = STRING_MULTIBYTE (args[i]);
if (CODING_REQUIRE_ENCODING (&argument_coding))
- {
- /* We must encode this argument. */
- args[i] = encode_coding_string (args[i], &argument_coding, 1);
- if (argument_coding.type == coding_type_ccl)
- setup_ccl_program (&(argument_coding.spec.ccl.encoder), Qnil);
- }
+ /* We must encode this argument. */
+ args[i] = encode_coding_string (&argument_coding, args[i], 1);
new_argv[i - 3] = SDATA (args[i]);
}
UNGCPRO;
else
val = Qnil;
}
- setup_coding_system (Fcheck_coding_system (val), &process_coding);
+ 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 (current_buffer->enable_multibyte_characters)
&& !NILP (val))
- setup_raw_text_coding_system (&process_coding);
+ val = raw_text_coding_system (val);
+ setup_coding_system (val, &process_coding);
}
- process_coding.src_multibyte = 0;
- process_coding.dst_multibyte
- = (BUFFERP (buffer)
- ? ! NILP (XBUFFER (buffer)->enable_multibyte_characters)
- : ! NILP (current_buffer->enable_multibyte_characters));
immediate_quit = 1;
QUIT;
int carryover = 0;
int display_on_the_fly = display_p;
struct coding_system saved_coding;
- int pt_orig = PT, pt_byte_orig = PT_BYTE;
- int inserted;
saved_coding = process_coding;
- if (process_coding.composing != COMPOSITION_DISABLED)
- coding_allocate_composition_data (&process_coding, PT);
while (1)
{
/* Repeatedly read until we've filled as much as possible
if (!NILP (buffer))
{
- if (! CODING_MAY_REQUIRE_DECODING (&process_coding))
+ if (NILP (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. */
- int size;
- char *decoding_buf;
-
- repeat_decoding:
- size = decoding_buffer_size (&process_coding, nread);
- decoding_buf = (char *) xmalloc (size);
-
- /* We can't use the macro CODING_REQUIRE_DETECTION
- because it always returns nonzero if the coding
- system requires EOL detection. Here, we have to
- check only whether or not the coding system
- requires text-encoding detection. */
- if (process_coding.type == coding_type_undecided)
- {
- detect_coding (&process_coding, buf, nread);
- if (process_coding.composing != COMPOSITION_DISABLED)
- /* We have not yet allocated the composition
- data because the coding type was undecided. */
- coding_allocate_composition_data (&process_coding, PT);
- }
- if (process_coding.cmp_data)
- process_coding.cmp_data->char_offset = PT;
-
- decode_coding (&process_coding, buf, decoding_buf,
- nread, size);
+ Lisp_Object curbuf;
+ XSETBUFFER (curbuf, current_buffer);
+ decode_coding_c_string (&process_coding, buf, nread,
+ curbuf);
if (display_on_the_fly
- && saved_coding.type == coding_type_undecided
- && process_coding.type != coding_type_undecided)
+ && 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 try the code
- detection again with more data. */
- xfree (decoding_buf);
+ 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.type = coding_type_no_conversion;
+ saved_coding.common_flags
+ &= ~CODING_REQUIRE_DETECTION_MASK;
continue;
}
- if (process_coding.produced > 0)
- insert_1_both (decoding_buf, process_coding.produced_char,
- process_coding.produced, 0, 1, 0);
- xfree (decoding_buf);
-
- if (process_coding.result == CODING_FINISH_INCONSISTENT_EOL)
- {
- Lisp_Object eol_type, coding;
-
- if (process_coding.eol_type == CODING_EOL_CR)
- {
- /* CRs have been replaced with LFs. Undo
- that in the text inserted above. */
- unsigned char *p;
-
- move_gap_both (PT, PT_BYTE);
-
- p = BYTE_POS_ADDR (pt_byte_orig);
- for (; p < GPT_ADDR; ++p)
- if (*p == '\n')
- *p = '\r';
- }
- else if (process_coding.eol_type == CODING_EOL_CRLF)
- {
- /* CR LFs have been replaced with LFs. Undo
- that by inserting CRs in front of LFs in
- the text inserted above. */
- EMACS_INT bytepos, old_pt, old_pt_byte, nCR;
-
- old_pt = PT;
- old_pt_byte = PT_BYTE;
- nCR = 0;
-
- for (bytepos = PT_BYTE - 1;
- bytepos >= pt_byte_orig;
- --bytepos)
- if (FETCH_BYTE (bytepos) == '\n')
- {
- EMACS_INT charpos = BYTE_TO_CHAR (bytepos);
- TEMP_SET_PT_BOTH (charpos, bytepos);
- insert_1_both ("\r", 1, 1, 0, 1, 0);
- ++nCR;
- }
-
- TEMP_SET_PT_BOTH (old_pt + nCR, old_pt_byte + nCR);
- }
-
- /* Set the coding system symbol to that for
- Unix-like EOL. */
- eol_type = Fget (saved_coding.symbol, Qeol_type);
- if (VECTORP (eol_type)
- && ASIZE (eol_type) == 3
- && SYMBOLP (AREF (eol_type, CODING_EOL_LF)))
- coding = AREF (eol_type, CODING_EOL_LF);
- else
- coding = saved_coding.symbol;
-
- process_coding.symbol = coding;
- process_coding.eol_type = CODING_EOL_LF;
- process_coding.mode
- &= ~CODING_MODE_INHIBIT_INCONSISTENT_EOL;
- }
-
- nread -= process_coding.consumed;
- carryover = nread;
+ TEMP_SET_PT_BOTH (PT + process_coding.produced_char,
+ PT_BYTE + process_coding.produced);
+ carryover = process_coding.carryover_bytes;
if (carryover > 0)
/* As CARRYOVER should not be that large, we had
better avoid overhead of bcopy. */
- BCOPY_SHORT (buf + process_coding.consumed, buf,
- carryover);
- if (process_coding.result == CODING_FINISH_INSUFFICIENT_CMP)
- {
- /* The decoding ended because of insufficient data
- area to record information about composition.
- We must try decoding with additional data area
- before reading more output for the process. */
- coding_allocate_composition_data (&process_coding, PT);
- goto repeat_decoding;
- }
+ BCOPY_SHORT (process_coding.carryover, buf,
+ process_coding.carryover_bytes);
}
}
}
give_up: ;
- if (!NILP (buffer)
- && process_coding.cmp_data)
- {
- coding_restore_composition (&process_coding, Fcurrent_buffer ());
- coding_free_composition_data (&process_coding);
- }
-
- {
- int post_read_count = SPECPDL_INDEX ();
-
- record_unwind_protect (save_excursion_restore, save_excursion_save ());
- inserted = PT - pt_orig;
- TEMP_SET_PT_BOTH (pt_orig, pt_byte_orig);
- if (SYMBOLP (process_coding.post_read_conversion)
- && !NILP (Ffboundp (process_coding.post_read_conversion)))
- call1 (process_coding.post_read_conversion, make_number (inserted));
-
- Vlast_coding_system_used = process_coding.symbol;
-
- /* 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));
-
- unbind_to (post_read_count, Qnil);
- }
+ 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));
}
/* Wait for it to terminate, unless it already has. */
static int relocate_fd ();
+static char **
+add_env (char **env, char **new_env, char *string)
+{
+ char **ep;
+ int ok = 1;
+ if (string == NULL)
+ return new_env;
+
+ /* See if this string duplicates any string already in the env.
+ If so, don't put it in.
+ When an env var has multiple definitions,
+ we keep the definition that comes first in process-environment. */
+ for (ep = env; ok && ep != new_env; ep++)
+ {
+ char *p = *ep, *q = string;
+ while (ok)
+ {
+ if (*q != *p)
+ break;
+ if (*q == 0)
+ /* The string is a lone variable name; keep it for now, we
+ will remove it later. It is a placeholder for a
+ variable that is not to be included in the environment. */
+ break;
+ if (*q == '=')
+ ok = 0;
+ p++, q++;
+ }
+ }
+ if (ok)
+ *new_env++ = string;
+ return new_env;
+}
+
/* This is the last thing run in a newly forked inferior
either synchronous or asynchronous.
Copy descriptors IN, OUT and ERR as descriptors 0, 1 and 2.
/* Note that use of alloca is always safe here. It's obvious for systems
that do not have true vfork or that have true (stack) alloca.
- If using vfork and C_ALLOCA it is safe because that changes
- the superior's static variables as if the superior had done alloca
- and will be cleaned up in the usual way. */
+ If using vfork and C_ALLOCA (when Emacs used to include
+ src/alloca.c) it is safe because that changes the superior's
+ static variables as if the superior had done alloca and will be
+ cleaned up in the usual way. */
{
register char *temp;
register int i;
temp[--i] = 0;
}
- /* Set `env' to a vector of the strings in Vprocess_environment. */
+ /* Set `env' to a vector of the strings in the environment. */
{
register Lisp_Object tem;
register char **new_env;
+ char **p, **q;
register int new_length;
-
+ Lisp_Object display = Qnil;
+
new_length = 0;
+
for (tem = Vprocess_environment;
- CONSP (tem) && STRINGP (XCAR (tem));
- tem = XCDR (tem))
- new_length++;
+ CONSP (tem) && STRINGP (XCAR (tem));
+ tem = XCDR (tem))
+ {
+ if (strncmp (SDATA (XCAR (tem)), "DISPLAY", 7) == 0
+ && (SDATA (XCAR (tem)) [7] == '\0'
+ || SDATA (XCAR (tem)) [7] == '='))
+ /* DISPLAY is specified in process-environment. */
+ display = Qt;
+ new_length++;
+ }
+
+ /* If not provided yet, use the frame's DISPLAY. */
+ if (NILP (display))
+ {
+ Lisp_Object tmp = Fframe_parameter (selected_frame, Qdisplay);
+ if (!STRINGP (tmp) && CONSP (Vinitial_environment))
+ /* If still not found, Look for DISPLAY in Vinitial_environment. */
+ tmp = Fgetenv_internal (build_string ("DISPLAY"),
+ Vinitial_environment);
+ if (STRINGP (tmp))
+ {
+ display = tmp;
+ new_length++;
+ }
+ }
/* new_length + 2 to include PWD and terminating 0. */
env = new_env = (char **) alloca ((new_length + 2) * sizeof (char *));
-
/* If we have a PWD envvar, pass one down,
but with corrected value. */
- if (getenv ("PWD"))
+ if (egetenv ("PWD"))
*new_env++ = pwd_var;
+
+ if (STRINGP (display))
+ {
+ int vlen = strlen ("DISPLAY=") + strlen (SDATA (display)) + 1;
+ char *vdata = (char *) alloca (vlen);
+ strcpy (vdata, "DISPLAY=");
+ strcat (vdata, SDATA (display));
+ new_env = add_env (env, new_env, vdata);
+ }
- /* Copy the Vprocess_environment strings into new_env. */
+ /* Overrides. */
for (tem = Vprocess_environment;
CONSP (tem) && STRINGP (XCAR (tem));
tem = XCDR (tem))
+ new_env = add_env (env, new_env, SDATA (XCAR (tem)));
+
+ *new_env = 0;
+
+ /* Remove variable names without values. */
+ p = q = env;
+ while (*p != 0)
{
- char **ep = env;
- char *string = (char *) SDATA (XCAR (tem));
- /* See if this string duplicates any string already in the env.
- If so, don't put it in.
- When an env var has multiple definitions,
- we keep the definition that comes first in process-environment. */
- for (; ep != new_env; ep++)
- {
- char *p = *ep, *q = string;
- while (1)
- {
- if (*q == 0)
- /* The string is malformed; might as well drop it. */
- goto duplicate;
- if (*q != *p)
- break;
- if (*q == '=')
- goto duplicate;
- p++, q++;
- }
- }
- *new_env++ = string;
- duplicate: ;
+ while (*q != 0 && strchr (*q, '=') == NULL)
+ q++;
+ *p = *q++;
+ if (*p != 0)
+ p++;
}
- *new_env = 0;
}
+
+
#ifdef WINDOWSNT
prepare_standard_handles (in, out, err, handles);
set_process_dir (SDATA (current_dir));
}
static int
-getenv_internal (var, varlen, value, valuelen)
+getenv_internal_1 (var, varlen, value, valuelen, env)
char *var;
int varlen;
char **value;
int *valuelen;
+ Lisp_Object env;
{
- Lisp_Object scan;
-
- for (scan = Vprocess_environment; CONSP (scan); scan = XCDR (scan))
+ for (; CONSP (env); env = XCDR (env))
{
- Lisp_Object entry;
-
- entry = XCAR (scan);
+ Lisp_Object entry = XCAR (env);
if (STRINGP (entry)
- && SBYTES (entry) > varlen
- && SREF (entry, varlen) == '='
+ && SBYTES (entry) >= varlen
#ifdef WINDOWSNT
/* NT environment variables are case insensitive. */
&& ! strnicmp (SDATA (entry), var, varlen)
#endif /* not WINDOWSNT */
)
{
- *value = (char *) SDATA (entry) + (varlen + 1);
- *valuelen = SBYTES (entry) - (varlen + 1);
+ if (SBYTES (entry) > varlen && SREF (entry, varlen) == '=')
+ {
+ *value = (char *) SDATA (entry) + (varlen + 1);
+ *valuelen = SBYTES (entry) - (varlen + 1);
+ return 1;
+ }
+ else if (SBYTES (entry) == varlen)
+ {
+ /* Lone variable names in Vprocess_environment mean that
+ variable should be removed from the environment. */
+ *value = NULL;
+ return 1;
+ }
+ }
+ }
+ return 0;
+}
+
+static int
+getenv_internal (var, varlen, value, valuelen, frame)
+ char *var;
+ int varlen;
+ char **value;
+ int *valuelen;
+ Lisp_Object frame;
+{
+ /* Try to find VAR in Vprocess_environment first. */
+ if (getenv_internal_1 (var, varlen, value, valuelen,
+ Vprocess_environment))
+ return *value ? 1 : 0;
+
+ /* For DISPLAY try to get the values from the frame or the initial env. */
+ if (strcmp (var, "DISPLAY") == 0)
+ {
+ Lisp_Object display
+ = Fframe_parameter (NILP (frame) ? selected_frame : frame, Qdisplay);
+ if (STRINGP (display))
+ {
+ *value = (char *) SDATA (display);
+ *valuelen = SBYTES (display);
return 1;
}
+ /* If still not found, Look for DISPLAY in Vinitial_environment. */
+ if (getenv_internal_1 (var, varlen, value, valuelen,
+ Vinitial_environment))
+ return *value ? 1 : 0;
}
return 0;
}
-DEFUN ("getenv-internal", Fgetenv_internal, Sgetenv_internal, 1, 1, 0,
- doc: /* Return the value of environment variable VAR, as a string.
-VAR should be a string. Value is nil if VAR is undefined in the environment.
-This function consults the variable `process-environment' for its value. */)
- (var)
- Lisp_Object var;
+DEFUN ("getenv-internal", Fgetenv_internal, Sgetenv_internal, 1, 2, 0,
+ doc: /* Get the value of environment variable VARIABLE.
+VARIABLE should be a string. Value is nil if VARIABLE is undefined in
+the environment. Otherwise, value is a string.
+
+This function searches `process-environment' for VARIABLE. If it is
+not found there, then it continues the search in the environment list
+of the selected frame.
+
+If optional parameter ENV is a list, then search this list instead of
+`process-environment', and return t when encountering a negative entry.
+
+If it is a frame, then this function will ignore `process-environment' and
+will simply look up the variable in that frame's environment. */)
+ (variable, env)
+ Lisp_Object variable, env;
{
char *value;
int valuelen;
- CHECK_STRING (var);
- if (getenv_internal (SDATA (var), SBYTES (var),
- &value, &valuelen))
+ CHECK_STRING (variable);
+ if (CONSP (env))
+ {
+ if (getenv_internal_1 (SDATA (variable), SBYTES (variable),
+ &value, &valuelen, env))
+ return value ? make_string (value, valuelen) : Qt;
+ else
+ return Qnil;
+ }
+ else if (getenv_internal (SDATA (variable), SBYTES (variable),
+ &value, &valuelen, env))
return make_string (value, valuelen);
else
return Qnil;
}
-/* A version of getenv that consults process_environment, easily
- callable from C. */
+/* A version of getenv that consults the Lisp environment lists,
+ easily callable from C. */
char *
egetenv (var)
char *var;
char *value;
int valuelen;
- if (getenv_internal (var, strlen (var), &value, &valuelen))
+ if (getenv_internal (var, strlen (var), &value, &valuelen, Qnil))
return value;
else
return 0;
{
char *dir = getenv ("TMPDIR");
Vtemp_file_name_pattern
- = Fexpand_file_name (build_string ("emacsXXXXXX"),
- build_string (dir));
+ = Fexpand_file_name (build_string ("emacsXXXXXX"),
+ build_string (dir));
}
else
Vtemp_file_name_pattern = build_string ("/tmp/emacsXXXXXX");
}
void
-set_process_environment ()
+set_initial_environment ()
{
register char **envp;
-
- Vprocess_environment = Qnil;
#ifndef CANNOT_DUMP
if (initialized)
#endif
- for (envp = environ; *envp; envp++)
- Vprocess_environment = Fcons (build_string (*envp),
- Vprocess_environment);
+ {
+ for (envp = environ; *envp; envp++)
+ Vprocess_environment = Fcons (build_string (*envp),
+ Vprocess_environment);
+ /* Ideally, the `copy' shouldn't be necessary, but it seems it's frequent
+ to use `delete' and friends on process-environment. */
+ Vinitial_environment = Fcopy_sequence (Vprocess_environment);
+ }
}
void
This is used by `call-process-region'. */);
/* This variable is initialized in init_callproc. */
+ DEFVAR_LISP ("initial-environment", &Vinitial_environment,
+ doc: /* List of environment variables inherited from the parent process.
+Each element should be a string of the form ENVVARNAME=VALUE.
+The elements must normally be decoded (using `locale-coding-system') for use. */);
+ Vinitial_environment = Qnil;
+
DEFVAR_LISP ("process-environment", &Vprocess_environment,
- doc: /* List of environment variables for subprocesses to inherit.
+ doc: /* List of overridden environment variables for subprocesses to inherit.
Each element should be a string of the form ENVVARNAME=VALUE.
+
+Entries in this list take precedence to those in the frame-local
+environments. Therefore, let-binding `process-environment' is an easy
+way to temporarily change the value of an environment variable,
+irrespective of where it comes from. To use `process-environment' to
+remove an environment variable, include only its name in the list,
+without "=VALUE".
+
+This variable is set to nil when Emacs starts.
+
If multiple entries define the same variable, the first one always
takes precedence.
-The environment which Emacs inherits is placed in this variable
-when Emacs starts.
+
Non-ASCII characters are encoded according to the initial value of
-`locale-coding-system', i.e. the elements must normally be decoded for use.
+`locale-coding-system', i.e. the elements must normally be decoded for
+use.
+
See `setenv' and `getenv'. */);
+ Vprocess_environment = Qnil;
#ifndef VMS
defsubr (&Scall_process);
HCoop / bpt / emacs.git / blobdiff