/* Asynchronous subprocess control for GNU Emacs.
-Copyright (C) 1985-1988, 1993-1996, 1998-1999, 2001-2013 Free Software
-Foundation, Inc.
+Copyright (C) 1985-1988, 1993-1996, 1998-1999, 2001-2014
+ Free Software Foundation, Inc.
This file is part of GNU Emacs.
struct timespec *, void *);
#endif
+/* Work around GCC 4.7.0 bug with strict overflow checking; see
+ <http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52904>.
+ These lines can be removed once the GCC bug is fixed. */
+#if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3)
+# pragma GCC diagnostic ignored "-Wstrict-overflow"
+#endif
+
+Lisp_Object Qeuid, Qegid, Qcomm, Qstate, Qppid, Qpgrp, Qsess, Qttname, Qtpgid;
+Lisp_Object Qminflt, Qmajflt, Qcminflt, Qcmajflt, Qutime, Qstime, Qcstime;
+Lisp_Object Qcutime, Qpri, Qnice, Qthcount, Qstart, Qvsize, Qrss, Qargs;
+Lisp_Object Quser, Qgroup, Qetime, Qpcpu, Qpmem, Qtime, Qctime;
+Lisp_Object QCname, QCtype;
+\f
+/* True if keyboard input is on hold, zero otherwise. */
+
+static bool kbd_is_on_hold;
+
+/* Nonzero means don't run process sentinels. This is used
+ when exiting. */
+bool inhibit_sentinels;
+
+#ifdef subprocesses
+
#ifndef SOCK_CLOEXEC
# define SOCK_CLOEXEC 0
#endif
# define socket(domain, type, protocol) process_socket (domain, type, protocol)
#endif
-/* Work around GCC 4.7.0 bug with strict overflow checking; see
- <http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52904>.
- These lines can be removed once the GCC bug is fixed. */
-#if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3)
-# pragma GCC diagnostic ignored "-Wstrict-overflow"
-#endif
-
-Lisp_Object Qeuid, Qegid, Qcomm, Qstate, Qppid, Qpgrp, Qsess, Qttname, Qtpgid;
-Lisp_Object Qminflt, Qmajflt, Qcminflt, Qcmajflt, Qutime, Qstime, Qcstime;
-Lisp_Object Qcutime, Qpri, Qnice, Qthcount, Qstart, Qvsize, Qrss, Qargs;
-Lisp_Object Quser, Qgroup, Qetime, Qpcpu, Qpmem, Qtime, Qctime;
-Lisp_Object QCname, QCtype;
-\f
-/* True if keyboard input is on hold, zero otherwise. */
-
-static bool kbd_is_on_hold;
-
-/* Nonzero means don't run process sentinels. This is used
- when exiting. */
-bool inhibit_sentinels;
-
-#ifdef subprocesses
-
Lisp_Object Qprocessp;
static Lisp_Object Qrun, Qstop, Qsignal;
static Lisp_Object Qopen, Qclosed, Qconnect, Qfailed, Qlisten;
int len;
} datagram_address[FD_SETSIZE];
#define DATAGRAM_CHAN_P(chan) (datagram_address[chan].sa != 0)
-#define DATAGRAM_CONN_P(proc) (PROCESSP (proc) && datagram_address[XPROCESS (proc)->infd].sa != 0)
+#define DATAGRAM_CONN_P(proc) \
+ (PROCESSP (proc) && \
+ XPROCESS (proc)->infd >= 0 && \
+ datagram_address[XPROCESS (proc)->infd].sa != 0)
#else
#define DATAGRAM_CHAN_P(chan) (0)
#define DATAGRAM_CONN_P(proc) (0)
else
obj = name;
- /* Now obj should be either a buffer object or a process object.
- */
+ /* Now obj should be either a buffer object or a process object. */
if (BUFFERP (obj))
{
+ if (NILP (BVAR (XBUFFER (obj), name)))
+ error ("Attempt to get process for a dead buffer");
proc = Fget_buffer_process (obj);
if (NILP (proc))
- error ("Buffer %s has no process", SDATA (BVAR (XBUFFER (obj), name)));
+ error ("Buffer %s has no process", SDATA (BVAR (XBUFFER (obj), name)));
}
else
{
DEFUN ("process-buffer", Fprocess_buffer, Sprocess_buffer,
1, 1, 0,
doc: /* Return the buffer PROCESS is associated with.
-Output from PROCESS is inserted in this buffer unless PROCESS has a filter. */)
+The default process filter inserts output from PROCESS into this buffer. */)
(register Lisp_Object process)
{
CHECK_PROCESS (process);
The filter gets two arguments: the process and the string of output.
The string argument is normally a multibyte string, except:
-- if the process' input coding system is no-conversion or raw-text,
+- if the process's input coding system is no-conversion or raw-text,
it is a unibyte string (the non-converted input), or else
- if `default-enable-multibyte-characters' is nil, it is a unibyte
string (the result of converting the decoded input multibyte
CHECK_PROCESS (process);
p = XPROCESS (process);
- /* Don't signal an error if the process' input file descriptor
+ /* Don't signal an error if the process's input file descriptor
is closed. This could make debugging Lisp more difficult,
for example when doing something like
tem = Qnil;
GCPRO4 (name, program, buffer, current_dir);
- openp (Vexec_path, program, Vexec_suffixes, &tem, make_number (X_OK));
+ openp (Vexec_path, program, Vexec_suffixes, &tem,
+ make_number (X_OK), false);
UNGCPRO;
if (NILP (tem))
report_file_error ("Searching for program", program);
bool pty_flag = 0;
char pty_name[PTY_NAME_SIZE];
Lisp_Object lisp_pty_name = Qnil;
+ sigset_t oldset;
inchannel = outchannel = -1;
setup_process_coding_systems (process);
block_input ();
- block_child_signal ();
+ block_child_signal (&oldset);
#ifndef WINDOWSNT
/* vfork, and prevent local vars from being clobbered by the vfork. */
signal (SIGINT, SIG_DFL);
signal (SIGQUIT, SIG_DFL);
+#ifdef SIGPROF
+ signal (SIGPROF, SIG_DFL);
+#endif
/* Emacs ignores SIGPIPE, but the child should not. */
signal (SIGPIPE, SIG_DFL);
/* Stop blocking SIGCHLD in the child. */
- unblock_child_signal ();
+ unblock_child_signal (&oldset);
if (pty_flag)
child_setup_tty (xforkout);
p->alive = 1;
/* Stop blocking in the parent. */
- unblock_child_signal ();
+ unblock_child_signal (&oldset);
unblock_input ();
if (pid < 0)
case AF_LOCAL:
{
struct sockaddr_un *sockun = (struct sockaddr_un *) sa;
- for (i = 0; i < sizeof (sockun->sun_path); i++)
- if (sockun->sun_path[i] == 0)
- break;
- return make_unibyte_string (sockun->sun_path, i);
+ ptrdiff_t name_length = len - offsetof (struct sockaddr_un, sun_path);
+ /* If the first byte is NUL, the name is a Linux abstract
+ socket name, and the name can contain embedded NULs. If
+ it's not, we have a NUL-terminated string. Be careful not
+ to walk past the end of the object looking for the name
+ terminator, however. */
+ if (name_length > 0 && sockun->sun_path[0] != '\0')
+ {
+ const char *terminator
+ = memchr (sockun->sun_path, '\0', name_length);
+
+ if (terminator)
+ name_length = terminator - (const char *) sockun->sun_path;
+ }
+
+ return make_unibyte_string (sockun->sun_path, name_length);
}
#endif
default:
is the server process, CLIENT is the new process for the connection,
and MESSAGE is a string.
-:plist PLIST -- Install PLIST as the new process' initial plist.
+:plist PLIST -- Install PLIST as the new process's initial plist.
:server QLEN -- if QLEN is non-nil, create a server process for the
specified FAMILY, SERVICE, and connection type (stream or datagram).
for the connection with the following parameters:
- The client's process name is constructed by concatenating the server
-process' NAME and a client identification string.
+process's NAME and a client identification string.
- If the FILTER argument is non-nil, the client process will not get a
separate process buffer; otherwise, the client's process buffer is a newly
-created buffer named after the server process' BUFFER name or process
+created buffer named after the server process's BUFFER name or process
NAME concatenated with the client identification string.
- The connection type and the process filter and sentinel parameters are
-inherited from the server process' TYPE, FILTER and SENTINEL.
-- The client process' contact info is set according to the client's
+inherited from the server process's TYPE, FILTER and SENTINEL.
+- The client process's contact info is set according to the client's
addressing information (typically an IP address and a port number).
-- The client process' plist is initialized from the server's plist.
+- The client process's plist is initialized from the server's plist.
Notice that the FILTER and SENTINEL args are never used directly by
the server process. Also, the BUFFER argument is not used directly by
the server process, but via the optional :log function, accepted (and
-failed) connections may be logged in the server process' buffer.
+failed) connections may be logged in the server process's buffer.
The original argument list, modified with the actual connection
information, is available via the `process-contact' function.
DEFUN ("accept-process-output", Faccept_process_output, Saccept_process_output,
0, 4, 0,
doc: /* Allow any pending output from subprocesses to be read by Emacs.
-It is read into the process' buffers or given to their filter functions.
+It is given to their filter functions.
Non-nil arg PROCESS means do not return until some output has been received
from PROCESS.
DEFUN ("internal-default-process-filter", Finternal_default_process_filter,
Sinternal_default_process_filter, 2, 2, 0,
- doc: /* Function used as default process filter. */)
+ doc: /* Function used as default process filter.
+This inserts the process's output into its buffer, if there is one.
+Otherwise it discards the output. */)
(Lisp_Object proc, Lisp_Object text)
{
struct Lisp_Process *p;
(Lisp_Object process)
{
Lisp_Object proc;
- struct coding_system *coding;
+ struct coding_system *coding = NULL;
+ int outfd;
if (DATAGRAM_CONN_P (process))
return process;
proc = get_process (process);
- coding = proc_encode_coding_system[XPROCESS (proc)->outfd];
+ outfd = XPROCESS (proc)->outfd;
+ if (outfd >= 0)
+ coding = proc_encode_coding_system[outfd];
/* Make sure the process is really alive. */
if (XPROCESS (proc)->raw_status_new)
if (! EQ (XPROCESS (proc)->status, Qrun))
error ("Process %s not running", SDATA (XPROCESS (proc)->name));
- if (CODING_REQUIRE_FLUSHING (coding))
+ if (coding && CODING_REQUIRE_FLUSHING (coding))
{
coding->mode |= CODING_MODE_LAST_BLOCK;
send_process (proc, "", 0, Qnil);
}
else
{
- int old_outfd = XPROCESS (proc)->outfd;
+ struct Lisp_Process *p = XPROCESS (proc);
+ int old_outfd = p->outfd;
int new_outfd;
#ifdef HAVE_SHUTDOWN
for communication with the subprocess, call shutdown to cause EOF.
(In some old system, shutdown to socketpair doesn't work.
Then we just can't win.) */
- if (EQ (XPROCESS (proc)->type, Qnetwork)
- || XPROCESS (proc)->infd == old_outfd)
+ if (EQ (p->type, Qnetwork)
+ || p->infd == old_outfd)
shutdown (old_outfd, 1);
#endif
- close_process_fd (&XPROCESS (proc)->open_fd[WRITE_TO_SUBPROCESS]);
+ close_process_fd (&p->open_fd[WRITE_TO_SUBPROCESS]);
new_outfd = emacs_open (NULL_DEVICE, O_WRONLY, 0);
if (new_outfd < 0)
report_file_error ("Opening null device", Qnil);
- XPROCESS (proc)->open_fd[WRITE_TO_SUBPROCESS] = new_outfd;
- XPROCESS (proc)->outfd = new_outfd;
+ p->open_fd[WRITE_TO_SUBPROCESS] = new_outfd;
+ p->outfd = new_outfd;
if (!proc_encode_coding_system[new_outfd])
proc_encode_coding_system[new_outfd]
= xmalloc (sizeof (struct coding_system));
- *proc_encode_coding_system[new_outfd]
- = *proc_encode_coding_system[old_outfd];
- memset (proc_encode_coding_system[old_outfd], 0,
- sizeof (struct coding_system));
+ if (old_outfd >= 0)
+ {
+ *proc_encode_coding_system[new_outfd]
+ = *proc_encode_coding_system[old_outfd];
+ memset (proc_encode_coding_system[old_outfd], 0,
+ sizeof (struct coding_system));
+ }
+ else
+ setup_coding_system (p->encode_coding_system,
+ proc_encode_coding_system[new_outfd]);
}
return process;
}
lib_child_handler (sig);
#ifdef NS_IMPL_GNUSTEP
- /* NSTask in GNUStep sets its child handler each time it is called.
+ /* NSTask in GNUstep sets its child handler each time it is called.
So we must re-set ours. */
catch_child_signal();
#endif
DEFUN ("internal-default-process-sentinel", Finternal_default_process_sentinel,
Sinternal_default_process_sentinel, 2, 2, 0,
- doc: /* Function used as default sentinel for processes. */)
+ doc: /* Function used as default sentinel for processes.
+This inserts a status message into the process's buffer, if there is one. */)
(Lisp_Object proc, Lisp_Object msg)
{
Lisp_Object buffer, symbol;
return system_process_attributes (pid);
}
+#ifdef subprocesses
/* Arrange to catch SIGCHLD if this hasn't already been arranged.
Invoke this after init_process_emacs, and after glib and/or GNUstep
futz with the SIGCHLD handler, but before Emacs forks any children.
catch_child_signal (void)
{
struct sigaction action, old_action;
+ sigset_t oldset;
emacs_sigaction_init (&action, deliver_child_signal);
- block_child_signal ();
+ block_child_signal (&oldset);
sigaction (SIGCHLD, &action, &old_action);
eassert (! (old_action.sa_flags & SA_SIGINFO));
= (old_action.sa_handler == SIG_DFL || old_action.sa_handler == SIG_IGN
? dummy_handler
: old_action.sa_handler);
- unblock_child_signal ();
+ unblock_child_signal (&oldset);
}
+#endif /* subprocesses */
\f
/* This is not called "init_process" because that is the name of a
DEFSYM (Qcutime, "cutime");
DEFSYM (Qcstime, "cstime");
DEFSYM (Qctime, "ctime");
+#ifdef subprocesses
DEFSYM (Qinternal_default_process_sentinel,
"internal-default-process-sentinel");
DEFSYM (Qinternal_default_process_filter,
"internal-default-process-filter");
+#endif
DEFSYM (Qpri, "pri");
DEFSYM (Qnice, "nice");
DEFSYM (Qthcount, "thcount");
HCoop / bpt / emacs.git / blobdiff