summaryrefslogtreecommitdiffstats
path: root/kinit/wrapper.c
diff options
context:
space:
mode:
Diffstat (limited to 'kinit/wrapper.c')
-rw-r--r--kinit/wrapper.c547
1 files changed, 547 insertions, 0 deletions
diff --git a/kinit/wrapper.c b/kinit/wrapper.c
new file mode 100644
index 000000000..0248e4789
--- /dev/null
+++ b/kinit/wrapper.c
@@ -0,0 +1,547 @@
+/*
+ This file is part of the KDE libraries
+ Copyright (c) 1999 Waldo Bastian <bastian@kde.org>
+ (c) 1999 Mario Weilguni <mweilguni@sime.com>
+ (c) 2001 Lubos Lunak <l.lunak@kde.org>
+
+ This library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public
+ License version 2 as published by the Free Software Foundation.
+
+ This library 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
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public License
+ along with this library; see the file COPYING.LIB. If not, write to
+ the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ Boston, MA 02110-1301, USA.
+*/
+
+#include <config.h>
+
+#include "klauncher_cmds.h"
+
+#include <sys/types.h>
+#include <sys/param.h>
+#include <sys/socket.h>
+#include <sys/stat.h>
+#include <sys/un.h>
+
+#include <errno.h>
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <pwd.h>
+#include <signal.h>
+
+extern char **environ;
+
+static char *getDisplay()
+{
+ const char *display;
+ char *result;
+ char *screen;
+ char *colon;
+ char *i;
+/*
+ don't test for a value from qglobal.h but instead distinguish
+ Qt/X11 from Qt/Embedded by the fact that Qt/E apps have -DQWS
+ on the commandline (which in qglobal.h however triggers Q_WS_QWS,
+ but we don't want to include that here) (Simon)
+#ifdef Q_WS_X11
+ */
+#if !defined(QWS)
+ display = getenv("DISPLAY");
+#else
+ display = getenv("QWS_DISPLAY");
+#endif
+ if (!display || !*display)
+ {
+ display = ":0";
+ }
+ result = malloc(strlen(display)+1);
+ if (result == NULL)
+ return NULL;
+
+ strcpy(result, display);
+ screen = strrchr(result, '.');
+ colon = strrchr(result, ':');
+ if (screen && (screen > colon))
+ *screen = '\0';
+ while((i = strchr(result, ':')))
+ *i = '_';
+ return result;
+}
+
+/*
+ * Write 'len' bytes from 'buffer' into 'sock'.
+ * returns 0 on success, -1 on failure.
+ */
+static int write_socket(int sock, char *buffer, int len)
+{
+ ssize_t result;
+ int bytes_left = len;
+ while ( bytes_left > 0)
+ {
+ result = write(sock, buffer, bytes_left);
+ if (result > 0)
+ {
+ buffer += result;
+ bytes_left -= result;
+ }
+ else if (result == 0)
+ return -1;
+ else if ((result == -1) && (errno != EINTR) && (errno != EAGAIN))
+ return -1;
+ }
+ return 0;
+}
+
+/*
+ * Read 'len' bytes from 'sock' into 'buffer'.
+ * returns 0 on success, -1 on failure.
+ */
+static int read_socket(int sock, char *buffer, int len)
+{
+ ssize_t result;
+ int bytes_left = len;
+ while ( bytes_left > 0)
+ {
+ result = read(sock, buffer, bytes_left);
+ if (result > 0)
+ {
+ buffer += result;
+ bytes_left -= result;
+ }
+ else if (result == 0)
+ return -1;
+ else if ((result == -1) && (errno != EINTR) && (errno != EAGAIN))
+ return -1;
+ }
+ return 0;
+}
+
+static int openSocket()
+{
+ kde_socklen_t socklen;
+ int s;
+ struct sockaddr_un server;
+#define MAX_SOCK_FILE 255
+ char sock_file[MAX_SOCK_FILE + 1];
+ const char *home_dir = getenv("HOME");
+ const char *kde_home = getenv("KDEHOME");
+ char *display;
+
+ sock_file[0] = sock_file[MAX_SOCK_FILE] = 0;
+
+ if (!kde_home || !kde_home[0])
+ {
+ kde_home = "~/.kde/";
+ }
+
+ if (kde_home[0] == '~')
+ {
+ if (!home_dir || !home_dir[0])
+ {
+ fprintf(stderr, "Warning: $HOME not set!\n");
+ return -1;
+ }
+ if (strlen(home_dir) > (MAX_SOCK_FILE-100))
+ {
+ fprintf(stderr, "Warning: Home directory path too long!\n");
+ return -1;
+ }
+ kde_home++;
+ strncpy(sock_file, home_dir, MAX_SOCK_FILE);
+ }
+ strncat(sock_file, kde_home, MAX_SOCK_FILE - strlen(sock_file));
+
+ /** Strip trailing '/' **/
+ if ( sock_file[strlen(sock_file)-1] == '/')
+ sock_file[strlen(sock_file)-1] = 0;
+
+ strncat(sock_file, "/socket-", MAX_SOCK_FILE - strlen(sock_file));
+ if (gethostname(sock_file+strlen(sock_file), MAX_SOCK_FILE - strlen(sock_file) - 1) != 0)
+ {
+ perror("Warning: Could not determine hostname: ");
+ return -1;
+ }
+ sock_file[sizeof(sock_file)-1] = '\0';
+
+ /* append $DISPLAY */
+ display = getDisplay();
+ if (display == NULL)
+ {
+ fprintf(stderr, "Error: Could not determine display.\n");
+ return -1;
+ }
+
+ if (strlen(sock_file)+strlen(display)+strlen("/kdeinit_")+2 > MAX_SOCK_FILE)
+ {
+ fprintf(stderr, "Warning: Socket name will be too long.\n");
+ free (display);
+ return -1;
+ }
+ strcat(sock_file, "/kdeinit_");
+ strcat(sock_file, display);
+ free(display);
+
+ if (strlen(sock_file) >= sizeof(server.sun_path))
+ {
+ fprintf(stderr, "Warning: Path of socketfile exceeds UNIX_PATH_MAX.\n");
+ return -1;
+ }
+
+ /*
+ * create the socket stream
+ */
+ s = socket(PF_UNIX, SOCK_STREAM, 0);
+ if (s < 0)
+ {
+ perror("Warning: socket() failed: ");
+ return -1;
+ }
+
+ server.sun_family = AF_UNIX;
+ strcpy(server.sun_path, sock_file);
+ socklen = sizeof(server);
+ if(connect(s, (struct sockaddr *)&server, socklen) == -1)
+ {
+ perror("Warning: connect() failed: ");
+ close(s);
+ return -1;
+ }
+ return s;
+}
+
+static pid_t kwrapper_pid;
+static volatile pid_t got_sig; /* = 0 */
+static pid_t last_sig; /* = 0 */
+
+static void sig_pass_handler( int signo );
+static void setup_signals( void );
+
+static void setup_signal_handler( int signo, int clean )
+{
+ struct sigaction sa;
+ if( clean )
+ sa.sa_handler = SIG_DFL;
+ else
+ sa.sa_handler = sig_pass_handler;
+ sigemptyset( &sa.sa_mask );
+ sigaddset( &sa.sa_mask, signo );
+ sa.sa_flags = 0; /* don't use SA_RESTART */
+ sigaction( signo, &sa, 0 );
+}
+
+static void sig_pass_handler( int signo )
+{
+ int save_errno = errno;
+ if( signo == SIGTSTP )
+ kill( kwrapper_pid, SIGSTOP ); /* pass the signal to the real process */
+ else /* SIGTSTP wouldn't work ... I don't think is much */
+ kill( kwrapper_pid, signo ); /* of a problem */
+ got_sig = signo;
+ if( got_sig == SIGCONT )
+ setup_signals(); /* restore signals */
+ errno = save_errno;
+}
+
+static void setup_signals()
+{
+ setup_signal_handler( SIGHUP, 0 );
+ setup_signal_handler( SIGINT, 0 );
+ setup_signal_handler( SIGQUIT, 0 );
+ setup_signal_handler( SIGILL, 0 ); /* e.g. this one is probably doesn't make sense to pass */
+ setup_signal_handler( SIGABRT, 0 ); /* but anyway ... */
+ setup_signal_handler( SIGFPE, 0 );
+ /* SIGKILL can't be handled :( */
+ setup_signal_handler( SIGSEGV, 0 );
+ setup_signal_handler( SIGPIPE, 0 );
+ setup_signal_handler( SIGALRM, 0 );
+ setup_signal_handler( SIGTERM, 0 );
+ setup_signal_handler( SIGUSR1, 0 );
+ setup_signal_handler( SIGUSR2, 0 );
+ setup_signal_handler( SIGCHLD, 0 ); /* is this a good idea ??? */
+ setup_signal_handler( SIGCONT, 0 ); /* SIGSTOP can't be handled, but SIGTSTP and SIGCONT can */
+ /* SIGSTOP */ /* which should be enough */
+ setup_signal_handler( SIGTSTP, 0 );
+ setup_signal_handler( SIGTTIN, 0 ); /* is this a good idea ??? */
+ setup_signal_handler( SIGTTOU, 0 ); /* is this a good idea ??? */
+ /* some more ? */
+}
+
+static void kwrapper_run( pid_t pid )
+{
+ kwrapper_pid = pid;
+ setup_signals();
+ for(;;)
+ {
+ sleep( 1 ); /* poll and see if the real process is still alive */
+ if( got_sig != last_sig ) /* did we get a signal ? */
+ {
+ last_sig = got_sig;
+ if( got_sig == SIGCHLD )
+ ; /* nothing, ignore */
+ else if( got_sig == SIGCONT )
+ ; /* done in signal handler */
+ else /* do the default action ( most of them quit the app ) */
+ {
+ setup_signal_handler( got_sig, 1 );
+ raise( got_sig ); /* handle the signal again */
+ }
+ }
+ if( kill( pid, 0 ) < 0 )
+ break;
+ }
+ /* I'm afraid it won't be that easy to get the return value ... */
+}
+
+int main(int argc, char **argv)
+{
+ int i;
+ int wrapper = 0;
+ int ext_wrapper = 0;
+ int kwrapper = 0;
+ long arg_count;
+ long env_count;
+ klauncher_header header;
+ char *start, *p, *buffer;
+ char cwd[8192];
+ const char *tty = NULL;
+ long avoid_loops = 0;
+ const char* startup_id = NULL;
+ int sock;
+
+ long size = 0;
+
+ start = argv[0];
+ p = start + strlen(argv[0]);
+ while (--p > start)
+ {
+ if (*p == '/') break;
+ }
+ if ( p > start)
+ p++;
+ start = p;
+
+ if (strcmp(start, "kdeinit_wrapper") == 0)
+ wrapper = 1;
+ else if (strcmp(start, "kshell") == 0)
+ ext_wrapper = 1;
+ else if (strcmp(start, "kwrapper") == 0)
+ kwrapper = 1;
+ else if (strcmp(start, "kdeinit_shutdown") == 0)
+ {
+ if( argc > 1)
+ {
+ fprintf(stderr, "Usage: %s\n\n", start);
+ fprintf(stderr, "Shuts down kdeinit master process and terminates all processes spawned from it.\n");
+ exit( 255 );
+ }
+ sock = openSocket();
+ if( sock < 0 )
+ {
+ fprintf( stderr, "Error: Can't contact kdeinit!\n" );
+ exit( 255 );
+ }
+ header.cmd = LAUNCHER_TERMINATE_KDE;
+ header.arg_length = 0;
+ write_socket(sock, (char *) &header, sizeof(header));
+ read_socket(sock, (char *) &header, 1); /* wait for the socket to close */
+ return 0;
+ }
+
+ if (wrapper || ext_wrapper || kwrapper)
+ {
+ argv++;
+ argc--;
+ if (argc < 1)
+ {
+ fprintf(stderr, "Usage: %s <application> [<args>]\n", start);
+ exit(255); /* usage should be documented somewhere ... */
+ }
+ start = argv[0];
+ }
+
+ sock = openSocket();
+ if( sock < 0 ) /* couldn't contact kdeinit, start argv[ 0 ] directly */
+ {
+ execvp( argv[ 0 ], argv );
+ fprintf( stderr, "Error: Can't run %s !\n", argv[ 0 ] );
+ exit( 255 );
+ }
+
+ if( !wrapper && !ext_wrapper && !kwrapper )
+ { /* was called as a symlink */
+ avoid_loops = 1;
+#if defined(WE_ARE_KWRAPPER)
+ kwrapper = 1;
+#elif defined(WE_ARE_KSHELL)
+ ext_wrapper = 1;
+#else
+ wrapper = 1;
+#endif
+ }
+
+ arg_count = argc;
+
+ size += sizeof(long); /* Number of arguments*/
+
+ size += strlen(start)+1; /* Size of first argument. */
+
+ for(i = 1; i < argc; i++)
+ {
+ size += strlen(argv[i])+1;
+ }
+ if( wrapper )
+ {
+ size += sizeof(long); /* empty envs */
+ }
+ if (ext_wrapper || kwrapper)
+ {
+ if (!getcwd(cwd, 8192))
+ cwd[0] = '\0';
+ size += strlen(cwd)+1;
+
+ env_count = 0;
+ size += sizeof(long); /* Number of env.vars. */
+
+ for(; environ[env_count] ; env_count++)
+ {
+ int l = strlen(environ[env_count])+1;
+ size += l;
+ }
+
+ if( kwrapper )
+ {
+ tty = ttyname(1);
+ if (!tty || !isatty(2))
+ tty = "";
+ size += strlen(tty)+1;
+ }
+ }
+
+ size += sizeof( avoid_loops );
+
+ if( !wrapper )
+ {
+ startup_id = getenv( "DESKTOP_STARTUP_ID" );
+ if( startup_id == NULL )
+ startup_id = "";
+ size += strlen( startup_id ) + 1;
+ }
+
+ if (wrapper)
+ header.cmd = LAUNCHER_EXEC_NEW;
+ else if (kwrapper)
+ header.cmd = LAUNCHER_KWRAPPER;
+ else
+ header.cmd = LAUNCHER_SHELL;
+ header.arg_length = size;
+ write_socket(sock, (char *) &header, sizeof(header));
+
+ buffer = (char *) malloc(size);
+ if (buffer == NULL)
+ {
+ fprintf(stderr, "Error: malloc() failed.");
+ exit(255);
+ }
+ p = buffer;
+
+ memcpy(p, &arg_count, sizeof(arg_count));
+ p += sizeof(arg_count);
+
+ memcpy(p, start, strlen(start)+1);
+ p += strlen(start)+1;
+
+ for(i = 1; i < argc; i++)
+ {
+ memcpy(p, argv[i], strlen(argv[i])+1);
+ p += strlen(argv[i])+1;
+ }
+
+ if( wrapper )
+ {
+ long dummy = 0;
+ memcpy(p, &dummy, sizeof(dummy)); /* empty envc */
+ p+= sizeof( dummy );
+ }
+ if (ext_wrapper || kwrapper)
+ {
+ memcpy(p, cwd, strlen(cwd)+1);
+ p+= strlen(cwd)+1;
+
+ memcpy(p, &env_count, sizeof(env_count));
+ p+= sizeof(env_count);
+
+ for(i = 0; i < env_count; i++)
+ {
+ int l = strlen(environ[i])+1;
+ memcpy(p, environ[i], l);
+ p += l;
+ }
+
+ if( kwrapper )
+ {
+ memcpy(p, tty, strlen(tty)+1);
+ p+=strlen(tty)+1;
+ }
+ }
+
+ memcpy( p, &avoid_loops, sizeof( avoid_loops ));
+ p += sizeof( avoid_loops );
+
+ if( !wrapper )
+ {
+ memcpy(p, startup_id, strlen(startup_id)+1);
+ p+= strlen(startup_id)+1;
+ }
+
+ if( p - buffer != size ) /* should fail only if you change this source and do */
+ /* a stupid mistake, it should be assert() actually */
+ {
+ fprintf(stderr, "Oops. Invalid format.\n");
+ exit(255);
+ }
+
+ write_socket(sock, buffer, size);
+ free( buffer );
+
+ if (read_socket(sock, (char *) &header, sizeof(header))==-1)
+ {
+ fprintf(stderr, "Communication error with KInit.\n");
+ exit(255);
+ }
+
+ if (header.cmd == LAUNCHER_OK)
+ {
+ long pid;
+ buffer = (char *) malloc(header.arg_length);
+ if (buffer == NULL)
+ {
+ fprintf(stderr, "Error: malloc() failed\n");
+ exit(255);
+ }
+ read_socket(sock, buffer, header.arg_length);
+ pid = *((long *) buffer);
+ if( !kwrapper ) /* kwrapper shouldn't print any output */
+ printf("Launched ok, pid = %ld\n", pid);
+ else
+ kwrapper_run( pid );
+ }
+ else if (header.cmd == LAUNCHER_ERROR)
+ {
+ fprintf(stderr, "KInit could not launch '%s'.\n", start);
+ exit(255);
+ }
+ else
+ {
+ fprintf(stderr, "Unexpected response from KInit (response = %ld).\n", header.cmd);
+ exit(255);
+ }
+ exit(0);
+}
generated by cgit v1.2.1 (git 2.18.0) at 2024-12-27 06:37:39 +0000