add coprocess facility

tools/shmtest.c

@@ -0,0 +1,198 @@
+/* shmtest.c
+ *
+ */
+
+#include <config.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <signal.h>
+#include <unistd.h>
+#ifdef HAVE_SYS_IPC_H
+  #include <sys/ipc.h>
+#endif
+#ifdef HAVE_SYS_SHM_H
+  #include <sys/shm.h>
+#endif
+#include "util.h"
+#include "ttyio.h"
+#include "i18n.h"
+
+
+static int serverpid = -1;
+
+static void
+my_usage(void)
+{
+    fprintf(stderr, "usage: shmtest gpg-command-line\n");
+    exit(1);
+}
+
+const char *
+strusage( int level )
+{
+    return default_strusage(level);
+}
+
+static void
+i18n_init(void)
+{
+  #ifdef ENABLE_NLS
+    #ifdef HAVE_LC_MESSAGES
+       setlocale( LC_MESSAGES, "" );
+    #else
+       setlocale( LC_ALL, "" );
+    #endif
+    bindtextdomain( PACKAGE, G10_LOCALEDIR );
+    textdomain( PACKAGE );
+  #endif
+}
+
+
+static void
+do_get_string( int mode, const char *keyword, byte *area, size_t areasize )
+{
+    size_t n, len;
+    char *p=NULL;
+    int yes;
+
+    n = area[0] << 8 | area[1];
+    /* fixme: do some sanity checks here */
+    if( mode == 1 )
+	p = tty_get( keyword );
+    else if( mode == 3 )
+	p = tty_get_hidden( keyword );
+    else
+	yes = tty_get_answer_is_yes( keyword );
+    if( p ) {
+	len = strlen(p);
+	memcpy( area+n+2, p, len );
+	area[n] = len >> 8;
+	area[n+1] = len;
+	m_free(p);
+    }
+    else { /* bool */
+	area[n] = 0;
+	area[n+1] = 1;
+	area[n+2] = yes;
+    }
+    area[3] = 1; /* we should better use a semaphore */
+    kill( serverpid, SIGUSR1 );
+}
+
+
+
+int
+main(int argc, char **argv)
+{
+    void  *area = NULL;
+    size_t areasize = 4096;
+    int shm_id = -1;
+    FILE *fp;
+    char buf[200];
+    char *p, *p2;
+    size_t n;
+    int i;
+
+    log_set_name("shmtest");
+    i18n_init();
+  #ifndef USE_SHM_COPROCESSING
+    log_info("SHM_COPRPOCESSING is not available\n");
+  #else
+    if( argc < 1 )
+	my_usage();
+
+  #if 0
+    shm_ID = atoi( argv[1] );
+    pool = shmat( shm_ID, 0, 0 );
+    if( pool == (void*)-1 )
+	log_fatal("shmat of %d failed: %s\n", shm_ID, strerror(errno));
+    log_info("attached to %p  id=%d\n", pool, shm_ID );
+    getchar();
+  #endif
+
+    for(n=0,i=1; i < argc; i++ )
+	n += strlen(argv[i]) + 1;
+    p = m_alloc( 100 + n );
+    strcpy( p, "../g10/gpg --status-fd 1 --run-as-shm-coprocess 0");
+    for(i=1; i < argc; i++ ) {
+	strcat(p, " " );
+	strcat(p, argv[i] );
+    }
+
+    fp = popen( p, "r" );
+    m_free( p );
+    if( !fp )
+	log_error("popen failed: %s\n", strerror(errno));
+
+    while ( fgets (buf, sizeof (buf) - 1, fp ) != NULL ) {
+	size_t len = strlen(buf);
+	if( len >= 9 && !memcmp( buf, "[GNUPG:] ", 9 ) ) {
+	    int word=0;
+	    int is_info = 0, is_get = 0;
+
+	    for( p = strtok(buf+9, " \n"); p ; p = strtok(NULL, " \n")) {
+		word++;
+		if( word==1 && !strcmp(p,"SHM_INFO") ) {
+		    if( !area )
+			is_info=1;
+		    else
+			log_error("duplicate SHM_INFO ignored\n" );
+		}
+		else if( is_info && (p2 = strchr(p, '=' )) ) {
+		    int val;
+		    *p2++ = 0;
+		    val = atoi(p2); /* should be atou() for some values */
+		    if( !strcmp(p, "pv" ) ) {
+			if( atoi(p2) != 1 )
+			    log_fatal("invalid protocol version %d\n", val );
+			is_info = 2;
+		    }
+		    else if( !strcmp(p, "pid" ) )
+			serverpid = val;
+		    else if( !strcmp(p, "shmid" ) )
+			shm_id = val;
+		}
+		else if( word == 1 && !strcmp(p,"SHM_GET") )
+		    is_get = 1;
+		else if( word == 1 && !strcmp(p,"SHM_GET_BOOL") )
+		    is_get = 2;
+		else if( word == 1 && !strcmp(p,"SHM_GET_HIDDEN") )
+		    is_get = 3;
+		else if( word == 2 && is_get )	{
+		    do_get_string( is_get, p, area, areasize );
+		    break;
+		}
+		else if( word == 1 )
+		    log_info("Status: %s\n", p);
+	    }
+	    if( is_info ) {
+		if( is_info < 2 )
+		    log_fatal("SHM info without protocol version\n");
+		if( serverpid == -1 )
+		    log_fatal("SHM info without server's pid\n");
+		if( shm_id == -1 )
+		    log_fatal("SHM info without id\n");
+		log_info("Shared memory info: server=%d shm_id=%d\n",
+							    serverpid, shm_id);
+		area = shmat( shm_id, 0, 0 );
+		if( area == (void*)-1 )
+		    log_fatal("attach to shared memory failed: %s\n",
+							    strerror(errno));
+	    }
+	}
+	else
+	    fputs (buf, stdout);
+    }
+
+
+    if( pclose(fp) )
+	log_error("pclose failed\n");
+
+    return 0;
+  #endif
+}
+
+
+