539 lines
10 KiB
C
539 lines
10 KiB
C
/* $Xorg: saveutil.c,v 1.5 2001/02/09 02:06:01 xorgcvs Exp $ */
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/******************************************************************************
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Copyright 1993, 1998 The Open Group
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Permission to use, copy, modify, distribute, and sell this software and its
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documentation for any purpose is hereby granted without fee, provided that
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the above copyright notice appear in all copies and that both that
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copyright notice and this permission notice appear in supporting
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documentation.
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
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AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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Except as contained in this notice, the name of The Open Group shall not be
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used in advertising or otherwise to promote the sale, use or other dealings
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in this Software without prior written authorization from The Open Group.
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******************************************************************************/
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/* $XFree86: xc/programs/xsm/saveutil.c,v 1.5 2001/01/17 23:46:31 dawes Exp $ */
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#include "xsm.h"
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#include "log.h"
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#include "saveutil.h"
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#include "info.h"
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static char session_save_file[PATH_MAX];
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void
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set_session_save_file_name(const char *session_name)
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{
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const char *p;
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p = getenv ("SM_SAVE_DIR");
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if (!p)
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{
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p = getenv ("HOME");
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if (!p)
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p = ".";
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}
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snprintf (session_save_file, sizeof(session_save_file),
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"%s/.XSM-%s", p, session_name);
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}
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int
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ReadSave(const char *session_name, char **sm_id)
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{
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char *buf;
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int buflen;
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char *p;
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PendingClient *c = NULL;
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Prop *prop = NULL;
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PropValue *val;
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FILE *f;
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int state, i;
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int version_number;
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f = fopen(session_save_file, "r");
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if(!f) {
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if (verbose)
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printf("No session save file.\n");
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*sm_id = NULL;
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return 0;
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}
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if (verbose)
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printf("Reading session save file...\n");
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buf = NULL;
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buflen = 0;
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/* Read version # */
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getnextline(&buf, &buflen, f);
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if((p = strchr(buf, '\n'))) *p = '\0';
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version_number = atoi (buf);
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if (version_number > SAVEFILE_VERSION)
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{
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if (verbose)
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printf("Unsupported version number of session save file.\n");
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*sm_id = NULL;
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if (buf)
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free (buf);
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return 0;
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}
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/* Read SM's id */
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getnextline(&buf, &buflen, f);
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if((p = strchr(buf, '\n'))) *p = '\0';
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*sm_id = XtNewString(buf);
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/* Read number of clients running in the last session */
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if (version_number >= 2)
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{
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getnextline(&buf, &buflen, f);
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if((p = strchr(buf, '\n'))) *p = '\0';
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num_clients_in_last_session = atoi (buf);
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}
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state = 0;
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while(getnextline(&buf, &buflen, f)) {
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if((p = strchr(buf, '\n'))) *p = '\0';
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for(p = buf; *p && isspace(*p); p++) /* LOOP */;
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if(*p == '#') continue;
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if(!*p)
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{
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if (version_number >= 3 &&
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ListCount (PendingList) == num_clients_in_last_session)
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{
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state = 5;
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break;
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}
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else
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{
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state = 0;
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continue;
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}
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}
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if(!isspace(buf[0])) {
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switch(state) {
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case 0:
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c = (PendingClient *)XtMalloc(sizeof *c);
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if(!c) nomem();
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c->clientId = XtNewString(p);
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c->clientHostname = NULL; /* set in next state */
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c->props = ListInit();
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if(!c->props) nomem();
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if(!ListAddLast(PendingList, (char *)c)) nomem();
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state = 1;
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break;
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case 1:
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c->clientHostname = XtNewString(p);
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state = 2;
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break;
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case 2:
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case 4:
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prop = (Prop *)XtMalloc(sizeof *prop);
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if(!prop) nomem();
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prop->name = XtNewString(p);
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prop->values = ListInit();
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if(!prop->values) nomem();
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prop->type = NULL;
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if(!ListAddLast(c->props, (char *)prop)) nomem();
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state = 3;
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break;
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case 3:
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prop->type = XtNewString(p);
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state = 4;
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break;
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default:
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fprintf(stderr, "state %d\n", state);
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fprintf(stderr,
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"Corrupt save file line ignored:\n%s\n", buf);
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continue;
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}
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} else {
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if (state != 4) {
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fprintf(stderr, "Corrupt save file line ignored:\n%s\n", buf);
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continue;
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}
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val = (PropValue *)XtMalloc(sizeof *val);
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if(!val) nomem();
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if (strcmp (prop->type, SmCARD8) == 0)
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{
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val->length = 1;
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val->value = (XtPointer) XtMalloc (1);
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*((char *)(val->value)) = atoi (p);
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}
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else
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{
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val->length = strlen(p);
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val->value = XtNewString(p);
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}
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if(!ListAddLast(prop->values, (char *)val)) nomem();
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}
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}
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/* Read commands for non-session aware clients */
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if (state == 5)
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{
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String strbuf;
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int bufsize = 0;
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getnextline(&buf, &buflen, f);
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if((p = strchr(buf, '\n'))) *p = '\0';
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non_session_aware_count = atoi (buf);
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if (non_session_aware_count > 0)
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{
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non_session_aware_clients = (char **) malloc (
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non_session_aware_count * sizeof (char *));
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for (i = 0; i < non_session_aware_count; i++)
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{
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getnextline(&buf, &buflen, f);
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if((p = strchr(buf, '\n'))) *p = '\0';
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non_session_aware_clients[i] = (char *) malloc (
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strlen (buf) + 2);
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strcpy (non_session_aware_clients[i], buf);
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bufsize += (strlen (buf) + 1);
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}
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strbuf = (String) malloc (bufsize + 1);
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strbuf[0] = '\0';
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for (i = 0; i < non_session_aware_count; i++)
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{
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strcat (strbuf, non_session_aware_clients[i]);
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strcat (strbuf, "\n");
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}
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XtVaSetValues (manualRestartCommands,
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XtNstring, strbuf,
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NULL);
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free ((char *) strbuf);
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}
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}
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fclose(f);
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if (buf)
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free (buf);
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return 1;
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}
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static void
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SaveClient(FILE *f, ClientRec *client)
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{
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List *pl;
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fprintf (f, "%s\n", client->clientId);
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fprintf (f, "%s\n", client->clientHostname);
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for (pl = ListFirst (client->props); pl; pl = ListNext (pl))
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{
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Prop *pprop = (Prop *) pl->thing;
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List *pj, *vl;
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PropValue *pval;
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fprintf (f, "%s\n", pprop->name);
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fprintf (f, "%s\n", pprop->type);
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if (strcmp (pprop->type, SmCARD8) == 0)
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{
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char *card8;
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int value;
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vl = ListFirst (pprop->values);
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pval = (PropValue *) vl->thing;
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card8 = pval->value;
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value = *card8;
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fprintf(f, "\t%d\n", value);
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}
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else
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{
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for (pj = ListFirst (pprop->values); pj; pj = ListNext (pj))
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{
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pval = (PropValue *) pj->thing;
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fprintf (f, "\t%s\n", (char *)pval->value);
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}
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}
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}
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fprintf (f, "\n");
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}
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void
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WriteSave(const char *sm_id)
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{
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ClientRec *client;
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FILE *f;
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List *cl;
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String commands;
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char *p, *c;
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int count;
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f = fopen (session_save_file, "w");
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if (!f)
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{
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char msg[256];
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snprintf (msg, sizeof(msg), "%s: Error creating session save file %s",
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Argv[0], session_save_file);
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add_log_text (msg);
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perror (msg);
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}
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else
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{
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fprintf (f, "%d\n", SAVEFILE_VERSION);
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fprintf (f, "%s\n", sm_id);
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count = 0;
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for (cl = ListFirst (RunningList); cl; cl = ListNext (cl))
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{
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client = (ClientRec *) cl->thing;
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if (client->restartHint != SmRestartNever)
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count++;
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}
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count += ListCount (RestartAnywayList);
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fprintf (f, "%d\n", count);
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if (count == 0)
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fprintf (f, "\n");
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for (cl = ListFirst (RunningList); cl; cl = ListNext (cl))
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{
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client = (ClientRec *) cl->thing;
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if (client->restartHint == SmRestartNever)
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continue;
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SaveClient (f, client);
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}
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for (cl = ListFirst (RestartAnywayList); cl; cl = ListNext (cl))
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{
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client = (ClientRec *) cl->thing;
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SaveClient (f, client);
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}
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/* Save the non-session aware clients */
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XtVaGetValues (manualRestartCommands,
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XtNstring, &commands,
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NULL);
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p = c = commands;
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count = 0;
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while (*p)
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{
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if (*p == '\n')
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{
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if (p != c)
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count++;
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c = p + 1;
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}
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p++;
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}
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if (p != c)
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count++;
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fprintf (f, "%d\n", count);
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p = c = commands;
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while (*p)
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{
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if (*p == '\n')
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{
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if (p != c)
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{
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*p = '\0';
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fprintf (f, "%s\n", c);
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*p = '\n';
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}
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c = p + 1;
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}
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p++;
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}
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if (p != c)
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fprintf (f, "%s\n", c);
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fclose (f);
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}
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}
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Status
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DeleteSession(const char *session_name)
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{
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char *buf;
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int buflen;
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char *p;
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const char *dir;
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FILE *f;
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int state;
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int foundDiscard;
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char filename[256];
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int version_number;
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dir = getenv ("SM_SAVE_DIR");
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if (!dir)
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{
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dir = getenv ("HOME");
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if (!dir)
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dir = ".";
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}
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snprintf (filename, sizeof(filename), "%s/.XSM-%s", dir, session_name);
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f = fopen(filename, "r");
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if(!f) {
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return (0);
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}
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buf = NULL;
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buflen = 0;
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/* Read version # */
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getnextline(&buf, &buflen, f);
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if((p = strchr(buf, '\n'))) *p = '\0';
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version_number = atoi (buf);
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if (version_number > SAVEFILE_VERSION)
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{
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if (verbose)
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printf("Can't delete session save file - incompatible version.\n");
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if (buf)
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free (buf);
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return (0);
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}
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/* Skip SM's id */
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getnextline(&buf, &buflen, f);
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/* Skip number of clients running in the last session */
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if (version_number >= 2)
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getnextline(&buf, &buflen, f);
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state = 0;
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foundDiscard = 0;
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while(getnextline(&buf, &buflen, f)) {
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if((p = strchr(buf, '\n'))) *p = '\0';
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for(p = buf; *p && isspace(*p); p++) /* LOOP */;
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if(*p == '#') continue;
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if(!*p) {
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state = 0;
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foundDiscard = 0;
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continue;
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}
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if(!isspace(buf[0])) {
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switch(state) {
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case 0:
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state = 1;
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break;
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case 1:
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state = 2;
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break;
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case 2:
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case 4:
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if (strcmp (p, SmDiscardCommand) == 0)
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foundDiscard = 1;
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state = 3;
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break;
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case 3:
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state = 4;
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break;
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default:
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continue;
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}
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} else {
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if (state != 4) {
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continue;
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}
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if (foundDiscard)
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{
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execute_system_command (p); /* Discard Command */
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foundDiscard = 0;
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}
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}
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}
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fclose(f);
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if (buf)
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free (buf);
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return ((remove (filename) == -1) ? 0 : 1);
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}
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Bool
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getnextline(char **pbuf, int *plen, FILE *f)
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{
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int c;
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int i;
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i = 0;
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while(1) {
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if(i+2 > *plen) {
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if(*plen) *plen *= 2;
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else *plen = BUFSIZ;
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if(*pbuf) *pbuf = (char *) realloc(*pbuf, *plen + 1);
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else *pbuf = (char *) malloc(*plen + 1);
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}
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c = getc(f);
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if(c == EOF) break;
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(*pbuf)[i++] = c;
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if(c == '\n') break;
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}
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(*pbuf)[i] = '\0';
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return i;
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}
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