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Diffstat (limited to 'lock.c')
| -rw-r--r-- | lock.c | 176 |
1 files changed, 176 insertions, 0 deletions
@@ -0,0 +1,176 @@ +/* $Xorg: lock.c,v 1.4 2001/02/09 02:05:59 xorgcvs Exp $ */ +/****************************************************************************** + +Copyright 1994, 1998 The Open Group + +Permission to use, copy, modify, distribute, and sell this software and its +documentation for any purpose is hereby granted without fee, provided that +the above copyright notice appear in all copies and that both that +copyright notice and this permission notice appear in supporting +documentation. + +The above copyright notice and this permission notice shall be included in +all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN +AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + +Except as contained in this notice, the name of The Open Group shall not be +used in advertising or otherwise to promote the sale, use or other dealings +in this Software without prior written authorization from The Open Group. +******************************************************************************/ + +#include "xsm.h" +#include <sys/types.h> + + +static char * +GetPath () + +{ + char *path = (char *) getenv ("SM_SAVE_DIR"); + + if (!path) + { + path = (char *) getenv ("HOME"); + if (!path) + path = "."; + } + + return (path); +} + + +Status +LockSession (session_name, write_id) + +char *session_name; +Bool write_id; + +{ + char *path; + char lock_file[PATH_MAX]; + char temp_lock_file[PATH_MAX]; + Status status; + int fd; + + path = GetPath (); + + sprintf (lock_file, "%s/.XSMlock-%s", path, session_name); + sprintf (temp_lock_file, "%s/.XSMtlock-%s", path, session_name); + + if ((fd = creat (temp_lock_file, 0444)) < 0) + return (0); + + if (write_id && + (write (fd, networkIds, strlen (networkIds)) != strlen (networkIds)) || + (write (fd, "\n", 1) != 1)) + { + close (fd); + return (0); + } + + close (fd); + + status = 1; + + if (link (temp_lock_file, lock_file) < 0) + status = 0; + + if (unlink (temp_lock_file) < 0) + status = 0; + + return (status); +} + + +void +UnlockSession (session_name) + +char *session_name; + +{ + char *path; + char lock_file[PATH_MAX]; + + path = GetPath (); + + sprintf (lock_file, "%s/.XSMlock-%s", path, session_name); + + unlink (lock_file); +} + + +char * +GetLockId (session_name) + +char *session_name; + +{ + char *path; + FILE *fp; + char lock_file[PATH_MAX]; + char buf[256]; + char *ret; + + path = GetPath (); + + sprintf (lock_file, "%s/.XSMlock-%s", path, session_name); + + if ((fp = fopen (lock_file, "r")) == NULL) + { + return (NULL); + } + + buf[0] = '\0'; + fscanf (fp, "%s\n", buf); + ret = XtNewString (buf); + + fclose (fp); + + return (ret); +} + + +Bool +CheckSessionLocked (session_name, get_id, id_ret) + +char *session_name; +Bool get_id; +char **id_ret; + +{ + if (get_id) + *id_ret = GetLockId (session_name); + + if (!LockSession (session_name, False)) + return (1); + + UnlockSession (session_name); + return (0); +} + + +void +UnableToLockSession (session_name) + +char *session_name; + +{ + /* + * We should popup a dialog here giving error. + */ + +#ifdef XKB + XkbStdBell(XtDisplay(topLevel),XtWindow(topLevel),0,XkbBI_Failure); +#else + XBell (XtDisplay (topLevel), 0); +#endif + sleep (2); + + ChooseSession (); +} |