diff options
Diffstat (limited to 'source/smbwrapper/shared.c')
| -rw-r--r-- | source/smbwrapper/shared.c | 203 |
1 files changed, 0 insertions, 203 deletions
diff --git a/source/smbwrapper/shared.c b/source/smbwrapper/shared.c deleted file mode 100644 index c7f1951f8bb..00000000000 --- a/source/smbwrapper/shared.c +++ /dev/null @@ -1,203 +0,0 @@ -/* - Unix SMB/CIFS implementation. - SMB wrapper functions - shared variables - Copyright (C) Andrew Tridgell 1998 - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2 of the License, or - (at your option) any later version. - - This program 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 General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. -*/ - -#include "includes.h" - -static int shared_fd; -static char *variables; -static int shared_size; - -/***************************************************** -setup the shared area -*******************************************************/ -void smbw_setup_shared(void) -{ - int fd; - pstring name, s; - - slprintf(name,sizeof(name)-1, "%s/smbw.XXXXXX",tmpdir()); - - fd = smb_mkstemp(name); - - if (fd == -1) goto failed; - - unlink(name); - - shared_fd = set_maxfiles(SMBW_MAX_OPEN); - - while (shared_fd && dup2(fd, shared_fd) != shared_fd) shared_fd--; - - if (shared_fd == 0) goto failed; - - close(fd); - - DEBUG(4,("created shared_fd=%d\n", shared_fd)); - - slprintf(s,sizeof(s)-1,"%d", shared_fd); - - setenv("SMBW_HANDLE", s, 1); - - return; - - failed: - perror("Failed to setup shared variable area "); - exit(1); -} - -static int locked; - -/***************************************************** -lock the shared variable area -*******************************************************/ -static void lockit(void) -{ - if (shared_fd == 0) { - char *p = getenv("SMBW_HANDLE"); - if (!p) { - DEBUG(0,("ERROR: can't get smbw shared handle\n")); - exit(1); - } - shared_fd = atoi(p); - } - if (locked==0 && - fcntl_lock(shared_fd,SMB_F_SETLKW,0,1,F_WRLCK)==False) { - DEBUG(0,("ERROR: can't get smbw shared lock (%s)\n", strerror(errno))); - exit(1); - } - locked++; -} - -/***************************************************** -unlock the shared variable area -*******************************************************/ -static void unlockit(void) -{ - locked--; - if (locked == 0) { - fcntl_lock(shared_fd,SMB_F_SETLK,0,1,F_UNLCK); - } -} - - -/***************************************************** -get a variable from the shared area -*******************************************************/ -char *smbw_getshared(const char *name) -{ - int i; - struct stat st; - char *var; - - lockit(); - - /* maybe the area has changed */ - if (fstat(shared_fd, &st)) goto failed; - - if (st.st_size != shared_size) { - var = (char *)Realloc(variables, st.st_size, True); - if (!var) goto failed; - else variables = var; - shared_size = st.st_size; - lseek(shared_fd, 0, SEEK_SET); - if (read(shared_fd, variables, shared_size) != shared_size) { - goto failed; - } - } - - unlockit(); - - i=0; - while (i < shared_size) { - char *n, *v; - int l1, l2; - - l1 = SVAL(&variables[i], 0); - l2 = SVAL(&variables[i], 2); - - n = &variables[i+4]; - v = &variables[i+4+l1]; - i += 4+l1+l2; - - if (strcmp(name,n)) { - continue; - } - return v; - } - - return NULL; - - failed: - DEBUG(0,("smbw: shared variables corrupt (%s)\n", strerror(errno))); - exit(1); - return NULL; -} - - - -/***************************************************** -set a variable in the shared area -*******************************************************/ -void smbw_setshared(const char *name, const char *val) -{ - int l1, l2; - char *var; - - /* we don't allow variable overwrite */ - if (smbw_getshared(name)) return; - - lockit(); - - l1 = strlen(name)+1; - l2 = strlen(val)+1; - - var = (char *)Realloc(variables, shared_size + l1+l2+4, True); - - if (!var) { - DEBUG(0,("out of memory in smbw_setshared\n")); - exit(1); - } - - variables = var; - - SSVAL(&variables[shared_size], 0, l1); - SSVAL(&variables[shared_size], 2, l2); - - safe_strcpy(&variables[shared_size] + 4, name, l1-1); - safe_strcpy(&variables[shared_size] + 4 + l1, val, l2-1); - - shared_size += l1+l2+4; - - lseek(shared_fd, 0, SEEK_SET); - if (write(shared_fd, variables, shared_size) != shared_size) { - DEBUG(0,("smbw_setshared failed (%s)\n", strerror(errno))); - exit(1); - } - - unlockit(); -} - - -/***************************************************************** -return true if the passed fd is the SMBW_HANDLE -*****************************************************************/ -int smbw_shared_fd(int fd) -{ - return (shared_fd && shared_fd == fd); -} |