/*
- * Unix SMB/Netbios implementation. Version 1.9. SMB parameters and setup
+ * Unix SMB/CIFS implementation.
+ * SMB parameters and setup
* Copyright (C) Andrew Tridgell 1992-1998 Modified by Jeremy Allison 1995.
- *
+ *
* 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)
+ * Software Foundation; either version 3 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.
+ * this program; if not, see <http://www.gnu.org/licenses/>.
*/
-#include "includes.h"
-
-static int gotalarm;
-
-/***************************************************************
- Signal function to tell us we timed out.
-****************************************************************/
-
-static void gotalarm_sig(void)
-{
- gotalarm = 1;
-}
-
-/***************************************************************
- Lock or unlock a fd for a known lock type. Abandon after waitsecs
- seconds.
-****************************************************************/
-
-BOOL do_file_lock(int fd, int waitsecs, int type)
-{
- SMB_STRUCT_FLOCK lock;
- int ret;
-
- gotalarm = 0;
- CatchSignal(SIGALRM, SIGNAL_CAST gotalarm_sig);
-
- lock.l_type = type;
- lock.l_whence = SEEK_SET;
- lock.l_start = 0;
- lock.l_len = 1;
- lock.l_pid = 0;
-
- alarm(waitsecs);
- ret = fcntl(fd, SMB_F_SETLKW, &lock);
- alarm(0);
- CatchSignal(SIGALRM, SIGNAL_CAST SIG_DFL);
-
- if (gotalarm) {
- DEBUG(0, ("do_file_lock: failed to %s file.\n",
- type == F_UNLCK ? "unlock" : "lock"));
- return False;
- }
-
- return (ret == 0);
-}
-
-
-/***************************************************************
- Lock an fd. Abandon after waitsecs seconds.
-****************************************************************/
-
-BOOL file_lock(int fd, int type, int secs, int *plock_depth)
-{
- if (fd < 0)
- return False;
-
- (*plock_depth)++;
-
- if ((*plock_depth) == 0)
- {
- if (!do_file_lock(fd, secs, type)) {
- DEBUG(10,("file_lock: locking file failed, error = %s.\n",
- strerror(errno)));
- return False;
- }
- }
-
- return True;
-}
+#include "replace.h"
+#include "lib/util_file.h"
+#include "lib/util/debug.h"
+#include "lib/util/samba_util.h"
+#include "lib/util/sys_rw.h"
+#include "lib/sys_popen.h"
+#include "lib/async_req/async_sock.h"
+#include "lib/util/tevent_unix.h"
+
+struct file_pload_state {
+ struct tevent_context *ev;
+ size_t maxsize;
+ int fd;
+ uint8_t *buf;
+};
-/***************************************************************
- Unlock an fd. Abandon after waitsecs seconds.
-****************************************************************/
+static int file_pload_state_destructor(struct file_pload_state *s);
+static void file_pload_readable(struct tevent_req *subreq);
-BOOL file_unlock(int fd, int *plock_depth)
+struct tevent_req *file_pload_send(TALLOC_CTX *mem_ctx,
+ struct tevent_context *ev,
+ const char *syscmd, size_t maxsize)
{
- BOOL ret=True;
+ struct tevent_req *req, *subreq;
+ struct file_pload_state *state;
- if(*plock_depth == 1)
- ret = do_file_lock(fd, 5, F_UNLCK);
+ req = tevent_req_create(mem_ctx, &state, struct file_pload_state);
+ if (req == NULL) {
+ return NULL;
+ }
+ state->ev = ev;
+ state->maxsize = maxsize;
- (*plock_depth)--;
+ state->fd = sys_popen(syscmd);
+ if (state->fd == -1) {
+ tevent_req_error(req, errno);
+ return tevent_req_post(req, ev);
+ }
+ talloc_set_destructor(state, file_pload_state_destructor);
- if(!ret)
- DEBUG(10,("file_unlock: unlocking file failed, error = %s.\n",
- strerror(errno)));
- return ret;
+ subreq = wait_for_read_send(state, state->ev, state->fd, false);
+ if (tevent_req_nomem(subreq, req)) {
+ return tevent_req_post(req, ev);
+ }
+ tevent_req_set_callback(subreq, file_pload_readable, req);
+ return req;
}
-/***************************************************************
- locks a file for enumeration / modification.
- update to be set = True if modification is required.
-****************************************************************/
-
-void *startfilepwent(char *pfile, char *s_readbuf, int bufsize,
- int *file_lock_depth, BOOL update)
+static int file_pload_state_destructor(struct file_pload_state *s)
{
- FILE *fp = NULL;
-
- if (!*pfile)
- {
- DEBUG(0, ("startfilepwent: No file set\n"));
- return (NULL);
- }
- DEBUG(10, ("startfilepwent: opening file %s\n", pfile));
-
- fp = sys_fopen(pfile, update ? "r+b" : "rb");
-
- if (fp == NULL) {
- DEBUG(0, ("startfilepwent: unable to open file %s\n", pfile));
- return NULL;
- }
-
- /* Set a buffer to do more efficient reads */
- setvbuf(fp, s_readbuf, _IOFBF, bufsize);
+ if (s->fd != -1) {
+ sys_pclose(s->fd);
+ s->fd = -1;
+ }
+ return 0;
+}
+
+static void file_pload_readable(struct tevent_req *subreq)
+{
+ struct tevent_req *req = tevent_req_callback_data(
+ subreq, struct tevent_req);
+ struct file_pload_state *state = tevent_req_data(
+ req, struct file_pload_state);
+ uint8_t buf[1024];
+ uint8_t *tmp;
+ ssize_t nread;
+ size_t bufsize;
+ int err;
+ bool ok;
+
+ ok = wait_for_read_recv(subreq, &err);
+ TALLOC_FREE(subreq);
+ if (!ok) {
+ tevent_req_error(req, err);
+ return;
+ }
- if (!file_lock(fileno(fp), (update ? F_WRLCK : F_RDLCK), 5, file_lock_depth))
- {
- DEBUG(0, ("startfilepwent: unable to lock file %s\n", pfile));
- fclose(fp);
- return NULL;
- }
+ nread = sys_read(state->fd, buf, sizeof(buf));
+ if (nread == -1) {
+ tevent_req_error(req, errno);
+ return;
+ }
+ if (nread == 0) {
+ tevent_req_done(req);
+ return;
+ }
- /* Make sure it is only rw by the owner */
- chmod(pfile, 0600);
+ bufsize = talloc_get_size(state->buf);
- /* We have a lock on the file. */
- return (void *)fp;
-}
+ if (((bufsize + nread) < bufsize) ||
+ ((bufsize + nread + 1) < bufsize)) {
+ /* overflow */
+ tevent_req_error(req, EMSGSIZE);
+ return;
+ }
-/***************************************************************
- End enumeration of the file.
-****************************************************************/
-void endfilepwent(void *vp, int *file_lock_depth)
-{
- FILE *fp = (FILE *)vp;
+ if ((state->maxsize != 0) && ((bufsize + nread) > state->maxsize)) {
+ tevent_req_error(req, EMSGSIZE);
+ return;
+ }
- file_unlock(fileno(fp), file_lock_depth);
- fclose(fp);
- DEBUG(7, ("endfilepwent: closed file.\n"));
-}
+ tmp = talloc_realloc(state, state->buf, uint8_t, bufsize + nread + 1);
+ if (tevent_req_nomem(tmp, req)) {
+ return;
+ }
+ state->buf = tmp;
-/*************************************************************************
- Return the current position in the file list as an SMB_BIG_UINT.
- This must be treated as an opaque token.
-*************************************************************************/
-SMB_BIG_UINT getfilepwpos(void *vp)
-{
- return (SMB_BIG_UINT)sys_ftell((FILE *)vp);
-}
+ memcpy(state->buf + bufsize, buf, nread);
+ state->buf[bufsize+nread] = '\0';
-/*************************************************************************
- Set the current position in the file list from an SMB_BIG_UINT.
- This must be treated as an opaque token.
-*************************************************************************/
-BOOL setfilepwpos(void *vp, SMB_BIG_UINT tok)
-{
- return !sys_fseek((FILE *)vp, (SMB_OFF_T)tok, SEEK_SET);
+ subreq = wait_for_read_send(state, state->ev, state->fd, false);
+ if (tevent_req_nomem(subreq, req)) {
+ return;
+ }
+ tevent_req_set_callback(subreq, file_pload_readable, req);
}
-/*************************************************************************
- gets a line out of a file.
- line is of format "xxxx:xxxxxx:xxxxx:".
- lines with "#" at the front are ignored.
-*************************************************************************/
-int getfileline(void *vp, char *linebuf, int linebuf_size)
+int file_pload_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
+ uint8_t **buf)
{
- /* Static buffers we will return. */
- FILE *fp = (FILE *)vp;
- unsigned char c;
- unsigned char *p;
- size_t linebuf_len;
-
- if (fp == NULL)
- {
- DEBUG(0,("getfileline: Bad file pointer.\n"));
- return -1;
- }
-
- /*
- * Scan the file, a line at a time.
- */
- while (!feof(fp))
- {
- linebuf[0] = '\0';
-
- fgets(linebuf, linebuf_size, fp);
- if (ferror(fp))
- {
- return -1;
- }
+ struct file_pload_state *state = tevent_req_data(
+ req, struct file_pload_state);
+ int err;
- /*
- * Check if the string is terminated with a newline - if not
- * then we must keep reading and discard until we get one.
- */
-
- linebuf_len = strlen(linebuf);
- if (linebuf_len == 0)
- {
- linebuf[0] = '\0';
- return 0;
- }
-
- if (linebuf[linebuf_len - 1] != '\n')
- {
- c = '\0';
- while (!ferror(fp) && !feof(fp))
- {
- c = fgetc(fp);
- if (c == '\n')
- {
- break;
- }
- }
- }
- else
- {
- linebuf[linebuf_len - 1] = '\0';
- }
-
-#ifdef DEBUG_PASSWORD
- DEBUG(100, ("getfileline: got line |%s|\n", linebuf));
-#endif
- if ((linebuf[0] == 0) && feof(fp))
- {
- DEBUG(4, ("getfileline: end of file reached\n"));
- return 0;
- }
-
- if (linebuf[0] == '#' || linebuf[0] == '\0')
- {
- DEBUG(6, ("getfileline: skipping comment or blank line\n"));
- continue;
- }
-
- p = (unsigned char *) strchr_m(linebuf, ':');
- if (p == NULL)
- {
- DEBUG(0, ("getfileline: malformed line entry (no :)\n"));
- continue;
- }
- return linebuf_len;
+ if (tevent_req_is_unix_error(req, &err)) {
+ return err;
}
- return -1;
-}
+ *buf = talloc_move(mem_ctx, &state->buf);
+ tevent_req_received(req);
-/****************************************************************************
-read a line from a file with possible \ continuation chars.
-Blanks at the start or end of a line are stripped.
-The string will be allocated if s2 is NULL
-****************************************************************************/
-char *fgets_slash(char *s2,int maxlen,XFILE *f)
-{
- char *s=s2;
- int len = 0;
- int c;
- BOOL start_of_line = True;
-
- if (x_feof(f))
- return(NULL);
-
- if (maxlen <2) return(NULL);
-
- if (!s2)
- {
- maxlen = MIN(maxlen,8);
- s = (char *)malloc(maxlen);
- }
-
- if (!s) return(NULL);
-
- *s = 0;
-
- while (len < maxlen-1)
- {
- c = x_getc(f);
- switch (c)
- {
- case '\r':
- break;
- case '\n':
- while (len > 0 && s[len-1] == ' ')
- {
- s[--len] = 0;
- }
- if (len > 0 && s[len-1] == '\\')
- {
- s[--len] = 0;
- start_of_line = True;
- break;
- }
- return(s);
- case EOF:
- if (len <= 0 && !s2)
- SAFE_FREE(s);
- return(len>0?s:NULL);
- case ' ':
- if (start_of_line)
- break;
- default:
- start_of_line = False;
- s[len++] = c;
- s[len] = 0;
- }
- if (!s2 && len > maxlen-3)
- {
- char *t;
-
- maxlen *= 2;
- t = (char *)Realloc(s,maxlen);
- if (!t) {
- DEBUG(0,("fgets_slash: failed to expand buffer!\n"));
- SAFE_FREE(s);
- return(NULL);
- } else s = t;
- }
- }
- return(s);
+ return 0;
}
+/**
+ Load from a pipe into memory.
+**/
-/****************************************************************************
-load from a pipe into memory
-****************************************************************************/
-char *file_pload(char *syscmd, size_t *size)
+static char *file_pload(const char *syscmd, size_t *size)
{
int fd, n;
- char *p, *tp;
- pstring buf;
+ char *p;
+ char buf[1024];
size_t total;
-
+
fd = sys_popen(syscmd);
- if (fd == -1) return NULL;
+ if (fd == -1) {
+ return NULL;
+ }
p = NULL;
total = 0;
- while ((n = read(fd, buf, sizeof(buf))) > 0) {
- tp = Realloc(p, total + n + 1);
- if (!tp) {
- DEBUG(0,("file_pload: failed to exand buffer!\n"));
+ while ((n = sys_read(fd, buf, sizeof(buf))) > 0) {
+ p = talloc_realloc(NULL, p, char, total + n + 1);
+ if (!p) {
+ DEBUG(0,("file_pload: failed to expand buffer!\n"));
close(fd);
- SAFE_FREE(p);
return NULL;
- } else p = tp;
+ }
memcpy(p+total, buf, n);
total += n;
}
- if (p) p[total] = 0;
-
- sys_pclose(fd);
-
- if (size) *size = total;
-
- return p;
-}
-
-/****************************************************************************
-load a file into memory from a fd.
-****************************************************************************/
-
-char *fd_load(int fd, size_t *size)
-{
- SMB_STRUCT_STAT sbuf;
- char *p;
- if (sys_fstat(fd, &sbuf) != 0) return NULL;
-
- p = (char *)malloc(sbuf.st_size+1);
- if (!p) return NULL;
-
- if (read(fd, p, sbuf.st_size) != sbuf.st_size) {
- SAFE_FREE(p);
- return NULL;
+ if (p) {
+ p[total] = 0;
}
- p[sbuf.st_size] = 0;
-
- if (size) *size = sbuf.st_size;
-
- return p;
-}
-
-/****************************************************************************
-load a file into memory
-****************************************************************************/
-char *file_load(const char *fname, size_t *size)
-{
- int fd;
- char *p;
-
- if (!fname || !*fname) return NULL;
-
- fd = open(fname,O_RDONLY);
- if (fd == -1) return NULL;
-
- p = fd_load(fd, size);
-
- close(fd);
-
- return p;
-}
+ /* FIXME: Perhaps ought to check that the command completed
+ * successfully (returned 0); if not the data may be
+ * truncated. */
+ sys_pclose(fd);
-/*******************************************************************
-mmap (if possible) or read a file
-********************************************************************/
-void *map_file(char *fname, size_t size)
-{
- size_t s2 = 0;
- void *p = NULL;
-#ifdef HAVE_MMAP
- int fd;
- fd = open(fname, O_RDONLY, 0);
- if (fd == -1) {
- DEBUG(1,("Failed to load %s - %s\n", fname, strerror(errno)));
- return NULL;
- }
- p = mmap(NULL, size, PROT_READ, MAP_SHARED|MAP_FILE, fd, 0);
- close(fd);
- if (p == MAP_FAILED) {
- DEBUG(1,("Failed to mmap %s - %s\n", fname, strerror(errno)));
- return NULL;
- }
-#endif
- if (!p) {
- p = file_load(fname, &s2);
- if (!p || s2 != size) {
- DEBUG(1,("incorrect size for %s - got %d expected %d\n",
- fname, s2, size));
- if (p) free(p);
- return NULL;
- }
+ if (size) {
+ *size = total;
}
return p;
}
-/****************************************************************************
-parse a buffer into lines
-****************************************************************************/
-static char **file_lines_parse(char *p, size_t size, int *numlines)
-{
- int i;
- char *s, **ret;
-
- if (!p) return NULL;
-
- for (s = p, i=0; s < p+size; s++) {
- if (s[0] == '\n') i++;
- }
-
- ret = (char **)malloc(sizeof(ret[0])*(i+2));
- if (!ret) {
- SAFE_FREE(p);
- return NULL;
- }
- memset(ret, 0, sizeof(ret[0])*(i+2));
- if (numlines) *numlines = i;
-
- ret[0] = p;
- for (s = p, i=0; s < p+size; s++) {
- if (s[0] == '\n') {
- s[0] = 0;
- i++;
- ret[i] = s+1;
- }
- if (s[0] == '\r') s[0] = 0;
- }
-
- return ret;
-}
-
-
-/****************************************************************************
-load a file into memory and return an array of pointers to lines in the file
-must be freed with file_lines_free().
-****************************************************************************/
-char **file_lines_load(const char *fname, int *numlines)
-{
- char *p;
- size_t size;
- p = file_load(fname, &size);
- if (!p) return NULL;
+/**
+ Load a pipe into memory and return an array of pointers to lines in the data
+ must be freed with TALLOC_FREE.
+**/
- return file_lines_parse(p, size, numlines);
-}
-
-/****************************************************************************
-load a fd into memory and return an array of pointers to lines in the file
-must be freed with file_lines_free(). If convert is true calls unix_to_dos on
-the list.
-****************************************************************************/
-char **fd_lines_load(int fd, int *numlines)
-{
- char *p;
- size_t size;
-
- p = fd_load(fd, &size);
- if (!p) return NULL;
-
- return file_lines_parse(p, size, numlines);
-}
-
-
-/****************************************************************************
-load a pipe into memory and return an array of pointers to lines in the data
-must be freed with file_lines_free().
-****************************************************************************/
-char **file_lines_pload(char *syscmd, int *numlines)
+char **file_lines_pload(TALLOC_CTX *mem_ctx, const char *syscmd,
+ int *numlines)
{
char *p;
size_t size;
p = file_pload(syscmd, &size);
- if (!p) return NULL;
-
- return file_lines_parse(p, size, numlines);
-}
-
-/****************************************************************************
-free lines loaded with file_lines_load
-****************************************************************************/
-void file_lines_free(char **lines)
-{
- if (!lines) return;
- SAFE_FREE(lines[0]);
- SAFE_FREE(lines);
-}
-
-
-/****************************************************************************
-take a lislist of lines and modify them to produce a list where \ continues
-a line
-****************************************************************************/
-void file_lines_slashcont(char **lines)
-{
- int i, j;
-
- for (i=0; lines[i];) {
- int len = strlen(lines[i]);
- if (lines[i][len-1] == '\\') {
- lines[i][len-1] = ' ';
- if (lines[i+1]) {
- char *p = &lines[i][len];
- while (p < lines[i+1]) *p++ = ' ';
- for (j = i+1; lines[j]; j++) lines[j] = lines[j+1];
- }
- } else {
- i++;
- }
+ if (!p) {
+ return NULL;
}
+
+ return file_lines_parse(p, size, numlines, mem_ctx);
}
git.samba.org / samba.git / blobdiff