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-rw-r--r--source/lib/util_file.c594
1 files changed, 594 insertions, 0 deletions
diff --git a/source/lib/util_file.c b/source/lib/util_file.c
new file mode 100644
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--- /dev/null
+++ b/source/lib/util_file.c
@@ -0,0 +1,594 @@
+/*
+ * Unix SMB/Netbios implementation. Version 1.9. 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)
+ * 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 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;
+}
+
+/***************************************************************
+ Unlock an fd. Abandon after waitsecs seconds.
+****************************************************************/
+
+BOOL file_unlock(int fd, int *plock_depth)
+{
+ BOOL ret=True;
+
+ if(*plock_depth == 1)
+ ret = do_file_lock(fd, 5, F_UNLCK);
+
+ (*plock_depth)--;
+
+ if(!ret)
+ DEBUG(10,("file_unlock: unlocking file failed, error = %s.\n",
+ strerror(errno)));
+ return ret;
+}
+
+/***************************************************************
+ 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)
+{
+ 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 (!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;
+ }
+
+ /* Make sure it is only rw by the owner */
+ chmod(pfile, 0600);
+
+ /* We have a lock on the file. */
+ return (void *)fp;
+}
+
+/***************************************************************
+ End enumeration of the file.
+****************************************************************/
+void endfilepwent(void *vp, int *file_lock_depth)
+{
+ FILE *fp = (FILE *)vp;
+
+ file_unlock(fileno(fp), file_lock_depth);
+ fclose(fp);
+ DEBUG(7, ("endfilepwent: closed file.\n"));
+}
+
+/*************************************************************************
+ 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);
+}
+
+/*************************************************************************
+ 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);
+}
+
+/*************************************************************************
+ 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)
+{
+ /* 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;
+ }
+
+ /*
+ * 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;
+ }
+ return -1;
+}
+
+
+/****************************************************************************
+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);
+}
+
+
+/****************************************************************************
+load from a pipe into memory
+****************************************************************************/
+char *file_pload(char *syscmd, size_t *size)
+{
+ int fd, n;
+ char *p, *tp;
+ pstring buf;
+ size_t total;
+
+ fd = sys_popen(syscmd);
+ 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"));
+ 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;
+ }
+ 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;
+}
+
+
+/*******************************************************************
+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
+ if (lp_use_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;
+ }
+ }
+
+ 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;
+
+ 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 *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++;
+ }
+ }
+}
+
+/*
+ save a lump of data into a file. Mostly used for debugging
+*/
+BOOL file_save(const char *fname, void *packet, size_t length)
+{
+ int fd;
+ fd = open(fname, O_WRONLY|O_CREAT|O_TRUNC, 0644);
+ if (fd == -1) {
+ return False;
+ }
+ if (write(fd, packet, length) != length) {
+ return False;
+ }
+ close(fd);
+ return True;
+}
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