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-rw-r--r--lib/util/util_file.c498
1 files changed, 498 insertions, 0 deletions
diff --git a/lib/util/util_file.c b/lib/util/util_file.c
new file mode 100644
index 0000000..fa5abad
--- /dev/null
+++ b/lib/util/util_file.c
@@ -0,0 +1,498 @@
+/*
+ * Unix SMB/CIFS implementation.
+ * SMB parameters and setup
+ * Copyright (C) Andrew Tridgell 1992-1998 Modified by Jeremy Allison 1995.
+ *
+ * Added afdgets() Jelmer Vernooij 2005
+ *
+ * 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 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "replace.h"
+#include "system/shmem.h"
+#include "system/filesys.h"
+#include <talloc.h>
+#include "lib/util/samba_util.h"
+#include "lib/util/sys_popen.h"
+#include "lib/util/sys_rw.h"
+#include "lib/util/debug.h"
+
+/**
+ * Read one line (data until next newline or eof) and allocate it
+ */
+_PUBLIC_ char *afdgets(int fd, TALLOC_CTX *mem_ctx, size_t hint)
+{
+ char *data = NULL;
+ ssize_t alloc_size = 0, offset = 0, ret;
+ int p;
+
+ if (hint <= 0) hint = 0x100;
+
+ do {
+ alloc_size += hint;
+
+ data = talloc_realloc(mem_ctx, data, char, alloc_size);
+
+ if (!data)
+ return NULL;
+
+ ret = read(fd, data + offset, hint);
+
+ if (ret == 0) {
+ return NULL;
+ }
+
+ if (ret == -1) {
+ talloc_free(data);
+ return NULL;
+ }
+
+ /* Find newline */
+ for (p = 0; p < ret; p++) {
+ if (data[offset + p] == '\n')
+ break;
+ }
+
+ if (p < ret) {
+ data[offset + p] = '\0';
+
+ /* Go back to position of newline */
+ lseek(fd, p - ret + 1, SEEK_CUR);
+ return data;
+ }
+
+ offset += ret;
+
+ } while ((size_t)ret == hint);
+
+ data[offset] = '\0';
+
+ return data;
+}
+
+char *fgets_slash(TALLOC_CTX *mem_ctx, char *s2, size_t maxlen, FILE *f)
+{
+ char *s = s2;
+ size_t len = 0;
+ int c;
+ bool start_of_line = true;
+
+ if (feof(f)) {
+ return NULL;
+ }
+
+ if (maxlen < 2) {
+ return NULL;
+ }
+
+ if (s2 == NULL) {
+ maxlen = MIN(maxlen,8);
+ s = talloc_array(mem_ctx, char, maxlen);
+ }
+
+ if (s == NULL) {
+ return NULL;
+ }
+
+ *s = 0;
+
+ while (len < maxlen-1) {
+ c = 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 == NULL)) {
+ TALLOC_FREE(s);
+ }
+ return (len>0) ? s : NULL;
+ case ' ':
+ if (start_of_line) {
+ break;
+ }
+
+ FALL_THROUGH;
+ default:
+ start_of_line = false;
+ s[len++] = c;
+ s[len] = 0;
+ }
+ if ((s2 == NULL) && (len > maxlen-3)) {
+ size_t m;
+ char *t;
+
+ m = maxlen * 2;
+ if (m < maxlen) {
+ DBG_ERR("length overflow");
+ TALLOC_FREE(s);
+ return NULL;
+ }
+ maxlen = m;
+
+ t = talloc_realloc(mem_ctx, s, char, maxlen);
+ if (t == NULL) {
+ DBG_ERR("failed to expand buffer!\n");
+ TALLOC_FREE(s);
+ return NULL;
+ }
+
+ s = t;
+ }
+ }
+
+ return s;
+}
+
+/**
+load a file into memory from a fd.
+**/
+_PUBLIC_ char *fd_load(int fd, size_t *psize, size_t maxsize, TALLOC_CTX *mem_ctx)
+{
+ FILE *file;
+ char *p = NULL;
+ size_t size = 0;
+ size_t chunk = 1024;
+ int err;
+ int fd_dup;
+
+ if (maxsize == 0) {
+ maxsize = SIZE_MAX;
+ }
+
+ fd_dup = dup(fd);
+ if (fd_dup == -1) {
+ return NULL;
+ }
+
+ file = fdopen(fd_dup, "r");
+ if (file == NULL) {
+ close(fd_dup);
+ return NULL;
+ }
+
+ while (size < maxsize) {
+ size_t newbufsize;
+ size_t nread;
+
+ chunk = MIN(chunk, (maxsize - size));
+
+ newbufsize = size + (chunk+1); /* chunk+1 can't overflow */
+ if (newbufsize < size) {
+ goto fail; /* overflow */
+ }
+
+ p = talloc_realloc(mem_ctx, p, char, newbufsize);
+ if (p == NULL) {
+ goto fail;
+ }
+
+ nread = fread(p+size, 1, chunk, file);
+ size += nread;
+
+ if (nread != chunk) {
+ break;
+ }
+ }
+
+ err = ferror(file);
+ if (err != 0) {
+ goto fail;
+ }
+
+ p[size] = '\0';
+
+ if (psize != NULL) {
+ *psize = size;
+ }
+
+ fclose(file);
+ return p;
+
+fail:
+ TALLOC_FREE(p);
+ fclose(file);
+ return NULL;
+}
+
+/**
+load a file into memory
+**/
+_PUBLIC_ char *file_load(const char *fname, size_t *size, size_t maxsize, TALLOC_CTX *mem_ctx)
+{
+ int fd;
+ char *p;
+
+ if (!fname || !*fname) return NULL;
+
+ fd = open(fname,O_RDONLY);
+ if (fd == -1) return NULL;
+
+ p = fd_load(fd, size, maxsize, mem_ctx);
+
+ close(fd);
+
+ return p;
+}
+
+/**
+parse a buffer into lines
+'p' will be freed on error, and otherwise will be made a child of the returned array
+**/
+static char **file_lines_parse_internal(char *p, size_t size, int *numlines, TALLOC_CTX *mem_ctx)
+{
+ unsigned int i;
+ char *s, **ret;
+
+ if (!p) return NULL;
+
+ for (s = p, i=0; s < p+size; s++) {
+ if (s[0] == '\n') i++;
+ }
+
+ ret = talloc_zero_array(mem_ctx, char *, i+2);
+ if (!ret) {
+ talloc_free(p);
+ return NULL;
+ }
+
+ talloc_steal(ret, p);
+
+ ret[0] = p;
+ for (s = p, i=1; s < p+size; s++) {
+ if (s[0] == '\n') {
+ s[0] = 0;
+ ret[i] = s+1;
+ i++;
+ }
+ if (s[0] == '\r') s[0] = 0;
+ }
+
+ /* remove any blank lines at the end */
+ while (i > 0 && ret[i-1][0] == 0) {
+ i--;
+ }
+
+ if (numlines) *numlines = i;
+
+ return ret;
+}
+
+
+/**
+load a file into memory and return an array of pointers to lines in the file
+must be freed with talloc_free().
+**/
+_PUBLIC_ char **file_lines_load(const char *fname, int *numlines, size_t maxsize, TALLOC_CTX *mem_ctx)
+{
+ char *p;
+ size_t size;
+
+ p = file_load(fname, &size, maxsize, mem_ctx);
+ if (!p) return NULL;
+
+ return file_lines_parse_internal(p, size, numlines, mem_ctx);
+}
+
+/**
+load a fd into memory and return an array of pointers to lines in the file
+must be freed with talloc_free(). If convert is true calls unix_to_dos on
+the list.
+**/
+_PUBLIC_ char **fd_lines_load(int fd, int *numlines, size_t maxsize, TALLOC_CTX *mem_ctx)
+{
+ char *p;
+ size_t size;
+
+ p = fd_load(fd, &size, maxsize, mem_ctx);
+ if (!p) return NULL;
+
+ return file_lines_parse_internal(p, size, numlines, mem_ctx);
+}
+
+_PUBLIC_ char **file_lines_parse(const char *p_in,
+ size_t size,
+ int *numlines,
+ TALLOC_CTX *mem_ctx)
+{
+ /*
+ * Copy the incoming string so it can end up
+ * being owned by the returned pointer and
+ * freed when that is.
+ */
+ char *p = talloc_strdup(mem_ctx, p_in);
+ if (p == NULL) {
+ return NULL;
+ }
+ return file_lines_parse_internal(p, size, numlines, mem_ctx);
+}
+
+_PUBLIC_ bool file_save_mode(const char *fname, const void *packet,
+ size_t length, mode_t mode)
+{
+ ssize_t num_written;
+ int fd;
+ fd = open(fname, O_WRONLY|O_CREAT|O_EXCL, mode);
+ if (fd == -1) {
+ return false;
+ }
+ num_written = write(fd, packet, length);
+ if (num_written == -1 || (size_t)num_written != length) {
+ close(fd);
+ return false;
+ }
+ close(fd);
+ return true;
+}
+
+/**
+ save a lump of data into a file. Mostly used for debugging
+*/
+_PUBLIC_ bool file_save(const char *fname, const void *packet, size_t length)
+{
+ return file_save_mode(fname, packet, length, 0644);
+}
+
+_PUBLIC_ int vfdprintf(int fd, const char *format, va_list ap)
+{
+ char *p;
+ int len, ret;
+ va_list ap2;
+
+ va_copy(ap2, ap);
+ len = vasprintf(&p, format, ap2);
+ va_end(ap2);
+ if (len <= 0) return len;
+ ret = write(fd, p, len);
+ SAFE_FREE(p);
+ return ret;
+}
+
+_PUBLIC_ int fdprintf(int fd, const char *format, ...)
+{
+ va_list ap;
+ int ret;
+
+ va_start(ap, format);
+ ret = vfdprintf(fd, format, ap);
+ va_end(ap);
+ return ret;
+}
+
+
+/*
+ compare two files, return true if the two files have the same content
+ */
+bool file_compare(const char *path1, const char *path2)
+{
+ FILE *f1 = NULL, *f2 = NULL;
+ uint8_t buf1[1024], buf2[1024];
+ bool ret = false;
+
+ f1 = fopen(path1, "r");
+ if (f1 == NULL) {
+ goto done;
+ }
+ f2 = fopen(path2, "r");
+ if (f2 == NULL) {
+ goto done;
+ }
+
+ while (!feof(f1)) {
+ size_t n1 = fread(buf1, 1, sizeof(buf1), f1);
+ size_t n2 = fread(buf2, 1, sizeof(buf2), f2);
+
+ if (n1 != n2) {
+ goto done;
+ }
+ if (n1 == 0) {
+ ret = (feof(f1) && feof(f2));
+ goto done;
+ }
+ if (memcmp(buf1, buf2, n1) != 0) {
+ goto done;
+ }
+ if (n1 < sizeof(buf1)) {
+ bool has_error = (ferror(f1) || ferror(f2));
+ if (has_error) {
+ goto done;
+ }
+ }
+ }
+ ret = true;
+done:
+ if (f2 != NULL) {
+ fclose(f2);
+ }
+ if (f1 != NULL) {
+ fclose(f1);
+ }
+ return ret;
+}
+
+/**
+ Load from a pipe into memory.
+**/
+char *file_ploadv(char * const argl[], size_t *size)
+{
+ int fd, n;
+ char *p = NULL;
+ char buf[1024];
+ size_t total;
+
+ fd = sys_popenv(argl);
+ if (fd == -1) {
+ return NULL;
+ }
+
+ total = 0;
+
+ while ((n = sys_read(fd, buf, sizeof(buf))) > 0) {
+ p = talloc_realloc(NULL, p, char, total + n + 1);
+ if (p == NULL) {
+ DBG_ERR("failed to expand buffer!\n");
+ close(fd);
+ return NULL;
+ }
+ memcpy(p+total, buf, n);
+ total += n;
+ }
+
+ if (p != NULL) {
+ p[total] = 0;
+ }
+
+ /*
+ * FIXME: Perhaps ought to check that the command completed
+ * successfully (returned 0); if not the data may be
+ * truncated.
+ */
+ sys_pclose(fd);
+
+ if (size) {
+ *size = total;
+ }
+
+ return p;
+}
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