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authorticktock35 <ticktock35@e8e0d7a0-c8d9-11dd-a880-a1081c7ac358>2008-12-14 23:10:56 (EST)
committer ticktock35 <ticktock35@e8e0d7a0-c8d9-11dd-a880-a1081c7ac358>2008-12-14 23:10:56 (EST)
commit8bf49d16a637cca0cd116450dfcabc4c941baf6c (patch)
treebea96583e7a63f1b87ad4ef07b191f121348fe78 /file_util.c
parent4074befd4db12e78af74f7e1438459125b0b3016 (diff)
* Add ipkg for future development
git-svn-id: http://opkg.googlecode.com/svn/trunk@3 e8e0d7a0-c8d9-11dd-a880-a1081c7ac358
Diffstat (limited to 'file_util.c')
-rw-r--r--file_util.c177
1 files changed, 177 insertions, 0 deletions
diff --git a/file_util.c b/file_util.c
new file mode 100644
index 0000000..e8084dd
--- /dev/null
+++ b/file_util.c
@@ -0,0 +1,177 @@
+/* file_util.c - convenience routines for common stat operations
+
+ Carl D. Worth
+
+ Copyright (C) 2001 University of Southern California
+
+ 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, 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.
+*/
+
+#include "ipkg.h"
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#include "sprintf_alloc.h"
+#include "file_util.h"
+#include "md5.h"
+#include "libbb/libbb.h"
+#undef strlen
+
+int file_exists(const char *file_name)
+{
+ int err;
+ struct stat stat_buf;
+
+ err = stat(file_name, &stat_buf);
+ if (err == 0) {
+ return 1;
+ } else {
+ return 0;
+ }
+}
+
+int file_is_dir(const char *file_name)
+{
+ int err;
+ struct stat stat_buf;
+
+ err = stat(file_name, &stat_buf);
+ if (err) {
+ return 0;
+ }
+
+ return S_ISDIR(stat_buf.st_mode);
+}
+
+/* read a single line from a file, stopping at a newline or EOF.
+ If a newline is read, it will appear in the resulting string.
+ Return value is a malloc'ed char * which should be freed at
+ some point by the caller.
+
+ Return value is NULL if the file is at EOF when called.
+*/
+#define FILE_READ_LINE_BUF_SIZE 1024
+char *file_read_line_alloc(FILE *file)
+{
+ char buf[FILE_READ_LINE_BUF_SIZE];
+ int buf_len;
+ char *line = NULL;
+ int line_size = 0;
+
+ memset(buf, 0, FILE_READ_LINE_BUF_SIZE);
+ while (fgets(buf, FILE_READ_LINE_BUF_SIZE, file)) {
+ buf_len = strlen(buf);
+ if (line) {
+ line_size += buf_len;
+ line = realloc(line, line_size);
+ if (line == NULL) {
+ fprintf(stderr, "%s: out of memory\n", __FUNCTION__);
+ break;
+ }
+ strcat(line, buf);
+ } else {
+ line_size = buf_len + 1;
+ line = strdup(buf);
+ }
+ if (buf[buf_len - 1] == '\n') {
+ break;
+ }
+ }
+
+ return line;
+}
+
+int file_move(const char *src, const char *dest)
+{
+ int err;
+
+ err = rename(src, dest);
+
+ if (err && errno == EXDEV) {
+ err = file_copy(src, dest);
+ unlink(src);
+ } else if (err) {
+ fprintf(stderr, "%s: ERROR: failed to rename %s to %s: %s\n",
+ __FUNCTION__, src, dest, strerror(errno));
+ }
+
+ return err;
+}
+
+/* I put these here to keep libbb dependencies from creeping all over
+ the ipkg code */
+int file_copy(const char *src, const char *dest)
+{
+ int err;
+
+ err = copy_file(src, dest, FILEUTILS_FORCE | FILEUTILS_PRESERVE_STATUS);
+ if (err) {
+ fprintf(stderr, "%s: ERROR: failed to copy %s to %s\n",
+ __FUNCTION__, src, dest);
+ }
+
+ return err;
+}
+
+int file_mkdir_hier(const char *path, long mode)
+{
+ return make_directory(path, mode, FILEUTILS_RECUR);
+}
+
+char *file_md5sum_alloc(const char *file_name)
+{
+ static const int md5sum_bin_len = 16;
+ static const int md5sum_hex_len = 32;
+
+ static const unsigned char bin2hex[16] = {
+ '0', '1', '2', '3',
+ '4', '5', '6', '7',
+ '8', '9', 'a', 'b',
+ 'c', 'd', 'e', 'f'
+ };
+
+ int i, err;
+ FILE *file;
+ unsigned char *md5sum_hex;
+ unsigned char md5sum_bin[md5sum_bin_len];
+
+ md5sum_hex = malloc(md5sum_hex_len + 1);
+ if (md5sum_hex == NULL) {
+ fprintf(stderr, "%s: out of memory\n", __FUNCTION__);
+ return strdup("");
+ }
+
+ file = fopen(file_name, "r");
+ if (file == NULL) {
+ fprintf(stderr, "%s: Failed to open file %s: %s\n",
+ __FUNCTION__, file_name, strerror(errno));
+ return strdup("");
+ }
+
+ err = md5_stream(file, md5sum_bin);
+ if (err) {
+ fprintf(stderr, "%s: ERROR computing md5sum for %s: %s\n",
+ __FUNCTION__, file_name, strerror(err));
+ return strdup("");
+ }
+
+ fclose(file);
+
+ for (i=0; i < md5sum_bin_len; i++) {
+ md5sum_hex[i*2] = bin2hex[md5sum_bin[i] >> 4];
+ md5sum_hex[i*2+1] = bin2hex[md5sum_bin[i] & 0xf];
+ }
+
+ md5sum_hex[md5sum_hex_len] = '\0';
+
+ return md5sum_hex;
+}
+