X-Git-Url: https://git.librecmc.org/?p=oweals%2Fopkg-lede.git;a=blobdiff_plain;f=libopkg%2Ffile_util.c;h=155d73b52be1ac81d88ebfd851c50c98ede6f012;hp=3ab1cc571660efa3856812f54e767fe9c078e6f5;hb=54cc7e3bd1f79569022aa9fc3d0e748c81e3bcd8;hpb=9e9f4261abe887b1d98dedabd6b52dbc238d82bf

diff --git a/libopkg/file_util.c b/libopkg/file_util.c
index 3ab1cc5..155d73b 100644
--- a/libopkg/file_util.c
+++ b/libopkg/file_util.c
@@ -1,7 +1,8 @@
 /* file_util.c - convenience routines for common stat operations
 
-   Carl D. Worth
+   Copyright (C) 2009 Ubiq Technologies <graham.gower@gmail.com>
 
+   Carl D. Worth
    Copyright (C) 2001 University of Southern California
 
    This program is free software; you can redistribute it and/or
@@ -15,40 +16,44 @@
    General Public License for more details.
 */
 
-#include "opkg.h"
+#include "config.h"
+
+#include <stdio.h>
 #include <sys/types.h>
 #include <sys/stat.h>
+#include <dirent.h>
+#include <unistd.h>
+#include <ctype.h>
 
 #include "sprintf_alloc.h"
 #include "file_util.h"
+#ifdef HAVE_MD5
 #include "md5.h"
+#endif
 #include "libbb/libbb.h"
-#undef strlen
+
+#if defined HAVE_SHA256
+#include "sha256.h"
+#endif
 
 int file_exists(const char *file_name)
 {
-    int err;
-    struct stat stat_buf;
+	struct stat st;
+
+	if (stat(file_name, &st) == -1)
+		return 0;
 
-    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;
+	struct stat st;
 
-    err = stat(file_name, &stat_buf);
-    if (err) {
-	return 0;
-    }
+	if (stat(file_name, &st) == -1)
+		return 0;
 
-    return S_ISDIR(stat_buf.st_mode);
+	return S_ISDIR(st.st_mode);
 }
 
 /* read a single line from a file, stopping at a newline or EOF.
@@ -58,120 +63,303 @@ int file_is_dir(const char *file_name)
 
    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 *file_read_line_alloc(FILE * fp)
 {
-    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;
+	char buf[BUFSIZ];
+	unsigned int buf_len;
+	char *line = NULL;
+	unsigned int line_size = 0;
+	int got_nl = 0;
+
+	buf[0] = '\0';
+
+	while (fgets(buf, BUFSIZ, fp)) {
+		buf_len = strlen(buf);
+		if (buf[buf_len - 1] == '\n') {
+			buf_len--;
+			buf[buf_len] = '\0';
+			got_nl = 1;
+		}
+		if (line) {
+			line_size += buf_len;
+			line = xrealloc(line, line_size + 1);
+			strncat(line, buf, line_size);
+		} else {
+			line_size = buf_len + 1;
+			line = xstrdup(buf);
+		}
+		if (got_nl)
+			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));
-    }
+	int err;
+
+	err = rename(src, dest);
+	if (err == -1) {
+		if (errno == EXDEV) {
+			/* src & dest live on different file systems */
+			err = file_copy(src, dest);
+			if (err == 0)
+				unlink(src);
+		} else {
+			opkg_perror(ERROR, "Failed to rename %s to %s",
+				    src, dest);
+		}
+	}
 
-    return err;
+	return err;
 }
 
-/* I put these here to keep libbb dependencies from creeping all over
-   the opkg code */
 int file_copy(const char *src, const char *dest)
 {
-    int err;
+	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);
-    }
+	err = copy_file(src, dest, FILEUTILS_FORCE | FILEUTILS_PRESERVE_STATUS);
+	if (err)
+		opkg_msg(ERROR, "Failed to copy file %s to %s.\n", src, dest);
 
-    return err;
+	return err;
 }
 
 int file_mkdir_hier(const char *path, long mode)
 {
-    return make_directory(path, mode, FILEUTILS_RECUR);
+	return make_directory(path, mode, FILEUTILS_RECUR);
 }
 
+#ifdef HAVE_MD5
 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;
-    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;
+	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;
+	char *md5sum_hex;
+	unsigned char md5sum_bin[md5sum_bin_len];
+
+	md5sum_hex = xcalloc(1, md5sum_hex_len + 1);
+
+	file = fopen(file_name, "r");
+	if (file == NULL) {
+		opkg_perror(ERROR, "Failed to open file %s", file_name);
+		free(md5sum_hex);
+		return NULL;
+	}
+
+	err = md5_stream(file, md5sum_bin);
+	if (err) {
+		opkg_msg(ERROR, "Could't compute md5sum for %s.\n", file_name);
+		fclose(file);
+		free(md5sum_hex);
+		return NULL;
+	}
+
+	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;
+}
+#endif
+
+#ifdef HAVE_SHA256
+char *file_sha256sum_alloc(const char *file_name)
+{
+	static const int sha256sum_bin_len = 32;
+	static const int sha256sum_hex_len = 64;
+
+	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;
+	char *sha256sum_hex;
+	unsigned char sha256sum_bin[sha256sum_bin_len];
+
+	sha256sum_hex = xcalloc(1, sha256sum_hex_len + 1);
+
+	file = fopen(file_name, "r");
+	if (file == NULL) {
+		opkg_perror(ERROR, "Failed to open file %s", file_name);
+		free(sha256sum_hex);
+		return NULL;
+	}
+
+	err = sha256_stream(file, sha256sum_bin);
+	if (err) {
+		opkg_msg(ERROR, "Could't compute sha256sum for %s.\n",
+			 file_name);
+		fclose(file);
+		free(sha256sum_hex);
+		return NULL;
+	}
+
+	fclose(file);
+
+	for (i = 0; i < sha256sum_bin_len; i++) {
+		sha256sum_hex[i * 2] = bin2hex[sha256sum_bin[i] >> 4];
+		sha256sum_hex[i * 2 + 1] = bin2hex[sha256sum_bin[i] & 0xf];
+	}
+
+	sha256sum_hex[sha256sum_hex_len] = '\0';
+
+	return sha256sum_hex;
 }
 
+#endif
+
+char *checksum_bin2hex(const char *src, size_t len)
+{
+	unsigned char *p;
+	static unsigned char buf[65];
+	const unsigned char *s = (unsigned char *)src;
+	static const unsigned char bin2hex[16] = {
+		'0', '1', '2', '3',
+		'4', '5', '6', '7',
+		'8', '9', 'a', 'b',
+		'c', 'd', 'e', 'f'
+	};
+
+	if (len > 32)
+		return NULL;
+
+	for (p = buf; len > 0; s++, len--) {
+		*p++ = bin2hex[*s / 16];
+		*p++ = bin2hex[*s % 16];
+	}
+
+	*p = 0;
+
+	return (char *)buf;
+}
+
+char *checksum_hex2bin(const char *src, size_t *len)
+{
+	size_t slen;
+	unsigned char *p;
+	const unsigned char *s = (unsigned char *)src;
+	static unsigned char buf[32];
+
+	while (isspace(*src))
+		src++;
+
+	slen = strlen(src);
+
+	if (slen > 64) {
+		*len = 0;
+		return NULL;
+	}
+
+#define hex(c) \
+	(c >= 'a' ? (c - 'a') : (c >= 'A' ? (c - 'A') : (c - '0')))
+
+	for (p = buf, *len = 0;
+	     slen > 0 && isxdigit(s[0]) && isxdigit(s[1]);
+	     slen--, s += 2, (*len)++)
+		*p++ = hex(s[0]) * 16 + hex(s[1]);
+
+	return (char *)buf;
+}
+
+int rm_r(const char *path)
+{
+	int ret = 0;
+	DIR *dir;
+	struct dirent *dent;
+
+	if (path == NULL) {
+		opkg_perror(ERROR, "Missing directory parameter");
+		return -1;
+	}
+
+	dir = opendir(path);
+	if (dir == NULL) {
+		opkg_perror(ERROR, "Failed to open dir %s", path);
+		return -1;
+	}
+
+	if (fchdir(dirfd(dir)) == -1) {
+		opkg_perror(ERROR, "Failed to change to dir %s", path);
+		closedir(dir);
+		return -1;
+	}
+
+	while (1) {
+		errno = 0;
+		if ((dent = readdir(dir)) == NULL) {
+			if (errno) {
+				opkg_perror(ERROR, "Failed to read dir %s",
+					    path);
+				ret = -1;
+			}
+			break;
+		}
+
+		if (!strcmp(dent->d_name, ".") || !strcmp(dent->d_name, ".."))
+			continue;
+
+#ifdef _BSD_SOURCE
+		if (dent->d_type == DT_DIR) {
+			if ((ret = rm_r(dent->d_name)) == -1)
+				break;
+			continue;
+		} else if (dent->d_type == DT_UNKNOWN)
+#endif
+		{
+			struct stat st;
+			if ((ret = lstat(dent->d_name, &st)) == -1) {
+				opkg_perror(ERROR, "Failed to lstat %s",
+					    dent->d_name);
+				break;
+			}
+			if (S_ISDIR(st.st_mode)) {
+				if ((ret = rm_r(dent->d_name)) == -1)
+					break;
+				continue;
+			}
+		}
+
+		if ((ret = unlink(dent->d_name)) == -1) {
+			opkg_perror(ERROR, "Failed to unlink %s", dent->d_name);
+			break;
+		}
+	}
+
+	if (chdir("..") == -1) {
+		ret = -1;
+		opkg_perror(ERROR, "Failed to change to dir %s/..", path);
+	}
+
+	if (rmdir(path) == -1) {
+		ret = -1;
+		opkg_perror(ERROR, "Failed to remove dir %s", path);
+	}
+
+	if (closedir(dir) == -1) {
+		ret = -1;
+		opkg_perror(ERROR, "Failed to close dir %s", path);
+	}
+
+	return ret;
+}