mirror of
https://github.com/radareorg/radare2.git
synced 2024-12-14 08:49:50 +00:00
788 lines
16 KiB
C
788 lines
16 KiB
C
/* radare - LGPL - Copyright 2007-2016 - pancake */
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#include "r_types.h"
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#include "r_util.h"
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#include <stdio.h>
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#include <sys/time.h>
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#include <time.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include <fcntl.h>
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#if __UNIX__
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#include <sys/mman.h>
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#endif
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R_API bool r_file_truncate (const char *filename, ut64 newsize) {
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int fd;
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if (r_file_is_directory (filename)) {
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return false;
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}
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if (!r_file_exists (filename) || !r_file_is_regular (filename)) {
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return false;
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}
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#if __WINDOWS__
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fd = r_sandbox_open (filename, O_RDWR, 0644);
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#else
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fd = r_sandbox_open (filename, O_RDWR|O_SYNC, 0644);
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#endif
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if (fd == -1) {
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return false;
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}
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ftruncate (fd, newsize);
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close (fd);
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return true;
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}
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/*
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Example:
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str = r_file_basename ("home/inisider/Downloads/user32.dll");
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// str == user32.dll
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*/
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R_API const char *r_file_basename (const char *path) {
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const char *ptr = r_str_rchr (path, NULL, '/');
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if (ptr) {
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path = ptr + 1;
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} else {
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ptr = r_str_rchr (path, NULL, '\\');
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if (ptr) path = ptr + 1;
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}
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return path;
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}
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/*
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Example:
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str = r_file_basename ("home/inisider/Downloads");
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// str == "home/inisider/Downloads"
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free (str);
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*/
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R_API char *r_file_dirname (const char *path) {
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char *newpath = strdup (path);
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char *ptr = (char*)r_str_rchr (newpath, NULL, '/');
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if (ptr) {
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*ptr = 0;
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} else {
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ptr = (char*)r_str_rchr (newpath, NULL, '\\');
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if (ptr) *ptr = 0;
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}
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return newpath;
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}
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R_API bool r_file_is_regular(const char *str) {
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struct stat buf = {0};
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if (!str || !*str || stat (str, &buf) == -1) {
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return false;
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}
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return ((S_IFREG & buf.st_mode)==S_IFREG)? true: false;
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}
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R_API bool r_file_is_directory(const char *str) {
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struct stat buf = {0};
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if (!str||!*str)
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return false;
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if (stat (str, &buf)==-1)
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return false;
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if ((S_IFBLK & buf.st_mode) == S_IFBLK)
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return false;
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return (S_IFDIR==(S_IFDIR & buf.st_mode))? true: false;
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}
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R_API bool r_file_fexists(const char *fmt, ...) {
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int ret;
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char string[1024];
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va_list ap;
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va_start (ap, fmt);
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vsnprintf (string, sizeof (string), fmt, ap);
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ret = r_file_exists (string);
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va_end (ap);
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return ret;
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}
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R_API bool r_file_exists(const char *str) {
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struct stat buf = {0};
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if (str && *str && stat (str, &buf)==-1)
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return false;
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return (S_ISREG (buf.st_mode))? true: false;
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}
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R_API long r_file_proc_size(FILE *fd) {
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long size = 0;
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while (fgetc (fd) != EOF) {
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size++;
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}
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return size;
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}
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R_API ut64 r_file_size(const char *str) {
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struct stat buf = {0};
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if (stat (str, &buf)==-1)
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return 0;
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return (ut64)buf.st_size;
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}
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R_API int r_file_is_abspath(const char *file) {
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return ((*file && file[1]==':') || *file == '/');
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}
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R_API char *r_file_abspath(const char *file) {
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char *cwd, *ret = NULL;
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if (!file || !strcmp (file, ".") || !strcmp (file, "./")) {
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return r_sys_getdir ();
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}
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if (strstr (file, "://")) {
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return strdup (file);
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}
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cwd = r_sys_getdir ();
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if (!strncmp (file, "~/", 2) || !strncmp (file, "~\\", 2)) {
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ret = r_str_home (file + 2);
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} else {
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#if __UNIX__ || __CYGWIN__
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if (cwd && *file != '/')
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ret = r_str_newf ("%s"R_SYS_DIR"%s", cwd, file);
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#elif __WINDOWS__ && !__CYGWIN__
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if (cwd && !strchr (file, ':')) {
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ret = r_str_newf ("%s\\%s", cwd, file);
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}
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#endif
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}
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free (cwd);
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if (!ret) ret = strdup (file);
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#if __UNIX__
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{
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char *resolved_path = calloc(4096, 1); // TODO: use MAXPATH
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char *abspath = realpath (ret, resolved_path);
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if (abspath) {
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free (ret);
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ret = abspath;
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} else {
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free (resolved_path);
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}
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}
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#endif
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return ret;
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}
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R_API char *r_file_path(const char *bin) {
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char file[1024];
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char *path_env;
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char *path = NULL;
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char *str, *ptr;
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if (!bin) return NULL;
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path_env = (char *)r_sys_getenv ("PATH");
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if (path_env) {
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str = path = strdup (path_env);
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do {
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ptr = strchr (str, ':');
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if (ptr) {
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*ptr = '\0';
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snprintf (file, sizeof (file), "%s"R_SYS_DIR"%s", str, bin);
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if (r_file_exists (file)) {
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free (path);
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free (path_env);
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return strdup (file);
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}
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str = ptr + 1;
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}
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} while (ptr);
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}
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free (path_env);
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free (path);
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return strdup (bin);
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}
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R_API char *r_stdin_slurp (int *sz) {
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#define BS 1024
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#if __UNIX__
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int i, ret, newfd;
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char *buf;
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if ((newfd = dup(0)) < 0)
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return NULL;
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buf = malloc (BS);
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for (i=ret=0;;i+=ret) {
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char *new = realloc (buf, i+BS);
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if (!new) {
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eprintf ("Cannot realloc to %d\n", i+BS);
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break;
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}
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buf = new;
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ret = read (0, buf+i, BS);
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if (ret<1)
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break;
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}
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buf[i] = 0;
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dup2 (newfd, 0);
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close (newfd);
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if (sz)
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*sz = i;
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if (i==0) {
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R_FREE (buf);
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}
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return buf;
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#else
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#warning TODO r_stdin_slurp
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return NULL;
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#endif
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}
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R_API char *r_file_slurp(const char *str, int *usz) {
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size_t rsz;
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char *ret;
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FILE *fd;
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long sz;
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if (!r_file_exists (str))
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return NULL;
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fd = r_sandbox_fopen (str, "rb");
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if (!fd) {
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return NULL;
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}
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(void)fseek (fd, 0, SEEK_END);
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sz = ftell (fd);
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if (sz == 0) {
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if (r_file_is_regular (str)) {
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/* proc file */
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fseek (fd, 0, SEEK_SET);
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sz = r_file_proc_size (fd);
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if (!sz) sz = -1;
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} else {
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sz = 65536;
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}
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}
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if (sz < 0) {
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fclose (fd);
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return NULL;
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}
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fseek (fd, 0, SEEK_SET);
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ret = (char *)calloc (sz + 1, 1);
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if (!ret) {
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fclose (fd);
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return NULL;
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}
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rsz = fread (ret, 1, sz, fd);
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if (rsz != sz) {
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// eprintf ("r_file_slurp: fread: error\n");
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sz = rsz;
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}
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fclose (fd);
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ret[sz] = '\0';
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if (usz) {
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*usz = (int)sz;
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}
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return ret;
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}
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R_API ut8 *r_file_gzslurp(const char *str, int *outlen, int origonfail) {
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int sz;
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ut8 *in, *out;
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if (outlen) *outlen = 0;
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in = (ut8*)r_file_slurp (str, &sz);
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if (!in) return NULL;
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out = r_inflate (in, sz, NULL, outlen);
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if (!out && origonfail) {
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// if uncompression fails, return orig buffer ?
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if (outlen) {
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*outlen = sz;
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}
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in[sz] = 0;
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return in;
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}
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free (in);
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return out;
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}
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R_API ut8 *r_file_slurp_hexpairs(const char *str, int *usz) {
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ut8 *ret;
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long sz;
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int c, bytes = 0;
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FILE *fd = r_sandbox_fopen (str, "r");
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if (!fd) {
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return NULL;
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}
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(void)fseek (fd, 0, SEEK_END);
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sz = ftell (fd);
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(void)fseek (fd, 0, SEEK_SET);
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ret = (ut8*)malloc ((sz>>1)+1);
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if (!ret) {
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fclose (fd);
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return NULL;
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}
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for (;;) {
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if (fscanf (fd, " #%*[^\n]") == 1)
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continue;
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if (fscanf (fd, "%02x", &c) == 1) {
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ret[bytes++] = c;
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continue;
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}
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if (feof (fd))
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break;
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free (ret);
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fclose (fd);
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return NULL;
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}
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ret[bytes] = '\0';
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fclose (fd);
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if (usz) *usz = bytes;
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return ret;
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}
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R_API char *r_file_slurp_range(const char *str, ut64 off, int sz, int *osz) {
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char *ret;
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size_t read_items;
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FILE *fd = r_sandbox_fopen (str, "rb");
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if (fd == NULL)
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return NULL;
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// XXX handle out of bound reads (eof)
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if (fseek (fd, off, SEEK_SET) < 0) {
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fclose (fd);
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return NULL;
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}
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ret = (char *)malloc (sz+1);
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if (ret != NULL) {
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if (osz)
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*osz = (int)(size_t)fread (ret, 1, sz, fd);
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else {
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read_items = fread (ret, 1, sz, fd);
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if (!read_items) {
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fclose (fd);
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return ret;
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}
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}
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ret[sz] = '\0';
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}
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fclose (fd);
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return ret;
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}
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R_API char *r_file_slurp_random_line(const char *file) {
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int i = 0;
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return r_file_slurp_random_line_count(file, &i);
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}
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R_API char *r_file_slurp_random_line_count(const char *file, int *line) {
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/* Reservoir Sampling */
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char *ptr = NULL, *str;
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int sz, i, lines, selection = -1;
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struct timeval tv;
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int start = *line;
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if ((str = r_file_slurp (file, &sz))) {
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gettimeofday (&tv,NULL);
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srand (getpid()+tv.tv_usec);
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for (i=0; str[i]; i++) {
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if (str[i]=='\n') {
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if (rand() % (++(*line)) == 0) {
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selection = (*line - 1); /* The line we want. */
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}
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}
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}
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if ((selection < start) || (selection == -1)) {
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free (str);
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return NULL;
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} else {
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lines = selection - start;
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}
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if (lines>0) {
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for (i=0; str[i] && lines; i++)
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if (str[i]=='\n')
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lines--;
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ptr = str+i;
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for (i=0; ptr[i]; i++)
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if (ptr[i]=='\n') {
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ptr[i]='\0';
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break;
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}
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ptr = strdup (ptr);
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}
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free (str);
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}
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return ptr;
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}
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R_API char *r_file_slurp_line(const char *file, int line, int context) {
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int i, lines = 0;
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int sz;
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char *ptr = NULL, *str = r_file_slurp (file, &sz);
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// TODO: Implement context
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if (str) {
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for (i=0; str[i]; i++)
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if (str[i]=='\n')
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lines++;
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if (line > lines) {
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free (str);
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return NULL;
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}
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lines = line - 1;
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for (i=0; str[i]&&lines; i++)
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if (str[i]=='\n')
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lines--;
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ptr = str+i;
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for (i=0; ptr[i]; i++) {
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if (ptr[i]=='\n') {
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ptr[i]='\0';
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break;
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}
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}
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ptr = strdup (ptr);
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free (str);
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}
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return ptr;
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}
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R_API char *r_file_root(const char *root, const char *path) {
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char *ret, *s = r_str_replace (strdup (path), "..", "", 1);
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// XXX ugly hack
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while (strstr (s, "..")) s = r_str_replace (s, "..", "", 1);
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while (strstr (s, "./")) s = r_str_replace (s, "./", "", 1);
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while (strstr (s, "//")) s = r_str_replace (s, "//", "", 1);
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ret = r_str_concat (strdup (root), R_SYS_DIR);
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ret = r_str_concat (ret, s);
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free (s);
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return ret;
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}
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R_API bool r_file_dump(const char *file, const ut8 *buf, int len, int append) {
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FILE *fd;
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if (!file || !*file || !buf || len < 0) {
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eprintf ("r_file_dump file: %s buf: %p\n", file, buf);
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return false;
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}
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if (append) {
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fd = r_sandbox_fopen (file, "awb");
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} else {
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r_sys_truncate (file, 0);
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fd = r_sandbox_fopen (file, "wb");
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}
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if (fd == NULL) {
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eprintf ("Cannot open '%s' for writing\n", file);
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return false;
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}
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if (len < 0) {
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len = strlen ((const char *)buf);
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}
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if (fwrite (buf, len, 1, fd) != 1) {
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r_sys_perror ("r_file_dump: fwrite: error\n");
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fclose (fd);
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return false;
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}
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fclose (fd);
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return true;
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}
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R_API bool r_file_rm(const char *file) {
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if (r_sandbox_enable (0)) {
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return false;
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}
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if (r_file_is_directory (file)) {
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#if __WINDOWS__
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return !RemoveDirectory (file);
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#else
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return !rmdir (file);
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#endif
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} else {
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#if __WINDOWS__
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return !DeleteFile (file);
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#else
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return !unlink (file);
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#endif
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}
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}
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R_API char *r_file_readlink(const char *path) {
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if (!r_sandbox_enable (0)) {
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#if __UNIX__
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int ret;
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char pathbuf[4096] = {0};
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strncpy (pathbuf, path, sizeof (pathbuf) - 1);
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repeat:
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ret = readlink (path, pathbuf, sizeof (pathbuf)-1);
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if (ret != -1) {
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pathbuf[ret] = 0;
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path = pathbuf;
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goto repeat;
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}
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return strdup (pathbuf);
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#endif
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}
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return NULL;
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}
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R_API int r_file_mmap_write(const char *file, ut64 addr, const ut8 *buf, int len) {
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#if __WINDOWS__
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HANDLE fh;
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DWORD written = 0;
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if (r_sandbox_enable (0)) return -1;
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fh = CreateFile (file, GENERIC_READ|GENERIC_WRITE,
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FILE_SHARE_READ | FILE_SHARE_WRITE,
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NULL, OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, 0);
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if (fh == INVALID_HANDLE_VALUE) {
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r_sys_perror ("r_file_mmap_write: CreateFile");
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return -1;
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}
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// no need to overengineer the file write more
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#if 0
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HANDLE fm;
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fm = CreateFileMapping (fh, NULL,
|
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PAGE_READWRITE, 0, 0, NULL);
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if (fm == NULL) {
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r_sys_perror ("r_file_mmap_write: CreateFileMapping");
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CloseHandle (fh);
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return -1;
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}
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|
|
if (fm != INVALID_HANDLE_VALUE) {
|
|
MEMORY_BASIC_INFORMATION info;
|
|
ut8 *obuf = MapViewOfFile (fm,
|
|
FILE_MAP_WRITE,
|
|
0,0,
|
|
0);
|
|
VirtualQuery (obuf, &info, sizeof(info);
|
|
memcpy (obuf+addr, buf, len);
|
|
UnmapViewOfFile (obuf);
|
|
}
|
|
CloseHandle (fm);
|
|
#else
|
|
SetFilePointer (fh, addr, NULL, FILE_BEGIN);
|
|
if (!WriteFile (fh, buf, len, &written, NULL)) {
|
|
r_sys_perror ("WriteFile");
|
|
len = -1;
|
|
}
|
|
#endif
|
|
CloseHandle (fh);
|
|
return len;
|
|
#elif __UNIX__
|
|
int fd = r_sandbox_open (file, O_RDWR|O_SYNC, 0644);
|
|
const int pagesize = getpagesize ();
|
|
int mmlen = len + pagesize;
|
|
int rest = addr % pagesize;
|
|
ut8 *mmap_buf;
|
|
if (fd == -1) return -1;
|
|
if ((st64)addr < 0) return -1;
|
|
mmap_buf = mmap (NULL, mmlen*2, PROT_READ|PROT_WRITE,
|
|
MAP_SHARED, fd, (off_t)addr - rest);
|
|
if (((int)(size_t)mmap_buf)==-1)
|
|
return -1;
|
|
memcpy (mmap_buf+rest, buf, len);
|
|
munmap (mmap_buf, mmlen*2);
|
|
close (fd);
|
|
return len;
|
|
#else
|
|
return -1;
|
|
#endif
|
|
}
|
|
|
|
R_API int r_file_mmap_read (const char *file, ut64 addr, ut8 *buf, int len) {
|
|
#if __WINDOWS__
|
|
HANDLE fm, fh;
|
|
|
|
if (r_sandbox_enable (0)) return -1;
|
|
fh = CreateFile (file, GENERIC_READ,
|
|
FILE_SHARE_READ, NULL, OPEN_EXISTING, 0, 0);
|
|
|
|
if (fh == INVALID_HANDLE_VALUE) {
|
|
r_sys_perror ("CreateFile");
|
|
return -1;
|
|
}
|
|
|
|
fm = CreateFileMapping (fh, NULL,
|
|
PAGE_READONLY, 0, 0, NULL);
|
|
|
|
if (fm != INVALID_HANDLE_VALUE) {
|
|
ut8 *obuf = MapViewOfFile (fm,
|
|
FILE_MAP_READ,
|
|
0, 0, len);
|
|
memcpy (obuf, buf, len);
|
|
UnmapViewOfFile (obuf);
|
|
} else {
|
|
r_sys_perror ("CreateFileMapping");
|
|
CloseHandle (fh);
|
|
return -1;
|
|
}
|
|
CloseHandle (fh);
|
|
CloseHandle (fm);
|
|
return len;
|
|
#elif __UNIX__
|
|
int fd = r_sandbox_open (file, O_RDONLY, 0644);
|
|
const int pagesize = 4096;
|
|
int mmlen = len+pagesize;
|
|
int rest = addr%pagesize;
|
|
ut8 *mmap_buf;
|
|
if (fd == -1) return -1;
|
|
mmap_buf = mmap (NULL, mmlen*2, PROT_READ,
|
|
MAP_SHARED, fd, (off_t)addr-rest);
|
|
if (((int)(size_t)mmap_buf)==-1)
|
|
return -1;
|
|
memcpy (buf, mmap_buf+rest, len);
|
|
munmap (mmap_buf, mmlen*2);
|
|
close (fd);
|
|
return len;
|
|
#endif
|
|
return 0;
|
|
}
|
|
|
|
#if __UNIX__
|
|
static RMmap *r_file_mmap_unix (RMmap *m, int fd) {
|
|
ut8 empty = m->len == 0;
|
|
m->buf = mmap (NULL, (empty?1024:m->len) ,
|
|
m->rw?PROT_READ|PROT_WRITE:PROT_READ,
|
|
MAP_SHARED, fd, (off_t)m->base);
|
|
if (m->buf == MAP_FAILED) {
|
|
free (m);
|
|
m = NULL;
|
|
}
|
|
return m;
|
|
}
|
|
#elif __WINDOWS__
|
|
static RMmap *r_file_mmap_windows (RMmap *m, const char *file) {
|
|
m->fh = CreateFile (file, GENERIC_READ | (m->rw?GENERIC_WRITE:0),
|
|
FILE_SHARE_READ|(m->rw?FILE_SHARE_WRITE:0), NULL,
|
|
OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, 0);
|
|
if (m->fh == INVALID_HANDLE_VALUE) {
|
|
r_sys_perror ("CreateFile");
|
|
free (m);
|
|
return NULL;
|
|
}
|
|
m->fm = CreateFileMapping (m->fh, NULL,
|
|
PAGE_READONLY, 0, 0, NULL);
|
|
//m->rw?PAGE_READWRITE:PAGE_READONLY, 0, 0, NULL);
|
|
if (m->fm != INVALID_HANDLE_VALUE) {
|
|
m->buf = MapViewOfFile (m->fm,
|
|
// m->rw?(FILE_MAP_READ|FILE_MAP_WRITE):FILE_MAP_READ,
|
|
FILE_MAP_COPY,
|
|
UT32_HI (m->base), UT32_LO (m->base), 0);
|
|
} else {
|
|
r_sys_perror ("CreateFileMapping");
|
|
CloseHandle (m->fh);
|
|
free (m);
|
|
m = NULL;
|
|
}
|
|
return m;
|
|
}
|
|
#else
|
|
static RMmap *r_file_mmap_other (RMmap *m) {
|
|
ut8 empty = m->len == 0;
|
|
m->buf = malloc ((empty?1024:m->len));
|
|
if (!empty && m->buf) {
|
|
lseek (m->fd, (off_t)0, SEEK_SET);
|
|
read (m->fd, m->buf, m->len);
|
|
} else {
|
|
free (m);
|
|
m = NULL;
|
|
}
|
|
return m;
|
|
}
|
|
#endif
|
|
|
|
// TODO: add rwx support?
|
|
R_API RMmap *r_file_mmap (const char *file, bool rw, ut64 base) {
|
|
RMmap *m = NULL;
|
|
int fd = -1;
|
|
if (!rw && !r_file_exists (file)) return m;
|
|
fd = r_sandbox_open (file, rw? O_RDWR: O_RDONLY, 0644);
|
|
if (fd == -1 && !rw) {
|
|
eprintf ("r_file_mmap: file does not exis.\n");
|
|
//m->buf = malloc (m->len);
|
|
return m;
|
|
}
|
|
m = R_NEW (RMmap);
|
|
if (!m) {
|
|
if (fd != -1) close (fd);
|
|
return NULL;
|
|
}
|
|
m->base = base;
|
|
m->rw = rw;
|
|
m->fd = fd;
|
|
m->len = fd != -1? lseek (fd, (off_t)0, SEEK_END) : 0;
|
|
|
|
if (m->fd == -1) {
|
|
return m;
|
|
}
|
|
|
|
if (m->len == (off_t)-1) {
|
|
close (fd);
|
|
R_FREE (m);
|
|
return NULL;
|
|
}
|
|
#if __UNIX__
|
|
return r_file_mmap_unix (m, fd);
|
|
#elif __WINDOWS__
|
|
close (fd);
|
|
m->fd = -1;
|
|
return r_file_mmap_windows (m, file);
|
|
#else
|
|
return r_file_mmap_other (m);
|
|
#endif
|
|
}
|
|
|
|
R_API void r_file_mmap_free (RMmap *m) {
|
|
if (!m) return;
|
|
#if __WINDOWS__
|
|
if (m->fm != INVALID_HANDLE_VALUE)
|
|
CloseHandle (m->fm);
|
|
if (m->fh != INVALID_HANDLE_VALUE)
|
|
CloseHandle (m->fh);
|
|
if (m->buf)
|
|
UnmapViewOfFile (m->buf);
|
|
#endif
|
|
if (m->fd == -1) {
|
|
free (m);
|
|
return;
|
|
}
|
|
#if __UNIX__
|
|
munmap (m->buf, m->len);
|
|
#endif
|
|
close (m->fd);
|
|
free (m);
|
|
}
|
|
|
|
R_API char *r_file_temp (const char *prefix) {
|
|
int namesz;
|
|
char *name;
|
|
char *path = r_file_tmpdir ();
|
|
namesz = strlen (prefix) + strlen (path) + 32;
|
|
name = malloc (namesz);
|
|
snprintf (name, namesz, "%s/%s.%"PFMT64x, path, prefix, r_sys_now ());
|
|
free (path);
|
|
return name;
|
|
}
|
|
|
|
R_API int r_file_mkstemp (const char *prefix, char **oname) {
|
|
int h;
|
|
char *path = r_file_tmpdir ();
|
|
char name[1024];
|
|
#if __WINDOWS__
|
|
if (GetTempFileName (path, prefix, 0, name))
|
|
h = r_sandbox_open (name, O_RDWR|O_EXCL|O_BINARY, 0644);
|
|
else h = -1;
|
|
#else
|
|
mode_t mask;
|
|
snprintf (name, sizeof (name), "%s/%sXXXXXX", path, prefix);
|
|
mask = umask(S_IWGRP | S_IWOTH);
|
|
h = mkstemp (name);
|
|
umask(mask);
|
|
#endif
|
|
if (oname) *oname = (h!=-1)? strdup (name): NULL;
|
|
free (path);
|
|
return h;
|
|
}
|
|
|
|
R_API char *r_file_tmpdir() {
|
|
#if __WINDOWS__
|
|
char *path = r_sys_getenv ("TEMP");
|
|
if (!path) path = strdup ("C:\\WINDOWS\\Temp\\");
|
|
#elif __ANDROID__
|
|
char *path = strdup ("/data/data/org.radare2.installer/radare2/tmp");
|
|
#else
|
|
char *path = r_sys_getenv ("TMPDIR");
|
|
if (path && !*path) {
|
|
free (path);
|
|
path = NULL;
|
|
}
|
|
if (!path) path = strdup ("/tmp");
|
|
#endif
|
|
if (!r_file_is_directory (path)) {
|
|
eprintf ("Cannot find temporary directory '%s'\n", path);
|
|
}
|
|
return path;
|
|
}
|
|
|