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|
/*
* (c) 2008 Steve Bennett <steveb@workware.net.au>
*
* Implements the file command for jim
*
* The FreeBSD license
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE JIM TCL PROJECT ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* JIM TCL PROJECT OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* The views and conclusions contained in the software and documentation
* are those of the authors and should not be interpreted as representing
* official policies, either expressed or implied, of the Jim Tcl Project.
*
* Based on code originally from Tcl 6.7:
*
* Copyright 1987-1991 Regents of the University of California
* Permission to use, copy, modify, and distribute this
* software and its documentation for any purpose and without
* fee is hereby granted, provided that the above copyright
* notice appear in all copies. The University of California
* makes no representations about the suitability of this
* software for any purpose. It is provided "as is" without
* express or implied warranty.
*/
#include <limits.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <unistd.h>
#include <errno.h>
#include <sys/stat.h>
#include <sys/param.h>
#include "jim.h"
#include "jim-subcmd.h"
/*
*----------------------------------------------------------------------
*
* GetFileType --
*
* Given a mode word, returns a string identifying the type of a
* file.
*
* Results:
* A static text string giving the file type from mode.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
static const char *GetFileType(int mode)
{
if (S_ISREG(mode)) {
return "file";
} else if (S_ISDIR(mode)) {
return "directory";
} else if (S_ISCHR(mode)) {
return "characterSpecial";
} else if (S_ISBLK(mode)) {
return "blockSpecial";
} else if (S_ISFIFO(mode)) {
return "fifo";
} else if (S_ISLNK(mode)) {
return "link";
} else if (S_ISSOCK(mode)) {
return "socket";
}
return "unknown";
}
/*
*----------------------------------------------------------------------
*
* StoreStatData --
*
* This is a utility procedure that breaks out the fields of a
* "stat" structure and stores them in textual form into the
* elements of an associative array.
*
* Results:
* Returns a standard Tcl return value. If an error occurs then
* a message is left in interp->result.
*
* Side effects:
* Elements of the associative array given by "varName" are modified.
*
*----------------------------------------------------------------------
*/
static int set_array_int_value(Jim_Interp *interp, Jim_Obj *container, const char *key, jim_wide value)
{
Jim_Obj *nameobj = Jim_NewStringObj(interp, key, -1);
Jim_Obj *valobj = Jim_NewWideObj(interp, value);
if (Jim_SetDictKeysVector(interp, container, &nameobj, 1, valobj) != JIM_OK) {
Jim_FreeObj(interp, nameobj);
Jim_FreeObj(interp, valobj);
return JIM_ERR;
}
return JIM_OK;
}
static int set_array_string_value(Jim_Interp *interp, Jim_Obj *container, const char *key, const char *value)
{
Jim_Obj *nameobj = Jim_NewStringObj(interp, key, -1);
Jim_Obj *valobj = Jim_NewStringObj(interp, value, -1);
if (Jim_SetDictKeysVector(interp, container, &nameobj, 1, valobj) != JIM_OK) {
Jim_FreeObj(interp, nameobj);
Jim_FreeObj(interp, valobj);
return JIM_ERR;
}
return JIM_OK;
}
static int
StoreStatData(Jim_Interp *interp, Jim_Obj *varName, const struct stat *sb)
{
if (set_array_int_value(interp, varName, "dev", sb->st_dev) != JIM_OK) {
Jim_SetResult(interp, Jim_NewEmptyStringObj(interp));
Jim_AppendStrings(interp, Jim_GetResult(interp), "can't set \"", Jim_GetString(varName, NULL), "(dev)\": variable isn't array", NULL);
return JIM_ERR;
}
set_array_int_value(interp, varName, "ino", sb->st_ino);
set_array_int_value(interp, varName, "mode", sb->st_mode);
set_array_int_value(interp, varName, "nlink", sb->st_nlink);
set_array_int_value(interp, varName, "uid", sb->st_uid);
set_array_int_value(interp, varName, "gid", sb->st_gid);
set_array_int_value(interp, varName, "size", sb->st_size);
set_array_int_value(interp, varName, "atime", sb->st_atime);
set_array_int_value(interp, varName, "mtime", sb->st_mtime);
set_array_int_value(interp, varName, "ctime", sb->st_ctime);
set_array_string_value(interp, varName, "type", GetFileType((int) sb->st_mode));
/* And also return the value */
Jim_SetResult(interp, Jim_GetVariable(interp, varName, 0));
return JIM_OK;
}
static int file_cmd_dirname(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
{
const char *path = Jim_GetString(argv[0], NULL);
const char *p = strrchr(path, '/');
if (!p) {
Jim_SetResultString(interp, ".", -1);
}
else if (p == path) {
Jim_SetResultString(interp, "/", -1);
}
else {
Jim_SetResultString(interp, path, p - path);
}
return JIM_OK;
}
static int file_cmd_rootname(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
{
const char *path = Jim_GetString(argv[0], NULL);
const char *lastSlash = strrchr(path, '/');
const char *p = strrchr(path, '.');
if (p == NULL || (lastSlash != NULL && lastSlash > p)) {
Jim_SetResult(interp, argv[0]);
}
else {
Jim_SetResultString(interp, path, p - path);
}
return JIM_OK;
}
static int file_cmd_extension(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
{
const char *path = Jim_GetString(argv[0], NULL);
const char *lastSlash = strrchr(path, '/');
const char *p = strrchr(path, '.');
if (p == NULL || (lastSlash != NULL && lastSlash >= p)) {
p = "";
}
Jim_SetResultString(interp, p, -1);
return JIM_OK;
}
static int file_cmd_tail(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
{
const char *path = Jim_GetString(argv[0], NULL);
const char *lastSlash = strrchr(path, '/');
if (lastSlash) {
Jim_SetResultString(interp, lastSlash + 1, -1);
}
else {
Jim_SetResult(interp, argv[0]);
}
return JIM_OK;
}
static int file_cmd_normalize(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
{
const char *path = Jim_GetString(argv[0], NULL);
char *newname = Jim_Alloc(MAXPATHLEN + 1);
if (realpath(path, newname)) {
Jim_SetResult(interp, Jim_NewStringObjNoAlloc(interp, newname, -1));
}
else {
Jim_Free(newname);
Jim_SetResult(interp, argv[0]);
}
return JIM_OK;
}
static int file_cmd_join(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
{
int i;
char *newname = Jim_Alloc(MAXPATHLEN + 1);
char *last = newname;
*newname = 0;
/* Simple implementation for now */
for (i = 0; i < argc; i++) {
int len;
const char *part = Jim_GetString(argv[i], &len);
if (*part == '/') {
/* Absolute component, so go back to the start */
last = newname;
}
/* Add a slash if needed */
if (last != newname) {
*last++ = '/';
}
if (len) {
if (last + len - newname >= MAXPATHLEN) {
Jim_Free(newname);
Jim_SetResultString(interp, "Path too long", -1);
return JIM_ERR;
}
memcpy(last, part, len);
last += len;
}
/* Remove a slash if needed */
if (last != newname && last[-1] == '/') {
*--last = 0;
}
}
*last = 0;
/* Probably need to handle some special cases ...*/
Jim_SetResult(interp, Jim_NewStringObjNoAlloc(interp, newname, last - newname));
return JIM_OK;
}
static int file_access(Jim_Interp *interp, Jim_Obj *filename, int mode)
{
const char *path = Jim_GetString(filename, NULL);
int rc = access(path, mode);
Jim_SetResult(interp, Jim_NewIntObj(interp, rc != -1));
return JIM_OK;
}
static int file_cmd_readable(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
{
return file_access(interp, argv[0], R_OK);
}
static int file_cmd_writable(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
{
return file_access(interp, argv[0], W_OK);
}
static int file_cmd_executable(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
{
return file_access(interp, argv[0], X_OK);
}
static int file_cmd_exists(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
{
return file_access(interp, argv[0], F_OK);
}
static int file_cmd_delete(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
{
while (argc--) {
const char *path = Jim_GetString(argv[0], NULL);
if (unlink(path) == -1 && errno != ENOENT) {
Jim_SetResult(interp, Jim_NewEmptyStringObj(interp));
Jim_AppendStrings(interp, Jim_GetResult(interp), "couldn't delete \"", path, "\"", NULL);
return JIM_ERR;
}
argv++;
}
return JIM_OK;
}
static int mkdir_all(const char *path)
{
/* REVISIT: create intermediate dirs if necessary */
mkdir(path, 0755);
return 0;
}
static int file_cmd_mkdir(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
{
while (argc--) {
mkdir_all(Jim_GetString(argv[0], NULL));
argv++;
}
return JIM_OK;
}
static int file_cmd_rename(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
{
const char *source = Jim_GetString(argv[0], NULL);
const char *dest;
int force = 0;
if (argc == 3) {
if (strcmp(source, "-force") != 0) {
return -1;
}
force++;
source = Jim_GetString(argv[1], NULL);
}
dest = Jim_GetString(argv[force + 1], NULL);
if (!force && access(dest, F_OK) == 0) {
Jim_SetResultString(interp, "", 0);
Jim_AppendStrings(interp, Jim_GetResult(interp), "error renaming \"", source, "\" to \"", dest, "\": ", strerror(errno), NULL);
return JIM_ERR;
}
if (rename(source, dest) != 0) {
Jim_SetResultString(interp, "", 0);
Jim_AppendStrings(interp, Jim_GetResult(interp), "error renaming \"", source, "\": ", strerror(errno), NULL);
return JIM_ERR;
}
return JIM_OK;
}
static int file_stat(Jim_Interp *interp, Jim_Obj *filename, struct stat *sb)
{
const char *path = Jim_GetString(filename, NULL);
if (stat(path, sb) == -1) {
Jim_SetResult(interp, Jim_NewEmptyStringObj(interp));
Jim_AppendStrings(interp, Jim_GetResult(interp), "could not read \"", path, "\": ", strerror(errno), NULL);
return JIM_ERR;
}
return JIM_OK;
}
static int file_lstat(Jim_Interp *interp, Jim_Obj *filename, struct stat *sb)
{
const char *path = Jim_GetString(filename, NULL);
if (lstat(path, sb) == -1) {
Jim_SetResult(interp, Jim_NewEmptyStringObj(interp));
Jim_AppendStrings(interp, Jim_GetResult(interp), "could not read \"", path, "\": ", strerror(errno), NULL);
return JIM_ERR;
}
return JIM_OK;
}
static int file_cmd_atime(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
{
struct stat sb;
if (file_stat(interp, argv[0], &sb) != JIM_OK) {
return JIM_ERR;
}
Jim_SetResultInt(interp, sb.st_atime);
return JIM_OK;
}
static int file_cmd_mtime(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
{
struct stat sb;
if (file_stat(interp, argv[0], &sb) != JIM_OK) {
return JIM_ERR;
}
Jim_SetResultInt(interp, sb.st_mtime);
return JIM_OK;
}
static int file_cmd_size(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
{
struct stat sb;
if (file_stat(interp, argv[0], &sb) != JIM_OK) {
return JIM_ERR;
}
Jim_SetResultInt(interp, sb.st_size);
return JIM_OK;
}
static int file_cmd_isdirectory(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
{
struct stat sb;
int ret = 0;
if (file_stat(interp, argv[0], &sb) == JIM_OK) {
ret = S_ISDIR(sb.st_mode);
}
Jim_SetResultInt(interp, ret);
return JIM_OK;
}
static int file_cmd_isfile(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
{
struct stat sb;
int ret = 0;
if (file_stat(interp, argv[0], &sb) == JIM_OK) {
ret = S_ISREG(sb.st_mode);
}
Jim_SetResultInt(interp, ret);
return JIM_OK;
}
static int file_cmd_owned(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
{
struct stat sb;
int ret = 0;
if (file_stat(interp, argv[0], &sb) == JIM_OK) {
ret = (geteuid() == sb.st_uid);
}
Jim_SetResultInt(interp, ret);
return JIM_OK;
}
#ifdef S_IFLNK
static int file_cmd_readlink(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
{
const char *path = Jim_GetString(argv[0], NULL);
char *linkValue = Jim_Alloc(MAXPATHLEN + 1);
int linkLength = readlink(path, linkValue, MAXPATHLEN);
if (linkLength == -1) {
Jim_Free(linkValue);
Jim_SetResult(interp, Jim_NewEmptyStringObj(interp));
Jim_AppendStrings(interp, Jim_GetResult(interp), "couldn't readlink \"", path, "\"", NULL);
return JIM_ERR;
}
linkValue[linkLength] = 0;
Jim_SetResult(interp, Jim_NewStringObjNoAlloc(interp, linkValue, linkLength));
return JIM_OK;
}
#endif
static int file_cmd_type(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
{
struct stat sb;
if (file_lstat(interp, argv[0], &sb) != JIM_OK) {
return JIM_ERR;
}
Jim_SetResultString(interp, GetFileType((int)sb.st_mode), -1);
return JIM_OK;
}
static int file_cmd_lstat(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
{
struct stat sb;
if (file_lstat(interp, argv[0], &sb) != JIM_OK) {
return JIM_ERR;
}
return StoreStatData(interp, argv[1], &sb);
}
static int file_cmd_stat(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
{
struct stat sb;
if (file_stat(interp, argv[0], &sb) != JIM_OK) {
return JIM_ERR;
}
return StoreStatData(interp, argv[1], &sb);
}
static const jim_subcmd_type command_table[] = {
{ .cmd = "atime",
.args = "name",
.function = file_cmd_atime,
.minargs = 1,
.maxargs = 1,
.description = "Last access time"
},
{ .cmd = "mtime",
.args = "name",
.function = file_cmd_mtime,
.minargs = 1,
.maxargs = 1,
.description = "Last modification time"
},
{ .cmd = "dirname",
.args = "name",
.function = file_cmd_dirname,
.minargs = 1,
.maxargs = 1,
.description = "Directory part of the name"
},
{ .cmd = "rootname",
.args = "name",
.function = file_cmd_rootname,
.minargs = 1,
.maxargs = 1,
.description = "Name without any extension"
},
{ .cmd = "extension",
.args = "name",
.function = file_cmd_extension,
.minargs = 1,
.maxargs = 1,
.description = "Last extension including the dot"
},
{ .cmd = "tail",
.args = "name",
.function = file_cmd_tail,
.minargs = 1,
.maxargs = 1,
.description = "Last component of the name"
},
{ .cmd = "normalize",
.args = "name",
.function = file_cmd_normalize,
.minargs = 1,
.maxargs = 1,
.description = "Normalized path of name"
},
{ .cmd = "join",
.args = "name ?name ...?",
.function = file_cmd_join,
.minargs = 1,
.maxargs = -1,
.description = "Join multiple path components"
},
{ .cmd = "readable",
.args = "name",
.function = file_cmd_readable,
.minargs = 1,
.maxargs = 1,
.description = "Is file readable"
},
{ .cmd = "writable",
.args = "name",
.function = file_cmd_writable,
.minargs = 1,
.maxargs = 1,
.description = "Is file writable"
},
{ .cmd = "executable",
.args = "name",
.function = file_cmd_executable,
.minargs = 1,
.maxargs = 1,
.description = "Is file executable"
},
{ .cmd = "exists",
.args = "name",
.function = file_cmd_exists,
.minargs = 1,
.maxargs = 1,
.description = "Does file exist"
},
{ .cmd = "delete",
.args = "name ...",
.function = file_cmd_delete,
.minargs = 1,
.maxargs = -1,
.description = "Deletes the file(s)"
},
{ .cmd = "mkdir",
.args = "dir ...",
.function = file_cmd_mkdir,
.minargs = 1,
.maxargs = -1,
.description = "Creates the directories"
},
{ .cmd = "rename",
.args = "?-force? source dest",
.function = file_cmd_rename,
.minargs = 2,
.maxargs = 3,
.description = "Renames a file"
},
#ifdef S_IFLNK
{ .cmd = "readlink",
.args = "name",
.function = file_cmd_readlink,
.minargs = 1,
.maxargs = 1,
.description = "Value of the symbolic link"
},
#endif
{ .cmd = "size",
.args = "name",
.function = file_cmd_size,
.minargs = 1,
.maxargs = 1,
.description = "Size of file"
},
{ .cmd = "stat",
.args = "name var",
.function = file_cmd_stat,
.minargs = 2,
.maxargs = 2,
.description = "Stores results of stat in var array"
},
{ .cmd = "lstat",
.args = "name var",
.function = file_cmd_lstat,
.minargs = 2,
.maxargs = 2,
.description = "Stores results of lstat in var array"
},
{ .cmd = "type",
.args = "name",
.function = file_cmd_type,
.minargs = 1,
.maxargs = 1,
.description = "Returns type of the file"
},
{ .cmd = "owned",
.args = "name",
.function = file_cmd_owned,
.minargs = 1,
.maxargs = 1,
.description = "Returns 1 if owned by the current owner"
},
{ .cmd = "isdirectory",
.args = "name",
.function = file_cmd_isdirectory,
.minargs = 1,
.maxargs = 1,
.description = "Returns 1 if name is a directory"
},
{ .cmd = "isfile",
.args = "name",
.function = file_cmd_isfile,
.minargs = 1,
.maxargs = 1,
.description = "Returns 1 if name is a file"
},
{
.cmd = 0
}
};
static int Jim_CdCmd(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
{
const char *path;
if (argc != 2) {
Jim_WrongNumArgs(interp, 1, argv, "dirname");
return JIM_ERR;
}
path = Jim_GetString(argv[1], NULL);
if (chdir(path) != 0) {
Jim_SetResultString(interp, "", 0);
Jim_AppendStrings(interp, Jim_GetResult(interp),
"couldn't change working directory to \"", path, "\": ", strerror(errno), NULL);
return JIM_ERR;
}
return JIM_OK;
}
static int Jim_PwdCmd(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
{
const int cwd_len=2048;
char *cwd=malloc(cwd_len);
if (getcwd(cwd, cwd_len) == NULL) {
Jim_SetResultString(interp, "Failed to get pwd", -1);
return JIM_ERR;
}
Jim_SetResultString(interp, cwd, -1);
free(cwd);
return JIM_OK;
}
int Jim_fileInit(Jim_Interp *interp)
{
if (Jim_PackageProvide(interp, "file", "1.0", JIM_ERRMSG) != JIM_OK) {
return JIM_ERR;
}
Jim_CreateCommand(interp, "file", Jim_SubCmdProc, (void *)command_table, NULL);
Jim_CreateCommand(interp, "pwd", Jim_PwdCmd, NULL, NULL);
Jim_CreateCommand(interp, "cd", Jim_CdCmd, NULL, NULL);
return JIM_OK;
}
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