From 8a365179eafdf3aea98e60ab9f5882b200d4c759 Mon Sep 17 00:00:00 2001 From: px4dev Date: Sat, 4 Aug 2012 15:12:36 -0700 Subject: Fresh import of the PX4 firmware sources. --- apps/nshlib/nsh_envcmds.c | 338 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 338 insertions(+) create mode 100644 apps/nshlib/nsh_envcmds.c (limited to 'apps/nshlib/nsh_envcmds.c') diff --git a/apps/nshlib/nsh_envcmds.c b/apps/nshlib/nsh_envcmds.c new file mode 100644 index 000000000..07b775517 --- /dev/null +++ b/apps/nshlib/nsh_envcmds.c @@ -0,0 +1,338 @@ +/**************************************************************************** + * apps/nshlib/nsh_envcmds.c + * + * Copyright (C) 2007-2009, 2011-2012 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt + * + * 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. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "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 + * COPYRIGHT OWNER 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. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include + +#include +#include +#include +#include +#include +#include + +#include "nsh.h" +#include "nsh_console.h" + +/**************************************************************************** + * Definitions + ****************************************************************************/ + +/**************************************************************************** + * Private Types + ****************************************************************************/ + +/**************************************************************************** + * Private Function Prototypes + ****************************************************************************/ + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +#if CONFIG_NFILE_DESCRIPTORS > 0 && !defined(CONFIG_DISABLE_ENVIRON) +static const char g_pwd[] = "PWD"; +static const char g_oldpwd[] = "OLDPWD"; +static const char g_home[] = CONFIG_LIB_HOMEDIR; +#endif + +/**************************************************************************** + * Public Data + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: nsh_getwd + ****************************************************************************/ + +#if CONFIG_NFILE_DESCRIPTORS > 0 && !defined(CONFIG_DISABLE_ENVIRON) +static inline FAR const char *nsh_getwd(const char *wd) +{ + const char *val; + + /* If no working directory is defined, then default to the home directory */ + + val = getenv(wd); + if (!val) + { + val = g_home; + } + return val; +} +#endif + +/**************************************************************************** + * Name: nsh_getdirpath + ****************************************************************************/ + +static inline char *nsh_getdirpath(FAR struct nsh_vtbl_s *vtbl, + const char *dirpath, const char *relpath) +{ + char *alloc; + int len; + + /* Handle the special case where the dirpath is simply "/" */ + + if (strcmp(dirpath, "/") == 0) + { + len = strlen(relpath) + 2; + alloc = (char*)malloc(len); + if (alloc) + { + sprintf(alloc, "/%s", relpath); + } + } + else + { + len = strlen(dirpath) + strlen(relpath) + 2; + alloc = (char*)malloc(len); + if (alloc) + { + sprintf(alloc, "%s/%s", dirpath, relpath); + } + } + + if (!alloc) + { + nsh_output(vtbl, g_fmtcmdoutofmemory, "nsh_getdirpath"); + } + return alloc; +} + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: nsh_getwd + ****************************************************************************/ + +#if CONFIG_NFILE_DESCRIPTORS > 0 && !defined(CONFIG_DISABLE_ENVIRON) +FAR const char *nsh_getcwd(void) +{ + return nsh_getwd(g_pwd); +} +#endif + +/**************************************************************************** + * Name: nsh_getfullpath + ****************************************************************************/ + +#if CONFIG_NFILE_DESCRIPTORS > 0 && !defined(CONFIG_DISABLE_ENVIRON) +char *nsh_getfullpath(FAR struct nsh_vtbl_s *vtbl, const char *relpath) +{ + const char *wd; + + /* Handle some special cases */ + + if (!relpath || relpath[0] == '\0') + { + /* No relative path provided */ + + return strdup(g_home); + } + else if (relpath[0] == '/') + { + return strdup(relpath); + } + + /* Get the path to the current working directory */ + + wd = nsh_getcwd(); + + /* Fake the '.' directory */ + + if (strcmp(relpath, ".") == 0) + { + return strdup(wd); + } + + /* Return the full path */ + + return nsh_getdirpath(vtbl, wd, relpath); +} +#endif + +/**************************************************************************** + * Name: nsh_freefullpath + ****************************************************************************/ + +#if CONFIG_NFILE_DESCRIPTORS > 0 && !defined(CONFIG_DISABLE_ENVIRON) +void nsh_freefullpath(char *relpath) +{ + if (relpath) + { + free(relpath); + } +} +#endif + +/**************************************************************************** + * Name: cmd_cd + ****************************************************************************/ + +#if CONFIG_NFILE_DESCRIPTORS > 0 && !defined(CONFIG_DISABLE_ENVIRON) +#ifndef CONFIG_NSH_DISABLE_CD +int cmd_cd(FAR struct nsh_vtbl_s *vtbl, int argc, char **argv) +{ + const char *path = argv[1]; + char *alloc = NULL; + char *fullpath = NULL; + int ret = OK; + + /* Check for special arguments */ + + if (argc < 2 || strcmp(path, "~") == 0) + { + path = g_home; + } + else if (strcmp(path, "-") == 0) + { + alloc = strdup(nsh_getwd(g_oldpwd)); + path = alloc; + } + else if (strcmp(path, "..") == 0) + { + alloc = strdup(nsh_getcwd()); + path = dirname(alloc); + } + else + { + fullpath = nsh_getfullpath(vtbl, path); + path = fullpath; + } + + /* Set the new workding directory */ + + ret = chdir(path); + if (ret != 0) + { + nsh_output(vtbl, g_fmtcmdfailed, argv[0], "chdir", NSH_ERRNO); + ret = ERROR; + } + + /* Free any memory that was allocated */ + + if (alloc) + { + free(alloc); + } + + if (fullpath) + { + nsh_freefullpath(fullpath); + } + return ret; +} +#endif +#endif + +/**************************************************************************** + * Name: cmd_echo + ****************************************************************************/ + +#ifndef CONFIG_NSH_DISABLE_ECHO +int cmd_echo(FAR struct nsh_vtbl_s *vtbl, int argc, char **argv) +{ + int i; + + /* echo each argument, separated by a space as it must have been on the + * command line + */ + + for (i = 1; i < argc; i++) + { + nsh_output(vtbl, "%s ", argv[i]); + } + nsh_output(vtbl, "\n"); + return OK; +} +#endif + +/**************************************************************************** + * Name: cmd_pwd + ****************************************************************************/ + +#if CONFIG_NFILE_DESCRIPTORS > 0 && !defined(CONFIG_DISABLE_ENVIRON) +#ifndef CONFIG_NSH_DISABLE_PWD +int cmd_pwd(FAR struct nsh_vtbl_s *vtbl, int argc, char **argv) +{ + nsh_output(vtbl, "%s\n", nsh_getcwd()); + return OK; +} +#endif +#endif + +/**************************************************************************** + * Name: cmd_set + ****************************************************************************/ + +#ifndef CONFIG_DISABLE_ENVIRON +#ifndef CONFIG_NSH_DISABLE_SET +int cmd_set(FAR struct nsh_vtbl_s *vtbl, int argc, char **argv) +{ + int ret = setenv(argv[1], argv[2], TRUE); + if (ret < 0) + { + nsh_output(vtbl, g_fmtcmdfailed, argv[0], "setenv", NSH_ERRNO); + } + return ret; +} +#endif +#endif + +/**************************************************************************** + * Name: cmd_unset + ****************************************************************************/ + +#ifndef CONFIG_DISABLE_ENVIRON +#ifndef CONFIG_NSH_DISABLE_UNSET +int cmd_unset(FAR struct nsh_vtbl_s *vtbl, int argc, char **argv) +{ + int ret = unsetenv(argv[1]); + if (ret < 0) + { + nsh_output(vtbl, g_fmtcmdfailed, argv[0], "unsetenv", NSH_ERRNO); + } + return ret; +} +#endif +#endif -- cgit v1.2.3