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Diffstat (limited to 'nuttx/libc/unistd/lib_execv.c')
-rw-r--r-- | nuttx/libc/unistd/lib_execv.c | 152 |
1 files changed, 0 insertions, 152 deletions
diff --git a/nuttx/libc/unistd/lib_execv.c b/nuttx/libc/unistd/lib_execv.c deleted file mode 100644 index f4246a408..000000000 --- a/nuttx/libc/unistd/lib_execv.c +++ /dev/null @@ -1,152 +0,0 @@ -/**************************************************************************** - * libc/unistd/lib_execv.c - * - * Copyright (C) 2013 Gregory Nutt. All rights reserved. - * Author: Gregory Nutt <gnutt@nuttx.org> - * - * 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 <nuttx/config.h> - -#include <stdlib.h> -#include <unistd.h> -#include <errno.h> -#include <debug.h> - -#include <nuttx/binfmt/binfmt.h> - -#ifdef CONFIG_LIBC_EXECFUNCS - -/**************************************************************************** - * Pre-processor Definitions - ****************************************************************************/ - -/**************************************************************************** - * Private Variables - ****************************************************************************/ - -/**************************************************************************** - * Public Functions - ****************************************************************************/ - -/**************************************************************************** - * Name: execv - * - * Description: - * The standard 'exec' family of functions will replace the current process - * image with a new process image. The new image will be constructed from a - * regular, executable file called the new process image file. There will - * be no return from a successful exec, because the calling process image - * is overlaid by the new process image. - * - * Simplified 'execl()' and 'execv()' functions are provided by NuttX for - * compatibility. NuttX is a tiny embedded RTOS that does not support - * processes and hence the concept of overlaying a tasks process image with - * a new process image does not make any sense. In NuttX, these functions - * are wrapper functions that: - * - * 1. Call the non-standard binfmt function 'exec', and then - * 2. exit(0). - * - * Note the inefficiency when 'exec[l|v]()' is called in the normal, two- - * step process: (1) first call vfork() to create a new thread, then (2) - * call 'exec[l|v]()' to replace the new thread with a program from the - * file system. Since the new thread will be terminated by the - * 'exec[l|v]()' call, it really served no purpose other than to support - * Unix compatility. - * - * The non-standard binfmt function 'exec()' needs to have (1) a symbol - * table that provides the list of symbols exported by the base code, and - * (2) the number of symbols in that table. This information is currently - * provided to 'exec()' from 'exec[l|v]()' via NuttX configuration settings: - * - * CONFIG_LIBC_EXECFUNCS : Enable exec[l|v] support - * CONFIG_EXECFUNCS_HAVE_SYMTAB : Defined if there is a symbol table - * CONFIG_EXECFUNCS_SYMTAB : Symbol table used by exec[l|v] - * CONFIG_EXECFUNCS_NSYMBOLS : Number of symbols in the table - * - * As a result of the above, the current implementations of 'execl()' and - * 'execv()' suffer from some incompatibilities that may or may not be - * addressed in a future version of NuttX. Other than just being an - * inefficient use of MCU resource, the most serious of these is that - * the exec'ed task will not have the same task ID as the vfork'ed - * function. So the parent function cannot know the ID of the exec'ed - * task. - * - * Input Parameters: - * path - The path to the program to be executed. If CONFIG_BINFMT_EXEPATH - * is defined in the configuration, then this may be a relative path - * from the current working directory. Otherwise, path must be the - * absolute path to the program. - * argv - A pointer to an array of string arguments. The end of the - * array is indicated with a NULL entry. - * - * Returned Value: - * This function does not return on success. On failure, it will return - * -1 (ERROR) and will set the 'errno' value appropriately. - * - ****************************************************************************/ - -int execv(FAR const char *path, FAR char * const argv[]) -{ - FAR const struct symtab_s *symtab; - int nsymbols; - int ret; - - /* Get the current symbol table selection */ - - exec_getsymtab(&symtab, &nsymbols); - - /* Start the task */ - - ret = exec(path, (FAR char * const *)argv, symtab, nsymbols); - if (ret < 0) - { - sdbg("exec failed: %d\n", errno); - return ERROR; - } - - /* Then exit */ - - exit(0); - - /* We should not get here, but might be needed by some compilers. Other, - * smarter compilers might complain that this code is unreachable. You just - * can't win. - */ - - return ERROR; -} - -#endif /* CONFIG_LIBC_EXECFUNCS */ |