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sortix--sortix/libc/execvpe.cpp
Jonas 'Sortie' Termansen 1444683ea8 Refactor kernel VFS.
Note: This is an incompatible ABI change.
2013-12-17 14:30:24 +01:00

52 lines
1.8 KiB
C++

/*******************************************************************************
Copyright(C) Jonas 'Sortie' Termansen 2011, 2012.
This file is part of the Sortix C Library.
The Sortix C Library is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 3 of the License, or (at your
option) any later version.
The Sortix C Library is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
License for more details.
You should have received a copy of the GNU Lesser General Public License
along with the Sortix C Library. If not, see <http://www.gnu.org/licenses/>.
execvpe.cpp
Loads a process image.
*******************************************************************************/
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#if defined(PLATFORM_X86)
#define CPUTYPE_STR "i486-sortix"
#elif defined(PLATFORM_X64)
#define CPUTYPE_STR "x86_64-sortix"
#else
#error No cputype environmental variable provided here.
#endif
// Note that the only PATH variable in Sortix is the one used here.
extern "C" int execvpe(const char* filename, char* const* argv,
char* const* envp)
{
if ( strchr(filename, '/') )
return execve(filename, argv, envp);
size_t filenamelen = strlen(filename);
const char* PATH = "/" CPUTYPE_STR "/bin";
size_t pathlen = strlen(PATH);
char* pathname = (char*) malloc(filenamelen + 1 + pathlen + 1);
if ( !pathname ) { return -1; }
stpcpy(stpcpy(stpcpy(pathname, PATH), "/"), filename);
int result = execve(pathname, argv, envp);
free(pathname);
return result;
}