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64 lines
1.8 KiB
C++
64 lines
1.8 KiB
C++
/*******************************************************************************
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Copyright(C) Jonas 'Sortie' Termansen 2011, 2012, 2013.
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This file is part of the Sortix C Library.
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The Sortix C Library is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation, either version 3 of the License, or (at your
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option) any later version.
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The Sortix C Library is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with the Sortix C Library. If not, see <http://www.gnu.org/licenses/>.
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unistd/execle.cpp
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Loads a program image.
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*******************************************************************************/
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#include <stdarg.h>
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#include <stdlib.h>
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#include <unistd.h>
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extern "C" int execle(const char* pathname, const char* argv0, ...)
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{
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if ( !argv0 )
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{
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va_list args;
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va_start(args, argv0);
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char* const* envp = va_arg(args, char* const*);
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va_end(args);
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return execve(pathname, (char* const*) &argv0, envp);
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}
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va_list args;
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va_start(args, argv0);
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size_t numargs = 1;
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while ( argv0 && va_arg(args, const char*) )
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numargs++;
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va_end(args);
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char** argv = (char**) malloc(sizeof(char*) * (numargs+1));
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if ( !argv )
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return -1;
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argv[0] = (char*) argv0;
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va_start(args, argv0);
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for ( size_t i = 1; i <= numargs; i++ )
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argv[i] = (char*) va_arg(args, const char*);
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char* const* envp = va_arg(args, char* const*);
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va_end(args);
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argv[numargs] = NULL;
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int result = execve(pathname, argv, envp);
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free(argv);
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return result;
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}
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