60 lines
1.6 KiB
C
60 lines
1.6 KiB
C
/*
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* Copyright (c) 2011, 2012, 2013 Jonas 'Sortie' Termansen.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* unistd/execle.c
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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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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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