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Cet article a fait l'objet d'une traduction automatique. Déplacez votre pointeur sur les phrases de l'article pour voir la version originale de ce texte. Informations supplémentaires.
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Traduction
Source
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_exec, fonctions de _wexec
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_texecl |
_execl |
_execl |
_wexecl |
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_texecle |
_execle |
_execle |
_wexecle |
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_texeclp |
_execlp |
_execlp |
_wexeclp |
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_texeclpe |
_execlpe |
_execlpe |
_wexeclpe |
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_texecv |
_execv |
_execv |
_wexecv |
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_texecve |
_execve |
_execve |
_wexecve |
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_texecvp |
_execvp |
_execvp |
_wexecvp |
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_texecvpe |
_execvpe |
_execvpe |
_wexecvpe |
Remarque
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Note de sécurité
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// crt_args.c
// Illustrates the following variables used for accessing
// command-line arguments and environment variables:
// argc argv envp
// This program will be executed by crt_exec which follows.
#include <stdio.h>
int main( int argc, // Number of strings in array argv
char *argv[], // Array of command-line argument strings
char **envp ) // Array of environment variable strings
{
int count;
// Display each command-line argument.
printf( "\nCommand-line arguments:\n" );
for( count = 0; count < argc; count++ )
printf( " argv[%d] %s\n", count, argv[count] );
// Display each environment variable.
printf( "\nEnvironment variables:\n" );
while( *envp != NULL )
printf( " %s\n", *(envp++) );
return;
}
// crt_exec.c
// Illustrates the different versions of exec, including
// _execl _execle _execlp _execlpe
// _execv _execve _execvp _execvpe
//
// Although CRT_EXEC.C can exec any program, you can verify how
// different versions handle arguments and environment by
// compiling and specifying the sample program CRT_ARGS.C. See
// "_spawn, _wspawn Functions" for examples of the similar spawn
// functions.
#include <stdio.h>
#include <conio.h>
#include <process.h>
char *my_env[] = // Environment for exec?e
{
"THIS=environment will be",
"PASSED=to new process by",
"the EXEC=functions",
NULL
};
int main( int ac, char* av[] )
{
char *args[4];
int ch;
if( ac != 3 ){
fprintf( stderr, "Usage: %s <program> <number (1-8)>\n", av[0] );
return;
}
// Arguments for _execv?
args[0] = av[1];
args[1] = "exec??";
args[2] = "two";
args[3] = NULL;
switch( atoi( av[2] ) )
{
case 1:
_execl( av[1], av[1], "_execl", "two", NULL );
break;
case 2:
_execle( av[1], av[1], "_execle", "two", NULL, my_env );
break;
case 3:
_execlp( av[1], av[1], "_execlp", "two", NULL );
break;
case 4:
_execlpe( av[1], av[1], "_execlpe", "two", NULL, my_env );
break;
case 5:
_execv( av[1], args );
break;
case 6:
_execve( av[1], args, my_env );
break;
case 7:
_execvp( av[1], args );
break;
case 8:
_execvpe( av[1], args, my_env );
break;
default:
break;
}
// This point is reached only if exec fails.
printf( "\nProcess was not execed." );
exit( 0 );
}
