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   exec.3p    ( 3 )

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Примеры (Examples)

Using execl()
       The following example executes the ls command, specifying the
       pathname of the executable (/bin/ls) and using arguments supplied
       directly to the command to produce single-column output.

           #include <unistd.h>

           int ret;
           ...
           ret = execl ("/bin/ls", "ls", "-1", (char *)0);

   Using execle()
       The following example is similar to Using execl().  In addition,
       it specifies the environment for the new process image using the
       env argument.

           #include <unistd.h>

           int ret;
           char *env[] = { "HOME=/usr/home", "LOGNAME=home", (char *)0 };
           ...
           ret = execle ("/bin/ls", "ls", "-l", (char *)0, env);

   Using execlp()
       The following example searches for the location of the ls command
       among the directories specified by the PATH environment variable.

           #include <unistd.h>

           int ret;
           ...
           ret = execlp ("ls", "ls", "-l", (char *)0);

   Using execv()
       The following example passes arguments to the ls command in the
       cmd array.

           #include <unistd.h>

           int ret;
           char *cmd[] = { "ls", "-l", (char *)0 };
           ...
           ret = execv ("/bin/ls", cmd);

   Using execve()
       The following example passes arguments to the ls command in the
       cmd array, and specifies the environment for the new process
       image using the env argument.

           #include <unistd.h>

           int ret;
           char *cmd[] = { "ls", "-l", (char *)0 };
           char *env[] = { "HOME=/usr/home", "LOGNAME=home", (char *)0 };
           ...
           ret = execve ("/bin/ls", cmd, env);

   Using execvp()
       The following example searches for the location of the ls command
       among the directories specified by the PATH environment variable,
       and passes arguments to the ls command in the cmd array.

           #include <unistd.h>

           int ret;
           char *cmd[] = { "ls", "-l", (char *)0 };
           ...
           ret = execvp ("ls", cmd);