Steve Graegert wrote:
On 3/7/07, Prasanta Sadhukhan <Prasanta.Sadhukhan@xxxxxxx> wrote:
Hi,
When I tried the following program
void test4()
{
printf("doing execv\n");
if(execv("/bin/ls", "-l") == -1)
printf("exec failed with errno %d\n", errno);
else
printf("exec succeed\n");
}
Prasanta,
A NULL terminated array of arguments must be passed to execv(2) as the
prototype indicates: int execv(const char *path, char *const argv[]);
For example:
#include <unistd.h>
char *cmd[] = { "ls", "-l", NULL };
int result = execv ("/bin/ls", cmd);
An error of EFAULT usually means that an argument points to an illegal
address.
\Steve
Thanks Steve... If I have a string like this sprintf(str,
"-Xparameter:%d %s, value, command"), how to make it NULL terminated. Is
this declaration char *cmd[] = {str, NULL} and invocation
execv(path, cmd) correct?
Regards
Prasanta
--
Steve Grägert <steve@xxxxxxxxxxxx>
Jabber xmpp://graegerts@xxxxxxxxxx
Internet http://eth0.graegert.com, http://blog.graegert.com
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