Compilare: user.c: In function ‘main’: user.c:33:2: warning: excess elements in scalar initializer [enabled by default] const char *argv={"/bin/ls","-1",NULL}; ^ user.c:33:2: warning: (near initialization for ‘argv’) [enabled by default] user.c:33:2: warning: excess elements in scalar initializer [enabled by default] user.c:33:2: warning: (near initialization for ‘argv’) [enabled by default] user.c:34:3: warning: passing argument 2 of ‘execve’ from incompatible pointer type [enabled by default] execve("/bin/ls",argv,evp); ^ In file included from user.c:3:0: /usr/include/unistd.h:552:12: note: expected ‘char * const*’ but argument is of type ‘const char *’ extern int execve (__const char *__path, char *__const __argv[], ^ user.c:34:3: warning: passing argument 3 of ‘execve’ from incompatible pointer type [enabled by default] execve("/bin/ls",argv,evp); ^ In file included from user.c:3:0: /usr/include/unistd.h:552:12: note: expected ‘char * const*’ but argument is of type ‘const char *’ extern int execve (__const char *__path, char *__const __argv[], ^ user.c:16:6: warning: unused variable ‘n’ [-Wunused-variable] int n; ^