Sys.getenv               package:base               R Documentation

_G_e_t _E_n_v_i_r_o_n_m_e_n_t _V_a_r_i_a_b_l_e_s

_D_e_s_c_r_i_p_t_i_o_n:

     'Sys.getenv' obtains the values of the environment variables named
     by 'x'.

_U_s_a_g_e:

     Sys.getenv(x)

_A_r_g_u_m_e_n_t_s:

       x: a character vector, or missing

_V_a_l_u_e:

     A vector of the same length as 'x', with the variable names as its
     'names' attribute.  Each element holds the value of the
     environment variable named by the corresponding component of 'x'
     (or '""' if no environment variable with that name was found).

     On most platforms 'Sys.getenv()' will return a named vector giving
     the values of all the environment variables.

_S_e_e _A_l_s_o:

     'Sys.putenv', 'Sys.getlocale' for the locale "environment",
     'getwd' for the working directory.

_E_x_a_m_p_l_e_s:

     ## whether HOST is set will be shell-dependent e.g. Solaris' csh does not.
     Sys.getenv(c("R_HOME", "R_PAPERSIZE", "R_PRINTCMD", "HOST"))

     str(s <- Sys.getenv()) # all settings (rather do not print)

     ## Language and Locale settings -- but rather use Sys.getlocale()
     s[grep("^L(C|ANG)", names(s))]

