# File src/library/base/R/windows/system.R
# Part of the R package, https://www.R-project.org
#
# Copyright (C) 1995-2014 The R Core Team
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# A copy of the GNU General Public License is available at
# https://www.R-project.org/Licenses/
system <- function(command, intern = FALSE,
ignore.stdout = FALSE, ignore.stderr = FALSE,
wait = TRUE, input = NULL,
show.output.on.console = TRUE, minimized = FALSE,
invisible = TRUE)
{
if(!is.logical(intern) || is.na(intern))
stop("'intern' must be TRUE or FALSE")
if(!is.logical(ignore.stdout) || is.na(ignore.stdout))
stop("'ignore.stdout' must be TRUE or FALSE")
if(!is.logical(ignore.stderr) || is.na(ignore.stderr))
stop("'ignore.stderr' must be TRUE or FALSE")
if(!is.logical(wait) || is.na(wait))
stop("'wait' must be TRUE or FALSE")
if(!is.logical(show.output.on.console) || is.na(show.output.on.console))
stop("'show.output.on.console' must be TRUE or FALSE")
if(!is.logical(minimized) || is.na(minimized))
stop("'minimized' must be TRUE or FALSE")
if(!is.logical(invisible) || is.na(invisible))
stop("'invisible' must be TRUE or FALSE")
stdout <- ifelse(ignore.stdout, FALSE, "")
stderr <- ifelse(ignore.stderr, FALSE, "")
f <- ""
if (!is.null(input)) {
f <- tempfile()
on.exit(unlink(f))
# cat(input, file = f, sep="\n")
writeLines(input, f)
}
if (intern) {
flag <- 3L
## documented to capture stderr also on Rgui
if(stdout == "") stdout <- TRUE
if(!ignore.stderr && .Platform$GUI == "Rgui") stderr <- TRUE
} else {
flag <- if (wait) ifelse(show.output.on.console, 2L, 1L) else 0L
}
if (invisible) flag <- 20L + flag
else if (minimized) flag <- 10L + flag
.Internal(system(command, as.integer(flag), f, stdout, stderr))
}
system2 <- function(command, args = character(),
stdout = "", stderr = "", stdin = "", input = NULL,
env = character(),
wait = TRUE, minimized = FALSE, invisible = TRUE)
{
if(!is.logical(wait) || is.na(wait))
stop("'wait' must be TRUE or FALSE")
if(!is.logical(minimized) || is.na(minimized))
stop("'minimized' must be TRUE or FALSE")
if(!is.logical(invisible) || is.na(invisible))
stop("'invisible' must be TRUE or FALSE")
command <- paste(c(shQuote(command), env, args), collapse = " ")
if(is.null(stdout)) stdout <- FALSE
if(is.null(stderr)) stderr <- FALSE
if (!is.null(input)) {
f <- tempfile()
on.exit(unlink(f))
# cat(input, file = f, sep="\n")
writeLines(input, f)
} else f <- stdin
flag <- if (isTRUE(stdout) || isTRUE(stderr)) 3L
else if (wait) ifelse(identical(stdout, ""), 2L, 1L)
else 0L
if (invisible) flag <- 20L + flag
else if (minimized) flag <- 10L + flag
.Internal(system(command, flag, f, stdout, stderr))
}
shell <- function(cmd, shell, flag = "/c", intern = FALSE,
wait = TRUE, translate = FALSE, mustWork = FALSE, ...)
{
if(missing(shell)) {
shell <- Sys.getenv("R_SHELL")
if(!nzchar(shell)) shell <- Sys.getenv("COMSPEC")
}
if(missing(flag) &&
any(!is.na(pmatch(c("bash", "tcsh", "sh"), basename(shell)))))
flag <- "-c"
cmd0 <- cmd # for messages
if(translate) cmd <- chartr("/", "\\", cmd)
if(!is.null(shell)) cmd <- paste(shell, flag, cmd)
res <- system(cmd, intern = intern, wait = wait | intern,
show.output.on.console = wait, ...)
if(!intern && res && !is.na(mustWork))
if(mustWork)
if(res == -1L)
stop(gettextf("'%s' could not be run", cmd0), domain = NA)
else stop(gettextf("'%s' execution failed with error code %d",
cmd0, res), domain = NA)
else
if(res == -1L)
warning(gettextf("'%s' could not be run", cmd0), domain = NA)
else warning(gettextf("'%s' execution failed with error code %d",
cmd0, res), domain = NA)
if(intern) res else invisible(res)
}
shell.exec <- function(file) .Internal(shell.exec(file))
Sys.timezone <- function(location = TRUE)
{
tz <- Sys.getenv("TZ", names = FALSE)
if(nzchar(tz)) return(tz)
if(location) return(.Internal(tzone_name()))
z <- as.POSIXlt(Sys.time())
zz <- attr(z, "tzone")
if(length(zz) == 3L) zz[2L + z$isdst] else zz[1L]
}
Sys.which <- function(names) .Internal(Sys.which(as.character(names)))
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