R Under development (unstable) (2018-09-21 r75341) -- "Unsuffered Consequences"
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Platform: x86_64-pc-linux-gnu (64-bit)

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> ## tests of options in system() and system2.
> 
> options(warn = 1)
> 
> opts <- list("", NULL, FALSE, TRUE, "o1.txt", "o2.txt")
> outs <- c("o1.txt", "o2.txt")
> tos <- c(0, 10)
> 
> process <- function(res)
+ {
+     unlink(outs)
+     if(is.character(res)) {
+         cat("value:\n")
+         writeLines(res)
+     }
+     for(f in outs)
+         if(file.exists(f)) {
+             cat(f, ":\n", sep = "")
+             writeLines(readLines(f))
+         }
+ }
> 
> for(to in tos)
+     for(out in opts)
+         for(err in opts) {
+             ## skip this for the sake of Unix-alikes
+             if(identical(err, TRUE) && !identical(out,TRUE)) next
+             cat(sprintf("\ntesting stdout = %s, stderr = %s\n",
+                 deparse(out), deparse(err)))
+             process(system2("test-system2", stdout = out, stderr = err,
+                             timeout = to))
+         }

testing stdout = "", stderr = ""
stdout 1
stderr 1

testing stdout = "", stderr = NULL
stdout 1

testing stdout = "", stderr = FALSE
stdout 1

testing stdout = "", stderr = "o1.txt"
stdout 1
o1.txt:
stderr 1

testing stdout = "", stderr = "o2.txt"
stdout 1
o2.txt:
stderr 1

testing stdout = NULL, stderr = ""
stderr 1

testing stdout = NULL, stderr = NULL

testing stdout = NULL, stderr = FALSE

testing stdout = NULL, stderr = "o1.txt"
o1.txt:
stderr 1

testing stdout = NULL, stderr = "o2.txt"
o2.txt:
stderr 1

testing stdout = FALSE, stderr = ""
stderr 1

testing stdout = FALSE, stderr = NULL

testing stdout = FALSE, stderr = FALSE

testing stdout = FALSE, stderr = "o1.txt"
o1.txt:
stderr 1

testing stdout = FALSE, stderr = "o2.txt"
o2.txt:
stderr 1

testing stdout = TRUE, stderr = ""
stderr 1
value:
stdout 1

testing stdout = TRUE, stderr = NULL
value:
stdout 1

testing stdout = TRUE, stderr = FALSE
value:
stdout 1

testing stdout = TRUE, stderr = TRUE
value:
stdout 1
stderr 1

testing stdout = TRUE, stderr = "o1.txt"
value:
stdout 1
o1.txt:
stderr 1

testing stdout = TRUE, stderr = "o2.txt"
value:
stdout 1
o2.txt:
stderr 1

testing stdout = "o1.txt", stderr = ""
stderr 1
o1.txt:
stdout 1

testing stdout = "o1.txt", stderr = NULL
o1.txt:
stdout 1

testing stdout = "o1.txt", stderr = FALSE
o1.txt:
stdout 1

testing stdout = "o1.txt", stderr = "o1.txt"
o1.txt:
stdout 1
stderr 1

testing stdout = "o1.txt", stderr = "o2.txt"
o1.txt:
stdout 1
o2.txt:
stderr 1

testing stdout = "o2.txt", stderr = ""
stderr 1
o2.txt:
stdout 1

testing stdout = "o2.txt", stderr = NULL
o2.txt:
stdout 1

testing stdout = "o2.txt", stderr = FALSE
o2.txt:
stdout 1

testing stdout = "o2.txt", stderr = "o1.txt"
o1.txt:
stderr 1
o2.txt:
stdout 1

testing stdout = "o2.txt", stderr = "o2.txt"
o2.txt:
stdout 1
stderr 1

testing stdout = "", stderr = ""
stdout 1
stderr 1

testing stdout = "", stderr = NULL
stdout 1

testing stdout = "", stderr = FALSE
stdout 1

testing stdout = "", stderr = "o1.txt"
stdout 1
o1.txt:
stderr 1

testing stdout = "", stderr = "o2.txt"
stdout 1
o2.txt:
stderr 1

testing stdout = NULL, stderr = ""
stderr 1

testing stdout = NULL, stderr = NULL

testing stdout = NULL, stderr = FALSE

testing stdout = NULL, stderr = "o1.txt"
o1.txt:
stderr 1

testing stdout = NULL, stderr = "o2.txt"
o2.txt:
stderr 1

testing stdout = FALSE, stderr = ""
stderr 1

testing stdout = FALSE, stderr = NULL

testing stdout = FALSE, stderr = FALSE

testing stdout = FALSE, stderr = "o1.txt"
o1.txt:
stderr 1

testing stdout = FALSE, stderr = "o2.txt"
o2.txt:
stderr 1

testing stdout = TRUE, stderr = ""
stderr 1
value:
stdout 1

testing stdout = TRUE, stderr = NULL
value:
stdout 1

testing stdout = TRUE, stderr = FALSE
value:
stdout 1

testing stdout = TRUE, stderr = TRUE
value:
stdout 1
stderr 1

testing stdout = TRUE, stderr = "o1.txt"
value:
stdout 1
o1.txt:
stderr 1

testing stdout = TRUE, stderr = "o2.txt"
value:
stdout 1
o2.txt:
stderr 1

testing stdout = "o1.txt", stderr = ""
stderr 1
o1.txt:
stdout 1

testing stdout = "o1.txt", stderr = NULL
o1.txt:
stdout 1

testing stdout = "o1.txt", stderr = FALSE
o1.txt:
stdout 1

testing stdout = "o1.txt", stderr = "o1.txt"
o1.txt:
stdout 1
stderr 1

testing stdout = "o1.txt", stderr = "o2.txt"
o1.txt:
stdout 1
o2.txt:
stderr 1

testing stdout = "o2.txt", stderr = ""
stderr 1
o2.txt:
stdout 1

testing stdout = "o2.txt", stderr = NULL
o2.txt:
stdout 1

testing stdout = "o2.txt", stderr = FALSE
o2.txt:
stdout 1

testing stdout = "o2.txt", stderr = "o1.txt"
o1.txt:
stderr 1
o2.txt:
stdout 1

testing stdout = "o2.txt", stderr = "o2.txt"
o2.txt:
stdout 1
stderr 1
> 
> for(to in tos) {
+     # timeout 0 uses different implementations from timeout 10
+     # the outputs should be identical
+ 
+     process(system("test-system2", timeout = to))
+     process(system("test-system2", ignore.stdout = TRUE, timeout = to))
+     process(system("test-system2", ignore.stderr = TRUE, timeout = to))
+     process(system("test-system2", ignore.stdout = TRUE, ignore.stderr = TRUE,
+                    timeout = to))
+ 
+     process(system("test-system2", TRUE, timeout = to))
+     process(system("test-system2", TRUE, ignore.stdout = TRUE, timeout = to))
+     process(system("test-system2", TRUE, ignore.stdout = TRUE,
+                    ignore.stderr = TRUE, timeout = to))
+ 
+     process(system2("test-system2", "1", input=letters[1:4], timeout = to))
+     process(system2("test-system2", "1", input=letters[1:4], stdout = TRUE,
+                     timeout = to))
+ 
+     process(system("test-system2 1", input=letters[1:4], timeout = to))
+     process(system("test-system2 1", input=letters[1:4], intern = TRUE,
+                    timeout = to))
+ 
+     tmp <- tempfile()
+     writeLines(letters[5:7], tmp)
+     process(system2("test-system2", "1", stdin = tmp, timeout = to))
+     process(system2("test-system2", "1", stdin = tmp, stdout = TRUE,
+                     timeout = to))
+     process(system2("test-system2", "1", stdin = tmp, stdout = TRUE,
+                     stderr = TRUE, timeout = to))
+     process(system2("test-system2", "1", stdin = tmp, stdout = "o1.txt",
+                     stderr = "o1.txt", timeout = to))
+     process(system2("test-system2", "1", stdin = tmp, stdout = "o1.txt",
+                     stderr = "o2.txt", timeout = to))
+ 
+     unlink(c(tmp, outs))
+ 
+     print(system("test-system2 5", timeout = to))
+     system("test-system2 6", intern = TRUE, timeout = to)
+     print(system2("test-system2", "7", timeout = to))
+     system2("test-system2", "8", stdout=TRUE, timeout = to)
+ }
stdout 1
stderr 1
stderr 1
stdout 1
stderr 1
value:
stdout 1
stderr 1
value:
value:
stdout 1
stderr 1
stdin: a
stdin: b
stdin: c
stdin: d
stderr 1
value:
stdout 1
stdin: a
stdin: b
stdin: c
stdin: d
stdout 1
stderr 1
stdin: a
stdin: b
stdin: c
stdin: d
stderr 1
value:
stdout 1
stdin: a
stdin: b
stdin: c
stdin: d
stdout 1
stderr 1
stdin: e
stdin: f
stdin: g
stderr 1
value:
stdout 1
stdin: e
stdin: f
stdin: g
value:
stdout 1
stderr 1
stdin: e
stdin: f
stdin: g
o1.txt:
stdout 1
stderr 1
stdin: e
stdin: f
stdin: g
o1.txt:
stdout 1
stdin: e
stdin: f
stdin: g
o2.txt:
stderr 1
stdout 1
stderr 1
[1] 5
stderr 1
Warning in system("test-system2 6", intern = TRUE, timeout = to) :
  running command 'test-system2 6' had status 6
stdout 1
stderr 1
[1] 7
stderr 1
Warning in system2("test-system2", "8", stdout = TRUE, timeout = to) :
  running command ''test-system2' 8' had status 8
stdout 1
stderr 1
stderr 1
stdout 1
stderr 1
value:
stdout 1
stderr 1
value:
value:
stdout 1
stderr 1
stdin: a
stdin: b
stdin: c
stdin: d
stderr 1
value:
stdout 1
stdin: a
stdin: b
stdin: c
stdin: d
stdout 1
stderr 1
stdin: a
stdin: b
stdin: c
stdin: d
stderr 1
value:
stdout 1
stdin: a
stdin: b
stdin: c
stdin: d
stdout 1
stderr 1
stdin: e
stdin: f
stdin: g
stderr 1
value:
stdout 1
stdin: e
stdin: f
stdin: g
value:
stdout 1
stderr 1
stdin: e
stdin: f
stdin: g
o1.txt:
stdout 1
stderr 1
stdin: e
stdin: f
stdin: g
o1.txt:
stdout 1
stdin: e
stdin: f
stdin: g
o2.txt:
stderr 1
stdout 1
stderr 1
[1] 5
stderr 1
Warning in system("test-system2 6", intern = TRUE, timeout = to) :
  running command 'test-system2 6' had status 6
stdout 1
stderr 1
[1] 7
stderr 1
Warning in system2("test-system2", "8", stdout = TRUE, timeout = to) :
  running command ''test-system2' 8' had status 8
> 
> # tests that time out
> #   (each runs for a second)
> 
> system("./test-system2 sleep 10", timeout = 1)
stdout 1
stderr 1
Sleeping for 10 seconds...
Warning in system("./test-system2 sleep 10", timeout = 1) :
  command './test-system2 sleep 10' timed out after 1s
> system("./test-system2 infinite_loop", timeout = 1)
stdout 1
stderr 1
Going to infinite loop...
Warning in system("./test-system2 infinite_loop", timeout = 1) :
  command './test-system2 infinite_loop' timed out after 1s
> system("./test-system2 sleep 10", timeout = 1, intern = T)
stderr 1
Warning in system("./test-system2 sleep 10", timeout = 1, intern = T) :
  command './test-system2 sleep 10' timed out after 1s
[1] "stdout 1"                   "Sleeping for 10 seconds..."
attr(,"status")
[1] 124
> system("./test-system2 infinite_loop", timeout = 1, intern = T)
stderr 1
Warning in system("./test-system2 infinite_loop", timeout = 1, intern = T) :
  command './test-system2 infinite_loop' timed out after 1s
[1] "stdout 1"                  "Going to infinite loop..."
attr(,"status")
[1] 124
> 
> ## test results with timeout set
> 
> stopifnot(identical(system("./test-system2 2", timeout = 1), 2L))
stdout 1
stderr 1
> stopifnot(identical(system("./test-system2 2", timeout = 1, intern = T),
+                     structure("stdout 1", status = 2L)))
stderr 1
Warning in system("./test-system2 2", timeout = 1, intern = T) :
  running command './test-system2 2' had status 2
>