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Audit tty(1)

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1) Be strict about number of arguments passed
2) Use a simpler logic while returning
This commit is contained in:
FRIGN 2015-02-28 19:59:34 +01:00
parent e45297a320
commit b9b28d4039
2 changed files with 5 additions and 2 deletions
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2
README
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@ -78,7 +78,7 @@ The following tools are implemented ('*' == finished, '#' == UTF-8 support,
=* touch yes none =* touch yes none
#* tr yes none #* tr yes none
=*| true yes none =*| true yes none
=* tty yes none =*| tty yes none
=* uname yes none =* uname yes none
#* unexpand yes none #* unexpand yes none
=* uniq yes none =* uniq yes none

5
tty.c
View File

@ -20,8 +20,11 @@ main(int argc, char *argv[])
usage(); usage();
} ARGEND; } ARGEND;
if (argc)
usage();
tty = ttyname(STDIN_FILENO); tty = ttyname(STDIN_FILENO);
puts(tty ? tty : "not a tty"); puts(tty ? tty : "not a tty");
return tty ? 0 : 1; return !tty;
} }