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| author | Vladimir Azarov <avm@intermediate-node.net> | 2024-10-01 15:47:05 +0200 |
|---|---|---|
| committer | Vladimir Azarov <avm@intermediate-node.net> | 2024-10-01 15:47:05 +0200 |
| commit | 4abab5ad6c8465a7528ccdd5f49367da05f78bbd (patch) | |
| tree | ebf009bf1376a5a223a915bc27cbbd791a1316bc /src/unistd/isatty.c | |
Initial version
Diffstat (limited to 'src/unistd/isatty.c')
| -rw-r--r-- | src/unistd/isatty.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/src/unistd/isatty.c b/src/unistd/isatty.c new file mode 100644 index 0000000..75a9c18 --- /dev/null +++ b/src/unistd/isatty.c @@ -0,0 +1,13 @@ +#include <unistd.h> +#include <errno.h> +#include <sys/ioctl.h> +#include "syscall.h" + +int isatty(int fd) +{ + struct winsize wsz; + unsigned long r = syscall(SYS_ioctl, fd, TIOCGWINSZ, &wsz); + if (r == 0) return 1; + if (errno != EBADF) errno = ENOTTY; + return 0; +} |