feat: update isatty libc function to use SYS_TERMINAL_ATTACHED syscall
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@@ -103,6 +103,7 @@ static inline long _zos_syscall4(long nr, long a1, long a2, long a3, long a4) {
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#define SYS_GETMILLISECONDS 14
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#define SYS_GETMILLISECONDS 14
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#define SYS_GETCHAR 18
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#define SYS_GETCHAR 18
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#define SYS_GETCHAR_NB 166
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#define SYS_GETCHAR_NB 166
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#define SYS_TERMINAL_ATTACHED 177
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#define SYS_SPAWN 20
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#define SYS_SPAWN 20
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#define SYS_WAITPID 23
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#define SYS_WAITPID 23
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#define SYS_GETARGS 25
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#define SYS_GETARGS 25
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@@ -2470,7 +2471,9 @@ char *getcwd(char *buf, size_t size) {
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}
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}
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int isatty(int fd) {
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int isatty(int fd) {
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return fd >= 0 && fd <= 2;
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if (fd < STDIN_FILENO || fd > STDERR_FILENO)
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return 0;
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return _zos_syscall0(SYS_TERMINAL_ATTACHED) != 0;
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}
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}
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/* ========================================================================
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/* ========================================================================
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