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Write in binary mode through pipes

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On kLIBC, a child inherits a translation mode of stdio/stdout/stderr
of a parent. So if setting stdio handles of a parent to text mode,
a child reads CR+LF as LF and write LF to CR+LF. Especially, LF to
CR+LF conversion causes many troubles in UNIX programs.

Instead, if a child inherts a child inherit a current translation mode,
where stdin is text mode, stdout and stderr are binary mode, a child
would write LF as is.

This is the way for OS/2 to survive in UNIX jungle.

For example, 'make check' of libiconv fails due to mismatch of CR+LF
and LF.
This commit is contained in:
KO Myung-Hun 2016-12-14 19:55:19 +09:00
parent 2b9eed78a0
commit 18ff277047
1 changed files with 0 additions and 16 deletions
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16
os2.c
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@ -396,9 +396,6 @@ int execve(const char *name, char * const *argv, char * const *envp)
char sign[2];
char *rsp_argv[3];
char *rsp_name_arg;
int saved_stdin_mode;
int saved_stdout_mode;
int saved_stderr_mode;
int pid;
int status;
int fd;
@ -442,14 +439,6 @@ int execve(const char *name, char * const *argv, char * const *envp)
if (errno == ENOEXEC)
return -1;
/*
* On kLIBC, a child inherits a translation mode of stdin/stdout/stderr
* of a parent. Set stdin/stdout/stderr to a text mode, which is default.
*/
saved_stdin_mode = setmode(fileno(stdin), O_TEXT);
saved_stdout_mode = setmode(fileno(stdout), O_TEXT);
saved_stderr_mode = setmode(fileno(stderr), O_TEXT);
rsp_name_arg = make_response_file(argv);
if (rsp_name_arg) {
@ -465,11 +454,6 @@ int execve(const char *name, char * const *argv, char * const *envp)
if (rsp_name_arg)
afree(rsp_name_arg, ATEMP);
/* Restore a translation mode of stdin/stdout/stderr. */
setmode(fileno(stdin), saved_stdin_mode);
setmode(fileno(stdout), saved_stdout_mode);
setmode(fileno(stderr), saved_stderr_mode);
if (pid == -1) {
cleanup_temps();