Are there OSes which have but not ?
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I am currently pondering the presence of <sys/termios.h> on many systems, most of which have a symlink between it and <termios.h>, musl libc’s being a considerable exception: its <sys/termios.h> warns you that it’s wrong and to use <termios.h> instead.
On the BSDs, the actual file is in sys/ and the symlink in /usr/include, so one might have been historically excused for using this… but, giving that GNU autoconf’s AC_SYS_POSIX_TERMIOS does not look there (even though the configure.ac of a program I am looking at does use AC_CHECK_HEADERS([ … sys/termios.h … termios.h …]), I was wondering:
Is there any system in existence which has <sys/termios.h> with the usual suspects (tcgetattr, tcsetattr, cfgetospeed and related constants) but not <termios.h>?
Another piece of software I’m looking at only tries <termios.h> (both fall back to termio, one even to sgtty…), and I’m now trying to figure out whether I should patch one to also look at <sys/termios.h> (and probably the autoconf macro, too) or patch the other to not look there because it might be pointless.
c portability autoconf termios
edited Nov 8 at 7:03
JJJ
29k147591
asked Nov 8 at 2:59
mirabilos
3,4232855
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I am currently pondering the presence of <sys/termios.h> on many systems, most of which have a symlink between it and <termios.h>, musl libc’s being a considerable exception: its <sys/termios.h> warns you that it’s wrong and to use <termios.h> instead.
On the BSDs, the actual file is in sys/ and the symlink in /usr/include, so one might have been historically excused for using this… but, giving that GNU autoconf’s AC_SYS_POSIX_TERMIOS does not look there (even though the configure.ac of a program I am looking at does use AC_CHECK_HEADERS([ … sys/termios.h … termios.h …]), I was wondering:
Is there any system in existence which has <sys/termios.h> with the usual suspects (tcgetattr, tcsetattr, cfgetospeed and related constants) but not <termios.h>?
Another piece of software I’m looking at only tries <termios.h> (both fall back to termio, one even to sgtty…), and I’m now trying to figure out whether I should patch one to also look at <sys/termios.h> (and probably the autoconf macro, too) or patch the other to not look there because it might be pointless.
c portability autoconf termios
edited Nov 8 at 7:03
JJJ
29k147591
asked Nov 8 at 2:59
mirabilos
3,4232855
4
POSIX specifies<termios.h>, so any OS claiming conformance should have that.
– Barmar
Nov 8 at 3:03
Sure it does, but I was asking about portability, not about POSIX. This means especially to run on systems that predate or don’t implement POSIX.
– mirabilos
Nov 8 at 11:52
Much of POSIX simply made existing practice among Unix variants official. And where there was no concensus (i.e. hard split between AT&T and BSD), it frequently copped out and said that either method was conforming.
– Barmar
Nov 8 at 16:08
Sure, but this is deliberately an archæology question, for portability to ancient weird systems someone may have around at VCFe or in some emulator. I know enough people dealing in those, but not experts like the autoconf people (e.g. @BrunoHaible) who know whether there was a system in existence that did so-and-so.
– mirabilos
Nov 8 at 20:29
1
I used the file search at TUHS. SysIII seems to be the earliest incarnation of<termio.h>(note the lack of an S), which<termios.h>was heavily based upon, though it lacked "the usual suspects" and was apparently used withioctlinstead. I dug around for older TTY-related files/functions the site had (other than termcap), and it seems that you'd be looking at using<sgtty.h>, notably on BSD systems before<sys/termios.h>. My guess is that<sys/termios.h>is/was a BSD thing; other systems POSIX-correctly have it installed as<termios.h>
– Chrono Kitsune
Nov 15 at 5:44
add a comment |
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0
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up vote
0
down vote
favorite
I am currently pondering the presence of <sys/termios.h> on many systems, most of which have a symlink between it and <termios.h>, musl libc’s being a considerable exception: its <sys/termios.h> warns you that it’s wrong and to use <termios.h> instead.
On the BSDs, the actual file is in sys/ and the symlink in /usr/include, so one might have been historically excused for using this… but, giving that GNU autoconf’s AC_SYS_POSIX_TERMIOS does not look there (even though the configure.ac of a program I am looking at does use AC_CHECK_HEADERS([ … sys/termios.h … termios.h …]), I was wondering:
Is there any system in existence which has <sys/termios.h> with the usual suspects (tcgetattr, tcsetattr, cfgetospeed and related constants) but not <termios.h>?
Another piece of software I’m looking at only tries <termios.h> (both fall back to termio, one even to sgtty…), and I’m now trying to figure out whether I should patch one to also look at <sys/termios.h> (and probably the autoconf macro, too) or patch the other to not look there because it might be pointless.
c portability autoconf termios
edited Nov 8 at 7:03
JJJ
29k147591
asked Nov 8 at 2:59
mirabilos
3,4232855
I am currently pondering the presence of <sys/termios.h> on many systems, most of which have a symlink between it and <termios.h>, musl libc’s being a considerable exception: its <sys/termios.h> warns you that it’s wrong and to use <termios.h> instead.
On the BSDs, the actual file is in sys/ and the symlink in /usr/include, so one might have been historically excused for using this… but, giving that GNU autoconf’s AC_SYS_POSIX_TERMIOS does not look there (even though the configure.ac of a program I am looking at does use AC_CHECK_HEADERS([ … sys/termios.h … termios.h …]), I was wondering:
Is there any system in existence which has <sys/termios.h> with the usual suspects (tcgetattr, tcsetattr, cfgetospeed and related constants) but not <termios.h>?
Another piece of software I’m looking at only tries <termios.h> (both fall back to termio, one even to sgtty…), and I’m now trying to figure out whether I should patch one to also look at <sys/termios.h> (and probably the autoconf macro, too) or patch the other to not look there because it might be pointless.
c portability autoconf termios
c portability autoconf termios
edited Nov 8 at 7:03
JJJ
29k147591
asked Nov 8 at 2:59
mirabilos
3,4232855
edited Nov 8 at 7:03
JJJ
29k147591
asked Nov 8 at 2:59
mirabilos
3,4232855
edited Nov 8 at 7:03
JJJ
29k147591
edited Nov 8 at 7:03
JJJ
29k147591
edited Nov 8 at 7:03
JJJ
29k147591
29k147591
asked Nov 8 at 2:59
mirabilos
3,4232855
asked Nov 8 at 2:59
mirabilos
3,4232855
asked Nov 8 at 2:59
mirabilos
3,4232855
3,4232855
4
POSIX specifies<termios.h>, so any OS claiming conformance should have that.
– Barmar
Nov 8 at 3:03
Sure it does, but I was asking about portability, not about POSIX. This means especially to run on systems that predate or don’t implement POSIX.
– mirabilos
Nov 8 at 11:52
Much of POSIX simply made existing practice among Unix variants official. And where there was no concensus (i.e. hard split between AT&T and BSD), it frequently copped out and said that either method was conforming.
– Barmar
Nov 8 at 16:08
Sure, but this is deliberately an archæology question, for portability to ancient weird systems someone may have around at VCFe or in some emulator. I know enough people dealing in those, but not experts like the autoconf people (e.g. @BrunoHaible) who know whether there was a system in existence that did so-and-so.
– mirabilos
Nov 8 at 20:29
1
I used the file search at TUHS. SysIII seems to be the earliest incarnation of<termio.h>(note the lack of an S), which<termios.h>was heavily based upon, though it lacked "the usual suspects" and was apparently used withioctlinstead. I dug around for older TTY-related files/functions the site had (other than termcap), and it seems that you'd be looking at using<sgtty.h>, notably on BSD systems before<sys/termios.h>. My guess is that<sys/termios.h>is/was a BSD thing; other systems POSIX-correctly have it installed as<termios.h>
– Chrono Kitsune
Nov 15 at 5:44
add a comment |
4
POSIX specifies<termios.h>, so any OS claiming conformance should have that.
– Barmar
Nov 8 at 3:03
Sure it does, but I was asking about portability, not about POSIX. This means especially to run on systems that predate or don’t implement POSIX.
– mirabilos
Nov 8 at 11:52
Much of POSIX simply made existing practice among Unix variants official. And where there was no concensus (i.e. hard split between AT&T and BSD), it frequently copped out and said that either method was conforming.
– Barmar
Nov 8 at 16:08
Sure, but this is deliberately an archæology question, for portability to ancient weird systems someone may have around at VCFe or in some emulator. I know enough people dealing in those, but not experts like the autoconf people (e.g. @BrunoHaible) who know whether there was a system in existence that did so-and-so.
– mirabilos
Nov 8 at 20:29
1
I used the file search at TUHS. SysIII seems to be the earliest incarnation of<termio.h>(note the lack of an S), which<termios.h>was heavily based upon, though it lacked "the usual suspects" and was apparently used withioctlinstead. I dug around for older TTY-related files/functions the site had (other than termcap), and it seems that you'd be looking at using<sgtty.h>, notably on BSD systems before<sys/termios.h>. My guess is that<sys/termios.h>is/was a BSD thing; other systems POSIX-correctly have it installed as<termios.h>
– Chrono Kitsune
Nov 15 at 5:44
4
4
POSIX specifies
<termios.h>, so any OS claiming conformance should have that.– Barmar
Nov 8 at 3:03
POSIX specifies
<termios.h>, so any OS claiming conformance should have that.– Barmar
Nov 8 at 3:03
Sure it does, but I was asking about portability, not about POSIX. This means especially to run on systems that predate or don’t implement POSIX.
– mirabilos
Nov 8 at 11:52
Sure it does, but I was asking about portability, not about POSIX. This means especially to run on systems that predate or don’t implement POSIX.
– mirabilos
Nov 8 at 11:52
Much of POSIX simply made existing practice among Unix variants official. And where there was no concensus (i.e. hard split between AT&T and BSD), it frequently copped out and said that either method was conforming.
– Barmar
Nov 8 at 16:08
Much of POSIX simply made existing practice among Unix variants official. And where there was no concensus (i.e. hard split between AT&T and BSD), it frequently copped out and said that either method was conforming.
– Barmar
Nov 8 at 16:08
Sure, but this is deliberately an archæology question, for portability to ancient weird systems someone may have around at VCFe or in some emulator. I know enough people dealing in those, but not experts like the autoconf people (e.g. @BrunoHaible) who know whether there was a system in existence that did so-and-so.
– mirabilos
Nov 8 at 20:29
Sure, but this is deliberately an archæology question, for portability to ancient weird systems someone may have around at VCFe or in some emulator. I know enough people dealing in those, but not experts like the autoconf people (e.g. @BrunoHaible) who know whether there was a system in existence that did so-and-so.
– mirabilos
Nov 8 at 20:29
1
1
I used the file search at TUHS. SysIII seems to be the earliest incarnation of
<termio.h> (note the lack of an S), which <termios.h> was heavily based upon, though it lacked "the usual suspects" and was apparently used with ioctl instead. I dug around for older TTY-related files/functions the site had (other than termcap), and it seems that you'd be looking at using <sgtty.h>, notably on BSD systems before <sys/termios.h>. My guess is that <sys/termios.h> is/was a BSD thing; other systems POSIX-correctly have it installed as <termios.h>– Chrono Kitsune
Nov 15 at 5:44
I used the file search at TUHS. SysIII seems to be the earliest incarnation of
<termio.h> (note the lack of an S), which <termios.h> was heavily based upon, though it lacked "the usual suspects" and was apparently used with ioctl instead. I dug around for older TTY-related files/functions the site had (other than termcap), and it seems that you'd be looking at using <sgtty.h>, notably on BSD systems before <sys/termios.h>. My guess is that <sys/termios.h> is/was a BSD thing; other systems POSIX-correctly have it installed as <termios.h>– Chrono Kitsune
Nov 15 at 5:44
add a comment |
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4
POSIX specifies
<termios.h>, so any OS claiming conformance should have that.– Barmar
Nov 8 at 3:03
Sure it does, but I was asking about portability, not about POSIX. This means especially to run on systems that predate or don’t implement POSIX.
– mirabilos
Nov 8 at 11:52
Much of POSIX simply made existing practice among Unix variants official. And where there was no concensus (i.e. hard split between AT&T and BSD), it frequently copped out and said that either method was conforming.
– Barmar
Nov 8 at 16:08
Sure, but this is deliberately an archæology question, for portability to ancient weird systems someone may have around at VCFe or in some emulator. I know enough people dealing in those, but not experts like the autoconf people (e.g. @BrunoHaible) who know whether there was a system in existence that did so-and-so.
– mirabilos
Nov 8 at 20:29
1
I used the file search at TUHS. SysIII seems to be the earliest incarnation of
<termio.h>(note the lack of an S), which<termios.h>was heavily based upon, though it lacked "the usual suspects" and was apparently used withioctlinstead. I dug around for older TTY-related files/functions the site had (other than termcap), and it seems that you'd be looking at using<sgtty.h>, notably on BSD systems before<sys/termios.h>. My guess is that<sys/termios.h>is/was a BSD thing; other systems POSIX-correctly have it installed as<termios.h>– Chrono Kitsune
Nov 15 at 5:44