What does the “3am” section means in manpages?





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17















I found this accidentally.



I just typed man fork, and instead of showing the system call documentation, it showed to me an awk extension, however, the section page number was 3am, instead of just 3.



What does 3am means?






man







share|improve this question


















  • 8





    'Read it very early in the morning'.

    – bmargulies
    Mar 25 at 21:54






  • 2





    My first thought was something like unix.stackexchange.com/questions/405783/…

    – Justin Lardinois
    Mar 26 at 7:18


















17















I found this accidentally.



I just typed man fork, and instead of showing the system call documentation, it showed to me an awk extension, however, the section page number was 3am, instead of just 3.



What does 3am means?






man







share|improve this question


















  • 8





    'Read it very early in the morning'.

    – bmargulies
    Mar 25 at 21:54






  • 2





    My first thought was something like unix.stackexchange.com/questions/405783/…

    – Justin Lardinois
    Mar 26 at 7:18














17












17








17


1






I found this accidentally.



I just typed man fork, and instead of showing the system call documentation, it showed to me an awk extension, however, the section page number was 3am, instead of just 3.



What does 3am means?






man







share|improve this question














I found this accidentally.



I just typed man fork, and instead of showing the system call documentation, it showed to me an awk extension, however, the section page number was 3am, instead of just 3.



What does 3am means?






man




man






share|improve this question













share|improve this question











share|improve this question




share|improve this question










asked Mar 25 at 13:13









Peregring-lkPeregring-lk

293213




293213








  • 8





    'Read it very early in the morning'.

    – bmargulies
    Mar 25 at 21:54






  • 2





    My first thought was something like unix.stackexchange.com/questions/405783/…

    – Justin Lardinois
    Mar 26 at 7:18














  • 8





    'Read it very early in the morning'.

    – bmargulies
    Mar 25 at 21:54






  • 2





    My first thought was something like unix.stackexchange.com/questions/405783/…

    – Justin Lardinois
    Mar 26 at 7:18








8




8





'Read it very early in the morning'.

– bmargulies
Mar 25 at 21:54





'Read it very early in the morning'.

– bmargulies
Mar 25 at 21:54




2




2





My first thought was something like unix.stackexchange.com/questions/405783/…

– Justin Lardinois
Mar 26 at 7:18





My first thought was something like unix.stackexchange.com/questions/405783/…

– Justin Lardinois
Mar 26 at 7:18










1 Answer
1






active

oldest

votes


















17














It appears to be the manual page for a GNU Awk (gawk) extension module. The complete list is:



$ find /usr/share/man/man3 -name '*3am*' | xargs dpkg -S

gawk: /usr/share/man/man3/readfile.3am.gz

gawk: /usr/share/man/man3/inplace.3am.gz

gawk: /usr/share/man/man3/ordchr.3am.gz

gawk: /usr/share/man/man3/revoutput.3am.gz

gawk: /usr/share/man/man3/readdir.3am.gz

gawk: /usr/share/man/man3/filefuncs.3am.gz

gawk: /usr/share/man/man3/revtwoway.3am.gz

gawk: /usr/share/man/man3/time.3am.gz

gawk: /usr/share/man/man3/rwarray.3am.gz

gawk: /usr/share/man/man3/fork.3am.gz

gawk: /usr/share/man/man3/fnmatch.3am.gz


I would guess the am stands for awk module.






share|improve this answer



















  • 1





    In general, section 3 of the manual contains entries for library calls, which seems appropriate for gawk libraries, whereas fork() is carried out by the kernel and is therefore documented in section 2.

    – Kusalananda♦
    Mar 25 at 13:30








  • 2





    Yeah it seems that some libraries or "man page extensions" adds a postfix to the man page section number. In my system I've some prefixes like cpp, ssl or perl.

    – Peregring-lk
    Mar 25 at 15:09














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17














It appears to be the manual page for a GNU Awk (gawk) extension module. The complete list is:



$ find /usr/share/man/man3 -name '*3am*' | xargs dpkg -S

gawk: /usr/share/man/man3/readfile.3am.gz

gawk: /usr/share/man/man3/inplace.3am.gz

gawk: /usr/share/man/man3/ordchr.3am.gz

gawk: /usr/share/man/man3/revoutput.3am.gz

gawk: /usr/share/man/man3/readdir.3am.gz

gawk: /usr/share/man/man3/filefuncs.3am.gz

gawk: /usr/share/man/man3/revtwoway.3am.gz

gawk: /usr/share/man/man3/time.3am.gz

gawk: /usr/share/man/man3/rwarray.3am.gz

gawk: /usr/share/man/man3/fork.3am.gz

gawk: /usr/share/man/man3/fnmatch.3am.gz


I would guess the am stands for awk module.






share|improve this answer



















  • 1





    In general, section 3 of the manual contains entries for library calls, which seems appropriate for gawk libraries, whereas fork() is carried out by the kernel and is therefore documented in section 2.

    – Kusalananda♦
    Mar 25 at 13:30








  • 2





    Yeah it seems that some libraries or "man page extensions" adds a postfix to the man page section number. In my system I've some prefixes like cpp, ssl or perl.

    – Peregring-lk
    Mar 25 at 15:09


















17














It appears to be the manual page for a GNU Awk (gawk) extension module. The complete list is:



$ find /usr/share/man/man3 -name '*3am*' | xargs dpkg -S

gawk: /usr/share/man/man3/readfile.3am.gz

gawk: /usr/share/man/man3/inplace.3am.gz

gawk: /usr/share/man/man3/ordchr.3am.gz

gawk: /usr/share/man/man3/revoutput.3am.gz

gawk: /usr/share/man/man3/readdir.3am.gz

gawk: /usr/share/man/man3/filefuncs.3am.gz

gawk: /usr/share/man/man3/revtwoway.3am.gz

gawk: /usr/share/man/man3/time.3am.gz

gawk: /usr/share/man/man3/rwarray.3am.gz

gawk: /usr/share/man/man3/fork.3am.gz

gawk: /usr/share/man/man3/fnmatch.3am.gz


I would guess the am stands for awk module.






share|improve this answer



















  • 1





    In general, section 3 of the manual contains entries for library calls, which seems appropriate for gawk libraries, whereas fork() is carried out by the kernel and is therefore documented in section 2.

    – Kusalananda♦
    Mar 25 at 13:30








  • 2





    Yeah it seems that some libraries or "man page extensions" adds a postfix to the man page section number. In my system I've some prefixes like cpp, ssl or perl.

    – Peregring-lk
    Mar 25 at 15:09
















17












17








17







It appears to be the manual page for a GNU Awk (gawk) extension module. The complete list is:



$ find /usr/share/man/man3 -name '*3am*' | xargs dpkg -S

gawk: /usr/share/man/man3/readfile.3am.gz

gawk: /usr/share/man/man3/inplace.3am.gz

gawk: /usr/share/man/man3/ordchr.3am.gz

gawk: /usr/share/man/man3/revoutput.3am.gz

gawk: /usr/share/man/man3/readdir.3am.gz

gawk: /usr/share/man/man3/filefuncs.3am.gz

gawk: /usr/share/man/man3/revtwoway.3am.gz

gawk: /usr/share/man/man3/time.3am.gz

gawk: /usr/share/man/man3/rwarray.3am.gz

gawk: /usr/share/man/man3/fork.3am.gz

gawk: /usr/share/man/man3/fnmatch.3am.gz


I would guess the am stands for awk module.






share|improve this answer













It appears to be the manual page for a GNU Awk (gawk) extension module. The complete list is:



$ find /usr/share/man/man3 -name '*3am*' | xargs dpkg -S

gawk: /usr/share/man/man3/readfile.3am.gz

gawk: /usr/share/man/man3/inplace.3am.gz

gawk: /usr/share/man/man3/ordchr.3am.gz

gawk: /usr/share/man/man3/revoutput.3am.gz

gawk: /usr/share/man/man3/readdir.3am.gz

gawk: /usr/share/man/man3/filefuncs.3am.gz

gawk: /usr/share/man/man3/revtwoway.3am.gz

gawk: /usr/share/man/man3/time.3am.gz

gawk: /usr/share/man/man3/rwarray.3am.gz

gawk: /usr/share/man/man3/fork.3am.gz

gawk: /usr/share/man/man3/fnmatch.3am.gz


I would guess the am stands for awk module.







share|improve this answer












share|improve this answer



share|improve this answer










answered Mar 25 at 13:19









steeldriversteeldriver

37.7k45389




37.7k45389








  • 1





    In general, section 3 of the manual contains entries for library calls, which seems appropriate for gawk libraries, whereas fork() is carried out by the kernel and is therefore documented in section 2.

    – Kusalananda♦
    Mar 25 at 13:30








  • 2





    Yeah it seems that some libraries or "man page extensions" adds a postfix to the man page section number. In my system I've some prefixes like cpp, ssl or perl.

    – Peregring-lk
    Mar 25 at 15:09
















  • 1





    In general, section 3 of the manual contains entries for library calls, which seems appropriate for gawk libraries, whereas fork() is carried out by the kernel and is therefore documented in section 2.

    – Kusalananda♦
    Mar 25 at 13:30








  • 2





    Yeah it seems that some libraries or "man page extensions" adds a postfix to the man page section number. In my system I've some prefixes like cpp, ssl or perl.

    – Peregring-lk
    Mar 25 at 15:09










1




1





In general, section 3 of the manual contains entries for library calls, which seems appropriate for gawk libraries, whereas fork() is carried out by the kernel and is therefore documented in section 2.

– Kusalananda♦
Mar 25 at 13:30







In general, section 3 of the manual contains entries for library calls, which seems appropriate for gawk libraries, whereas fork() is carried out by the kernel and is therefore documented in section 2.

– Kusalananda♦
Mar 25 at 13:30






2




2





Yeah it seems that some libraries or "man page extensions" adds a postfix to the man page section number. In my system I've some prefixes like cpp, ssl or perl.

– Peregring-lk
Mar 25 at 15:09







Yeah it seems that some libraries or "man page extensions" adds a postfix to the man page section number. In my system I've some prefixes like cpp, ssl or perl.

– Peregring-lk
Mar 25 at 15:09




















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