gnu

问题 I would like to have less display *.md markdown files with some formatting -- like I know less can, for manpages, etc. I am running Ubuntu 12.04. I am as far as putting a user defined filter into .lessfilter : #!/bin/sh case "$1" in *.md) fn=/tmp/$1.$$.html markdown "$1" | html2txt > $fn ### LOSES FORMATTING cat $fn ### TO STDOUT??? ;; *) # We don't handle this format exit 1 esac # No further processing by lesspipe necessary exit 0 So, the main questions are: How can I pass some basic

问题 I would like to have less display *.md markdown files with some formatting -- like I know less can, for manpages, etc. I am running Ubuntu 12.04. I am as far as putting a user defined filter into .lessfilter : #!/bin/sh case "$1" in *.md) fn=/tmp/$1.$$.html markdown "$1" | html2txt > $fn ### LOSES FORMATTING cat $fn ### TO STDOUT??? ;; *) # We don't handle this format exit 1 esac # No further processing by lesspipe necessary exit 0 So, the main questions are: How can I pass some basic

问题 I'd like to copy an executable ELF file via: $ objcopy -O binary myfile.elf myfile.bin Unfortunately: $ chmod +x myfile.bin $ ./myfile.bin results in: cannot execute binary file Is there any way to retain the files executability? 回答1: To be executable by the execve(2) syscall, a file usually has to be some elf(5) file (or some script, or some old a.out format). But see also binfmt_misc Your objcopy(1) command is loosing the essential meta-data in the ELF file. Maybe you want strip(1) Recall

问题 I'm trying to compile a very old code but I get this error while compiling the code Error: Syntax error in OPEN statement at (1) The code: WRITE(LUTTO,'('' TYPE NAME OF FILE CONTAINING INPUT : '',$)') C READ (LUTTI,'(Q,A)') NCHAR,FILNAM READ (LUTTI,'(A)') FILNAM NCHAR = len_trim(FILNAM) C ----- OPEN DATA FILE ----- print *, "NCHAR" OPEN( UNIT = LUINP, NAME = FILNAM(1:NCHAR), $ STATUS = 'OLD', RECL = 80 , $ CARRIAGECONTROL= 'LIST', ERR = 9900 ) 回答1: name=... in the open statement is invalid

问题 While using readline (blocking) for user input, I would like to output lines of text to the console asynchronously from another thread. Further, I would like that the readline prompt and current partial input line be removed from the console, the output line written, then the readline prompt and the partial user line restored - so as to give the appearance that the output was written "above" the prompt. By what combination of readline redisplay functions (or otherwise) can this be achieved?

问题 In my build chain, I need to do this: objcopy -I binary -O $BFDNAME -B $BFDARCH <this> <that> in order to get a binary file into library form. Because I want other people to be able to use this, I need to know how to get $BFDNAME and $BFDARCH from their toolchain when they run the build. I can get the values locally by running objdump -f against a file I've already built, but is there a better way which won't leave me compiling throw-away files just to get configuration values? 回答1: Thank you

问题 Strongly typed regexp constants is a handy tool that GNU Awk has. It is documented in GNU Awk User's Guide -> 6.1.2.2 Strongly Typed Regexp Constants and in there you can find interesting examples. From reading it, and comments to an answer I made up some examples that show those: $ cat file he;llo ho are you; $ gawk -v patt='@/;/' '$0 ~ patt' file # it prints those lines containing ";" he;llo you; In this case, we pass the pattern ";" with @/;/ and so it prints all the lines that contain ";"

问题 Strongly typed regexp constants is a handy tool that GNU Awk has. It is documented in GNU Awk User's Guide -> 6.1.2.2 Strongly Typed Regexp Constants and in there you can find interesting examples. From reading it, and comments to an answer I made up some examples that show those: $ cat file he;llo ho are you; $ gawk -v patt='@/;/' '$0 ~ patt' file # it prints those lines containing ";" he;llo you; In this case, we pass the pattern ";" with @/;/ and so it prints all the lines that contain ";"

问题 Strongly typed regexp constants is a handy tool that GNU Awk has. It is documented in GNU Awk User's Guide -> 6.1.2.2 Strongly Typed Regexp Constants and in there you can find interesting examples. From reading it, and comments to an answer I made up some examples that show those: $ cat file he;llo ho are you; $ gawk -v patt='@/;/' '$0 ~ patt' file # it prints those lines containing ";" he;llo you; In this case, we pass the pattern ";" with @/;/ and so it prints all the lines that contain ";"

问题 The Beta release of gawk 4.2.0, available in http://www.skeeve.com/gawk/gawk-4.1.65.tar.gz is a major release, with many significant new features . I previously asked about What is the behaviour of FS = " " in GNU Awk 4.2?, and now I noticed the brand new typeof() function to deprecate isarray(): Changes from 4.1.4 to 4.2.0 The new typeof() function can be used to indicate if a variable or array element is an array, regexp, string or number. The isarray() function is deprecated in favor of