谢谢所有的好主意!

我尝试了xargs方法，但正如这里所指出的，xargs将使它不可能(或非常困难)包括打印实际的文件名……

所以我尝试了GNU并行。

parallel "pdftotext -q {} - | grep --with-filename --label='['{}']' --color=always --context=5 'pattern'" ::: *.pdf

This prints not only the pattern, but with --context=5 also 5 lines above and below as well for context. With -q pdftotext won't print any error messages or warnings (quiet). I use brackets [] as labels instead of braces {}. If you wanted braces --label='{'{}'}' will make that happen. Note that {} is replaced by the actual filename by GNU parallel, e.g. 'Example portable document file name with spaces.pdf' ({} is already using single quotes '). By using --label={} only the filename will be printed, which may be the favored way of displaying the filename. I also noticed that the output was without color when I tried it, except when forcing it by adding --color=always with grep. It may be useful to add --ignore-case to the grep command for a case-insensitive keyword search.

如果所有PDF文件都应该递归处理，包括当前目录(.)中的所有子目录，这可以通过find来完成:

find . -type f -iname '*.pdf' -print0 | parallel -0 "pdftotext -q {} - | grep --with-filename --label='['{}']' --color=always --context=5 'pattern'"

With find, -iname '*.pdf' acts case-insensitive. With -name '*.pdf' only lower-case .pdf files will be included (the normal case). Since I sometimes also encountered Windows PDF-files with an upper-case .PDF file extension, I tend to prefer -iname... The above command also works with the -print find option (instead of -print0), so it will be line-based (one file name per line), then -0 (NUL delimiter) must be omitted from the parallel command. Again, including --ignore-case in the grep command will make the search case-insensitive.

作为处理整个命令行的一般建议，parallel -dry-run将打印将要执行的命令。

$ find . -type f -iname '*.pdf' -print0 | parallel --dry-run -0 "pdftotext -q {} - | grep --with-filename --label='['{}']' --color=always --ignore-case --context=5 'pattern'"
pdftotext -q ./test PDF file 1.pdf - | grep --with-filename --label='['./test PDF file 1.pdf']' --color=always --ignore-case --context=5 'pattern'
pdftotext -q ./subdir1/test PDF file 2.pdf - | grep --with-filename --label='['./subdir1/test PDF file 2.pdf']' --color=always --ignore-case --context=5 'pattern'
pdftotext -q ./subdir2/test PDF file 3.pdf - | grep --with-filename --label='['./subdir2/test PDF file 3.pdf']' --color=always --ignore-case --context=5 'pattern'

还有pdfgrep，它做的正是它的名字所暗示的。

pdfgrep -R 'a pattern to search recursively from path' /some/path

我用它做过简单的搜索，效果很好。

(Debian、Ubuntu和Fedora中都有软件包。)

从1.3.0版本开始，pdfgrep支持递归搜索。这个版本从Ubuntu 12.10 (Quantal)开始在Ubuntu中可用。

谢谢所有的好主意!

我尝试了xargs方法，但正如这里所指出的，xargs将使它不可能(或非常困难)包括打印实际的文件名……

所以我尝试了GNU并行。

parallel "pdftotext -q {} - | grep --with-filename --label='['{}']' --color=always --context=5 'pattern'" ::: *.pdf

This prints not only the pattern, but with --context=5 also 5 lines above and below as well for context. With -q pdftotext won't print any error messages or warnings (quiet). I use brackets [] as labels instead of braces {}. If you wanted braces --label='{'{}'}' will make that happen. Note that {} is replaced by the actual filename by GNU parallel, e.g. 'Example portable document file name with spaces.pdf' ({} is already using single quotes '). By using --label={} only the filename will be printed, which may be the favored way of displaying the filename. I also noticed that the output was without color when I tried it, except when forcing it by adding --color=always with grep. It may be useful to add --ignore-case to the grep command for a case-insensitive keyword search.

如果所有PDF文件都应该递归处理，包括当前目录(.)中的所有子目录，这可以通过find来完成:

find . -type f -iname '*.pdf' -print0 | parallel -0 "pdftotext -q {} - | grep --with-filename --label='['{}']' --color=always --context=5 'pattern'"

With find, -iname '*.pdf' acts case-insensitive. With -name '*.pdf' only lower-case .pdf files will be included (the normal case). Since I sometimes also encountered Windows PDF-files with an upper-case .PDF file extension, I tend to prefer -iname... The above command also works with the -print find option (instead of -print0), so it will be line-based (one file name per line), then -0 (NUL delimiter) must be omitted from the parallel command. Again, including --ignore-case in the grep command will make the search case-insensitive.

作为处理整个命令行的一般建议，parallel -dry-run将打印将要执行的命令。

$ find . -type f -iname '*.pdf' -print0 | parallel --dry-run -0 "pdftotext -q {} - | grep --with-filename --label='['{}']' --color=always --ignore-case --context=5 'pattern'"
pdftotext -q ./test PDF file 1.pdf - | grep --with-filename --label='['./test PDF file 1.pdf']' --color=always --ignore-case --context=5 'pattern'
pdftotext -q ./subdir1/test PDF file 2.pdf - | grep --with-filename --label='['./subdir1/test PDF file 2.pdf']' --color=always --ignore-case --context=5 'pattern'
pdftotext -q ./subdir2/test PDF file 3.pdf - | grep --with-filename --label='['./subdir2/test PDF file 3.pdf']' --color=always --ignore-case --context=5 'pattern'

我写了这个破坏性的小脚本。祝你玩得开心。

function pdfsearch()
{
    find . -iname '*.pdf' | while read filename
    do
        #echo -e "\033[34;1m// === PDF Document:\033[33;1m $filename\033[0m"
        pdftotext -q -enc ASCII7 "$filename" "$filename."; grep -s -H --color=always -i $1 "$filename."
        # remove it!  rm -f "$filename."
    done
}

我喜欢@sjr的答案，但我更喜欢xargs vs -exec。我发现xargs更通用。例如，使用-P，我们可以在必要时利用多个cpu。

find . -name '*.pdf' | xargs -P 5 -I % pdftotext % - | grep --with-filename --label="{}" --color "pattern"

我也遇到了同样的问题，因此我写了一个脚本，搜索指定文件夹中的所有pdf文件的字符串，并打印匹配查询字符串的pdf文件。

也许这对你有帮助。

你可以在这里下载