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Chapter 5 - Pointers and Arrays
http://kor.i2p/books/The%20C%20Programming%20Language%20by%20K&R/chapter5.html
As a second example, let us make some enhancements to the pattern-finding program from Section 4.1 . If you recall, we wired the search pattern deep into the program, an obviously unsatisfactory arrangement. Following the lead of the UNIX program grep , let us enhance the program so the pattern to be matched is specified by the first argument on the command line.
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. +# +############################################################################## + +# Attempt to set APP_HOME + +# Resolve links: $0 may be a link +app_path=$0 + +# Need this for daisy-chained symlinks. +while + APP_HOME=${app_path%"${app_path##*/}"} # leaves a trailing /; empty if no leading path + [ -h "$app_path" ] +do + ls=$( ls -ld "$app_path" ) + link=${ls#*' -> '} + case $link in #( + /*) app_path=$link ;; #( + *) ...
Стражи Чёрной Скалы (fb2) | Флибуста
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