If you don't do that, you can end up in a normal iterative shell (rather than this one-shot, non-iterative, non-interactive shell) with multiple shell processes all trying to read from the terminal at the same time, which leads to chaos and confusion. This option is ignored if the filecodeset or pgmcodeset options (-W option) are specified. If grep decides the file is a text file, it strips the CR characters from the original file contents (to make regular expressions with and work correctly). grep accepts all the following options while egrep and fgrep accept all but the -E and -F options.-A num Displays num lines of trailing context after the lines are matched.-B Disables the automatic conversion of tagged files. It is crucial that you report the error and that the child process then exits. By default, under MS-DOS and MS-Windows, grep guesses whether a file is text or binary as described for the -binary-files option. It can happen when the user mistypes a command name, for example. If any of the exec*() functions returns, it failed. You should report failures after execvp(). This looks for a dot and a c at the end of the line. You are looking for files whose name contains ".c" (where the double quotes are part of the file name being searched for). Put together, the complete command line is: git grep -+. If you need to match the regexp only at the end of line then put (the end of line anchor) as the last character of the regexp. When you use dup2() to replicate a file descriptor from a pipe to standard input or standard output, you should close both file descriptors returned by pipe().Ī second problem is that the shell removes double quotes around arguments but you've added them around your. The grepping tools, by default, try to match the regexp against one row at a time and git grep does the same. One problem is that you have far too few calls to close().
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