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New exec_command() that takes command as array instead of string

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This abstracts away the details of argument quoting, which differs
between Unix and Windows.

Also replace all uses of the system() library call with exec_command().
Although system() exists on Windows, it executes the command via cmd.exe,
which has ridiculous escaping rules.
This commit is contained in:
Andrew Ayer
2014-06-10 21:21:38 -07:00
parent 0774ed018c
commit 6e43b2a1cd
5 changed files with 200 additions and 92 deletions
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6
util.hpp
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@@ -36,6 +36,7 @@
#include <iosfwd>
#include <stdint.h>
#include <fstream>
#include <vector>
struct System_error {
std::string action;
@@ -58,8 +59,9 @@ public:
void mkdir_parent (const std::string& path); // Create parent directories of path, __but not path itself__
std::string our_exe_path ();
int exec_command (const char* command, std::ostream& output);
int exec_command_with_input (const char* command, const char* p, size_t len);
int exec_command (const std::vector<std::string>&);
int exec_command (const std::vector<std::string>&, std::ostream& output);
int exec_command_with_input (const std::vector<std::string>&, const char* p, size_t len);
bool successful_exit (int status);
std::string escape_shell_arg (const std::string&);
uint32_t load_be32 (const unsigned char*);