permission parsing
Stefan Schuermans commited on 2020-08-18 20:17:46
Showing 2 changed files, with 77 additions and 3 deletions.
- permissionerd/src/Permissions.cpp 4793a06..3c54940
- permissionerd/src/Permissions.h e4903dd..e8f269f
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@@ -3,7 +3,68 @@ |
| 3 | 3 |
#include <string> |
| 4 | 4 |
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void Permissions::parseParams(std::string const ¶mStr) {
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- for (char c : paramStr) {
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- (void)c; |
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+ // reset permission flags |
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+ set = 0; |
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+ setCond = 0; |
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+ clear = 0; |
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+ clearCond = 0; |
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+ // parse comma-separated groups of [ugoa][+-][rwxX] settings |
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+ Flags who = 0, what = 0, whatCond = 0; |
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+ char action = ' '; |
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+ // append comma at end to process last group |
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+ for (char c : paramStr + ",") {
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+ switch (c) {
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+ case ',': |
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+ switch (action) {
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+ case '=': |
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+ set = who * what; |
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+ setCond = who * whatCond; |
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+ clear = who * (what ^ (flagRead | flagWrite | flagExecute)); |
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+ clearCond = who * (what ^ flagExecute); |
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+ break; |
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+ case '+': |
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+ set = who * what; |
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+ setCond = who * whatCond; |
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+ break; |
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+ case '-': |
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+ clear = who * what; |
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+ clearCond = who * whatCond; |
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+ break; |
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+ } |
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+ who = 0; |
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+ what = 0; |
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+ whatCond = 0; |
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+ action = ' '; |
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+ break; |
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+ case 'u': |
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+ who |= flagUser; |
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+ break; |
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+ case 'g': |
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+ who |= flagGroup; |
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+ break; |
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+ case 'o': |
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+ who |= flagOther; |
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+ break; |
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+ case 'a': |
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+ who |= flagUser | flagGroup | flagOther; |
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+ break; |
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+ case '=': |
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+ case '+': |
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+ case '-': |
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+ action = c; |
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+ break; |
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+ case 'r': |
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+ what |= flagRead; |
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+ break; |
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+ case 'w': |
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+ what |= flagWrite; |
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+ break; |
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+ case 'x': |
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+ what |= flagExecute; |
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+ break; |
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+ case 'X': |
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+ whatCond |= flagExecute; |
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+ break; |
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+ } |
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| 8 | 69 |
} |
| 9 | 70 |
} |
| ... | ... |
@@ -1,11 +1,21 @@ |
| 1 | 1 |
#ifndef PERMISSIONS_H |
| 2 | 2 |
#define PERMISSIONS_H |
| 3 | 3 |
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+#include <cstdint> |
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#include <string> |
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/// permissions configuration |
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class Permissions {
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public: |
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+ typedef uint64_t Flags; |
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+ |
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+ static const Flags flagRead = 01; |
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+ static const Flags flagWrite = 02; |
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+ static const Flags flagExecute = 04; |
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+ static const Flags flagOther = 01; |
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+ static const Flags flagGroup = 010; |
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+ static const Flags flagUser = 0100; |
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+ |
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/** |
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* @brief parse permissions parameters |
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* @param[in] parmStr parameter string |
| ... | ... |
@@ -14,7 +24,10 @@ public: |
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void parseParams(std::string const ¶mStr); |
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|
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protected: |
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- |
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+ Flags set = 0; ///< permissions to set |
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+ Flags setCond = 0; ///< permissions to set conditionally on usrexec/dir |
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+ Flags clear = 0; ///< permissions to clear |
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+ Flags clearCond = 0; ///< permissions to clear conditionally on usrexec/dir |
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}; |
| 19 | 32 |
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#endif // #ifndef PERMISSIONS_H |
| 21 | 34 |