shell-scape: Échappe des caractères spéciaux

shell-escape/Makefile

@@ -0,0 +1,25 @@
+CC := gcc
+CFLAGS := -Wall -Wextra
+CPPFLAGS := -isystemthird-party
+
+all: test
+
+test: testEscape
+	./testEscape
+
+testEscape: build/escape.o build/testEscape.o ../static-string-builder/build/builder.o
+	$(CC) -o $@ $^
+
+build/escape.o: src/escape.c src/escape.h | build
+	$(CC) $(CPPFLAGS) $(CFLAGS) -c $< -o $@
+
+build/testEscape.o: test/testEscape.c src/escape.h | build
+	$(CC) $(CPPFLAGS) $(CFLAGS) -Isrc/ -c $< -o $@
+
+build:
+	mkdir build
+
+clean:
+	rm -rf testEscape build
+
+.PHONY: all test clean

shell-escape/oki.toml

@@ -0,0 +1,8 @@
+[package]
+name = "shell-escape"
+version = "0.1.0"
+description = "Escape shell characters"
+license = "MIT"
+
+[dependencies]
+static-string-builder = "^0.1"

shell-escape/src/escape.c

@@ -0,0 +1,45 @@
+#include "escape.h"
+
+#include <static-string-builder/builder.h>
+
+#include <ctype.h>
+#include <stdbool.h>
+#include <string.h>
+
+bool isShellSafe(char ch) {
+    return strchr("@%+=:,./-_", ch) != NULL || isalnum(ch);
+}
+
+bool isSafeShellStr(const char *str) {
+    for (; *str; str++) {
+        if (!isShellSafe(*str)) {
+            return false;
+        }
+    }
+    return true;
+}
+
+const char *shellEscape(const char *str) {
+    if (isSafeShellStr(str)) {
+        return str;
+    }
+
+    char *result = tmp_end();
+
+    tmp_append_char('\'');
+    while (str) {
+        char *end = strchr(str, '\'');
+        if (end) {
+            tmp_append_sized(str, end - str);
+            tmp_append_cstr("'\"'\"'");
+            str = end + 1;
+        } else {
+            tmp_append_cstr(str);
+            str = NULL;
+        }
+    }
+    tmp_append_char('\'');
+    tmp_append_char('\0');
+
+    return result;
+}

shell-escape/src/escape.h

@@ -0,0 +1,6 @@
+#ifndef SHELL_ESCAPE_H
+#define SHELL_ESCAPE_H
+
+const char *shellEscape(const char *str);
+
+#endif // SHELL_ESCAPE_H

shell-escape/test/testEscape.c

@@ -0,0 +1,15 @@
+#include "escape.h"
+
+#include <assert.h>
+#include <stdio.h>
+#include <string.h>
+
+int main(void) {
+	assert(strcmp("aa", shellEscape("aa")) == 0);
+	assert(strcmp("'aa bb'", shellEscape("aa bb")) == 0);
+	assert(strcmp("'a(b)'", shellEscape("a(b)")) == 0);
+	assert(strcmp("'aa && bb'", shellEscape("aa && bb")) == 0);
+	assert(strcmp("'echo aa '\"'\"'s'\"'\"''", shellEscape("echo aa 's'")) == 0);
+	return 0;
+}
+

shell-escape/third-party/static-string-builder

@@ -0,0 +1 @@
+../../static-string-builder/src/

static-string-builder/src/builder.h

@@ -22,6 +22,8 @@ char *tmp_end(void);
  */
 char *tmp_append_char(char c);
 
+char *tmp_append_sized(const char *buffer, size_t buffer_sz);
+
 char *tmp_append_cstr(const char *cstr);
 
 void tmp_clean();