Ensure all read utilities yield constant string pointers for safety.
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@ -43,7 +43,7 @@ const char *mpw_getenv(const char *variableName) {
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return envBuf? mpw_strdup( envBuf ): NULL;
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}
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char *mpw_askpass(const char *prompt) {
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const char *mpw_askpass(const char *prompt) {
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const char *askpass = mpw_getenv( MP_ENV_askpass );
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if (!askpass)
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@ -74,7 +74,7 @@ char *mpw_askpass(const char *prompt) {
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}
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close( pipes[1] );
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char *answer = mpw_read_fd( pipes[0] );
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const char *answer = mpw_read_fd( pipes[0] );
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close( pipes[0] );
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int status;
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if (waitpid( pid, &status, 0 ) == ERR) {
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@ -86,7 +86,7 @@ char *mpw_askpass(const char *prompt) {
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if (WIFEXITED( status ) && WEXITSTATUS( status ) == EXIT_SUCCESS && answer && strlen( answer )) {
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// Remove trailing newline.
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if (answer[strlen( answer ) - 1] == '\n')
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answer[strlen( answer ) - 1] = '\0';
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mpw_replace_string( answer, mpw_strndup( answer, strlen( answer ) - 1 ) );
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return answer;
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}
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@ -97,7 +97,7 @@ char *mpw_askpass(const char *prompt) {
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static const char *_mpw_getline(const char *prompt, bool silent) {
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// Get answer from askpass.
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char *answer = mpw_askpass( prompt );
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const char *answer = mpw_askpass( prompt );
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if (answer)
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return answer;
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@ -250,7 +250,7 @@ bool mpw_mkdirs(const char *filePath) {
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return success;
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}
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char *mpw_read_fd(int fd) {
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const char *mpw_read_fd(int fd) {
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char *buf = NULL;
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size_t blockSize = 4096, bufSize = 0, bufOffset = 0;
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@ -263,7 +263,7 @@ char *mpw_read_fd(int fd) {
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return buf;
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}
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char *mpw_read_file(FILE *file) {
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const char *mpw_read_file(FILE *file) {
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if (!file)
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return NULL;
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@ -36,7 +36,7 @@ const char *mpw_getenv(const char *variableName);
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/** Use the askpass program to prompt the user.
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* @return A newly allocated string or NULL if askpass is not supported or an error occurred. */
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char *mpw_askpass(const char *prompt);
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const char *mpw_askpass(const char *prompt);
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/** Ask the user a question.
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* @return A newly allocated string or NULL if an error occurred trying to read from the user. */
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@ -58,11 +58,11 @@ bool mpw_mkdirs(const char *filePath);
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/** Read until EOF from the given file descriptor.
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* @return A newly allocated string or NULL the read buffer couldn't be allocated. */
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char *mpw_read_fd(int fd);
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const char *mpw_read_fd(int fd);
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/** Read the file contents of a given file.
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* @return A newly allocated string or NULL the read buffer couldn't be allocated. */
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char *mpw_read_file(FILE *file);
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const char *mpw_read_file(FILE *file);
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/** Encode a visual fingerprint for a user.
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* @return A newly allocated string. */
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@ -476,8 +476,8 @@ void cli_user(Arguments *args, Operation *operation) {
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else {
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// Read file.
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char *sitesInputData = mpw_read_file( sitesFile );
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if (ferror( sitesFile ))
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const char *sitesInputData = mpw_read_file( sitesFile );
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if (!sitesInputData || ferror( sitesFile ))
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wrn( "Error while reading configuration file:\n %s: %d", operation->sitesPath, ferror( sitesFile ) );
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fclose( sitesFile );
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@ -144,6 +144,10 @@ bool __mpw_free_string(
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({ __typeof__(strings) _s = strings; const char *__s = *_s; (void)__s; __mpw_free_strings( (char **)_s, __VA_ARGS__ ); })
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bool __mpw_free_strings(
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char **strings, ...);
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/** Free a string after zero'ing its contents, then set the reference to the replacement string.
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* The replacement string is generated before the original is freed; it may be a derivative of the original. */
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#define mpw_replace_string(string, replacement) \
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do { const char *replacement_ = replacement; mpw_free_string( &string ); string = replacement_; } while (0)
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#ifdef _MSC_VER
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#undef mpw_realloc
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#define mpw_realloc(buffer, bufferSize, deltaSize) \
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