Nahrány soubory do „/“

Makefile

@@ -0,0 +1,23 @@
+CC = gcc
+CFLAGS = -Wall -pedantic -std=c99
+target = rc-file-info
+source = main.c
+release = -O2
+valgrind = -ggdb3
+
+$(target): Makefile $(source)
+#	@echo "sestavuji"
+	$(CC) -o $(target) $(source) $(release) $(CFLAGS)
+
+clean:
+#	@echo "provadim clean"
+	rm -f $(target)
+
+install: $(target)
+	@echo "Instaluji"
+	cp -f $(target) /usr/local/bin
+	sync
+
+valgrind: Makefile $(source)
+	@echo "valgrind"
+	$(CC) -o $(target) $(source) $(valgrind) $(CFLAGS)

main.c

@@ -0,0 +1,154 @@
+#define _POSIX_C_SOURCE 2
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+#include <time.h>
+#include <sys/stat.h>
+#include <pwd.h>
+#include <linux/limits.h>
+
+#define RC_OK 0
+#define RC_ERROR -1
+
+static const char* _err_invalid_arg = "nebyl zadán platný soubor";
+
+static int get_command_output_line(const char* cmd,
+	char* outbuff, size_t bufsize)
+{
+	FILE* pf = popen(cmd, "r");
+	if (NULL == pf) {
+		return RC_ERROR;
+	}
+	int retval = RC_OK;
+	if (!feof(pf)) {
+		if (NULL == fgets(outbuff, bufsize, pf)) {
+			*outbuff = 0;
+			retval = RC_ERROR;
+		}
+	}
+	else
+		retval = RC_ERROR;
+	pclose(pf);
+	char* pnl = strrchr(outbuff, '\n');
+	if (pnl)
+		*pnl = 0;
+	return retval;
+}
+
+static int get_mime_type(const char* file_path,
+	char* outbuff, size_t buffsize)
+{
+	char* cmdbuff = (char*)malloc(strlen(file_path) + 64);
+	if (NULL == cmdbuff)
+		abort();
+	strcpy(cmdbuff, "xdg-mime query filetype \"");
+	strcat(cmdbuff, file_path);
+	strcat(cmdbuff, "\"");
+	if (RC_OK != get_command_output_line(cmdbuff, outbuff, buffsize)) {
+		free(cmdbuff);
+		return RC_ERROR;
+	}
+	free(cmdbuff);
+	return RC_OK;
+}
+
+static int get_app_name(const char* desktop_file,
+	char* outbuff, size_t buffsize)
+{
+	char filepath[PATH_MAX];
+	strcpy(filepath, "/usr/share/applications/");
+	strncat(filepath, desktop_file, sizeof(filepath) - strlen(filepath) - 1);
+	FILE* pf = fopen(filepath, "r");
+	if (NULL == pf)
+		return RC_ERROR;
+	char line[512];
+	*outbuff = 0;
+	while (fgets(line, sizeof(line), pf)) {
+		if (sscanf(line, "Name=%s", outbuff) == 1)
+			break;
+	}
+	fclose(pf);
+	return (0 == *outbuff) ? RC_ERROR : RC_OK;
+}
+
+static int get_mime_opener(const char* mimetype,
+	char* outbuff, size_t buffsize)
+{
+	char cmdbuff[256];
+	strcpy(cmdbuff, "xdg-mime query default ");
+	strncat(cmdbuff, mimetype, sizeof(cmdbuff) - strlen(cmdbuff) - 1);
+	return get_command_output_line(cmdbuff, outbuff, buffsize);
+}
+
+static int show_file_info(const char* file_path)
+{
+	struct stat fst;
+	char buff[256];
+	struct passwd* pwd;
+	if (0 != stat(file_path, &fst)) {
+		return errno;
+	}
+	printf("velikost: %lu MiB (%lu bytů)\n",
+		fst.st_size / 1024 / 1024, fst.st_size);
+	printf("na disku: %lu MiB (%lu bytů)\n",
+		(fst.st_blocks * 512) / 1024 / 1024, fst.st_blocks * 512);
+	printf("pevných odkazů: %lu\n", fst.st_nlink);
+	strftime(buff, sizeof(buff), "poslední přístup: %d.%m.%Y %H:%M:%S",
+		localtime((const time_t*)&fst.st_atime));
+	puts(buff);
+	strftime(buff, sizeof(buff), " poslední úprava: %d.%m.%Y %H:%M:%S",
+		localtime((const time_t*)&fst.st_mtime));
+	puts(buff);
+	strftime(buff, sizeof(buff), "     změna stavu: %d.%m.%Y %H:%M:%S",
+		localtime((const time_t*)&fst.st_ctime));
+	puts(buff);
+	char permission[4];
+	unsigned int uperm;
+	uperm = 100 * (0x7 & (fst.st_mode >> 6)) +
+		10 * (0x7 & (fst.st_mode >> 3)) +
+		(0x7 & fst.st_mode);
+	permission[3] = 0;
+	permission[0] = (S_IRUSR & fst.st_mode) ? 'r' : '-';
+	permission[1] = (S_IWUSR & fst.st_mode) ? 'w' : '-';
+	permission[2] = (S_IXUSR & fst.st_mode) ? 'x' : '-';
+	if ((pwd = getpwuid(fst.st_uid)) != NULL) {
+		printf("vlastník: %s (%d)\n", pwd->pw_name, pwd->pw_uid);
+	}
+	else {
+		printf("User ID: %u\n", fst.st_uid);
+	}
+	printf("oprávnění: %u\n", uperm);
+	printf("uživatel: %s", permission);
+	permission[0] = (S_IRGRP & fst.st_mode) ? 'r' : '-';
+	permission[1] = (S_IWGRP & fst.st_mode) ? 'w' : '-';
+	permission[2] = (S_IXGRP & fst.st_mode) ? 'x' : '-';
+	printf("  skupina: %s", permission);
+	permission[0] = (S_IROTH & fst.st_mode) ? 'r' : '-';
+	permission[1] = (S_IWOTH & fst.st_mode) ? 'w' : '-';
+	permission[2] = (S_IXOTH & fst.st_mode) ? 'x' : '-';
+	printf("  ostatní: %s\n", permission);
+	if (RC_OK == get_mime_type(file_path, buff, sizeof(buff))) {
+		printf("mime typ: %s\n", buff);
+		if (RC_OK == get_mime_opener(buff, buff, sizeof(buff))) {
+			printf("výchozí aplikace: %s", buff);
+			if (RC_OK == get_app_name(buff, buff, sizeof(buff))) {
+				printf(" (%s)", buff);
+			}
+			printf("\n");
+		}
+	}
+	printf("\nstiskni enter pro ukončení...");
+	getchar();
+	return EXIT_SUCCESS;
+}
+
+int main(int argc, char** argv)
+{
+	if (argc < 2) {
+		puts(_err_invalid_arg);
+		return EXIT_FAILURE;
+	}
+	return show_file_info(argv[1]);
+}