improve ls command
This commit is contained in:
parent
4e3e5f2990
commit
3b53b4c96d
3 changed files with 244 additions and 118 deletions
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@ -6,6 +6,7 @@
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#include <stdio.h>
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#include <string.h>
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#include <sys/stat.h>
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#include <sys/ioctl.h>
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#include <unistd.h>
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#include <dirent.h>
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#include <ftw.h>
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@ -26,6 +27,28 @@ struct Flags {
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bool recurse;
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};
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struct FileInfo {
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char mode[11];
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int links;
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struct passwd* usr;
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struct group* grp;
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char size[5];
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char date[13];
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struct dirent* file;
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bool set_uid;
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bool set_gid;
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bool exec;
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};
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struct FileListInfo {
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int max_link;
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int max_usr;
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int max_grp;
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int max_size;
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int max_name;
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int total_len;
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};
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static DIR* get_directory(char* path) {
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DIR* d = opendir(path);
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if (d == NULL) {
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@ -44,114 +67,152 @@ static void append_path(char buf[PATH_MAX], const char* dir_path, const struct d
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memcpy(buf + dir_len, file->d_name, strlen(file->d_name) + 1);
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}
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static void list_file(struct dirent* file, struct Flags* flags, const char* dir_path) {
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static bool get_file_info(struct dirent* file, const char* dir_path, struct FileInfo* info) {
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char* color;
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uid_t uid = getuid();
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gid_t gid = getgid();
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if (file->d_type == DT_DIR) {
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color = DIR_COLOR;
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} else if (file->d_type == DT_LNK) {
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color = LINK_COLOR;
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} else {
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color = FILE_COLOR;
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char buf[PATH_MAX];
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append_path(buf, dir_path, file);
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struct stat s;
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if (stat(buf, &s) < 0) {
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printf("\x1b[0merror: failed to read file '%s': %s\n", buf, strerror(errno));
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return false;
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}
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if (flags->more_info) {
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info->set_uid = false;
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info->set_gid = false;
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info->exec = false;
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uid_t uid = getuid();
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gid_t gid = getgid();
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if (file->d_type == DT_DIR)
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info->mode[0] = 'd';
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else if (file->d_type == DT_LNK)
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info->mode[0] = 'l';
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else
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info->mode[0] = '-';
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char buf[PATH_MAX];
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append_path(buf, dir_path, file);
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struct stat s;
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if (stat(buf, &s) < 0) {
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printf("\x1b[0merror: failed to read file '%s': %s\n", buf, strerror(errno));
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return;
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}
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if (file->d_type == DT_DIR) putchar('d');
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else if (file->d_type == DT_LNK) putchar('l');
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else putchar('-');
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bool group_sticky = false;
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bool user_sticky = false;
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bool exectuable = false;
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putchar((s.st_mode & S_IRUSR) ? 'r' : '-');
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putchar((s.st_mode & S_IWUSR) ? 'w' : '-');
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if (s.st_mode & S_IXUSR) {
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if (putchar(s.st_mode & S_ISUID)) {
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putchar('s');
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user_sticky = true;
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} else {
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putchar('x');
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}
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if (!exectuable) exectuable = s.st_uid == uid;
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info->mode[1] = (s.st_mode & S_IRUSR) ? 'r' : '-';
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info->mode[2] = (s.st_mode & S_IWUSR) ? 'w' : '-';
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if (s.st_mode & S_IXUSR) {
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if (s.st_mode & S_ISUID) {
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info->mode[3] = 's';
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info->set_uid = true;
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} else {
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putchar('-');
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info->mode[3] = 'x';
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}
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putchar((s.st_mode & S_IRGRP) ? 'r' : '-');
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putchar((s.st_mode & S_IWGRP) ? 'w' : '-');
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if (s.st_mode & S_IXGRP) {
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if (putchar(s.st_mode & S_ISGID)) {
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putchar('s');
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group_sticky = true;
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} else {
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putchar('x');
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}
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if (!exectuable) exectuable = s.st_gid == gid;
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} else {
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putchar('-');
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}
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putchar((s.st_mode & S_IROTH) ? 'r' : '-');
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putchar((s.st_mode & S_IWOTH) ? 'w' : '-');
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if (s.st_mode & S_IXOTH) {
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putchar('x');
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exectuable = true;
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} else {
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putchar('-');
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}
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printf(" %ld\t", s.st_nlink);
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struct passwd* passwd = getpwuid(s.st_uid);
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struct group* group = getgrgid(s.st_gid);
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printf("%s ", passwd->pw_name);
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printf("%s ", group->gr_name);
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print_file_size(s.st_size);
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print_date_time(s.st_mtim.tv_sec + s.st_mtim.tv_nsec / 1000000);
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if (file->d_type == DT_REG) {
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if (user_sticky) {
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color = SET_UID_COLOR;
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} else if (group_sticky) {
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color = SET_GID_COLOR;
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} else if (exectuable) {
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color = EXEC_COLOR;
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}
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}
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printf("%s%s\x1b[0m", color, file->d_name);
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if (file->d_type == DT_LNK) {
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char link[PATH_MAX];
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if (readlink(buf, link, PATH_MAX) < 0) {
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printf("\n");
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} else {
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printf(" -> %s\n", link);
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}
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} else {
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printf("\n");
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}
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if (!info->exec) info->exec = s.st_uid == uid;
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} else {
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printf("%s%s", color, file->d_name);
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flags->one_column ? putchar('\n') : putchar(' ');
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info->mode[3] = '-';
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}
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info->mode[4] = (s.st_mode & S_IRGRP) ? 'r' : '-';
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info->mode[5] = (s.st_mode & S_IWGRP) ? 'w' : '-';
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if (s.st_mode & S_IXGRP) {
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if (s.st_mode & S_ISGID) {
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info->mode[6] = 's';
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info->set_gid = true;
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} else {
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info->mode[6] = 'x';
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}
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if (!info->exec) info->exec = s.st_gid == gid;
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} else {
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info->mode[6] = '-';
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}
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info->mode[7] = (s.st_mode & S_IROTH) ? 'r' : '-';
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info->mode[8] = (s.st_mode & S_IWOTH) ? 'w' : '-';
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if (s.st_mode & S_IXOTH) {
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info->mode[9] = 'x';
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info->exec = true;
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} else {
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info->mode[9] = '-';
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}
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info->mode[10] = '\0';
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info->usr = getpwuid(s.st_uid);
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info->grp = getgrgid(s.st_gid);
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info->file = file;
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info->links = s.st_nlink;
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print_file_size(s.st_size, info->size);
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print_date_time(s.st_mtim.tv_sec + s.st_mtim.tv_nsec / 1000000, info->date);
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return true;
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}
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static char* get_file_color(struct FileInfo* info) {
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char* color;
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if (info->file->d_type == DT_DIR) {
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color = DIR_COLOR;
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} else if (info->file->d_type == DT_LNK) {
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color = LINK_COLOR;
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} else {
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if (info->set_uid) {
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color = SET_UID_COLOR;
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} else if (info->set_gid) {
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color = SET_GID_COLOR;
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} else if (info->exec) {
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color = EXEC_COLOR;
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} else {
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color = FILE_COLOR;
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}
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}
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return color;
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}
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static void list_files(struct FileInfo* files, int file_len, struct FileListInfo info, struct Flags* flags, const char* dir_path) {
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struct winsize w;
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ioctl(STDOUT_FILENO, TIOCGWINSZ, &w);
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char* color;
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const int column_width = info.max_name + 1;
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const int row_count = w.ws_col / column_width;
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for (int i = 0; i < file_len; i++) {
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struct FileInfo finfo = files[i];
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if (strlen(finfo.file->d_name) < 1) continue;
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color = get_file_color(&finfo);
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if (flags->more_info) {
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printf("%s %*d %*s %*s %*s %s %s%s\x1b[0m",
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finfo.mode,
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info.max_link,
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finfo.links,
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info.max_usr,
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finfo.usr->pw_name,
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info.max_grp,
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finfo.grp->gr_name,
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info.max_size,
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finfo.size,
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finfo.date,
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color,
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finfo.file->d_name
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);
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if (finfo.file->d_type == DT_LNK) {
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char path[PATH_MAX];
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append_path(path, dir_path, finfo.file);
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char lnk[PATH_MAX];
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if (readlink(path, lnk, PATH_MAX) < 0) {
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putchar('\n');
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} else {
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printf(" -> %s\n", lnk);
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}
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} else {
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putchar('\n');
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}
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} else if (flags->one_column) {
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printf("%s%s\x1b[0m\n", color, finfo.file->d_name);
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} else {
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if (info.total_len > w.ws_col) {
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if (i != 0 && i % row_count == 0) putchar('\n');
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printf("%s%*s\x1b[0m", color, column_width, finfo.file->d_name);
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} else {
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printf("%s%s\x1b[0m ", color, finfo.file->d_name);
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}
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}
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}
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}
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@ -159,6 +220,53 @@ static bool is_dot_dir(const char* path) {
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return streql(path, ".") || streql(path, "..");
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}
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static int num_places (int n) {
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int r = 1;
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if (n < 0) n = (n == INT_MIN) ? INT_MAX: -n;
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while (n > 9) {
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n /= 10;
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r++;
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}
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return r;
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}
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static void push_file(
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struct FileInfo** files,
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struct FileListInfo* info,
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int* size, int* capacity,
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struct dirent* file,
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const char* dir_path
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) {
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struct FileInfo finfo;
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if (!get_file_info(file, dir_path, &finfo)) return;
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if (*size == *capacity) {
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*capacity *= 2;
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*files = realloc(*files, sizeof(struct FileInfo) * *capacity);
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}
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int user_len = strlen(finfo.usr->pw_name);
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if (user_len > info->max_usr) info->max_usr = user_len;
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int group_len = strlen(finfo.grp->gr_name);
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if (group_len > info->max_grp) info->max_grp = group_len;
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int name_len = strlen(file->d_name);
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if (name_len > info->max_name) info->max_name = name_len;
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int size_len = strlen(finfo.size);
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if (size_len > info->max_size) info->max_size = size_len;
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int link_len = num_places(finfo.links);
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if (link_len > info->max_link) info->max_link = link_len;
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info->total_len += name_len + 2;
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(*files)[*size] = finfo;
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(*size)++;
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}
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static void recurse_directory(char* path, struct Flags* flags) {
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DIR* d;
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struct dirent* file;
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@ -167,6 +275,12 @@ static void recurse_directory(char* path, struct Flags* flags) {
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d = get_directory(path);
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if (d == NULL) return;
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int capacity = 8;
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int size = 0;
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struct FileInfo* files = malloc(sizeof(struct FileInfo) * capacity);
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struct FileListInfo info;
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memset(&info, 0, sizeof(struct FileListInfo));
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while((file = readdir(d)) != NULL) {
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if (file->d_type == DT_DIR) continue;
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if (!flags->hidden && prefix(".", file->d_name)) continue;
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@ -175,8 +289,11 @@ static void recurse_directory(char* path, struct Flags* flags) {
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printf("\n%s%s:%s\n", DIR_COLOR, path, FILE_COLOR);
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first = false;
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}
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list_file(file, flags, path);
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push_file(&files, &info, &size, &capacity, file, path);
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}
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list_files(files, size, info, flags, path);
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free(files);
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if (!flags->more_info) printf("\n");
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@ -206,14 +323,22 @@ static void list_directory(char* path, struct Flags* flags) {
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DIR* d = get_directory(path);
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if (d == NULL) return;
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int capacity = 8;
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int size = 0;
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struct FileInfo* files = malloc(sizeof(struct FileInfo) * capacity);
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struct FileListInfo info;
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memset(&info, 0, sizeof(struct FileListInfo));
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struct dirent* file;
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while ((file = readdir(d)) != NULL) {
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if (!flags->hidden && prefix(".", file->d_name)) continue;
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if (flags->hide_dot && is_dot_dir(file->d_name)) continue;
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list_file(file, flags, path);
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push_file(&files, &info, &size, &capacity, file, path);
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}
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list_files(files, size, info, flags, path);
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free(files);
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closedir(d);
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}
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29
src/shared.c
29
src/shared.c
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@ -47,7 +47,7 @@ bool prefix(const char* pre, const char* str) {
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}
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static char fs_types[5] = {'K','M','G','T','P'};
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void print_file_size(size_t bytes) {
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void print_file_size(size_t bytes, char buf[5]) {
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int index = 0;
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float next = bytes;
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while (true) {
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@ -61,25 +61,26 @@ void print_file_size(size_t bytes) {
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next /= 1024;
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index++;
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}
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if (next/100 < 1) putchar(' ');
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if (next/10 < 1) putchar(' ');
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if (index == 0) putchar(' ');
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printf("%u", (int)(next+.5));
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int n = snprintf(buf, 4, "%u", (int)(next+.5));
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if (index > 0) {
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putchar(fs_types[index - 1]);
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buf[n] = (fs_types[index - 1]);
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n++;
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}
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putchar(' ');
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buf[n] = '\0';
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}
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static char* months[12] =
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{"Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"};
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void print_date_time(time_t mills) {
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void print_date_time(time_t mills, char buf[13]) {
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struct tm* info;
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info = localtime(&mills);
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printf("%s ", months[info->tm_mon]);
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if (info->tm_mday < 10)
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printf(" ");
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printf("%d %02d:%02d ", info->tm_mday, info->tm_hour, info->tm_sec);
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int n = snprintf(buf, 5, "%s ", months[info->tm_mon]);
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if (info->tm_mday < 10) {
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buf[n] = ' ';
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n++;
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}
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snprintf(buf + n, 13 - n, "%d %02d:%02d ", info->tm_mday, info->tm_hour, info->tm_sec);
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}
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@ -13,5 +13,5 @@ long int get_number(const char* text);
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bool streql(const char* a, const char* b);
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bool prefix(const char* pre, const char* str);
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void print_file_size(size_t bytes);
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void print_date_time(time_t mills);
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void print_file_size(size_t bytes, char buf[5]);
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void print_date_time(time_t mills, char buf[13]);
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