main() / ls5.4 / MINIX 3

概要 †

引数 †

実装 †

int main(int argc, char **argv)
{
        struct file *flist= nil, **aflist= &flist;

• file/ls5.4/MINIX 3を参照。

        enum depth depth;

• /usr/src/commands/simple/ls.cで定義。
• enum depth { SURFACE, SURFACE1, SUBMERGED };

        char *lsflags;
        struct winsize ws;

• winsize/ls5.4/MINIX 3を参照

        uid= geteuid();
        gid= getegid();

• uid,gidはint。グローバル変数。
• 実効ユーザIDと実効グループIDを取得。

        if ((arg0= strrchr(argv[0], '/')) == nil) arg0= argv[0]; else arg0++;
        argv++;

        if (strcmp(arg0, "ls") != 0) {
                char *p= arg0+1;

                while (*p != 0) {
                        if (strchr(arg0flag, *p) != nil) *p += 'A' - 'a';
                        p++;
                }
                setflags(arg0+1);
        }
        while (*argv != nil && (*argv)[0] == '-') {
                if ((*argv)[1] == '-' && (*argv)[2] == 0) {
                        argv++;
                        break;
                }
                setflags(*argv++ + 1);
        }

        istty= isatty(1);

        if (istty && (lsflags= getenv("LSOPTS")) != nil) {
                if (*lsflags == '-') lsflags++;
                setflags(lsflags);
        }

        if (!present('1') && !present('C') && !present('l')
                && (istty || present('M') || present('X') || present('F'))
        ) setflags("C");

        if (istty) setflags("q");

        if (SUPER_ID == 0 || present('a')) setflags("A");

        if (present('i')) field|= L_INODE;
        if (present('s')) field|= L_BLOCKS;
        if (present('M')) field|= L_MODE;
        if (present('X')) field|= L_EXTRA | L_MODE;
        if (present('t')) field|= L_BYTIME;
        if (present('u')) field|= L_ATIME;
        if (present('c')) field|= L_CTIME;
        if (present('l')) field|= L_MODE | L_LONG;
        if (present('g')) field|= L_MODE | L_LONG | L_GROUP;
        if (present('F')) field|= L_MARK;
        if (present('p')) field|= L_MARKDIR;
        if (present('D')) field|= L_TYPE;
        if (present('T')) field|= L_MODE | L_LONG | L_LONGTIME;
        if (present('d')) field|= L_DIR;
        if (present('h')) field|= L_KMG;
        if (field & L_LONG) field&= >L_EXTRA;

#ifdef S_IFLNK
        status= present('L') ? stat : lstat;
#endif

        if (present('C')) {
                int t= istty ? 1 : open("/dev/tty", O_WRONLY);

                if (t >= 0 && ioctl(t, TIOCGWINSZ, &ws) == 0 && ws.ws_col > 0)
                        ncols= ws.ws_col - 1;

                if (t != 1 && t != -1) close(t);
        }

        depth= SURFACE;

        if (*argv == nil) {
                if (!(field & L_DIR)) depth= SURFACE1;
                pushfile(aflist, newfile("."));
        } else {
                if (argv[1] == nil && !(field & L_DIR)) depth= SURFACE1;

                do {
                        pushfile(aflist, newfile(*argv++));
                        aflist= &(*aflist)->next;
                } while (*argv!=nil);
        }
        listfiles(flist, depth,
                (field & L_DIR) ? BOTTOM : present('R') ? FLOATING : SINKING);
        return ex;
}

呼出元 †

履歴 †