/* rm.c - remove files * * Copyright 2012 Rob Landley <rob@landley.net> * * See http://pubs.opengroup.org/onlinepubs/9699919799/utilities/rm.html USE_RM(NEWTOY(rm, "fiRrv[-fi]", TOYFLAG_BIN)) config RM bool "rm" default y help usage: rm [-fiRrv] FILE... Remove each argument from the filesystem. -f Force: remove without confirmation, no error if it doesn't exist -i Interactive: prompt for confirmation -rR Recursive: remove directory contents -v Verbose */ #define FOR_rm #include "toys.h" static int do_rm(struct dirtree *try) { int fd = dirtree_parentfd(try), flags = toys.optflags; int dir = S_ISDIR(try->st.st_mode), or = 0, using = 0; // Skip . and .. (yes, even explicitly on the command line: posix says to) if (isdotdot(try->name)) return 0; // Intentionally fail non-recursive attempts to remove even an empty dir // (via wrong flags to unlinkat) because POSIX says to. if (dir && !(flags & (FLAG_r|FLAG_R))) goto skip; // This is either the posix section 2(b) prompt or the section 3 prompt. if (!(flags & FLAG_f) && (!S_ISLNK(try->st.st_mode) && faccessat(fd, try->name, W_OK, 0))) or++; if (!(dir && try->again) && ((or && isatty(0)) || (flags & FLAG_i))) { char *s = dirtree_path(try, 0); fprintf(stderr, "rm %s%s%s", or ? "ro " : "", dir ? "dir " : "", s); free(s); or = yesno(0); if (!or) goto nodelete; } // handle directory recursion if (dir) { using = AT_REMOVEDIR; // Handle chmod 000 directories when -f if (faccessat(fd, try->name, R_OK, 0)) { if (toys.optflags & FLAG_f) wfchmodat(fd, try->name, 0700); else goto skip; } if (!try->again) return DIRTREE_COMEAGAIN; if (try->symlink) goto skip; if (flags & FLAG_i) { char *s = dirtree_path(try, 0); // This is the section 2(d) prompt. (Yes, posix says to prompt twice.) fprintf(stderr, "rmdir %s", s); free(s); or = yesno(0); if (!or) goto nodelete; } } skip: if (!unlinkat(fd, try->name, using)) { if (flags & FLAG_v) { char *s = dirtree_path(try, 0); printf("%s%s '%s'\n", toys.which->name, dir ? "dir" : "", s); free(s); } } else { if (!dir || try->symlink != (char *)2) perror_msg_raw(try->name); nodelete: if (try->parent) try->parent->symlink = (char *)2; } return 0; } void rm_main(void) { char **s; // Can't use <1 in optstring because zero arguments with -f isn't an error if (!toys.optc && !(toys.optflags & FLAG_f)) error_exit("Needs 1 argument"); for (s = toys.optargs; *s; s++) { if (!strcmp(*s, "/")) { error_msg("rm /. if you mean it"); continue; } // Files that already don't exist aren't errors for -f, so try a quick // unlink now to see if it succeeds or reports that it didn't exist. if ((toys.optflags & FLAG_f) && (!unlink(*s) || errno == ENOENT)) continue; // There's a race here where a file removed between the above check and // dirtree's stat would report the nonexistence as an error, but that's // not a normal "it didn't exist" so I'm ok with it. dirtree_read(*s, do_rm); } }