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- /* 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), 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 && !(toys.optflags & (FLAG_r|FLAG_R))) goto skip;
- // This is either the posix section 2(b) prompt or the section 3 prompt.
- if (!FLAG(f)
- && (!S_ISLNK(try->st.st_mode) && faccessat(fd, try->name, W_OK, 0))) or++;
- // Posix section 1(a), don't prompt for nonexistent.
- if (or && errno == ENOENT) goto skip;
- if (!(dir && try->again) && ((or && isatty(0)) || 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 (FLAG(f)) wfchmodat(fd, try->name, 0700);
- else goto skip;
- }
- if (!try->again) return DIRTREE_COMEAGAIN;
- if (try->symlink) goto skip;
- if (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 (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 && !FLAG(f)) help_exit("Needs 1 argument");
- for (s = toys.optargs; *s; s++) {
- if (!strcmp(*s, "/")) {
- error_msg("rm /. if you mean it");
- continue;
- }
- // "rm dir/.*" can expand to include .. which generally isn't what you want
- if (!strcmp("..", basename(*s))) {
- error_msg("bad path %s", *s);
- continue;
- }
- // Files that already don't exist aren't errors for -f. Use lstat() instead
- // of faccessat() because bionic doesn't support AT_SYMLINK_NOFOLLOW
- if (FLAG(f) && lstat(*s, (void *)toybuf) && 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);
- }
- }
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