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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, "<1fiRr[-fi]", TOYFLAG_BIN))
config RM
bool "rm"
default y
help
usage: rm [-fiRr] 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
*/
#define FOR_rm
#include "toys.h"
static int do_rm(struct dirtree *try)
{
int fd = dirtree_parentfd(try), flags = toys.optflags;
int or = 0, using = 0;
// Skip . and .. (yes, even explicitly on the command line: posix says to)
if (!dirtree_notdotdot(try)) return 0;
if (S_ISDIR(try->st.st_mode)) {
if (flags & (FLAG_r|FLAG_R)) {
if (try->data != -1) return DIRTREE_COMEAGAIN;
using = AT_REMOVEDIR;
}
}
// Prompt if necessary
if (!(flags & FLAG_f) && faccessat(fd, try->name, W_OK, AT_SYMLINK_NOFOLLOW))
or++;
if ((or && isatty(0)) || (flags & FLAG_i)) {
fprintf(stderr, "rm %s", or ? "ro " : "");
if (!yesno(try->name, 2)) return 0;
}
// Intentionally fail non-recursive attempts to remove even an empty dir
// because POSIX says to.
if (unlinkat(fd, try->name, using)) {
perror_msg("%s", try->name);
toys.exitval = 1;
}
return 0;
}
void rm_main(void)
{
char **s;
for (s = toys.optargs; *s; s++) {
if (!strcmp(*s, "/")) {
error_msg("rm /. if you mean it");
toys.exitval = 1;
continue;
}
// There's a race here where a file removed between this access 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.
if ((toys.optflags & FLAG_f) && (access(*s, F_OK) && errno == ENOENT))
continue;
dirtree_read(*s, do_rm);
}
}
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