rm.c revision 241014
11556Srgrimes/*- 21556Srgrimes * Copyright (c) 1990, 1993, 1994 31556Srgrimes * The Regents of the University of California. All rights reserved. 41556Srgrimes * 51556Srgrimes * Redistribution and use in source and binary forms, with or without 61556Srgrimes * modification, are permitted provided that the following conditions 71556Srgrimes * are met: 81556Srgrimes * 1. Redistributions of source code must retain the above copyright 91556Srgrimes * notice, this list of conditions and the following disclaimer. 101556Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 111556Srgrimes * notice, this list of conditions and the following disclaimer in the 121556Srgrimes * documentation and/or other materials provided with the distribution. 131556Srgrimes * 4. Neither the name of the University nor the names of its contributors 141556Srgrimes * may be used to endorse or promote products derived from this software 151556Srgrimes * without specific prior written permission. 161556Srgrimes * 171556Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 181556Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 191556Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 201556Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 211556Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 221556Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 231556Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 241556Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 251556Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 261556Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 271556Srgrimes * SUCH DAMAGE. 281556Srgrimes */ 291556Srgrimes 30114433Sobrien#if 0 311556Srgrimes#ifndef lint 3227959Sstevestatic const char copyright[] = 331556Srgrimes"@(#) Copyright (c) 1990, 1993, 1994\n\ 341556Srgrimes The Regents of the University of California. All rights reserved.\n"; 3527964Ssteve#endif /* not lint */ 3627964Ssteve 3727964Ssteve#ifndef lint 3827964Sstevestatic char sccsid[] = "@(#)rm.c 8.5 (Berkeley) 4/18/94"; 39114433Sobrien#endif /* not lint */ 4027964Ssteve#endif 4199110Sobrien#include <sys/cdefs.h> 4299110Sobrien__FBSDID("$FreeBSD: head/bin/rm/rm.c 241014 2012-09-27 23:31:12Z mdf $"); 431556Srgrimes 441556Srgrimes#include <sys/stat.h> 4547584Skris#include <sys/param.h> 4647584Skris#include <sys/mount.h> 471556Srgrimes 481556Srgrimes#include <err.h> 491556Srgrimes#include <errno.h> 501556Srgrimes#include <fcntl.h> 511556Srgrimes#include <fts.h> 5290644Simp#include <grp.h> 5390644Simp#include <pwd.h> 54241014Smdf#include <stdint.h> 551556Srgrimes#include <stdio.h> 561556Srgrimes#include <stdlib.h> 571556Srgrimes#include <string.h> 5850539Smharo#include <sysexits.h> 591556Srgrimes#include <unistd.h> 601556Srgrimes 61226961Sedstatic int dflag, eval, fflag, iflag, Pflag, vflag, Wflag, stdin_ok; 62226961Sedstatic int rflag, Iflag; 63226961Sedstatic uid_t uid; 64226961Sedstatic volatile sig_atomic_t info; 651556Srgrimes 6690110Simpint check(char *, char *, struct stat *); 67137009Sdelphijint check2(char **); 6890110Simpvoid checkdot(char **); 69136113Sdesvoid checkslash(char **); 7090110Simpvoid rm_file(char **); 71122409Sguidoint rm_overwrite(char *, struct stat *); 7290110Simpvoid rm_tree(char **); 73191670Simpstatic void siginfo(int __unused); 7490110Simpvoid usage(void); 751556Srgrimes 761556Srgrimes/* 771556Srgrimes * rm -- 781556Srgrimes * This rm is different from historic rm's, but is expected to match 79136112Sdes * POSIX 1003.2 behavior. The most visible difference is that -f 801556Srgrimes * has two specific effects now, ignore non-existent files and force 81136112Sdes * file removal. 821556Srgrimes */ 831556Srgrimesint 8490110Simpmain(int argc, char *argv[]) 851556Srgrimes{ 86137009Sdelphij int ch; 8754895Ssheldonh char *p; 881556Srgrimes 8954895Ssheldonh /* 9054895Ssheldonh * Test for the special case where the utility is called as 9154895Ssheldonh * "unlink", for which the functionality provided is greatly 9254895Ssheldonh * simplified. 9354895Ssheldonh */ 94219680Sjilles if ((p = strrchr(argv[0], '/')) == NULL) 9554895Ssheldonh p = argv[0]; 9654895Ssheldonh else 9754895Ssheldonh ++p; 9854895Ssheldonh if (strcmp(p, "unlink") == 0) { 9997533Stjr while (getopt(argc, argv, "") != -1) 10054895Ssheldonh usage(); 10197533Stjr argc -= optind; 10297533Stjr argv += optind; 10399858Stjr if (argc != 1) 10497533Stjr usage(); 10597533Stjr rm_file(&argv[0]); 10697533Stjr exit(eval); 10754895Ssheldonh } 10854895Ssheldonh 10920421Ssteve Pflag = rflag = 0; 110137009Sdelphij while ((ch = getopt(argc, argv, "dfiIPRrvW")) != -1) 1111556Srgrimes switch(ch) { 1121556Srgrimes case 'd': 1131556Srgrimes dflag = 1; 1141556Srgrimes break; 1151556Srgrimes case 'f': 1161556Srgrimes fflag = 1; 1171556Srgrimes iflag = 0; 1181556Srgrimes break; 1191556Srgrimes case 'i': 1201556Srgrimes fflag = 0; 1211556Srgrimes iflag = 1; 1221556Srgrimes break; 123137009Sdelphij case 'I': 124137009Sdelphij Iflag = 1; 125137009Sdelphij break; 1261556Srgrimes case 'P': 1271556Srgrimes Pflag = 1; 1281556Srgrimes break; 1291556Srgrimes case 'R': 1301556Srgrimes case 'r': /* Compatibility. */ 1311556Srgrimes rflag = 1; 1321556Srgrimes break; 13350872Smharo case 'v': 13450872Smharo vflag = 1; 13550872Smharo break; 13620421Ssteve case 'W': 13720421Ssteve Wflag = 1; 13820421Ssteve break; 1391556Srgrimes default: 1401556Srgrimes usage(); 1411556Srgrimes } 1421556Srgrimes argc -= optind; 1431556Srgrimes argv += optind; 1441556Srgrimes 14544282Sjkh if (argc < 1) { 14644282Sjkh if (fflag) 147122409Sguido return (0); 1481556Srgrimes usage(); 14944282Sjkh } 1501556Srgrimes 1511556Srgrimes checkdot(argv); 152136124Sdes if (getenv("POSIXLY_CORRECT") == NULL) 153136124Sdes checkslash(argv); 1547798Sache uid = geteuid(); 1551556Srgrimes 156191670Simp (void)signal(SIGINFO, siginfo); 15720421Ssteve if (*argv) { 15820421Ssteve stdin_ok = isatty(STDIN_FILENO); 15920421Ssteve 160137009Sdelphij if (Iflag) { 161137009Sdelphij if (check2(argv) == 0) 162137009Sdelphij exit (1); 163137009Sdelphij } 16420421Ssteve if (rflag) 16520421Ssteve rm_tree(argv); 16620421Ssteve else 16720421Ssteve rm_file(argv); 16820421Ssteve } 16920421Ssteve 1701556Srgrimes exit (eval); 1711556Srgrimes} 1721556Srgrimes 1731556Srgrimesvoid 17490110Simprm_tree(char **argv) 1751556Srgrimes{ 1761556Srgrimes FTS *fts; 1771556Srgrimes FTSENT *p; 1781556Srgrimes int needstat; 17920421Ssteve int flags; 1807798Sache int rval; 1811556Srgrimes 1821556Srgrimes /* 1831556Srgrimes * Remove a file hierarchy. If forcing removal (-f), or interactive 1841556Srgrimes * (-i) or can't ask anyway (stdin_ok), don't stat the file. 1851556Srgrimes */ 18620421Ssteve needstat = !uid || (!fflag && !iflag && stdin_ok); 1871556Srgrimes 1881556Srgrimes /* 1891556Srgrimes * If the -i option is specified, the user can skip on the pre-order 1901556Srgrimes * visit. The fts_number field flags skipped directories. 1911556Srgrimes */ 1921556Srgrimes#define SKIPPED 1 1931556Srgrimes 19451230Sbde flags = FTS_PHYSICAL; 19520421Ssteve if (!needstat) 19620421Ssteve flags |= FTS_NOSTAT; 19720421Ssteve if (Wflag) 19820421Ssteve flags |= FTS_WHITEOUT; 199137639Sjkh if (!(fts = fts_open(argv, flags, NULL))) { 200137639Sjkh if (fflag && errno == ENOENT) 201137639Sjkh return; 20299744Sdillon err(1, "fts_open"); 203137639Sjkh } 2041556Srgrimes while ((p = fts_read(fts)) != NULL) { 2051556Srgrimes switch (p->fts_info) { 2061556Srgrimes case FTS_DNR: 2071556Srgrimes if (!fflag || p->fts_errno != ENOENT) { 2081556Srgrimes warnx("%s: %s", 2091556Srgrimes p->fts_path, strerror(p->fts_errno)); 2101556Srgrimes eval = 1; 2111556Srgrimes } 2121556Srgrimes continue; 2131556Srgrimes case FTS_ERR: 2141556Srgrimes errx(1, "%s: %s", p->fts_path, strerror(p->fts_errno)); 2151556Srgrimes case FTS_NS: 2161556Srgrimes /* 217124041Skuriyama * Assume that since fts_read() couldn't stat the 218124041Skuriyama * file, it can't be unlinked. 2191556Srgrimes */ 2201556Srgrimes if (!needstat) 2211556Srgrimes break; 2221556Srgrimes if (!fflag || p->fts_errno != ENOENT) { 2231556Srgrimes warnx("%s: %s", 2241556Srgrimes p->fts_path, strerror(p->fts_errno)); 2251556Srgrimes eval = 1; 2261556Srgrimes } 2271556Srgrimes continue; 2281556Srgrimes case FTS_D: 2291556Srgrimes /* Pre-order: give user chance to skip. */ 23020421Ssteve if (!fflag && !check(p->fts_path, p->fts_accpath, 2311556Srgrimes p->fts_statp)) { 2321556Srgrimes (void)fts_set(fts, p, FTS_SKIP); 2331556Srgrimes p->fts_number = SKIPPED; 2341556Srgrimes } 2357798Sache else if (!uid && 2367798Sache (p->fts_statp->st_flags & (UF_APPEND|UF_IMMUTABLE)) && 2377798Sache !(p->fts_statp->st_flags & (SF_APPEND|SF_IMMUTABLE)) && 238193087Sjilles lchflags(p->fts_accpath, 2397798Sache p->fts_statp->st_flags &= ~(UF_APPEND|UF_IMMUTABLE)) < 0) 2407798Sache goto err; 2411556Srgrimes continue; 2421556Srgrimes case FTS_DP: 2431556Srgrimes /* Post-order: see if user skipped. */ 2441556Srgrimes if (p->fts_number == SKIPPED) 2451556Srgrimes continue; 2461556Srgrimes break; 24720421Ssteve default: 24820421Ssteve if (!fflag && 24920421Ssteve !check(p->fts_path, p->fts_accpath, p->fts_statp)) 25020421Ssteve continue; 2511556Srgrimes } 2521556Srgrimes 2537798Sache rval = 0; 2547798Sache if (!uid && 2557798Sache (p->fts_statp->st_flags & (UF_APPEND|UF_IMMUTABLE)) && 2567798Sache !(p->fts_statp->st_flags & (SF_APPEND|SF_IMMUTABLE))) 257193087Sjilles rval = lchflags(p->fts_accpath, 2587798Sache p->fts_statp->st_flags &= ~(UF_APPEND|UF_IMMUTABLE)); 25953819Smharo if (rval == 0) { 2607798Sache /* 2617798Sache * If we can't read or search the directory, may still be 2627798Sache * able to remove it. Don't print out the un{read,search}able 2637798Sache * message unless the remove fails. 2647798Sache */ 26520421Ssteve switch (p->fts_info) { 26620421Ssteve case FTS_DP: 26720421Ssteve case FTS_DNR: 26853819Smharo rval = rmdir(p->fts_accpath); 26953819Smharo if (rval == 0 || (fflag && errno == ENOENT)) { 27053819Smharo if (rval == 0 && vflag) 27150872Smharo (void)printf("%s\n", 27270219Sobrien p->fts_path); 273191670Simp if (rval == 0 && info) { 274191670Simp info = 0; 275191670Simp (void)printf("%s\n", 276191670Simp p->fts_path); 277191670Simp } 2781556Srgrimes continue; 27950539Smharo } 28020421Ssteve break; 28120421Ssteve 28220421Ssteve case FTS_W: 28353819Smharo rval = undelete(p->fts_accpath); 28453819Smharo if (rval == 0 && (fflag && errno == ENOENT)) { 28553819Smharo if (vflag) 28650872Smharo (void)printf("%s\n", 28770219Sobrien p->fts_path); 288191670Simp if (info) { 289191670Simp info = 0; 290191670Simp (void)printf("%s\n", 291191670Simp p->fts_path); 292191670Simp } 29320421Ssteve continue; 29450539Smharo } 29520421Ssteve break; 29620421Ssteve 297124041Skuriyama case FTS_NS: 298124041Skuriyama /* 299124041Skuriyama * Assume that since fts_read() couldn't stat 300124041Skuriyama * the file, it can't be unlinked. 301124041Skuriyama */ 302124041Skuriyama if (fflag) 303124041Skuriyama continue; 304124041Skuriyama /* FALLTHROUGH */ 305237339Sdelphij 306237339Sdelphij case FTS_F: 307237339Sdelphij case FTS_NSOK: 3087798Sache if (Pflag) 309237339Sdelphij if (!rm_overwrite(p->fts_accpath, p->fts_info == 310237339Sdelphij FTS_NSOK ? NULL : p->fts_statp)) 311122409Sguido continue; 312237339Sdelphij /* FALLTHROUGH */ 313237339Sdelphij 314237339Sdelphij default: 31553819Smharo rval = unlink(p->fts_accpath); 31653819Smharo if (rval == 0 || (fflag && errno == ENOENT)) { 31753819Smharo if (rval == 0 && vflag) 31850872Smharo (void)printf("%s\n", 31970219Sobrien p->fts_path); 320191670Simp if (rval == 0 && info) { 321191670Simp info = 0; 322191670Simp (void)printf("%s\n", 323191670Simp p->fts_path); 324191670Simp } 3257798Sache continue; 32650539Smharo } 3277798Sache } 3281556Srgrimes } 3297798Sacheerr: 3301556Srgrimes warn("%s", p->fts_path); 3311556Srgrimes eval = 1; 3321556Srgrimes } 3331556Srgrimes if (errno) 3341556Srgrimes err(1, "fts_read"); 335157770Smaxim fts_close(fts); 3361556Srgrimes} 3371556Srgrimes 3381556Srgrimesvoid 33990110Simprm_file(char **argv) 3401556Srgrimes{ 3411556Srgrimes struct stat sb; 34220421Ssteve int rval; 3431556Srgrimes char *f; 3441556Srgrimes 3451556Srgrimes /* 3461556Srgrimes * Remove a file. POSIX 1003.2 states that, by default, attempting 3471556Srgrimes * to remove a directory is an error, so must always stat the file. 3481556Srgrimes */ 3491556Srgrimes while ((f = *argv++) != NULL) { 3501556Srgrimes /* Assume if can't stat the file, can't unlink it. */ 3511556Srgrimes if (lstat(f, &sb)) { 35220421Ssteve if (Wflag) { 35320421Ssteve sb.st_mode = S_IFWHT|S_IWUSR|S_IRUSR; 35420421Ssteve } else { 35520421Ssteve if (!fflag || errno != ENOENT) { 35620421Ssteve warn("%s", f); 35720421Ssteve eval = 1; 35820421Ssteve } 35920421Ssteve continue; 3601556Srgrimes } 36120421Ssteve } else if (Wflag) { 36220421Ssteve warnx("%s: %s", f, strerror(EEXIST)); 36320421Ssteve eval = 1; 3641556Srgrimes continue; 3651556Srgrimes } 36620421Ssteve 36720421Ssteve if (S_ISDIR(sb.st_mode) && !dflag) { 3681556Srgrimes warnx("%s: is a directory", f); 3691556Srgrimes eval = 1; 3701556Srgrimes continue; 3711556Srgrimes } 37220421Ssteve if (!fflag && !S_ISWHT(sb.st_mode) && !check(f, f, &sb)) 3731556Srgrimes continue; 3747798Sache rval = 0; 375163485Smaxim if (!uid && !S_ISWHT(sb.st_mode) && 3767798Sache (sb.st_flags & (UF_APPEND|UF_IMMUTABLE)) && 3777798Sache !(sb.st_flags & (SF_APPEND|SF_IMMUTABLE))) 378193087Sjilles rval = lchflags(f, sb.st_flags & ~(UF_APPEND|UF_IMMUTABLE)); 37953819Smharo if (rval == 0) { 38020421Ssteve if (S_ISWHT(sb.st_mode)) 38120421Ssteve rval = undelete(f); 38220421Ssteve else if (S_ISDIR(sb.st_mode)) 3837798Sache rval = rmdir(f); 3847798Sache else { 3857798Sache if (Pflag) 386122409Sguido if (!rm_overwrite(f, &sb)) 387122409Sguido continue; 3887798Sache rval = unlink(f); 3897798Sache } 3901556Srgrimes } 3911556Srgrimes if (rval && (!fflag || errno != ENOENT)) { 3921556Srgrimes warn("%s", f); 3931556Srgrimes eval = 1; 3941556Srgrimes } 39553819Smharo if (vflag && rval == 0) 39650539Smharo (void)printf("%s\n", f); 397191670Simp if (info && rval == 0) { 398191670Simp info = 0; 399191670Simp (void)printf("%s\n", f); 400191670Simp } 4011556Srgrimes } 4021556Srgrimes} 4031556Srgrimes 4041556Srgrimes/* 4051556Srgrimes * rm_overwrite -- 4061556Srgrimes * Overwrite the file 3 times with varying bit patterns. 4071556Srgrimes * 4081556Srgrimes * XXX 4091556Srgrimes * This is a cheap way to *really* delete files. Note that only regular 4101556Srgrimes * files are deleted, directories (and therefore names) will remain. 411102230Strhodes * Also, this assumes a fixed-block file system (like FFS, or a V7 or a 412213582Suqs * System V file system). In a logging or COW file system, you'll have to 413213582Suqs * have kernel support. 4141556Srgrimes */ 415122409Sguidoint 41690110Simprm_overwrite(char *file, struct stat *sbp) 4171556Srgrimes{ 418237284Skevlo struct stat sb, sb2; 41947584Skris struct statfs fsb; 4201556Srgrimes off_t len; 42147584Skris int bsize, fd, wlen; 42247584Skris char *buf = NULL; 4231556Srgrimes 4241556Srgrimes fd = -1; 4251556Srgrimes if (sbp == NULL) { 4261556Srgrimes if (lstat(file, &sb)) 4271556Srgrimes goto err; 4281556Srgrimes sbp = &sb; 4291556Srgrimes } 4301556Srgrimes if (!S_ISREG(sbp->st_mode)) 431122409Sguido return (1); 432163812Sdelphij if (sbp->st_nlink > 1 && !fflag) { 433241014Smdf warnx("%s (inode %ju): not overwritten due to multiple links", 434241014Smdf file, (uintmax_t)sbp->st_ino); 435163812Sdelphij return (0); 436163777Sdelphij } 437237284Skevlo if ((fd = open(file, O_WRONLY|O_NONBLOCK|O_NOFOLLOW, 0)) == -1) 4381556Srgrimes goto err; 439237284Skevlo if (fstat(fd, &sb2)) 440237284Skevlo goto err; 441237284Skevlo if (sb2.st_dev != sbp->st_dev || sb2.st_ino != sbp->st_ino || 442237284Skevlo !S_ISREG(sb2.st_mode)) { 443237284Skevlo errno = EPERM; 444237284Skevlo goto err; 445237284Skevlo } 44647584Skris if (fstatfs(fd, &fsb) == -1) 44747584Skris goto err; 44847584Skris bsize = MAX(fsb.f_iosize, 1024); 44947584Skris if ((buf = malloc(bsize)) == NULL) 450122304Sbde err(1, "%s: malloc", file); 4511556Srgrimes 4521556Srgrimes#define PASS(byte) { \ 45347584Skris memset(buf, byte, bsize); \ 4541556Srgrimes for (len = sbp->st_size; len > 0; len -= wlen) { \ 45547584Skris wlen = len < bsize ? len : bsize; \ 4561556Srgrimes if (write(fd, buf, wlen) != wlen) \ 4571556Srgrimes goto err; \ 4581556Srgrimes } \ 4591556Srgrimes} 4601556Srgrimes PASS(0xff); 4611556Srgrimes if (fsync(fd) || lseek(fd, (off_t)0, SEEK_SET)) 4621556Srgrimes goto err; 4631556Srgrimes PASS(0x00); 4641556Srgrimes if (fsync(fd) || lseek(fd, (off_t)0, SEEK_SET)) 4651556Srgrimes goto err; 4661556Srgrimes PASS(0xff); 46747584Skris if (!fsync(fd) && !close(fd)) { 46847584Skris free(buf); 469122409Sguido return (1); 47047584Skris } 4711556Srgrimes 4721556Srgrimeserr: eval = 1; 47347584Skris if (buf) 47447584Skris free(buf); 475122304Sbde if (fd != -1) 476122304Sbde close(fd); 4771556Srgrimes warn("%s", file); 478122409Sguido return (0); 4791556Srgrimes} 4801556Srgrimes 4811556Srgrimes 4821556Srgrimesint 48390110Simpcheck(char *path, char *name, struct stat *sp) 4841556Srgrimes{ 4851556Srgrimes int ch, first; 48661749Sjoe char modep[15], *flagsp; 4871556Srgrimes 4881556Srgrimes /* Check -i first. */ 4891556Srgrimes if (iflag) 4901556Srgrimes (void)fprintf(stderr, "remove %s? ", path); 4911556Srgrimes else { 4921556Srgrimes /* 4931556Srgrimes * If it's not a symbolic link and it's unwritable and we're 494136112Sdes * talking to a terminal, ask. Symbolic links are excluded 4951556Srgrimes * because their permissions are meaningless. Check stdin_ok 4961556Srgrimes * first because we may not have stat'ed the file. 4971556Srgrimes */ 498150729Sdougb if (!stdin_ok || S_ISLNK(sp->st_mode) || 49920421Ssteve (!access(name, W_OK) && 5007798Sache !(sp->st_flags & (SF_APPEND|SF_IMMUTABLE)) && 50120421Ssteve (!(sp->st_flags & (UF_APPEND|UF_IMMUTABLE)) || !uid))) 5021556Srgrimes return (1); 5031556Srgrimes strmode(sp->st_mode, modep); 50461749Sjoe if ((flagsp = fflagstostr(sp->st_flags)) == NULL) 50599744Sdillon err(1, "fflagstostr"); 506150729Sdougb if (Pflag) 507150729Sdougb errx(1, 508150729Sdougb "%s: -P was specified, but file is not writable", 509150729Sdougb path); 51061749Sjoe (void)fprintf(stderr, "override %s%s%s/%s %s%sfor %s? ", 5111556Srgrimes modep + 1, modep[9] == ' ' ? "" : " ", 5121556Srgrimes user_from_uid(sp->st_uid, 0), 5137798Sache group_from_gid(sp->st_gid, 0), 514136112Sdes *flagsp ? flagsp : "", *flagsp ? " " : "", 5157798Sache path); 51661749Sjoe free(flagsp); 5171556Srgrimes } 5181556Srgrimes (void)fflush(stderr); 5191556Srgrimes 5201556Srgrimes first = ch = getchar(); 5211556Srgrimes while (ch != '\n' && ch != EOF) 5221556Srgrimes ch = getchar(); 52314409Swosch return (first == 'y' || first == 'Y'); 5241556Srgrimes} 5251556Srgrimes 526136113Sdes#define ISSLASH(a) ((a)[0] == '/' && (a)[1] == '\0') 527136113Sdesvoid 528136113Sdescheckslash(char **argv) 529136113Sdes{ 530136113Sdes char **t, **u; 531136113Sdes int complained; 532136113Sdes 533136113Sdes complained = 0; 534136113Sdes for (t = argv; *t;) { 535136113Sdes if (ISSLASH(*t)) { 536136113Sdes if (!complained++) 537136113Sdes warnx("\"/\" may not be removed"); 538136113Sdes eval = 1; 539136113Sdes for (u = t; u[0] != NULL; ++u) 540136113Sdes u[0] = u[1]; 541136113Sdes } else { 542136113Sdes ++t; 543136113Sdes } 544136113Sdes } 545136113Sdes} 546136113Sdes 547137009Sdelphijint 548137009Sdelphijcheck2(char **argv) 549137009Sdelphij{ 550137009Sdelphij struct stat st; 551137009Sdelphij int first; 552137009Sdelphij int ch; 553137009Sdelphij int fcount = 0; 554137009Sdelphij int dcount = 0; 555137009Sdelphij int i; 556137009Sdelphij const char *dname = NULL; 557137009Sdelphij 558137009Sdelphij for (i = 0; argv[i]; ++i) { 559137009Sdelphij if (lstat(argv[i], &st) == 0) { 560137009Sdelphij if (S_ISDIR(st.st_mode)) { 561137009Sdelphij ++dcount; 562137009Sdelphij dname = argv[i]; /* only used if 1 dir */ 563137009Sdelphij } else { 564137009Sdelphij ++fcount; 565137009Sdelphij } 566137009Sdelphij } 567137009Sdelphij } 568137009Sdelphij first = 0; 569137009Sdelphij while (first != 'n' && first != 'N' && first != 'y' && first != 'Y') { 570137009Sdelphij if (dcount && rflag) { 571137009Sdelphij fprintf(stderr, "recursively remove"); 572137009Sdelphij if (dcount == 1) 573137009Sdelphij fprintf(stderr, " %s", dname); 574137009Sdelphij else 575137009Sdelphij fprintf(stderr, " %d dirs", dcount); 576137009Sdelphij if (fcount == 1) 577137009Sdelphij fprintf(stderr, " and 1 file"); 578137009Sdelphij else if (fcount > 1) 579137009Sdelphij fprintf(stderr, " and %d files", fcount); 580137009Sdelphij } else if (dcount + fcount > 3) { 581137009Sdelphij fprintf(stderr, "remove %d files", dcount + fcount); 582137009Sdelphij } else { 583137009Sdelphij return(1); 584137009Sdelphij } 585137009Sdelphij fprintf(stderr, "? "); 586137009Sdelphij fflush(stderr); 587137009Sdelphij 588137009Sdelphij first = ch = getchar(); 589137009Sdelphij while (ch != '\n' && ch != EOF) 590137009Sdelphij ch = getchar(); 591137009Sdelphij if (ch == EOF) 592137009Sdelphij break; 593137009Sdelphij } 594137009Sdelphij return (first == 'y' || first == 'Y'); 595137009Sdelphij} 596137009Sdelphij 5972927Sphk#define ISDOT(a) ((a)[0] == '.' && (!(a)[1] || ((a)[1] == '.' && !(a)[2]))) 5981556Srgrimesvoid 59990110Simpcheckdot(char **argv) 6001556Srgrimes{ 6011556Srgrimes char *p, **save, **t; 6021556Srgrimes int complained; 6031556Srgrimes 6041556Srgrimes complained = 0; 6051556Srgrimes for (t = argv; *t;) { 6061556Srgrimes if ((p = strrchr(*t, '/')) != NULL) 6071556Srgrimes ++p; 6081556Srgrimes else 6091556Srgrimes p = *t; 6101556Srgrimes if (ISDOT(p)) { 6111556Srgrimes if (!complained++) 6121556Srgrimes warnx("\".\" and \"..\" may not be removed"); 6131556Srgrimes eval = 1; 61420421Ssteve for (save = t; (t[0] = t[1]) != NULL; ++t) 61520421Ssteve continue; 6161556Srgrimes t = save; 6171556Srgrimes } else 6181556Srgrimes ++t; 6191556Srgrimes } 6201556Srgrimes} 6211556Srgrimes 6221556Srgrimesvoid 62390110Simpusage(void) 6241556Srgrimes{ 62553819Smharo 62654895Ssheldonh (void)fprintf(stderr, "%s\n%s\n", 627137009Sdelphij "usage: rm [-f | -i] [-dIPRrvW] file ...", 62854895Ssheldonh " unlink file"); 62950539Smharo exit(EX_USAGE); 6301556Srgrimes} 631191670Simp 632191670Simpstatic void 633191670Simpsiginfo(int sig __unused) 634191670Simp{ 635191670Simp 636191670Simp info = 1; 637191670Simp} 638