b91b9e79ec
This reverts commit bb83eade39.
This commit causes the loop through dents at the end of main to
continue past the end of the dents array, causing a crash when
called with multiple directory arguments.
488 lines
9.4 KiB
C
488 lines
9.4 KiB
C
/* See LICENSE file for copyright and license details. */
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <dirent.h>
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#include <grp.h>
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#include <pwd.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <time.h>
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#include <unistd.h>
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#include "utf.h"
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#include "util.h"
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struct entry {
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char *name;
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mode_t mode, tmode;
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nlink_t nlink;
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uid_t uid;
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gid_t gid;
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off_t size;
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struct timespec t;
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dev_t dev;
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dev_t rdev;
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ino_t ino, tino;
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};
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static struct {
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dev_t dev;
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ino_t ino;
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} tree[PATH_MAX];
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static int ret = 0;
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static int Aflag = 0;
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static int aflag = 0;
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static int cflag = 0;
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static int dflag = 0;
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static int Fflag = 0;
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static int fflag = 0;
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static int Hflag = 0;
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static int hflag = 0;
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static int iflag = 0;
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static int Lflag = 0;
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static int lflag = 0;
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static int nflag = 0;
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static int pflag = 0;
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static int qflag = 0;
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static int Rflag = 0;
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static int rflag = 0;
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static int Uflag = 0;
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static int uflag = 0;
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static int first = 1;
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static char sort = 0;
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static size_t ds = 0;
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static void ls(const char *, const struct entry *, int);
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static void
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mkent(struct entry *ent, char *path, int dostat, int follow)
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{
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struct stat st;
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ent->name = path;
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if (!dostat)
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return;
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if ((follow ? stat : lstat)(path, &st) < 0)
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eprintf("%s %s:", follow ? "stat" : "lstat", path);
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ent->mode = st.st_mode;
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ent->nlink = st.st_nlink;
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ent->uid = st.st_uid;
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ent->gid = st.st_gid;
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ent->size = st.st_size;
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if (cflag)
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ent->t = st.st_ctim;
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else if (uflag)
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ent->t = st.st_atim;
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else
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ent->t = st.st_mtim;
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ent->dev = st.st_dev;
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ent->rdev = st.st_rdev;
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ent->ino = st.st_ino;
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if (S_ISLNK(ent->mode)) {
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if (stat(path, &st) == 0) {
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ent->tmode = st.st_mode;
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ent->dev = st.st_dev;
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ent->tino = st.st_ino;
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} else {
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ent->tmode = ent->tino = 0;
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}
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}
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}
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static char *
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indicator(mode_t mode)
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{
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if (pflag || Fflag)
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if (S_ISDIR(mode))
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return "/";
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if (Fflag) {
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if (S_ISLNK(mode))
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return "@";
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else if (S_ISFIFO(mode))
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return "|";
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else if (S_ISSOCK(mode))
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return "=";
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else if (mode & S_IXUSR || mode & S_IXGRP || mode & S_IXOTH)
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return "*";
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}
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return "";
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}
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static void
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output(const struct entry *ent)
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{
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struct group *gr;
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struct passwd *pw;
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struct tm *tm;
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ssize_t len;
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size_t l;
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char *name, *c, *u, *fmt, buf[BUFSIZ],
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pwname[_SC_LOGIN_NAME_MAX], grname[_SC_LOGIN_NAME_MAX],
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mode[] = "----------";
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Rune r;
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if (qflag) {
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name = emalloc(strlen(ent->name) + 1);
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for (c = name, u = ent->name; *u; u += l) {
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l = chartorune(&r, u);
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if (isprintrune(r)) {
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memcpy(c, u, l);
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c += l;
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} else {
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*c++ = '?';
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}
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}
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*c = '\0';
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} else {
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name = ent->name;
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}
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if (iflag)
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printf("%lu ", (unsigned long)ent->ino);
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if (!lflag) {
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printf("%s%s\n", name, indicator(ent->mode));
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goto cleanup;
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}
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if (S_ISREG(ent->mode))
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mode[0] = '-';
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else if (S_ISBLK(ent->mode))
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mode[0] = 'b';
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else if (S_ISCHR(ent->mode))
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mode[0] = 'c';
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else if (S_ISDIR(ent->mode))
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mode[0] = 'd';
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else if (S_ISFIFO(ent->mode))
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mode[0] = 'p';
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else if (S_ISLNK(ent->mode))
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mode[0] = 'l';
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else if (S_ISSOCK(ent->mode))
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mode[0] = 's';
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else
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mode[0] = '?';
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if (ent->mode & S_IRUSR) mode[1] = 'r';
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if (ent->mode & S_IWUSR) mode[2] = 'w';
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if (ent->mode & S_IXUSR) mode[3] = 'x';
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if (ent->mode & S_IRGRP) mode[4] = 'r';
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if (ent->mode & S_IWGRP) mode[5] = 'w';
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if (ent->mode & S_IXGRP) mode[6] = 'x';
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if (ent->mode & S_IROTH) mode[7] = 'r';
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if (ent->mode & S_IWOTH) mode[8] = 'w';
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if (ent->mode & S_IXOTH) mode[9] = 'x';
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if (ent->mode & S_ISUID) mode[3] = (mode[3] == 'x') ? 's' : 'S';
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if (ent->mode & S_ISGID) mode[6] = (mode[6] == 'x') ? 's' : 'S';
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if (ent->mode & S_ISVTX) mode[9] = (mode[9] == 'x') ? 't' : 'T';
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if (!nflag && (pw = getpwuid(ent->uid)))
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snprintf(pwname, sizeof(pwname), "%s", pw->pw_name);
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else
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snprintf(pwname, sizeof(pwname), "%d", ent->uid);
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if (!nflag && (gr = getgrgid(ent->gid)))
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snprintf(grname, sizeof(grname), "%s", gr->gr_name);
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else
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snprintf(grname, sizeof(grname), "%d", ent->gid);
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if (time(NULL) > ent->t.tv_sec + (180 * 24 * 60 * 60)) /* 6 months ago? */
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fmt = "%b %d %Y";
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else
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fmt = "%b %d %H:%M";
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if ((tm = localtime(&ent->t.tv_sec)))
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strftime(buf, sizeof(buf), fmt, tm);
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else
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snprintf(buf, sizeof(buf), "%lld", (long long)(ent->t.tv_sec));
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printf("%s %4ld %-8.8s %-8.8s ", mode, (long)ent->nlink, pwname, grname);
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if (S_ISBLK(ent->mode) || S_ISCHR(ent->mode))
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printf("%4u, %4u ", major(ent->rdev), minor(ent->rdev));
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else if (hflag)
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printf("%10s ", humansize(ent->size));
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else
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printf("%10lu ", (unsigned long)ent->size);
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printf("%s %s%s", buf, ent->name, indicator(ent->mode));
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if (S_ISLNK(ent->mode)) {
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if ((len = readlink(ent->name, buf, sizeof(buf) - 1)) < 0)
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eprintf("readlink %s:", ent->name);
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buf[len] = '\0';
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printf(" -> %s%s", buf, indicator(ent->tmode));
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}
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putchar('\n');
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cleanup:
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if (qflag)
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free(name);
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}
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static int
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entcmp(const void *va, const void *vb)
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{
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int cmp = 0;
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const struct entry *a = va, *b = vb;
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switch (sort) {
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case 'S':
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cmp = b->size - a->size;
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break;
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case 't':
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if (!(cmp = b->t.tv_sec - a->t.tv_sec))
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cmp = b->t.tv_nsec - a->t.tv_nsec;
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break;
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}
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if (!cmp)
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cmp = strcmp(a->name, b->name);
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return rflag ? 0 - cmp : cmp;
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}
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static void
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lsdir(const char *path, const struct entry *dir)
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{
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DIR *dp;
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struct entry *ent, *ents = NULL;
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struct dirent *d;
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size_t i, n = 0;
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char prefix[PATH_MAX];
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if (!(dp = opendir(dir->name))) {
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ret = 1;
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weprintf("opendir %s%s:", path, dir->name);
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return;
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}
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if (chdir(dir->name) < 0)
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eprintf("chdir %s:", dir->name);
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while ((d = readdir(dp))) {
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if (d->d_name[0] == '.' && !aflag && !Aflag)
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continue;
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else if (Aflag)
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if (strcmp(d->d_name, ".") == 0 ||
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strcmp(d->d_name, "..") == 0)
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continue;
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ents = ereallocarray(ents, ++n, sizeof(*ents));
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mkent(&ents[n - 1], estrdup(d->d_name), Fflag || iflag ||
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lflag || pflag || Rflag || sort, Lflag);
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}
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closedir(dp);
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if (!Uflag)
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qsort(ents, n, sizeof(*ents), entcmp);
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if (ds > 1 && (path[0] || dir->name[0] != '.'))
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printf("%s:\n", dir->name);
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for (i = 0; i < n; i++)
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output(&ents[i]);
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if (Rflag) {
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if (snprintf(prefix, PATH_MAX, "%s%s/", path, dir->name) >=
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PATH_MAX)
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eprintf("path too long: %s%s\n", path, dir->name);
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for (i = 0; i < n; i++) {
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ent = &ents[i];
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if (strcmp(ent->name, ".") == 0 ||
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strcmp(ent->name, "..") == 0)
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continue;
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if (S_ISLNK(ent->mode) && S_ISDIR(ent->tmode) && !Lflag)
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continue;
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ls(prefix, ent, Rflag);
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}
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}
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for (i = 0; i < n; ++i)
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free(ents[i].name);
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free(ents);
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}
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static int
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visit(const struct entry *ent)
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{
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dev_t dev;
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ino_t ino;
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int i;
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dev = ent->dev;
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ino = S_ISLNK(ent->mode) ? ent->tino : ent->ino;
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for (i = 0; i < PATH_MAX && tree[i].ino; ++i) {
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if (ino == tree[i].ino && dev == tree[i].dev)
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return -1;
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}
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tree[i].ino = ino;
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tree[i].dev = dev;
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return i;
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}
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static void
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ls(const char *path, const struct entry *ent, int listdir)
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{
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int treeind;
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char cwd[PATH_MAX];
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if (!listdir) {
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output(ent);
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} else if (S_ISDIR(ent->mode) ||
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(S_ISLNK(ent->mode) && S_ISDIR(ent->tmode))) {
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if ((treeind = visit(ent)) < 0) {
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ret = 1;
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weprintf("%s%s: Already visited\n", path, ent->name);
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return;
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}
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if (!getcwd(cwd, PATH_MAX))
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eprintf("getcwd:");
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if (first)
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first = !first;
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else
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putchar('\n');
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fputs(path, stdout);
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lsdir(path, ent);
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tree[treeind].ino = 0;
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if (chdir(cwd) < 0)
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eprintf("chdir %s:", cwd);
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}
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}
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static void
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usage(void)
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{
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eprintf("usage: %s [-1AacdFfHhiLlnpqRrtUu] [file ...]\n", argv0);
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}
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int
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main(int argc, char *argv[])
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{
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struct entry ent, *dents, *fents;
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size_t i, fs;
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ARGBEGIN {
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case '1':
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/* force output to 1 entry per line */
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qflag = 1;
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break;
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case 'A':
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Aflag = 1;
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break;
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case 'a':
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aflag = 1;
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break;
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case 'c':
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cflag = 1;
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uflag = 0;
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break;
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case 'd':
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dflag = 1;
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break;
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case 'f':
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aflag = 1;
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fflag = 1;
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Uflag = 1;
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break;
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case 'F':
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Fflag = 1;
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break;
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case 'H':
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Hflag = 1;
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break;
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case 'h':
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hflag = 1;
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break;
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case 'i':
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iflag = 1;
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break;
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case 'L':
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Lflag = 1;
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break;
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case 'l':
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lflag = 1;
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break;
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case 'n':
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lflag = 1;
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nflag = 1;
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break;
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case 'p':
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pflag = 1;
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break;
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case 'q':
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qflag = 1;
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break;
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case 'R':
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Rflag = 1;
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break;
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case 'r':
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rflag = 1;
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break;
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case 'S':
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sort = 'S';
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break;
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case 't':
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sort = 't';
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break;
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case 'U':
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Uflag = 1;
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break;
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case 'u':
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uflag = 1;
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cflag = 0;
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break;
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default:
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usage();
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} ARGEND
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switch (argc) {
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case 0: /* fallthrough */
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*--argv = ".", ++argc;
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case 1:
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mkent(&ent, argv[0], 1, Hflag || Lflag);
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ls("", &ent, (!dflag && S_ISDIR(ent.mode)) ||
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((S_ISLNK(ent.mode) && S_ISDIR(ent.tmode)) &&
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((Hflag || Lflag) || !(dflag || Fflag || lflag))));
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break;
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default:
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for (i = ds = fs = 0, fents = dents = NULL; i < argc; ++i) {
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mkent(&ent, argv[i], 1, Hflag || Lflag);
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if ((!dflag && S_ISDIR(ent.mode)) ||
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((S_ISLNK(ent.mode) && S_ISDIR(ent.tmode)) &&
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((Hflag || Lflag) || !(dflag || Fflag || lflag)))) {
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dents = ereallocarray(dents, ++ds, sizeof(*dents));
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memcpy(&dents[ds - 1], &ent, sizeof(ent));
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} else {
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fents = ereallocarray(fents, ++fs, sizeof(*fents));
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memcpy(&fents[fs - 1], &ent, sizeof(ent));
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}
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}
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qsort(fents, fs, sizeof(ent), entcmp);
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qsort(dents, ds, sizeof(ent), entcmp);
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for (i = 0; i < fs; ++i)
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ls("", &fents[i], 0);
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free(fents);
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if (fs && ds)
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putchar('\n');
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for (i = 0; i < ds; ++i)
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ls("", &dents[i], 1);
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free(dents);
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}
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return (fshut(stdout, "<stdout>") | ret);
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}
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