/*
* util.c --- utilities for the debugfs program
- *
+ *
* Copyright (C) 1993, 1994 Theodore Ts'o. This file may be
* redistributed under the terms of the GNU Public License.
*
*/
+#define _XOPEN_SOURCE 600 /* needed for strptime */
+
+#include "config.h"
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <signal.h>
+#ifdef HAVE_GETOPT_H
+#include <getopt.h>
+#else
+extern int optind;
+extern char *optarg;
+#endif
+#ifdef HAVE_OPTRESET
+extern int optreset; /* defined by BSD, but not others */
+#endif
+#include "ss/ss.h"
#include "debugfs.h"
+/*
+ * This function resets the libc getopt() function, which keeps
+ * internal state. Bad design! Stupid libc API designers! No
+ * biscuit!
+ *
+ * BSD-derived getopt() functions require that optind be reset to 1 in
+ * order to reset getopt() state. This used to be generally accepted
+ * way of resetting getopt(). However, glibc's getopt()
+ * has additional getopt() state beyond optind, and requires that
+ * optind be set zero to reset its state. So the unfortunate state of
+ * affairs is that BSD-derived versions of getopt() misbehave if
+ * optind is set to 0 in order to reset getopt(), and glibc's getopt()
+ * will core dump if optind is set 1 in order to reset getopt().
+ *
+ * More modern versions of BSD require that optreset be set to 1 in
+ * order to reset getopt(). Sigh. Standards, anyone?
+ *
+ * We hide the hair here.
+ */
+void reset_getopt(void)
+{
+#if defined(__GLIBC__) || defined(__linux__)
+ optind = 0;
+#else
+ optind = 1;
+#endif
+#ifdef HAVE_OPTRESET
+ optreset = 1; /* Makes BSD getopt happy */
+#endif
+}
+
+static const char *pager_search_list[] = { "pager", "more", "less", 0 };
+static const char *pager_dir_list[] = { "/usr/bin", "/bin", 0 };
+
+static const char *find_pager(char *buf)
+{
+ const char **i, **j;
+
+ for (i = pager_search_list; *i; i++) {
+ for (j = pager_dir_list; *j; j++) {
+ sprintf(buf, "%s/%s", *j, *i);
+ if (access(buf, X_OK) == 0)
+ return(buf);
+ }
+ }
+ return 0;
+}
+
FILE *open_pager(void)
{
- FILE *outfile;
- const char *pager = getenv("PAGER");
+ FILE *outfile = 0;
+ const char *pager = ss_safe_getenv("DEBUGFS_PAGER");
+ char buf[80];
signal(SIGPIPE, SIG_IGN);
+ if (!isatty(1))
+ return stdout;
if (!pager)
- pager = "more";
-
- outfile = popen(pager, "w");
- if (!outfile)
- outfile = stdout;
-
- return (outfile);
+ pager = ss_safe_getenv("PAGER");
+ if (!pager)
+ pager = find_pager(buf);
+ if (!pager ||
+ (strcmp(pager, "__none__") == 0) ||
+ ((outfile = popen(pager, "w")) == 0))
+ return stdout;
+ return outfile;
}
void close_pager(FILE *stream)
*/
if ((len > 2) && (str[0] == '<') && (str[len-1] == '>')) {
ino = strtoul(str+1, &end, 0);
- if (*end=='>')
+ if (*end=='>' && (ino <= current_fs->super->s_inodes_count))
return ino;
}
retval = ext2fs_namei(current_fs, root, cwd, str, &ino);
if (retval) {
- com_err(str, retval, "");
+ com_err(str, retval, 0);
+ return 0;
+ }
+ if (ino > current_fs->super->s_inodes_count) {
+ com_err(str, 0, "resolves to an illegal inode number: %u\n",
+ ino);
return 0;
}
return ino;
return 0;
}
+char *inode_time_to_string(__u32 xtime, __u32 xtime_extra)
+{
+ __s64 t = (__s32) xtime;
+
+ t += (__s64) (xtime_extra & EXT4_EPOCH_MASK) << 32;
+ return time_to_string(t);
+}
+
/*
- * This function takes a __u32 time value and converts it to a string,
+ * This function takes a __s64 time value and converts it to a string,
* using ctime
*/
-char *time_to_string(__u32 cl)
+char *time_to_string(__s64 cl)
+{
+ static int do_gmt = -1;
+ time_t t = (time_t) cl;
+ const char *tz;
+
+ if (do_gmt == -1) {
+ /* The diet libc doesn't respect the TZ environment variable */
+ tz = ss_safe_getenv("TZ");
+ if (!tz)
+ tz = "";
+ do_gmt = !strcmp(tz, "GMT") || !strcmp(tz, "GMT0");
+ }
+
+ return asctime((do_gmt) ? gmtime(&t) : localtime(&t));
+}
+
+/*
+ * Parse a string as a time. Return ((time_t)-1) if the string
+ * doesn't appear to be a sane time.
+ */
+extern __s64 string_to_time(const char *arg)
+{
+ struct tm ts;
+ __s64 ret;
+ char *tmp;
+
+ if (strcmp(arg, "now") == 0) {
+ return time(0);
+ }
+ if (arg[0] == '@') {
+ /* interpret it as an integer */
+ arg++;
+ fallback:
+ ret = strtoll(arg, &tmp, 0);
+ if (*tmp)
+ return -1;
+ return ret;
+ }
+ memset(&ts, 0, sizeof(ts));
+#ifdef HAVE_STRPTIME
+ tmp = strptime(arg, "%Y%m%d%H%M%S", &ts);
+ if (tmp == NULL)
+ tmp = strptime(arg, "%Y%m%d%H%M", &ts);
+ if (tmp == NULL)
+ tmp = strptime(arg, "%Y%m%d", &ts);
+ if (tmp == NULL)
+ goto fallback;
+#else
+ sscanf(arg, "%4d%2d%2d%2d%2d%2d", &ts.tm_year, &ts.tm_mon,
+ &ts.tm_mday, &ts.tm_hour, &ts.tm_min, &ts.tm_sec);
+ ts.tm_year -= 1900;
+ ts.tm_mon -= 1;
+ if (ts.tm_year < 0 || ts.tm_mon < 0 || ts.tm_mon > 11 ||
+ ts.tm_mday <= 0 || ts.tm_mday > 31 || ts.tm_hour > 23 ||
+ ts.tm_min > 59 || ts.tm_sec > 61)
+ goto fallback;
+#endif
+ ts.tm_isdst = -1;
+ /* strptime() may only update the specified fields, which does not
+ * necessarily include ts.tm_yday (%j). Calculate this if unset:
+ *
+ * Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
+ * 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31
+ *
+ * Start with 31 days per month. Even months have only 30 days, but
+ * reverse in August, subtract one day for those months. February has
+ * only 28 days, not 30, subtract two days. Add day of month, minus
+ * one, since day is not finished yet. Leap years handled afterward. */
+ if (ts.tm_yday == 0)
+ ts.tm_yday = (ts.tm_mon * 31) -
+ ((ts.tm_mon - (ts.tm_mon > 7)) / 2) -
+ 2 * (ts.tm_mon > 1) + ts.tm_mday - 1;
+ ret = ts.tm_sec + ts.tm_min*60 + ts.tm_hour*3600 + ts.tm_yday*86400 +
+ ((__s64) ts.tm_year-70)*31536000 +
+ (((__s64) ts.tm_year-69)/4)*86400 -
+ (((__s64) ts.tm_year-1)/100)*86400 +
+ (((__s64) ts.tm_year+299)/400)*86400;
+ return ret;
+}
+
+/*
+ * This function will convert a string to an unsigned long, printing
+ * an error message if it fails, and returning success or failure in err.
+ */
+unsigned long parse_ulong(const char *str, const char *cmd,
+ const char *descr, int *err)
+{
+ char *tmp;
+ unsigned long ret;
+
+ ret = strtoul(str, &tmp, 0);
+ if (*tmp == 0) {
+ if (err)
+ *err = 0;
+ return ret;
+ }
+ com_err(cmd, 0, "Bad %s - %s", descr, str);
+ if (err)
+ *err = 1;
+ else
+ exit(1);
+ return 0;
+}
+
+/*
+ * This function will convert a string to an unsigned long long, printing
+ * an error message if it fails, and returning success or failure in err.
+ */
+unsigned long long parse_ulonglong(const char *str, const char *cmd,
+ const char *descr, int *err)
+{
+ char *tmp;
+ unsigned long long ret;
+
+ ret = strtoull(str, &tmp, 0);
+ if (*tmp == 0) {
+ if (err)
+ *err = 0;
+ return ret;
+ }
+ com_err(cmd, 0, "Bad %s - %s", descr, str);
+ if (err)
+ *err = 1;
+ else
+ exit(1);
+ return 0;
+}
+
+/*
+ * This function will convert a string to a block number. It returns
+ * 0 on success, 1 on failure. On failure, it outputs either an optionally
+ * specified error message or a default.
+ */
+int strtoblk(const char *cmd, const char *str, const char *errmsg,
+ blk64_t *ret)
+{
+ blk64_t blk;
+ int err;
+
+ if (errmsg == NULL)
+ blk = parse_ulonglong(str, cmd, "block number", &err);
+ else
+ blk = parse_ulonglong(str, cmd, errmsg, &err);
+ *ret = blk;
+ return err;
+}
+
+/*
+ * This is a common helper function used by the command processing
+ * routines
+ */
+int common_args_process(int argc, char *argv[], int min_argc, int max_argc,
+ const char *cmd, const char *usage, int flags)
+{
+ if (argc < min_argc || argc > max_argc) {
+ com_err(argv[0], 0, "Usage: %s %s", cmd, usage);
+ return 1;
+ }
+ if (flags & CHECK_FS_NOTOPEN) {
+ if (check_fs_not_open(argv[0]))
+ return 1;
+ } else {
+ if (check_fs_open(argv[0]))
+ return 1;
+ }
+ if ((flags & CHECK_FS_RW) && check_fs_read_write(argv[0]))
+ return 1;
+ if ((flags & CHECK_FS_BITMAPS) && check_fs_bitmaps(argv[0]))
+ return 1;
+ return 0;
+}
+
+/*
+ * This is a helper function used by do_stat, do_freei, do_seti, and
+ * do_testi, etc. Basically, any command which takes a single
+ * argument which is a file/inode number specifier.
+ */
+int common_inode_args_process(int argc, char *argv[],
+ ext2_ino_t *inode, int flags)
{
- time_t t = (time_t) cl;
+ if (common_args_process(argc, argv, 2, 2, argv[0], "<file>", flags))
+ return 1;
+
+ *inode = string_to_inode(argv[1]);
+ if (!*inode)
+ return 1;
+ return 0;
+}
+
+/*
+ * This is a helper function used by do_freeb, do_setb, and do_testb
+ */
+int common_block_args_process(int argc, char *argv[],
+ blk64_t *block, blk64_t *count)
+{
+ int err;
+
+ if (common_args_process(argc, argv, 2, 3, argv[0],
+ "<block> [count]", CHECK_FS_BITMAPS))
+ return 1;
+
+ if (strtoblk(argv[0], argv[1], NULL, block))
+ return 1;
+ if (*block == 0) {
+ com_err(argv[0], 0, "Invalid block number 0");
+ return 1;
+ }
+
+ if (argc > 2) {
+ err = strtoblk(argv[0], argv[2], "count", count);
+ if (err)
+ return 1;
+ }
+ return 0;
+}
- return ctime(&t);
+int debugfs_read_inode2(ext2_ino_t ino, struct ext2_inode * inode,
+ const char *cmd, int bufsize, int flags)
+{
+ int retval;
+
+ retval = ext2fs_read_inode2(current_fs, ino, inode, bufsize, flags);
+ if (retval) {
+ com_err(cmd, retval, "while reading inode %u", ino);
+ return 1;
+ }
+ return 0;
}
+int debugfs_read_inode(ext2_ino_t ino, struct ext2_inode * inode,
+ const char *cmd)
+{
+ int retval;
-
+ retval = ext2fs_read_inode(current_fs, ino, inode);
+ if (retval) {
+ com_err(cmd, retval, "while reading inode %u", ino);
+ return 1;
+ }
+ return 0;
+}
+int debugfs_write_inode2(ext2_ino_t ino,
+ struct ext2_inode *inode,
+ const char *cmd,
+ int bufsize, int flags)
+{
+ int retval;
+
+ retval = ext2fs_write_inode2(current_fs, ino, inode, bufsize, flags);
+ if (retval) {
+ com_err(cmd, retval, "while writing inode %u", ino);
+ return 1;
+ }
+ return 0;
+}
+
+int debugfs_write_inode(ext2_ino_t ino, struct ext2_inode * inode,
+ const char *cmd)
+{
+ int retval;
+
+ retval = ext2fs_write_inode(current_fs, ino, inode);
+ if (retval) {
+ com_err(cmd, retval, "while writing inode %u", ino);
+ return 1;
+ }
+ return 0;
+}
+
+int debugfs_write_new_inode(ext2_ino_t ino, struct ext2_inode * inode,
+ const char *cmd)
+{
+ int retval;
+
+ retval = ext2fs_write_new_inode(current_fs, ino, inode);
+ if (retval) {
+ com_err(cmd, retval, "while creating inode %u", ino);
+ return 1;
+ }
+ return 0;
+}
+
+/*
+ * Given a mode, return the ext2 file type
+ */
+int ext2_file_type(unsigned int mode)
+{
+ if (LINUX_S_ISREG(mode))
+ return EXT2_FT_REG_FILE;
+
+ if (LINUX_S_ISDIR(mode))
+ return EXT2_FT_DIR;
+
+ if (LINUX_S_ISCHR(mode))
+ return EXT2_FT_CHRDEV;
+
+ if (LINUX_S_ISBLK(mode))
+ return EXT2_FT_BLKDEV;
+
+ if (LINUX_S_ISLNK(mode))
+ return EXT2_FT_SYMLINK;
+
+ if (LINUX_S_ISFIFO(mode))
+ return EXT2_FT_FIFO;
+
+ if (LINUX_S_ISSOCK(mode))
+ return EXT2_FT_SOCK;
+
+ return 0;
+}
+
+errcode_t read_list(char *str, blk64_t **list, size_t *len)
+{
+ blk64_t *lst = *list;
+ size_t ln = *len;
+ char *tok, *p = str;
+ errcode_t retval;
+
+ while ((tok = strtok(p, ","))) {
+ blk64_t *l;
+ blk64_t x, y;
+ char *e;
+
+ errno = 0;
+ y = x = strtoull(tok, &e, 0);
+ if (errno)
+ return errno;
+ if (*e == '-') {
+ y = strtoull(e + 1, NULL, 0);
+ if (errno)
+ return errno;
+ } else if (*e != 0) {
+ retval = EINVAL;
+ goto err;
+ }
+ if (y < x) {
+ retval = EINVAL;
+ goto err;
+ }
+ l = realloc(lst, sizeof(blk64_t) * (ln + y - x + 1));
+ if (l == NULL) {
+ retval = ENOMEM;
+ goto err;
+ }
+ lst = l;
+ for (; x <= y; x++)
+ lst[ln++] = x;
+ p = NULL;
+ }
+
+ *list = lst;
+ *len = ln;
+ return 0;
+err:
+ free(lst);
+ return retval;
+}
git://git.whamcloud.com / tools / e2fsprogs.git / blobdiff