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-rw-r--r--misc-utils/rename.c359
1 files changed, 359 insertions, 0 deletions
diff --git a/misc-utils/rename.c b/misc-utils/rename.c
new file mode 100644
index 0000000..9979ab1
--- /dev/null
+++ b/misc-utils/rename.c
@@ -0,0 +1,359 @@
+/*
+ * rename.c - aeb 2000-01-01
+ *
+--------------------------------------------------------------
+#!/bin/sh
+if [ $# -le 2 ]; then echo call: rename from to files; exit; fi
+FROM="$1"
+TO="$2"
+shift
+shift
+for i in $@; do N=`echo "$i" | sed "s/$FROM/$TO/g"`; mv "$i" "$N"; done
+--------------------------------------------------------------
+ * This shell script will do renames of files, but may fail
+ * in cases involving special characters. Here a C version.
+ */
+#include <stdio.h>
+#ifdef HAVE_STDIO_EXT_H
+# include <stdio_ext.h>
+#endif
+#ifndef HAVE___FPURGE
+# ifdef HAVE_FPURGE
+# define HAVE___FPURGE 1
+# define __fpurge fpurge
+# endif
+#endif
+#include <string.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <getopt.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <termios.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#include "nls.h"
+#include "xalloc.h"
+#include "c.h"
+#include "closestream.h"
+#include "optutils.h"
+#include "rpmatch.h"
+
+#define RENAME_EXIT_SOMEOK 2
+#define RENAME_EXIT_NOTHING 4
+#define RENAME_EXIT_UNEXPLAINED 64
+
+static int tty_cbreak = 0;
+static int all = 0;
+static int last = 0;
+
+static int string_replace(char *from, char *to, char *s, char *orig, char **newname)
+{
+ char *p, *q, *where;
+ size_t count = 0, fromlen = strlen(from);
+
+ p = where = strstr(s, from);
+ if (where == NULL)
+ return 1;
+ count++;
+ while ((all || last) && p) {
+ p = strstr(p + (last ? 1 : fromlen), from);
+ if (p) {
+ if (all)
+ count++;
+ if (last)
+ where = p;
+ }
+ }
+ p = orig;
+ *newname = xmalloc(strlen(orig) - count * fromlen + count * strlen(to) + 1);
+ q = *newname;
+ while (count--) {
+ while (p < where)
+ *q++ = *p++;
+ p = to;
+ while (*p)
+ *q++ = *p++;
+ p = where + fromlen;
+ where = strstr(p, from);
+ }
+ while (*p)
+ *q++ = *p++;
+ *q = 0;
+ return 0;
+}
+
+static int ask(char *name)
+{
+ int c;
+ char buf[2];
+ printf(_("%s: overwrite `%s'? "), program_invocation_short_name, name);
+ fflush(stdout);
+ if ((c = fgetc(stdin)) == EOF) {
+ buf[0] = 'n';
+ printf("n\n");
+ }
+ else {
+ buf[0] = c;
+ if (c != '\n' && tty_cbreak) {
+#ifdef HAVE___FPURGE
+ /* Possibly purge a multi-byte character; or do a
+ required purge of the rest of the line (including
+ the newline) if the tty has been put back in
+ canonical mode (for example by a shell after a
+ SIGTSTP signal). */
+ __fpurge(stdin);
+#endif
+ printf("\n");
+ }
+ else if (c != '\n')
+ while ((c = fgetc(stdin)) != '\n' && c != EOF);
+ }
+ buf[1] = '\0';
+ if (rpmatch(buf) == RPMATCH_YES)
+ return 0;
+
+ return 1;
+}
+
+static int do_symlink(char *from, char *to, char *s, int verbose, int noact,
+ int nooverwrite, int interactive)
+{
+ char *newname = NULL, *target = NULL;
+ int ret = 1;
+ ssize_t ssz;
+ struct stat sb;
+
+ if ( faccessat(AT_FDCWD, s, F_OK, AT_SYMLINK_NOFOLLOW) != 0 &&
+ errno != EINVAL )
+ /* Skip if AT_SYMLINK_NOFOLLOW is not supported; lstat() below will
+ detect the access error */
+ {
+ warn(_("%s: not accessible"), s);
+ return 2;
+ }
+
+ if (lstat(s, &sb) == -1) {
+ warn(_("stat of %s failed"), s);
+ return 2;
+ }
+ if (!S_ISLNK(sb.st_mode)) {
+ warnx(_("%s: not a symbolic link"), s);
+ return 2;
+ }
+ target = xmalloc(sb.st_size + 1);
+
+ ssz = readlink(s, target, sb.st_size + 1);
+ if (ssz < 0) {
+ warn(_("%s: readlink failed"), s);
+ free(target);
+ return 2;
+ }
+ target[ssz] = '\0';
+
+ if (string_replace(from, to, target, target, &newname) != 0)
+ ret = 0;
+
+ if (ret == 1 && (nooverwrite || interactive) && lstat(newname, &sb) != 0)
+ nooverwrite = interactive = 0;
+
+ if ( ret == 1 &&
+ (nooverwrite || (interactive && (noact || ask(newname) != 0))) )
+ {
+ if (verbose)
+ printf(_("Skipping existing link: `%s' -> `%s'\n"), s, target);
+ ret = 0;
+ }
+
+ if (ret == 1) {
+ if (!noact && 0 > unlink(s)) {
+ warn(_("%s: unlink failed"), s);
+ ret = 2;
+ }
+ else if (!noact && symlink(newname, s) != 0) {
+ warn(_("%s: symlinking to %s failed"), s, newname);
+ ret = 2;
+ }
+ }
+ if (verbose && (noact || ret == 1))
+ printf("%s: `%s' -> `%s'\n", s, target, newname);
+ free(newname);
+ free(target);
+ return ret;
+}
+
+static int do_file(char *from, char *to, char *s, int verbose, int noact,
+ int nooverwrite, int interactive)
+{
+ char *newname = NULL, *file=NULL;
+ int ret = 1;
+ struct stat sb;
+
+ if ( faccessat(AT_FDCWD, s, F_OK, AT_SYMLINK_NOFOLLOW) != 0 &&
+ errno != EINVAL )
+ /* Skip if AT_SYMLINK_NOFOLLOW is not supported; lstat() below will
+ detect the access error */
+ {
+ warn(_("%s: not accessible"), s);
+ return 2;
+ }
+
+ if (lstat(s, &sb) == -1) {
+ warn(_("stat of %s failed"), s);
+ return 2;
+ }
+ if (strchr(from, '/') == NULL && strchr(to, '/') == NULL)
+ file = strrchr(s, '/');
+ if (file == NULL)
+ file = s;
+ if (string_replace(from, to, file, s, &newname) != 0)
+ return 0;
+
+ if ((nooverwrite || interactive) && access(newname, F_OK) != 0)
+ nooverwrite = interactive = 0;
+
+ if (nooverwrite || (interactive && (noact || ask(newname) != 0))) {
+ if (verbose)
+ printf(_("Skipping existing file: `%s'\n"), newname);
+ ret = 0;
+ }
+ else if (!noact && rename(s, newname) != 0) {
+ warn(_("%s: rename to %s failed"), s, newname);
+ ret = 2;
+ }
+ if (verbose && (noact || ret == 1))
+ printf("`%s' -> `%s'\n", s, newname);
+ free(newname);
+ return ret;
+}
+
+static void __attribute__((__noreturn__)) usage(void)
+{
+ FILE *out = stdout;
+ fputs(USAGE_HEADER, out);
+ fprintf(out,
+ _(" %s [options] <expression> <replacement> <file>...\n"),
+ program_invocation_short_name);
+
+ fputs(USAGE_SEPARATOR, out);
+ fputs(_("Rename files.\n"), out);
+
+ fputs(USAGE_OPTIONS, out);
+ fputs(_(" -v, --verbose explain what is being done\n"), out);
+ fputs(_(" -s, --symlink act on the target of symlinks\n"), out);
+ fputs(_(" -n, --no-act do not make any changes\n"), out);
+ fputs(_(" -a, --all replace all occurrences\n"), out);
+ fputs(_(" -l, --last replace only the last occurrence\n"), out);
+ fputs(_(" -o, --no-overwrite don't overwrite existing files\n"), out);
+ fputs(_(" -i, --interactive prompt before overwrite\n"), out);
+ fputs(USAGE_SEPARATOR, out);
+ printf(USAGE_HELP_OPTIONS(21));
+ printf(USAGE_MAN_TAIL("rename(1)"));
+ exit(EXIT_SUCCESS);
+}
+
+int main(int argc, char **argv)
+{
+ char *from, *to;
+ int i, c, ret = 0, verbose = 0, noact = 0, nooverwrite = 0, interactive = 0;
+ struct termios tio;
+ int (*do_rename)(char *from, char *to, char *s, int verbose, int noact,
+ int nooverwrite, int interactive) = do_file;
+
+ static const struct option longopts[] = {
+ {"verbose", no_argument, NULL, 'v'},
+ {"version", no_argument, NULL, 'V'},
+ {"help", no_argument, NULL, 'h'},
+ {"all", no_argument, NULL, 'a'},
+ {"last", no_argument, NULL, 'l'},
+ {"no-act", no_argument, NULL, 'n'},
+ {"no-overwrite", no_argument, NULL, 'o'},
+ {"interactive", no_argument, NULL, 'i'},
+ {"symlink", no_argument, NULL, 's'},
+ {NULL, 0, NULL, 0}
+ };
+ static const ul_excl_t excl[] = { /* rows and cols in ASCII order */
+ { 'a','l' },
+ { 'i','o' },
+ { 0 }
+ };
+ int excl_st[ARRAY_SIZE(excl)] = UL_EXCL_STATUS_INIT;
+
+ setlocale(LC_ALL, "");
+ bindtextdomain(PACKAGE, LOCALEDIR);
+ textdomain(PACKAGE);
+ close_stdout_atexit();
+
+ while ((c = getopt_long(argc, argv, "vsVhnaloi", longopts, NULL)) != -1) {
+ err_exclusive_options(c, longopts, excl, excl_st);
+ switch (c) {
+ case 'n':
+ noact = 1;
+ break;
+ case 'a':
+ all = 1;
+ break;
+ case 'l':
+ last = 1;
+ break;
+ case 'v':
+ verbose = 1;
+ break;
+ case 'o':
+ nooverwrite = 1;
+ break;
+ case 'i':
+ interactive = 1;
+ break;
+ case 's':
+ do_rename = do_symlink;
+ break;
+
+ case 'V':
+ print_version(EXIT_SUCCESS);
+ case 'h':
+ usage();
+ default:
+ errtryhelp(EXIT_FAILURE);
+ }
+ }
+
+ argc -= optind;
+ argv += optind;
+
+ if (argc < 3) {
+ warnx(_("not enough arguments"));
+ errtryhelp(EXIT_FAILURE);
+ }
+
+ from = argv[0];
+ to = argv[1];
+
+ if (!strcmp(from, to))
+ return RENAME_EXIT_NOTHING;
+
+ tty_cbreak = 0;
+ if (interactive && isatty(STDIN_FILENO) != 0) {
+ if (tcgetattr(STDIN_FILENO, &tio) != 0)
+ warn(_("failed to get terminal attributes"));
+ else if (!(tio.c_lflag & ICANON) && tio.c_cc[VMIN] == 1)
+ tty_cbreak = 1;
+ }
+
+ for (i = 2; i < argc; i++)
+ ret |= do_rename(from, to, argv[i], verbose, noact, nooverwrite, interactive);
+
+ switch (ret) {
+ case 0:
+ return RENAME_EXIT_NOTHING;
+ case 1:
+ return EXIT_SUCCESS;
+ case 2:
+ return EXIT_FAILURE;
+ case 3:
+ return RENAME_EXIT_SOMEOK;
+ default:
+ return RENAME_EXIT_UNEXPLAINED;
+ }
+}
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