diff options
Diffstat (limited to 'misc-utils/rename.c')
| -rw-r--r-- | misc-utils/rename.c | 313 |
1 files changed, 313 insertions, 0 deletions
diff --git a/misc-utils/rename.c b/misc-utils/rename.c new file mode 100644 index 0000000..1d93157 --- /dev/null +++ b/misc-utils/rename.c @@ -0,0 +1,313 @@ +/* + * 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 "rpmatch.h" + +#define RENAME_EXIT_SOMEOK 2 +#define RENAME_EXIT_NOTHING 4 +#define RENAME_EXIT_UNEXPLAINED 64 + +static int tty_cbreak = 0; + +static int string_replace(char *from, char *to, char *s, char *orig, char **newname) +{ + char *p, *q, *where; + + where = strstr(s, from); + if (where == NULL) + return 1; + p = orig; + *newname = xmalloc(strlen(orig) + strlen(to) + 1); + q = *newname; + while (p < where) + *q++ = *p++; + p = to; + while (*p) + *q++ = *p++; + p = where + strlen(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; + else + 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; + 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); + if (readlink(s, target, sb.st_size + 1) < 0) { + warn(_("%s: readlink failed"), s); + free(target); + return 2; + } + target[sb.st_size] = '\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; + + if (access(s, F_OK) != 0) { + warn(_("%s: not accessible"), 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(_(" -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'}, + {"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} + }; + + setlocale(LC_ALL, ""); + bindtextdomain(PACKAGE, LOCALEDIR); + textdomain(PACKAGE); + atexit(close_stdout); + + while ((c = getopt_long(argc, argv, "vsVhnoi", longopts, NULL)) != -1) + switch (c) { + case 'n': + noact = 1; + break; + case 'v': + verbose = 1; + break; + case 'o': + nooverwrite = 1; + interactive = 0; + break; + case 'i': + interactive = 1; + nooverwrite = 0; + break; + case 's': + do_rename = do_symlink; + break; + case 'V': + printf(UTIL_LINUX_VERSION); + return 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; + } +} |