diff options
Diffstat (limited to '')
| -rw-r--r-- | tools/gpgtar.c | 158 |
1 files changed, 150 insertions, 8 deletions
diff --git a/tools/gpgtar.c b/tools/gpgtar.c index 04d23b578..2968fb5fc 100644 --- a/tools/gpgtar.c +++ b/tools/gpgtar.c @@ -28,6 +28,7 @@ #include <config.h> #include <assuan.h> +#include <ctype.h> #include <errno.h> #include <npth.h> #include <stdio.h> @@ -41,6 +42,7 @@ #include "../common/asshelp.h" #include "../common/openpgpdefs.h" #include "../common/init.h" +#include "../common/strlist.h" #include "gpgtar.h" @@ -70,7 +72,10 @@ enum cmd_and_opt_values oOpenPGP, oCMS, oSetFilename, - oNull + oNull, + + /* Compatibility with gpg-zip. */ + oTarArgs, }; @@ -90,18 +95,35 @@ static ARGPARSE_OPTS opts[] = { ARGPARSE_s_s (oUser, "local-user", N_("|USER-ID|use USER-ID to sign or decrypt")), ARGPARSE_s_s (oOutput, "output", N_("|FILE|write output to FILE")), - ARGPARSE_s_s (oDirectory, "directory", - N_("|DIRECTORY|extract files into DIRECTORY")), ARGPARSE_s_n (oVerbose, "verbose", N_("verbose")), ARGPARSE_s_n (oQuiet, "quiet", N_("be somewhat more quiet")), ARGPARSE_s_s (oGpgProgram, "gpg", "@"), ARGPARSE_s_n (oSkipCrypto, "skip-crypto", N_("skip the crypto processing")), ARGPARSE_s_s (oSetFilename, "set-filename", "@"), + ARGPARSE_s_n (oOpenPGP, "openpgp", "@"), + ARGPARSE_s_n (oCMS, "cms", "@"), + + ARGPARSE_group (302, N_("@\nTar options:\n ")), + + ARGPARSE_s_s (oDirectory, "directory", + N_("|DIRECTORY|extract files into DIRECTORY")), + ARGPARSE_s_s (oFilesFrom, "files-from", + N_("|FILE|get names to create from FILE")), + ARGPARSE_s_n (oNull, "null", N_("-T reads null-terminated names")), + + ARGPARSE_s_s (oTarArgs, "tar-args", "@"), + + ARGPARSE_end () +}; + + +/* The list of commands and options for tar that we understand. */ +static ARGPARSE_OPTS tar_opts[] = { + ARGPARSE_s_s (oDirectory, "directory", + N_("|DIRECTORY|extract files into DIRECTORY")), ARGPARSE_s_s (oFilesFrom, "files-from", N_("|FILE|get names to create from FILE")), ARGPARSE_s_n (oNull, "null", N_("-T reads null-terminated names")), - ARGPARSE_s_n (oOpenPGP, "openpgp", "@"), - ARGPARSE_s_n (oCMS, "cms", "@"), ARGPARSE_end () }; @@ -156,6 +178,105 @@ set_cmd (enum cmd_and_opt_values *ret_cmd, enum cmd_and_opt_values new_cmd) *ret_cmd = cmd; } + +/* Shell-like argument splitting. + + For compatibility with gpg-zip we accept arguments for GnuPG and + tar given as a string argument to '--gpg-args' and '--tar-args'. + gpg-zip was implemented as a Bourne Shell script, and therefore, we + need to split the string the same way the shell would. */ +static int +shell_parse_stringlist (const char *str, strlist_t *r_list) +{ + strlist_t list = NULL; + const char *s = str; + char quoted = 0; + char arg[1024]; + char *p = arg; +#define addchar(c) \ + do { if (p - arg + 2 < sizeof arg) *p++ = (c); else return 1; } while (0) +#define addargument() \ + do { \ + if (p > arg) \ + { \ + *p = 0; \ + append_to_strlist (&list, arg); \ + p = arg; \ + } \ + } while (0) + +#define unquoted 0 +#define singlequote '\'' +#define doublequote '"' + + for (; *s; s++) + { + switch (quoted) + { + case unquoted: + if (isspace (*s)) + addargument (); + else if (*s == singlequote || *s == doublequote) + quoted = *s; + else + addchar (*s); + break; + + case singlequote: + if (*s == singlequote) + quoted = unquoted; + else + addchar (*s); + break; + + case doublequote: + assert (s > str || !"cannot be quoted at first char"); + if (*s == doublequote && *(s - 1) != '\\') + quoted = unquoted; + else + addchar (*s); + break; + + default: + assert (! "reached"); + } + } + + /* Append the last argument. */ + addargument (); + +#undef doublequote +#undef singlequote +#undef unquoted +#undef addargument +#undef addchar + *r_list = list; + return 0; +} + + +/* Like shell_parse_stringlist, but returns an argv vector + instead of a strlist. */ +static int +shell_parse_argv (const char *s, int *r_argc, char ***r_argv) +{ + int i; + strlist_t list; + + if (shell_parse_stringlist (s, &list)) + return 1; + + *r_argc = strlist_length (list); + *r_argv = xtrycalloc (*r_argc, sizeof **r_argv); + if (*r_argv == NULL) + return 1; + + for (i = 0; list; i++) + (*r_argv)[i] = list->d, list = list->next; + return 0; +} + +/* Define Assuan hooks for NPTH. */ ASSUAN_SYSTEM_NPTH_IMPL; @@ -169,11 +290,11 @@ int null_names = 0; /* Command line parsing. */ static void -parse_arguments (ARGPARSE_ARGS *pargs) +parse_arguments (ARGPARSE_ARGS *pargs, ARGPARSE_OPTS *popts) { int no_more_options = 0; - while (!no_more_options && optfile_parse (NULL, NULL, NULL, pargs, opts)) + while (!no_more_options && optfile_parse (NULL, NULL, NULL, pargs, popts)) { switch (pargs->r_opt) { @@ -219,6 +340,27 @@ parse_arguments (ARGPARSE_ARGS *pargs) case oOpenPGP: /* Dummy option for now. */ break; case oCMS: /* Dummy option for now. */ break; + case oTarArgs:; + int tar_argc; + char **tar_argv; + + if (shell_parse_argv (pargs->r.ret_str, &tar_argc, &tar_argv)) + log_error ("failed to parse tar arguments '%s'\n", + pargs->r.ret_str); + else + { + ARGPARSE_ARGS tar_args; + tar_args.argc = &tar_argc; + tar_args.argv = &tar_argv; + tar_args.flags = ARGPARSE_FLAG_ARG0; + parse_arguments (&tar_args, tar_opts); + if (tar_args.err) + log_error ("unsupported tar arguments '%s'\n", + pargs->r.ret_str); + pargs->err = tar_args.err; + } + break; + default: pargs->err = 2; break; } } @@ -252,7 +394,7 @@ main (int argc, char **argv) pargs.argc = &argc; pargs.argv = &argv; pargs.flags = ARGPARSE_FLAG_KEEP; - parse_arguments (&pargs); + parse_arguments (&pargs, opts); if ((files_from && !null_names) || (!files_from && null_names)) log_error ("--files-from and --null may only be used in conjunction\n"); |