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-rw-r--r--doc/gpgsm.texi11
-rw-r--r--sm/gpgsm.c13
2 files changed, 23 insertions, 1 deletions
diff --git a/doc/gpgsm.texi b/doc/gpgsm.texi
index 0579be3ba..516213841 100644
--- a/doc/gpgsm.texi
+++ b/doc/gpgsm.texi
@@ -675,6 +675,17 @@ interoperability problems.
@table @gnupgtabopt
+@item --chuid @var{uid}
+@opindex chuid
+Change the current user to @var{uid} which may either be a number or a
+name. This can be used from the root account to run gpgsm for
+another user. If @var{uid} is not the current UID a standard PATH is
+set and the envvar GNUPGHOME is unset. To override the latter the
+option @option{--homedir} can be used. This option has only an effect
+when used on the command line. This option has currently no effect at
+all on Windows.
+
+
@item --extra-digest-algo @var{name}
@opindex extra-digest-algo
Sometimes signatures are broken in that they announce a different digest
diff --git a/sm/gpgsm.c b/sm/gpgsm.c
index 377cb1191..3b41fe3b2 100644
--- a/sm/gpgsm.c
+++ b/sm/gpgsm.c
@@ -200,6 +200,7 @@ enum cmd_and_opt_values {
oIgnoreCertExtension,
oAuthenticode,
oAttribute,
+ oChUid,
oNoAutostart
};
@@ -426,6 +427,7 @@ static gpgrt_opt_t opts[] = {
ARGPARSE_s_s (oLCctype, "lc-ctype", "@"),
ARGPARSE_s_s (oLCmessages, "lc-messages", "@"),
ARGPARSE_s_s (oXauthority, "xauthority", "@"),
+ ARGPARSE_s_s (oChUid, "chuid", "@"),
ARGPARSE_header (NULL, ""), /* Stop the header group. */
@@ -990,6 +992,7 @@ main ( int argc, char **argv)
estream_t htmlauditfp = NULL;
struct assuan_malloc_hooks malloc_hooks;
int pwfd = -1;
+ const char *changeuser = NULL;
/*mtrace();*/
early_system_init ();
@@ -1062,6 +1065,10 @@ main ( int argc, char **argv)
gnupg_set_homedir (pargs.r.ret_str);
break;
+ case oChUid:
+ changeuser = pargs.r.ret_str;
+ break;
+
case aCallProtectTool:
/* Make sure that --version and --help are passed to the
* protect-tool. */
@@ -1078,7 +1085,7 @@ main ( int argc, char **argv)
/*
Now we are now working under our real uid
- */
+ */
ksba_set_malloc_hooks (gcry_malloc, gcry_realloc, gcry_free );
@@ -1096,6 +1103,9 @@ main ( int argc, char **argv)
ctrl.status_fd = -1; /* No status output. */
ctrl.autodetect_encoding = 1;
+ if (changeuser && gnupg_chuid (changeuser, 0))
+ log_inc_errorcount (); /* Force later termination. */
+
/* Set the default policy file */
opt.policy_file = make_filename (gnupg_homedir (), "policies.txt", NULL);
@@ -1383,6 +1393,7 @@ main ( int argc, char **argv)
break;
case oHomedir: gnupg_set_homedir (pargs.r.ret_str); break;
+ case oChUid: break; /* Command line only (see above). */
case oAgentProgram: opt.agent_program = pargs.r.ret_str; break;
case oDisplay: