libmount: add --pass-fd to samples/mount
Signed-off-by: Karel Zak <kzak@redhat.com>
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1a7a421ed7
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dbae36fe40
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@ -5,6 +5,10 @@ AM_LDFLAGS += $(ul_libmount_la)
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noinst_PROGRAMS = mount umount
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mount_SOURCES = mount.c $(top_srcdir)/lib/env.c
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mount_SOURCES = mount.c \
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$(top_srcdir)/lib/env.c \
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$(top_srcdir)/lib/xgetpass.c \
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$(top_srcdir)/lib/strutils.c
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umount_SOURCES = umount.c $(top_srcdir)/lib/env.c
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@ -26,6 +26,7 @@
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#include <getopt.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/mman.h>
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#include <libmount.h>
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@ -33,12 +34,12 @@
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#include "c.h"
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#include "env.h"
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#include "optutils.h"
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#include "strutils.h"
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#include "xgetpass.h"
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/*** TODO: DOCS:
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*
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* -p, --pass-fd is unsupported
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* --guess-fstype is unsupported
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* -c = --no-canonicalize
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*/
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/* exit status */
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@ -51,6 +52,8 @@
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#define EX_FAIL 32 /* mount failure */
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#define EX_SOMEOK 64 /* some mount succeeded */
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static int passfd = -1;
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static void __attribute__((__noreturn__)) exit_non_root(const char *option)
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{
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const uid_t ruid = getuid();
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@ -90,6 +93,31 @@ static int table_parser_errcb(struct libmnt_table *tb __attribute__((__unused__)
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return 0;
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}
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static char *encrypt_pass_get(struct libmnt_context *cxt)
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{
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if (!cxt)
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return 0;
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#ifdef MCL_FUTURE
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if (mlockall(MCL_CURRENT | MCL_FUTURE)) {
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warn(_("couldn't lock into memory"));
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return NULL;
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}
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#endif
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return xgetpass(passfd, _("Password: "));
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}
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static void encrypt_pass_release(struct libmnt_context *cxt, char *pwd)
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{
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char *p = pwd;
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while (p && *p)
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*p++ = '\0';
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free(pwd);
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munlockall();
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}
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static void print_all(struct libmnt_context *cxt, char *pattern, int show_label)
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{
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struct libmnt_table *tb;
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@ -219,6 +247,7 @@ static void __attribute__((__noreturn__)) usage(FILE *out)
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fprintf(out, _(
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" -o, --options <list> comma-separated list of mount options\n"
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" -O, --test-opts <list> limit the set of filesystems (use with -a)\n"
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" -p, --pass-fd <num> read the passphrase from file descriptor\n"
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" -r, --read-only mount the filesystem read-only (same as -o ro)\n"
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" -t, --types <list> limit the set of filesystem types\n"));
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fprintf(out, _(
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@ -295,6 +324,7 @@ int main(int argc, char **argv)
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{ "rw", 0, 0, 'w' },
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{ "options", 1, 0, 'o' },
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{ "test-opts", 1, 0, 'O' },
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{ "pass-fd", 1, 0, 'p' },
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{ "types", 1, 0, 't' },
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{ "uuid", 1, 0, 'U' },
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{ "label", 1, 0, 'L'},
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@ -327,11 +357,11 @@ int main(int argc, char **argv)
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mnt_context_set_tables_errcb(cxt, table_parser_errcb);
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while ((c = getopt_long(argc, argv, "aBcfFhilL:Mno:O:rRsU:vVwt:",
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while ((c = getopt_long(argc, argv, "aBcfFhilL:Mno:O:p:rRsU:vVwt:",
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longopts, NULL)) != -1) {
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/* only few options are allowed for non-root users */
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if (mnt_context_is_restricted(cxt) && !strchr("hlLUVv", c))
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if (mnt_context_is_restricted(cxt) && !strchr("hlLUVvp", c))
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exit_non_root(option_to_longopt(c, longopts));
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switch(c) {
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@ -378,6 +408,10 @@ int main(int argc, char **argv)
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if (mnt_context_set_options_pattern(cxt, optarg))
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err(EX_SYSERR, _("failed to set options pattern"));
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break;
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case 'p':
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passfd = strtol_or_err(optarg,
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_("invalid passphrase file descriptor"));
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break;
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case 'L':
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case 'U':
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if (source)
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@ -454,6 +488,8 @@ int main(int argc, char **argv)
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else if (types)
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mnt_context_set_fstype(cxt, types);
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mnt_context_set_passwd_cb(cxt, encrypt_pass_get, encrypt_pass_release);
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if (all) {
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/*
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* A) Mount all
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