diff options
Diffstat (limited to 'selinux/chcon.c')
| -rw-r--r-- | selinux/chcon.c | 175 |
1 files changed, 175 insertions, 0 deletions
diff --git a/selinux/chcon.c b/selinux/chcon.c new file mode 100644 index 0000000..d7ff408 --- /dev/null +++ b/selinux/chcon.c @@ -0,0 +1,175 @@ +/* + * chcon -- change security context, based on coreutils-5.97-13 + * + * Port to busybox: KaiGai Kohei <kaigai@kaigai.gr.jp> + * + * Copyright (C) 2006 - 2007 KaiGai Kohei <kaigai@kaigai.gr.jp> + */ +#include "busybox.h" +#include <getopt.h> +#include <selinux/context.h> + +#define OPT_RECURSIVE (1<<0) /* 'R' */ +#define OPT_CHANHES (1<<1) /* 'c' */ +#define OPT_NODEREFERENCE (1<<2) /* 'h' */ +#define OPT_QUIET (1<<3) /* 'f' */ +#define OPT_USER (1<<4) /* 'u' */ +#define OPT_ROLE (1<<5) /* 'r' */ +#define OPT_TYPE (1<<6) /* 't' */ +#define OPT_RANGE (1<<7) /* 'l' */ +#define OPT_VERBOSE (1<<8) /* 'v' */ +#define OPT_REFERENCE ((1<<9) * ENABLE_FEATURE_CHCON_LONG_OPTIONS) +#define OPT_COMPONENT_SPECIFIED (OPT_USER | OPT_ROLE | OPT_TYPE | OPT_RANGE) + +static char *user = NULL; +static char *role = NULL; +static char *type = NULL; +static char *range = NULL; +static char *specified_context = NULL; + +static int change_filedir_context(const char *fname, struct stat *stbuf, void *userData, int depth) +{ + context_t context = NULL; + security_context_t file_context = NULL; + security_context_t context_string; + int rc = FALSE; + int status = 0; + + if (option_mask32 & OPT_NODEREFERENCE) { + status = lgetfilecon(fname, &file_context); + } else { + status = getfilecon(fname, &file_context); + } + if (status < 0 && errno != ENODATA) { + if ((option_mask32 & OPT_QUIET) == 0) + bb_error_msg("cannot obtain security context: %s", fname); + goto skip; + } + + if (file_context == NULL && specified_context == NULL) { + bb_error_msg("cannot apply partial context to unlabeled file %s", fname); + goto skip; + } + + if (specified_context == NULL) { + context = set_security_context_component(file_context, + user, role, type, range); + if (!context) { + bb_error_msg("cannot compute security context from %s", file_context); + goto skip; + } + } else { + context = context_new(specified_context); + if (!context) { + bb_error_msg("invalid context: %s", specified_context); + goto skip; + } + } + + context_string = context_str(context); + if (!context_string) { + bb_error_msg("cannot obtain security context in text expression"); + goto skip; + } + + if (file_context == NULL || strcmp(context_string, file_context) != 0) { + int fail; + + if (option_mask32 & OPT_NODEREFERENCE) { + fail = lsetfilecon(fname, context_string); + } else { + fail = setfilecon(fname, context_string); + } + if ((option_mask32 & OPT_VERBOSE) || ((option_mask32 & OPT_CHANHES) && !fail)) { + printf(!fail + ? "context of %s changed to %s\n" + : "failed to change context of %s to %s\n", + fname, context_string); + } + if (!fail) { + rc = TRUE; + } else if ((option_mask32 & OPT_QUIET) == 0) { + bb_error_msg("failed to change context of %s to %s", + fname, context_string); + } + } else if (option_mask32 & OPT_VERBOSE) { + printf("context of %s retained as %s\n", fname, context_string); + rc = TRUE; + } +skip: + /* FIXME: aren't these work ok on NULL ptr? Remove if() then */ + if (context) + context_free(context); + if (file_context) + freecon(file_context); + + return rc; +} + +#if ENABLE_FEATURE_CHCON_LONG_OPTIONS +static struct option chcon_options[] = { + { "recursive", 0, NULL, 'R' }, + { "changes", 0, NULL, 'c' }, + { "no-dereference", 0, NULL, 'h' }, + { "silent", 0, NULL, 'f' }, + { "quiet", 0, NULL, 'f' }, + { "user", 1, NULL, 'u' }, + { "role", 1, NULL, 'r' }, + { "type", 1, NULL, 't' }, + { "range", 1, NULL, 'l' }, + { "verbose", 0, NULL, 'v' }, + { "reference", 1, NULL, 0xff }, /* no short option */ + { NULL, 0, NULL, 0 }, +}; +#endif + +int chcon_main(int argc, char *argv[]); +int chcon_main(int argc, char *argv[]) +{ + char *reference_file; + char *fname; + int i, errors = 0; + +#if ENABLE_FEATURE_CHCON_LONG_OPTIONS + applet_long_options = chcon_options; +#endif + opt_complementary = "-1" /* at least 1 param */ + ":?:f--v:v--f" /* 'verbose' and 'quiet' are exclusive */ + ":\xff--urtl:u--\xff:r--\xff:t--\xff:l--\xff"; + getopt32(argc, argv, "Rchf:u:r:t:l:v", + &user, &role, &type, &range, &reference_file); + argv += optind; + +#if ENABLE_FEATURE_CHCON_LONG_OPTIONS + if (option_mask32 & OPT_REFERENCE) { + /* FIXME: lgetfilecon() should be used when '-h' is specified. + But current implementation follows the original one. */ + if (getfilecon(reference_file, &specified_context) < 0) + bb_perror_msg_and_die("getfilecon('%s') failed", reference_file); + } else +#endif + if ((option_mask32 & OPT_COMPONENT_SPECIFIED) == 0) { + specified_context = *argv++; + /* specified_context is never NULL - + * "-1" in opt_complementary prevents this. */ + if (!argv[0]) + bb_error_msg_and_die("too few arguments"); + } + + for (i = 0; (fname = argv[i]) != NULL; i++) { + int fname_len = strlen(fname); + while (fname_len > 1 && fname[fname_len - 1] == '/') + fname_len--; + fname[fname_len] = '\0'; + + if (recursive_action(fname, + option_mask32 & OPT_RECURSIVE, + FALSE, /* followLinks */ + FALSE, /* depthFirst */ + change_filedir_context, + change_filedir_context, + NULL, 0) != TRUE) + errors = 1; + } + return errors; +} |