From: Tom Gundersen Date: Tue, 9 Sep 2014 21:12:14 +0000 (+0200) Subject: libudev: drop util_lookup_{user,group} X-Git-Tag: v217~565 X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=commitdiff_plain;h=23bf8dd7d5ce1e2a52f28d5d242109ddb668b3fb libudev: drop util_lookup_{user,group} Use shared versions instead. Difference is with overwriting of repeated user/group name, and lack of logging. --- diff --git a/src/libudev/libudev-private.h b/src/libudev/libudev-private.h index 35ea7ba44..1c060d95a 100644 --- a/src/libudev/libudev-private.h +++ b/src/libudev/libudev-private.h @@ -168,8 +168,6 @@ uint64_t util_string_bloom64(const char *str); /* libudev-util-private.c */ int util_delete_path(struct udev *udev, const char *path); -uid_t util_lookup_user(struct udev *udev, const char *user); -gid_t util_lookup_group(struct udev *udev, const char *group); int util_resolve_subsys_kernel(struct udev *udev, const char *string, char *result, size_t maxsize, int read_value); #endif diff --git a/src/libudev/libudev-util.c b/src/libudev/libudev-util.c index 9e19e3140..3bc9c67f3 100644 --- a/src/libudev/libudev-util.c +++ b/src/libudev/libudev-util.c @@ -77,70 +77,6 @@ int util_delete_path(struct udev *udev, const char *path) return err; } -uid_t util_lookup_user(struct udev *udev, const char *user) -{ - char *endptr; - struct passwd pwbuf; - struct passwd *pw; - uid_t uid; - size_t buflen = sysconf(_SC_GETPW_R_SIZE_MAX); - char *buf = alloca(buflen); - - if (streq(user, "root")) - return 0; - uid = strtoul(user, &endptr, 10); - if (endptr[0] == '\0') - return uid; - - errno = getpwnam_r(user, &pwbuf, buf, buflen, &pw); - if (pw != NULL) - return pw->pw_uid; - if (errno == 0 || errno == ENOENT || errno == ESRCH) - udev_err(udev, "specified user '%s' unknown\n", user); - else - udev_err(udev, "error resolving user '%s': %m\n", user); - return 0; -} - -gid_t util_lookup_group(struct udev *udev, const char *group) -{ - char *endptr; - struct group grbuf; - struct group *gr; - gid_t gid = 0; - size_t buflen = sysconf(_SC_GETPW_R_SIZE_MAX); - char *buf = NULL; - - if (streq(group, "root")) - return 0; - gid = strtoul(group, &endptr, 10); - if (endptr[0] == '\0') - return gid; - gid = 0; - for (;;) { - char *newbuf; - - newbuf = realloc(buf, buflen); - if (!newbuf) - break; - buf = newbuf; - errno = getgrnam_r(group, &grbuf, buf, buflen, &gr); - if (gr != NULL) { - gid = gr->gr_gid; - } else if (errno == ERANGE) { - buflen *= 2; - continue; - } else if (errno == 0 || errno == ENOENT || errno == ESRCH) { - udev_err(udev, "specified group '%s' unknown\n", group); - } else { - udev_err(udev, "error resolving group '%s': %m\n", group); - } - break; - } - free(buf); - return gid; -} - /* handle "[/]" format */ int util_resolve_subsys_kernel(struct udev *udev, const char *string, char *result, size_t maxsize, int read_value) diff --git a/src/udev/udev-rules.c b/src/udev/udev-rules.c index db95442fd..ce4d173ee 100644 --- a/src/udev/udev-rules.c +++ b/src/udev/udev-rules.c @@ -459,8 +459,9 @@ static int add_token(struct udev_rules *rules, struct token *token) { static uid_t add_uid(struct udev_rules *rules, const char *owner) { unsigned int i; - uid_t uid; + uid_t uid = 0; unsigned int off; + int r; /* lookup, if we know it already */ for (i = 0; i < rules->uids_cur; i++) { @@ -470,7 +471,13 @@ static uid_t add_uid(struct udev_rules *rules, const char *owner) { return uid; } } - uid = util_lookup_user(rules->udev, owner); + r = get_user_creds(&owner, &uid, NULL, NULL, NULL); + if (r < 0) { + if (r == -ENOENT || r == -ESRCH) + udev_err(rules->udev, "specified user '%s' unknown\n", owner); + else + udev_err(rules->udev, "error resolving user '%s': %s\n", owner, strerror(-r)); + } /* grow buffer if needed */ if (rules->uids_cur+1 >= rules->uids_max) { @@ -499,8 +506,9 @@ static uid_t add_uid(struct udev_rules *rules, const char *owner) { static gid_t add_gid(struct udev_rules *rules, const char *group) { unsigned int i; - gid_t gid; + gid_t gid = 0; unsigned int off; + int r; /* lookup, if we know it already */ for (i = 0; i < rules->gids_cur; i++) { @@ -510,7 +518,13 @@ static gid_t add_gid(struct udev_rules *rules, const char *group) { return gid; } } - gid = util_lookup_group(rules->udev, group); + r = get_group_creds(&group, &gid); + if (r < 0) { + if (r == -ENOENT || r == -ESRCH) + udev_err(rules->udev, "specified group '%s' unknown\n", group); + else + udev_err(rules->udev, "error resolving group '%s': %s\n", group, strerror(-r)); + } /* grow buffer if needed */ if (rules->gids_cur+1 >= rules->gids_max) { @@ -2241,6 +2255,8 @@ int udev_rules_apply_to_event(struct udev_rules *rules, break; case TK_A_OWNER: { char owner[UTIL_NAME_SIZE]; + const char *ow = owner; + int r; if (event->owner_final) break; @@ -2248,7 +2264,15 @@ int udev_rules_apply_to_event(struct udev_rules *rules, event->owner_final = true; udev_event_apply_format(event, rules_str(rules, cur->key.value_off), owner, sizeof(owner)); event->owner_set = true; - event->uid = util_lookup_user(event->udev, owner); + r = get_user_creds(&ow, &event->uid, NULL, NULL, NULL); + if (r < 0) { + if (r == -ENOENT || r == -ESRCH) + udev_err(event->udev, "specified user '%s' unknown\n", owner); + else + udev_err(event->udev, "error resolving user '%s': %s\n", owner, strerror(-r)); + + event->uid = 0; + } log_debug("OWNER %u %s:%u", event->uid, rules_str(rules, rule->rule.filename_off), @@ -2257,6 +2281,8 @@ int udev_rules_apply_to_event(struct udev_rules *rules, } case TK_A_GROUP: { char group[UTIL_NAME_SIZE]; + const char *gr = group; + int r; if (event->group_final) break; @@ -2264,7 +2290,15 @@ int udev_rules_apply_to_event(struct udev_rules *rules, event->group_final = true; udev_event_apply_format(event, rules_str(rules, cur->key.value_off), group, sizeof(group)); event->group_set = true; - event->gid = util_lookup_group(event->udev, group); + r = get_group_creds(&gr, &event->gid); + if (r < 0) { + if (r == -ENOENT || r == -ESRCH) + udev_err(event->udev, "specified group '%s' unknown\n", group); + else + udev_err(event->udev, "error resolving group '%s': %s\n", group, strerror(-r)); + + event->gid = 0; + } log_debug("GROUP %u %s:%u", event->gid, rules_str(rules, rule->rule.filename_off),