Date: Mon, 23 Oct 2017 16:54:31 +0000 (UTC) From: Ngie Cooper <ngie@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r324928 - head/lib/libugidfw Message-ID: <201710231654.v9NGsVcX053191@repo.freebsd.org>
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Author: ngie Date: Mon Oct 23 16:54:30 2017 New Revision: 324928 URL: https://svnweb.freebsd.org/changeset/base/324928 Log: Remove dead stores The return value of various snprintf calls was stored in `len` and not used in many functions. MFC after: 1 week Reported by: clang-scanbuild Modified: head/lib/libugidfw/ugidfw.c Modified: head/lib/libugidfw/ugidfw.c ============================================================================== --- head/lib/libugidfw/ugidfw.c Mon Oct 23 16:50:33 2017 (r324927) +++ head/lib/libugidfw/ugidfw.c Mon Oct 23 16:54:30 2017 (r324928) @@ -512,7 +512,6 @@ bsde_parse_uidrange(char *spec, uid_t *min, uid_t *max uid_t uid1, uid2; char *spec1, *spec2, *endp; unsigned long value; - size_t len; spec2 = spec; spec1 = strsep(&spec2, ":"); @@ -523,8 +522,7 @@ bsde_parse_uidrange(char *spec, uid_t *min, uid_t *max else { value = strtoul(spec1, &endp, 10); if (*endp != '\0') { - len = snprintf(errstr, buflen, - "invalid uid: '%s'", spec1); + snprintf(errstr, buflen, "invalid uid: '%s'", spec1); return (-1); } uid1 = value; @@ -541,8 +539,7 @@ bsde_parse_uidrange(char *spec, uid_t *min, uid_t *max else { value = strtoul(spec2, &endp, 10); if (*endp != '\0') { - len = snprintf(errstr, buflen, - "invalid uid: '%s'", spec2); + snprintf(errstr, buflen, "invalid uid: '%s'", spec2); return (-1); } uid2 = value; @@ -561,7 +558,6 @@ bsde_parse_gidrange(char *spec, gid_t *min, gid_t *max gid_t gid1, gid2; char *spec1, *spec2, *endp; unsigned long value; - size_t len; spec2 = spec; spec1 = strsep(&spec2, ":"); @@ -572,8 +568,7 @@ bsde_parse_gidrange(char *spec, gid_t *min, gid_t *max else { value = strtoul(spec1, &endp, 10); if (*endp != '\0') { - len = snprintf(errstr, buflen, - "invalid gid: '%s'", spec1); + snprintf(errstr, buflen, "invalid gid: '%s'", spec1); return (-1); } gid1 = value; @@ -590,8 +585,7 @@ bsde_parse_gidrange(char *spec, gid_t *min, gid_t *max else { value = strtoul(spec2, &endp, 10); if (*endp != '\0') { - len = snprintf(errstr, buflen, - "invalid gid: '%s'", spec2); + snprintf(errstr, buflen, "invalid gid: '%s'", spec2); return (-1); } gid2 = value; @@ -613,7 +607,6 @@ bsde_parse_subject(int argc, char *argv[], uid_t uid_min, uid_max; gid_t gid_min, gid_max; int jid = 0; - size_t len; long value; current = 0; @@ -630,11 +623,11 @@ bsde_parse_subject(int argc, char *argv[], while (current < argc) { if (strcmp(argv[current], "uid") == 0) { if (current + 2 > argc) { - len = snprintf(errstr, buflen, "uid short"); + snprintf(errstr, buflen, "uid short"); return (-1); } if (flags & MBS_UID_DEFINED) { - len = snprintf(errstr, buflen, "one uid only"); + snprintf(errstr, buflen, "one uid only"); return (-1); } if (bsde_parse_uidrange(argv[current+1], @@ -648,11 +641,11 @@ bsde_parse_subject(int argc, char *argv[], current += 2; } else if (strcmp(argv[current], "gid") == 0) { if (current + 2 > argc) { - len = snprintf(errstr, buflen, "gid short"); + snprintf(errstr, buflen, "gid short"); return (-1); } if (flags & MBS_GID_DEFINED) { - len = snprintf(errstr, buflen, "one gid only"); + snprintf(errstr, buflen, "one gid only"); return (-1); } if (bsde_parse_gidrange(argv[current+1], @@ -666,17 +659,17 @@ bsde_parse_subject(int argc, char *argv[], current += 2; } else if (strcmp(argv[current], "jailid") == 0) { if (current + 2 > argc) { - len = snprintf(errstr, buflen, "prison short"); + snprintf(errstr, buflen, "prison short"); return (-1); } if (flags & MBS_PRISON_DEFINED) { - len = snprintf(errstr, buflen, "one jail only"); + snprintf(errstr, buflen, "one jail only"); return (-1); } value = strtol(argv[current+1], &endp, 10); if (*endp != '\0') { - len = snprintf(errstr, buflen, - "invalid jid: '%s'", argv[current+1]); + snprintf(errstr, buflen, "invalid jid: '%s'", + argv[current+1]); return (-1); } jid = value; @@ -688,14 +681,13 @@ bsde_parse_subject(int argc, char *argv[], current += 2; } else if (strcmp(argv[current], "!") == 0) { if (nextnot) { - len = snprintf(errstr, buflen, - "double negative"); + snprintf(errstr, buflen, "double negative"); return (-1); } nextnot = 1; current += 1; } else { - len = snprintf(errstr, buflen, "'%s' not expected", + snprintf(errstr, buflen, "'%s' not expected", argv[current]); return (-1); } @@ -723,7 +715,6 @@ bsde_parse_subject(int argc, char *argv[], static int bsde_parse_type(char *spec, int *type, size_t buflen, char *errstr) { - size_t len; int i; *type = 0; @@ -755,10 +746,10 @@ bsde_parse_type(char *spec, int *type, size_t buflen, *type |= MBO_ALL_TYPE; break; default: - len = snprintf(errstr, buflen, "Unknown type code: %c", + snprintf(errstr, buflen, "Unknown type code: %c", spec[i]); return (-1); - } + } } return (0); @@ -767,11 +758,10 @@ bsde_parse_type(char *spec, int *type, size_t buflen, static int bsde_parse_fsid(char *spec, struct fsid *fsid, size_t buflen, char *errstr) { - size_t len; struct statfs buf; if (statfs(spec, &buf) < 0) { - len = snprintf(errstr, buflen, "Unable to get id for %s: %s", + snprintf(errstr, buflen, "Unable to get id for %s: %s", spec, strerror(errno)); return (-1); } @@ -791,7 +781,6 @@ bsde_parse_object(int argc, char *argv[], uid_t uid_min, uid_max; gid_t gid_min, gid_max; struct fsid fsid; - size_t len; current = 0; flags = 0; @@ -808,11 +797,11 @@ bsde_parse_object(int argc, char *argv[], while (current < argc) { if (strcmp(argv[current], "uid") == 0) { if (current + 2 > argc) { - len = snprintf(errstr, buflen, "uid short"); + snprintf(errstr, buflen, "uid short"); return (-1); } if (flags & MBO_UID_DEFINED) { - len = snprintf(errstr, buflen, "one uid only"); + snprintf(errstr, buflen, "one uid only"); return (-1); } if (bsde_parse_uidrange(argv[current+1], @@ -826,11 +815,11 @@ bsde_parse_object(int argc, char *argv[], current += 2; } else if (strcmp(argv[current], "gid") == 0) { if (current + 2 > argc) { - len = snprintf(errstr, buflen, "gid short"); + snprintf(errstr, buflen, "gid short"); return (-1); } if (flags & MBO_GID_DEFINED) { - len = snprintf(errstr, buflen, "one gid only"); + snprintf(errstr, buflen, "one gid only"); return (-1); } if (bsde_parse_gidrange(argv[current+1], @@ -844,11 +833,11 @@ bsde_parse_object(int argc, char *argv[], current += 2; } else if (strcmp(argv[current], "filesys") == 0) { if (current + 2 > argc) { - len = snprintf(errstr, buflen, "filesys short"); + snprintf(errstr, buflen, "filesys short"); return (-1); } if (flags & MBO_FSID_DEFINED) { - len = snprintf(errstr, buflen, "one fsid only"); + snprintf(errstr, buflen, "one fsid only"); return (-1); } if (bsde_parse_fsid(argv[current+1], &fsid, @@ -890,11 +879,11 @@ bsde_parse_object(int argc, char *argv[], current += 1; } else if (strcmp(argv[current], "type") == 0) { if (current + 2 > argc) { - len = snprintf(errstr, buflen, "type short"); + snprintf(errstr, buflen, "type short"); return (-1); } if (flags & MBO_TYPE_DEFINED) { - len = snprintf(errstr, buflen, "one type only"); + snprintf(errstr, buflen, "one type only"); return (-1); } if (bsde_parse_type(argv[current+1], &type, @@ -908,14 +897,14 @@ bsde_parse_object(int argc, char *argv[], current += 2; } else if (strcmp(argv[current], "!") == 0) { if (nextnot) { - len = snprintf(errstr, buflen, + snprintf(errstr, buflen, "double negative'"); return (-1); } nextnot = 1; current += 1; } else { - len = snprintf(errstr, buflen, "'%s' not expected", + snprintf(errstr, buflen, "'%s' not expected", argv[current]); return (-1); } @@ -946,16 +935,15 @@ int bsde_parse_mode(int argc, char *argv[], mode_t *mode, size_t buflen, char *errstr) { - size_t len; int i; if (argc == 0) { - len = snprintf(errstr, buflen, "mode expects mode value"); + snprintf(errstr, buflen, "mode expects mode value"); return (-1); } if (argc != 1) { - len = snprintf(errstr, buflen, "'%s' unexpected", argv[1]); + snprintf(errstr, buflen, "'%s' unexpected", argv[1]); return (-1); } @@ -981,7 +969,7 @@ bsde_parse_mode(int argc, char *argv[], mode_t *mode, /* ignore */ break; default: - len = snprintf(errstr, buflen, "Unknown mode letter: %c", + snprintf(errstr, buflen, "Unknown mode letter: %c", argv[0][i]); return (-1); } @@ -998,17 +986,16 @@ bsde_parse_rule(int argc, char *argv[], struct mac_bsd int object, object_elements, object_elements_length; int mode, mode_elements, mode_elements_length; int error, i; - size_t len; bzero(rule, sizeof(*rule)); if (argc < 1) { - len = snprintf(errstr, buflen, "Rule must begin with subject"); + snprintf(errstr, buflen, "Rule must begin with subject"); return (-1); } if (strcmp(argv[0], "subject") != 0) { - len = snprintf(errstr, buflen, "Rule must begin with subject"); + snprintf(errstr, buflen, "Rule must begin with subject"); return (-1); } subject = 0; @@ -1022,7 +1009,7 @@ bsde_parse_rule(int argc, char *argv[], struct mac_bsd object = i; if (object == -1) { - len = snprintf(errstr, buflen, "Rule must contain an object"); + snprintf(errstr, buflen, "Rule must contain an object"); return (-1); } @@ -1033,7 +1020,7 @@ bsde_parse_rule(int argc, char *argv[], struct mac_bsd mode = i; if (mode == -1) { - len = snprintf(errstr, buflen, "Rule must contain mode"); + snprintf(errstr, buflen, "Rule must contain mode"); return (-1); } @@ -1112,12 +1099,12 @@ bsde_check_version(size_t buflen, char *errstr) len = sizeof(version); error = sysctlbyname(MIB ".rule_version", &version, &len, NULL, 0); if (error) { - len = snprintf(errstr, buflen, "version check failed: %s", + snprintf(errstr, buflen, "version check failed: %s", strerror(errno)); return (-1); } if (version != MB_VERSION) { - len = snprintf(errstr, buflen, "module v%d != library v%d", + snprintf(errstr, buflen, "module v%d != library v%d", version, MB_VERSION); return (-1); } @@ -1134,11 +1121,11 @@ bsde_get_rule_count(size_t buflen, char *errstr) len = sizeof(rule_count); error = sysctlbyname(MIB ".rule_count", &rule_count, &len, NULL, 0); if (error) { - len = snprintf(errstr, buflen, "%s", strerror(errno)); + snprintf(errstr, buflen, "%s", strerror(errno)); return (-1); } if (len != sizeof(rule_count)) { - len = snprintf(errstr, buflen, "Data error in %s.rule_count", + snprintf(errstr, buflen, "Data error in %s.rule_count", MIB); return (-1); } @@ -1156,12 +1143,11 @@ bsde_get_rule_slots(size_t buflen, char *errstr) len = sizeof(rule_slots); error = sysctlbyname(MIB ".rule_slots", &rule_slots, &len, NULL, 0); if (error) { - len = snprintf(errstr, buflen, "%s", strerror(errno)); + snprintf(errstr, buflen, "%s", strerror(errno)); return (-1); } if (len != sizeof(rule_slots)) { - len = snprintf(errstr, buflen, "Data error in %s.rule_slots", - MIB); + snprintf(errstr, buflen, "Data error in %s.rule_slots", MIB); return (-1); } @@ -1187,7 +1173,7 @@ bsde_get_rule(int rulenum, struct mac_bsdextended_rule len = 10; error = bsde_get_mib(MIB ".rules", name, &len); if (error) { - len = snprintf(errstr, errlen, "%s: %s", MIB ".rules", + snprintf(errstr, errlen, "%s: %s", MIB ".rules", strerror(errno)); return (-1); } @@ -1199,11 +1185,11 @@ bsde_get_rule(int rulenum, struct mac_bsdextended_rule if (error == -1 && errno == ENOENT) return (-2); if (error) { - len = snprintf(errstr, errlen, "%s.%d: %s", MIB ".rules", + snprintf(errstr, errlen, "%s.%d: %s", MIB ".rules", rulenum, strerror(errno)); return (-1); } else if (size != sizeof(*rule)) { - len = snprintf(errstr, errlen, "Data error in %s.%d: %s", + snprintf(errstr, errlen, "Data error in %s.%d: %s", MIB ".rules", rulenum, strerror(errno)); return (-1); } @@ -1225,7 +1211,7 @@ bsde_delete_rule(int rulenum, size_t buflen, char *err len = 10; error = bsde_get_mib(MIB ".rules", name, &len); if (error) { - len = snprintf(errstr, buflen, "%s: %s", MIB ".rules", + snprintf(errstr, buflen, "%s: %s", MIB ".rules", strerror(errno)); return (-1); } @@ -1235,7 +1221,7 @@ bsde_delete_rule(int rulenum, size_t buflen, char *err error = sysctl(name, len, NULL, NULL, &rule, 0); if (error) { - len = snprintf(errstr, buflen, "%s.%d: %s", MIB ".rules", + snprintf(errstr, buflen, "%s.%d: %s", MIB ".rules", rulenum, strerror(errno)); return (-1); } @@ -1257,7 +1243,7 @@ bsde_set_rule(int rulenum, struct mac_bsdextended_rule len = 10; error = bsde_get_mib(MIB ".rules", name, &len); if (error) { - len = snprintf(errstr, buflen, "%s: %s", MIB ".rules", + snprintf(errstr, buflen, "%s: %s", MIB ".rules", strerror(errno)); return (-1); } @@ -1267,7 +1253,7 @@ bsde_set_rule(int rulenum, struct mac_bsdextended_rule error = sysctl(name, len, NULL, NULL, rule, sizeof(*rule)); if (error) { - len = snprintf(errstr, buflen, "%s.%d: %s", MIB ".rules", + snprintf(errstr, buflen, "%s.%d: %s", MIB ".rules", rulenum, strerror(errno)); return (-1); } @@ -1290,14 +1276,14 @@ bsde_add_rule(int *rulenum, struct mac_bsdextended_rul len = 10; error = bsde_get_mib(MIB ".rules", name, &len); if (error) { - len = snprintf(errstr, buflen, "%s: %s", MIB ".rules", + snprintf(errstr, buflen, "%s: %s", MIB ".rules", strerror(errno)); return (-1); } rule_slots = bsde_get_rule_slots(BUFSIZ, charstr); if (rule_slots == -1) { - len = snprintf(errstr, buflen, "unable to get rule slots: %s", + snprintf(errstr, buflen, "unable to get rule slots: %s", strerror(errno)); return (-1); } @@ -1307,7 +1293,7 @@ bsde_add_rule(int *rulenum, struct mac_bsdextended_rul error = sysctl(name, len, NULL, NULL, rule, sizeof(*rule)); if (error) { - len = snprintf(errstr, buflen, "%s.%d: %s", MIB ".rules", + snprintf(errstr, buflen, "%s.%d: %s", MIB ".rules", rule_slots, strerror(errno)); return (-1); }
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