diff options
| -rw-r--r-- | src/basic/parse-util.c | 100 |
1 files changed, 66 insertions, 34 deletions
diff --git a/src/basic/parse-util.c b/src/basic/parse-util.c index b6358c459a..151067e916 100644 --- a/src/basic/parse-util.c +++ b/src/basic/parse-util.c @@ -67,11 +67,14 @@ int parse_mode(const char *s, mode_t *ret) { assert(s); assert(ret); + s += strspn(s, WHITESPACE); + if (s[0] == '-') + return -ERANGE; + errno = 0; l = strtol(s, &x, 8); if (errno != 0) return -errno; - if (!x || x == s || *x) return -EINVAL; if (l < 0 || l > 07777) @@ -162,15 +165,15 @@ int parse_size(const char *t, uint64_t base, uint64_t *size) { unsigned i; p += strspn(p, WHITESPACE); - if (*p == '-') - return -ERANGE; errno = 0; l = strtoull(p, &e, 10); - if (errno > 0) + if (errno != 0) return -errno; if (e == p) return -EINVAL; + if (*p == '-') + return -ERANGE; if (*e == '.') { e++; @@ -181,7 +184,7 @@ int parse_size(const char *t, uint64_t base, uint64_t *size) { char *e2; l2 = strtoull(e, &e2, 10); - if (errno > 0) + if (errno != 0) return -errno; /* Ignore failure. E.g. 10.M is valid */ @@ -307,12 +310,24 @@ int safe_atou(const char *s, unsigned *ret_u) { assert(s); assert(ret_u); - errno = 0; - l = strtoul(s, &x, 0); + /* strtoul() is happy to parse negative values, and silently + * converts them to unsigned values without generating an + * error. We want a clean error, hence let's look for the "-" + * prefix on our own, and generate an error. But let's do so + * only after strtoul() validated that the string is clean + * otherwise, so that we return EINVAL preferably over + * ERANGE. */ - if (!x || x == s || *x || errno) - return errno > 0 ? -errno : -EINVAL; + s += strspn(s, WHITESPACE); + errno = 0; + l = strtoul(s, &x, 0); + if (errno != 0) + return -errno; + if (!x || x == s || *x) + return -EINVAL; + if (s[0] == '-') + return -ERANGE; if ((unsigned long) (unsigned) l != l) return -ERANGE; @@ -329,10 +344,10 @@ int safe_atoi(const char *s, int *ret_i) { errno = 0; l = strtol(s, &x, 0); - - if (!x || x == s || *x || errno) - return errno > 0 ? -errno : -EINVAL; - + if (errno != 0) + return -errno; + if (!x || x == s || *x) + return -EINVAL; if ((long) (int) l != l) return -ERANGE; @@ -347,11 +362,16 @@ int safe_atollu(const char *s, long long unsigned *ret_llu) { assert(s); assert(ret_llu); + s += strspn(s, WHITESPACE); + errno = 0; l = strtoull(s, &x, 0); - - if (!x || x == s || *x || errno) - return errno ? -errno : -EINVAL; + if (errno != 0) + return -errno; + if (!x || x == s || *x) + return -EINVAL; + if (*s == '-') + return -ERANGE; *ret_llu = l; return 0; @@ -366,9 +386,10 @@ int safe_atolli(const char *s, long long int *ret_lli) { errno = 0; l = strtoll(s, &x, 0); - - if (!x || x == s || *x || errno) - return errno ? -errno : -EINVAL; + if (errno != 0) + return -errno; + if (!x || x == s || *x) + return -EINVAL; *ret_lli = l; return 0; @@ -381,12 +402,16 @@ int safe_atou8(const char *s, uint8_t *ret) { assert(s); assert(ret); + s += strspn(s, WHITESPACE); + errno = 0; l = strtoul(s, &x, 0); - - if (!x || x == s || *x || errno) - return errno > 0 ? -errno : -EINVAL; - + if (errno != 0) + return -errno; + if (!x || x == s || *x) + return -EINVAL; + if (s[0] == '-') + return -ERANGE; if ((unsigned long) (uint8_t) l != l) return -ERANGE; @@ -401,12 +426,16 @@ int safe_atou16(const char *s, uint16_t *ret) { assert(s); assert(ret); + s += strspn(s, WHITESPACE); + errno = 0; l = strtoul(s, &x, 0); - - if (!x || x == s || *x || errno) - return errno > 0 ? -errno : -EINVAL; - + if (errno != 0) + return -errno; + if (!x || x == s || *x) + return -EINVAL; + if (s[0] == '-') + return -ERANGE; if ((unsigned long) (uint16_t) l != l) return -ERANGE; @@ -423,10 +452,10 @@ int safe_atoi16(const char *s, int16_t *ret) { errno = 0; l = strtol(s, &x, 0); - - if (!x || x == s || *x || errno) - return errno > 0 ? -errno : -EINVAL; - + if (errno != 0) + return -errno; + if (!x || x == s || *x) + return -EINVAL; if ((long) (int16_t) l != l) return -ERANGE; @@ -448,10 +477,13 @@ int safe_atod(const char *s, double *ret_d) { errno = 0; d = strtod_l(s, &x, loc); - - if (!x || x == s || *x || errno) { + if (errno != 0) { freelocale(loc); - return errno ? -errno : -EINVAL; + return -errno; + } + if (!x || x == s || *x) { + freelocale(loc); + return -EINVAL; } freelocale(loc); |