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Diffstat (limited to '')
| -rw-r--r-- | lib/util/strtoid.c | 176 |
1 files changed, 176 insertions, 0 deletions
diff --git a/lib/util/strtoid.c b/lib/util/strtoid.c new file mode 100644 index 0000000..2339a88 --- /dev/null +++ b/lib/util/strtoid.c @@ -0,0 +1,176 @@ +/* + * Copyright (c) 2013-2016 Todd C. Miller <Todd.Miller@sudo.ws> + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +/* + * This is an open source non-commercial project. Dear PVS-Studio, please check it. + * PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com + */ + +#include <config.h> + +#include <sys/types.h> + +#include <stdio.h> +#include <stdlib.h> +#if defined(HAVE_STDINT_H) +# include <stdint.h> +#elif defined(HAVE_INTTYPES_H) +# include <inttypes.h> +#endif +#ifdef HAVE_STDBOOL_H +# include <stdbool.h> +#else +# include "compat/stdbool.h" +#endif +#include <ctype.h> +#include <errno.h> +#include <limits.h> + +#define DEFAULT_TEXT_DOMAIN "sudo" +#include "sudo_gettext.h" /* must be included before sudo_compat.h */ + +#include "sudo_compat.h" +#include "sudo_debug.h" +#include "sudo_util.h" + +/* + * Parse a uid/gid in string form. + * If sep is non-NULL, it contains valid separator characters (e.g. comma, space) + * If endp is non-NULL it is set to the next char after the ID. + * On success, returns the parsed ID and clears errstr. + * On error, returns 0 and sets errstr. + */ +#if SIZEOF_ID_T == SIZEOF_LONG_LONG +id_t +sudo_strtoid_v1(const char *p, const char *sep, char **endp, const char **errstr) +{ + char *ep; + id_t ret = 0; + long long llval; + bool valid = false; + debug_decl(sudo_strtoid, SUDO_DEBUG_UTIL) + + /* skip leading space so we can pick up the sign, if any */ + while (isspace((unsigned char)*p)) + p++; + if (sep == NULL) + sep = ""; + errno = 0; + llval = strtoll(p, &ep, 10); + if (ep != p) { + /* check for valid separator (including '\0') */ + do { + if (*ep == *sep) + valid = true; + } while (*sep++ != '\0'); + } + if (!valid) { + if (errstr != NULL) + *errstr = N_("invalid value"); + errno = EINVAL; + goto done; + } + if (errno == ERANGE) { + if (errstr != NULL) { + if (llval == LLONG_MAX) + *errstr = N_("value too large"); + else + *errstr = N_("value too small"); + } + goto done; + } + ret = (id_t)llval; + if (errstr != NULL) + *errstr = NULL; + if (endp != NULL) + *endp = ep; +done: + debug_return_id_t(ret); +} +#else +id_t +sudo_strtoid_v1(const char *p, const char *sep, char **endp, const char **errstr) +{ + char *ep; + id_t ret = 0; + bool valid = false; + debug_decl(sudo_strtoid, SUDO_DEBUG_UTIL) + + /* skip leading space so we can pick up the sign, if any */ + while (isspace((unsigned char)*p)) + p++; + if (sep == NULL) + sep = ""; + errno = 0; + if (*p == '-') { + long lval = strtol(p, &ep, 10); + if (ep != p) { + /* check for valid separator (including '\0') */ + do { + if (*ep == *sep) + valid = true; + } while (*sep++ != '\0'); + } + if (!valid) { + if (errstr != NULL) + *errstr = N_("invalid value"); + errno = EINVAL; + goto done; + } + if ((errno == ERANGE && lval == LONG_MAX) || lval > INT_MAX) { + errno = ERANGE; + if (errstr != NULL) + *errstr = N_("value too large"); + goto done; + } + if ((errno == ERANGE && lval == LONG_MIN) || lval < INT_MIN) { + errno = ERANGE; + if (errstr != NULL) + *errstr = N_("value too small"); + goto done; + } + ret = (id_t)lval; + } else { + unsigned long ulval = strtoul(p, &ep, 10); + if (ep != p) { + /* check for valid separator (including '\0') */ + do { + if (*ep == *sep) + valid = true; + } while (*sep++ != '\0'); + } + if (!valid) { + if (errstr != NULL) + *errstr = N_("invalid value"); + errno = EINVAL; + goto done; + } + if ((errno == ERANGE && ulval == ULONG_MAX) || ulval > UINT_MAX) { + errno = ERANGE; + if (errstr != NULL) + *errstr = N_("value too large"); + goto done; + } + ret = (id_t)ulval; + } + if (errstr != NULL) + *errstr = NULL; + if (endp != NULL) + *endp = ep; +done: + debug_return_id_t(ret); +} +#endif /* SIZEOF_ID_T == 8 */ |