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23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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29 * @(#)sysctl.c 8.2 (Berkeley) 1/4/94
30 * $FreeBSD: head/lib/libc/gen/sysctl.c 240176 2012-09-06 20:15:44Z trhodes $
33 #include <sys/param.h>
34 #include <sys/sysctl.h>
43 extern int __sysctl(const int *name, u_int namelen, void *oldp,
44 size_t *oldlenp, const void *newp, size_t newlen);
47 sysctl(const int *name, u_int namelen, void *oldp, size_t *oldlenp,
48 const void *newp, size_t newlen)
53 orig_oldlen = oldlenp ? *oldlenp : 0;
54 retval = __sysctl(name, namelen, oldp, oldlenp, newp, newlen);
56 * All valid names under CTL_USER have a dummy entry in the sysctl
57 * tree (to support name lookups and enumerations) with an
58 * empty/zero value, and the true value is supplied by this routine.
59 * For all such names, __sysctl() is used solely to validate the
62 * Return here unless there was a successful lookup for a CTL_USER
65 if (retval || name[0] != CTL_USER)
79 if (oldp && orig_oldlen < sizeof(_PATH_STDPATH)) {
83 *oldlenp = sizeof(_PATH_STDPATH);
85 memmove(oldp, _PATH_STDPATH, sizeof(_PATH_STDPATH));
89 if (oldp && *oldlenp < sizeof(int)) {
93 *oldlenp = sizeof(int);
98 case USER_BC_BASE_MAX:
99 *(int *)oldp = BC_BASE_MAX;
101 case USER_BC_DIM_MAX:
102 *(int *)oldp = BC_DIM_MAX;
104 case USER_BC_SCALE_MAX:
105 *(int *)oldp = BC_SCALE_MAX;
107 case USER_BC_STRING_MAX:
108 *(int *)oldp = BC_STRING_MAX;
110 case USER_COLL_WEIGHTS_MAX:
111 *(int *)oldp = COLL_WEIGHTS_MAX;
113 case USER_EXPR_NEST_MAX:
114 *(int *)oldp = EXPR_NEST_MAX;
117 *(int *)oldp = LINE_MAX;
119 case USER_RE_DUP_MAX:
120 *(int *)oldp = RE_DUP_MAX;
122 case USER_POSIX2_VERSION:
123 *(int *)oldp = _POSIX2_VERSION;
125 case USER_POSIX2_C_BIND:
126 #if _POSIX2_C_BIND > 0
132 case USER_POSIX2_C_DEV:
133 #if _POSIX2_C_DEV > 0
139 case USER_POSIX2_CHAR_TERM:
140 #if _POSIX2_CHAR_TERM > 0
146 case USER_POSIX2_FORT_DEV:
147 #if _POSIX2_FORT_DEV > 0
153 case USER_POSIX2_FORT_RUN:
154 #if _POSIX2_FORT_RUN > 0
160 case USER_POSIX2_LOCALEDEF:
161 #if _POSIX2_LOCALEDEF > 0
167 case USER_POSIX2_SW_DEV:
168 #if _POSIX2_SW_DEV > 0
174 case USER_POSIX2_UPE:
181 case USER_STREAM_MAX:
182 *(int *)oldp = FOPEN_MAX;
184 case USER_TZNAME_MAX:
185 *(int *)oldp = NAME_MAX;