Add four utility functions related to struct grp processing modeled in-part
after similar calls related to struct pwd in libutil/pw_util.c:
- gr_equal()
Perform a deep comparison of two struct grp's. It does a thorough, yet
unoptimized comparison of all the members regardless of order.
- gr_make()
Create a string (see group(5)) from a struct grp.
- gr_dup()
Duplicate a struct grp. Returns a value that is a single contiguous
block of memory.
- gr_scan()
Create a struct grp from a string (as produced by gr_make()).
MFC after: 3 weeks
This commit is contained in:
scf
parent
e3c15650b0
commit
cab3742f10
@ -8,7 +8,7 @@ SHLIBDIR?= /lib
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LIB= util
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SHLIB_MAJOR= 7
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SRCS= _secure_path.c auth.c expand_number.c flopen.c fparseln.c \
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SRCS= _secure_path.c auth.c gr_util.c expand_number.c flopen.c fparseln.c \
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humanize_number.c kld.c login.c login_auth.c login_cap.c login_class.c \
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login_crypt.c login_ok.c login_times.c login_tty.c logout.c \
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logwtmp.c pidfile.c property.c pty.c pw_util.c realhostname.c \
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234
lib/libutil/gr_util.c
Normal file
234
lib/libutil/gr_util.c
Normal file
@ -0,0 +1,234 @@
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/*-
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* Copyright (c) 2008 Sean C. Farley <scf@FreeBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer,
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* without modification, immediately at the beginning of the file.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <grp.h>
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#include <inttypes.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <libutil.h>
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static const char GroupLineFormat[] = "%s:%s:%ju:";
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/*
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* Compares two struct group's.
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*/
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int
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gr_equal(const struct group *gr1, const struct group *gr2)
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{
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bool found;
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bool equal;
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int gr1Ndx;
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int gr2Ndx;
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/* Check that the non-member information is the same. */
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equal = strcmp(gr1->gr_name, gr2->gr_name) == 0 &&
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strcmp(gr1->gr_passwd, gr2->gr_passwd) == 0 &&
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gr1->gr_gid == gr2->gr_gid;
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/* Check all members in both groups. */
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if (equal) {
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for (found = false, gr1Ndx = 0; gr1->gr_mem[gr1Ndx] != NULL;
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gr1Ndx++) {
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for (gr2Ndx = 0; gr2->gr_mem[gr2Ndx] != NULL; gr2Ndx++)
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if (strcmp(gr1->gr_mem[gr1Ndx],
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gr2->gr_mem[gr2Ndx]) == 0) {
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found = true;
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break;
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}
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if (! found) {
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equal = false;
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break;
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}
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}
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/* Check that group2 does not have more members than group1. */
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if (gr2->gr_mem[gr1Ndx] != NULL)
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equal = false;
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}
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return (equal);
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}
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/*
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* Make a group line out of a struct group.
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*/
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char *
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gr_make(const struct group *gr)
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{
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char *line;
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int ndx;
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size_t lineSize;
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/* Calculate the length of the group line. */
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lineSize = snprintf(NULL, 0, GroupLineFormat, gr->gr_name,
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gr->gr_passwd, (uintmax_t)gr->gr_gid) + 1;
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for (ndx = 0; gr->gr_mem[ndx] != NULL; ndx++)
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lineSize += strlen(gr->gr_mem[ndx]) + 1;
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if (ndx > 0)
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lineSize--;
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/* Create the group line and fill it. */
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if ((line = malloc(lineSize)) == NULL)
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return (NULL);
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lineSize = snprintf(line, lineSize, GroupLineFormat, gr->gr_name,
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gr->gr_passwd, (uintmax_t)gr->gr_gid);
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for (ndx = 0; gr->gr_mem[ndx] != NULL; ndx++) {
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strcat(line, gr->gr_mem[ndx]);
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if (gr->gr_mem[ndx + 1] != NULL)
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strcat(line, ",");
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}
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return (line);
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}
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/*
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* Duplicate a struct group.
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*/
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struct group *
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gr_dup(const struct group *gr)
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{
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int ndx;
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int numMem;
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size_t len;
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struct group *ngr;
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/* Calculate size of group. */
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len = sizeof(*gr) +
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(gr->gr_name != NULL ? strlen(gr->gr_name) + 1 : 0) +
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(gr->gr_passwd != NULL ? strlen(gr->gr_passwd) + 1 : 0);
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numMem = 0;
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if (gr->gr_mem != NULL) {
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for (; gr->gr_mem[numMem] != NULL; numMem++)
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len += strlen(gr->gr_mem[numMem]) + 1;
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len += (numMem + 1) * sizeof(*(gr->gr_mem));
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}
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/* Create new group and copy old group into it. */
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if ((ngr = calloc(1, len)) == NULL)
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return (NULL);
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len = sizeof(*ngr);
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ngr->gr_gid = gr->gr_gid;
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if (gr->gr_name != NULL) {
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ngr->gr_name = (char *)ngr + len;
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len += sprintf(ngr->gr_name, "%s", gr->gr_name) + 1;
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}
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if (gr->gr_passwd != NULL) {
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ngr->gr_passwd = (char *)ngr + len;
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len += sprintf(ngr->gr_passwd, "%s", gr->gr_passwd) + 1;
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}
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if (gr->gr_mem != NULL) {
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ngr->gr_mem = (char **)((char *)ngr + len);
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len += (numMem + 1) * sizeof(*(ngr->gr_mem));
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for (ndx = 0; gr->gr_mem[ndx] != NULL; ndx++) {
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ngr->gr_mem[ndx] = (char *)ngr + len;
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len += sprintf(ngr->gr_mem[ndx], "%s",
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gr->gr_mem[ndx]) + 1;
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}
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ngr->gr_mem[ndx] = NULL;
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}
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return (ngr);
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}
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/*
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* Scan a line and place it into a group structure.
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*/
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static bool
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__gr_scan(char *line, struct group *gr)
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{
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char *loc;
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int ndx;
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/* Assign non-member information to structure. */
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gr->gr_name = line;
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if ((loc = strchr(line, ':')) == NULL)
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return (false);
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*loc = '\0';
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gr->gr_passwd = loc + 1;
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if (*(gr->gr_passwd) == ':')
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*(gr->gr_passwd) = '\0';
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else {
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if ((loc = strchr(loc + 1, ':')) == NULL)
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return (false);
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*loc = '\0';
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}
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if (sscanf(loc + 1, "%u", &(gr->gr_gid)) != 1)
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return (false);
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/* Assign member information to structure. */
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if ((loc = strchr(loc + 1, ':')) == NULL)
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return (false);
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line = loc + 1;
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gr->gr_mem = NULL;
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if (*line != '\0') {
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ndx = 0;
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do {
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if ((gr->gr_mem = reallocf(gr->gr_mem,
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sizeof(*(gr->gr_mem)) * (ndx + 1))) == NULL)
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return (false);
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gr->gr_mem[ndx] = strsep(&line, ",");
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} while (gr->gr_mem[ndx++] != NULL);
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}
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return (true);
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}
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/*
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* Create a struct group from a line.
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*/
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struct group *
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gr_scan(const char *line)
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{
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char *lineCopy;
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struct group *newGr;
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struct group gr;
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if ((lineCopy = strdup(line)) == NULL)
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return (NULL);
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if (!__gr_scan(lineCopy, &gr)) {
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free(lineCopy);
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return (NULL);
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}
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newGr = gr_dup(&gr);
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free(lineCopy);
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if (gr.gr_mem != NULL)
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free(gr.gr_mem);
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return (newGr);
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}
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@ -119,6 +119,13 @@ const char *pw_tempname(void);
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int pw_tmp(int _mfd);
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#endif
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#ifdef _GRP_H_
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int gr_equal(const struct group *gr1, const struct group *gr2);
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char *gr_make(const struct group *gr);
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struct group *gr_dup(const struct group *gr);
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struct group *gr_scan(const char *line);
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#endif
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#ifdef _SYS_PARAM_H_
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struct pidfh *pidfile_open(const char *path, mode_t mode, pid_t *pidptr);
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int pidfile_write(struct pidfh *pfh);
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@ -1,6 +1,6 @@
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# $FreeBSD$
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TESTS= test-trimdomain test-trimdomain-nodomain test-flopen
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TESTS= test-trimdomain test-trimdomain-nodomain test-flopen test-grp
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CFLAGS+= -g -Wall -lutil
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.PHONY: tests
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117
tools/regression/lib/libutil/test-grp.c
Normal file
117
tools/regression/lib/libutil/test-grp.c
Normal file
@ -0,0 +1,117 @@
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/*-
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* Copyright (c) 2008 Sean C. Farley <scf@FreeBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer,
|
||||
* without modification, immediately at the beginning of the file.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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||||
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/types.h>
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#include <errno.h>
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#include <grp.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <libutil.h>
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/*
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* Static values for building and testing an artificial group.
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*/
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static char grpName[] = "groupName";
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static char grpPasswd[] = "groupPwd";
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static gid_t grpGID = 1234;
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static char *grpMems[] = { "mem1", "mem2", "mem3", NULL };
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static const char *origStrGrp = "groupName:groupPwd:1234:mem1,mem2,mem3";
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/*
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* Build a group to test against without depending on a real group to be found
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* within /etc/group.
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*/
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static void
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build_grp(struct group *grp)
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{
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grp->gr_name = grpName;
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grp->gr_passwd = grpPasswd;
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grp->gr_gid = grpGID;
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grp->gr_mem = grpMems;
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return;
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}
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int
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main(int argc, char **argv)
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{
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char *strGrp;
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int testNdx;
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struct group *dupGrp;
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struct group *scanGrp;
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struct group origGrp;
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/* Setup. */
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printf("1..4\n");
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testNdx = 0;
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/* Manually build a group using static values. */
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build_grp(&origGrp);
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/* Copy the group. */
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testNdx++;
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if ((dupGrp = gr_dup(&origGrp)) == NULL)
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printf("not ");
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printf("ok %d - %s\n", testNdx, "gr_dup");
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/* Compare the original and duplicate groups. */
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testNdx++;
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if (! gr_equal(&origGrp, dupGrp))
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printf("not ");
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printf("ok %d - %s\n", testNdx, "gr_equal");
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/* Create group string from the duplicate group structure. */
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testNdx++;
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strGrp = gr_make(dupGrp);
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if (strcmp(strGrp, origStrGrp) != 0)
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printf("not ");
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printf("ok %d - %s\n", testNdx, "gr_make");
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/*
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* Create group structure from string and compare it to the original
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* group structure.
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*/
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testNdx++;
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if ((scanGrp = gr_scan(strGrp)) == NULL || ! gr_equal(&origGrp,
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scanGrp))
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printf("not ");
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printf("ok %d - %s\n", testNdx, "gr_scan");
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/* Clean up. */
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free(scanGrp);
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free(strGrp);
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free(dupGrp);
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exit(EXIT_SUCCESS);
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}
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12
tools/regression/lib/libutil/test-grp.t
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12
tools/regression/lib/libutil/test-grp.t
Normal file
@ -0,0 +1,12 @@
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#!/bin/sh
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#
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# $FreeBSD$
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#
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base=$(realpath $(dirname $0))
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name=$(basename $0 .t)
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set -e
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cd $base
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make -s $name >/dev/null
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exec $base/$name
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Loading…
Reference in New Issue
Block a user