diff options
Diffstat (limited to 'libpwdgrp/__getgrent.c')
| -rw-r--r-- | libpwdgrp/__getgrent.c | 203 |
1 files changed, 0 insertions, 203 deletions
diff --git a/libpwdgrp/__getgrent.c b/libpwdgrp/__getgrent.c deleted file mode 100644 index 3b54b9eec..000000000 --- a/libpwdgrp/__getgrent.c +++ /dev/null @@ -1,203 +0,0 @@ -/* - * __getgrent.c - This file is part of the libc-8086/grp package for ELKS, - * Copyright (C) 1995, 1996 Nat Friedman <ndf@linux.mit.edu>. - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Library General Public - * License as published by the Free Software Foundation; either - * version 2 of the License, or (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Library General Public License for more details. - * - * You should have received a copy of the GNU Library General Public - * License along with this library; if not, write to the Free - * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - * - */ - -#include <unistd.h> -#include <stdlib.h> -#include <string.h> - -#include "busybox.h" -#include "grp_.h" - -/* - * Define GR_SCALE_DYNAMIC if you want grp to dynamically scale its read buffer - * so that lines of any length can be used. On very very small systems, - * you may want to leave this undefined because it will make the grp functions - * somewhat larger (because of the inclusion of malloc and the code necessary). - * On larger systems, you will want to define this, because grp will _not_ - * deal with long lines gracefully (they will be skipped). - */ -#undef GR_SCALE_DYNAMIC - -#ifndef GR_SCALE_DYNAMIC -/* - * If scaling is not dynamic, the buffers will be statically allocated, and - * maximums must be chosen. GR_MAX_LINE_LEN is the maximum number of - * characters per line in the group file. GR_MAX_MEMBERS is the maximum - * number of members of any given group. - */ -#define GR_MAX_LINE_LEN 128 -/* GR_MAX_MEMBERS = (GR_MAX_LINE_LEN-(24+3+6))/9 */ -#define GR_MAX_MEMBERS 11 - -#endif /* !GR_SCALE_DYNAMIC */ - - -/* - * Define GR_DYNAMIC_GROUP_LIST to make initgroups() dynamically allocate - * space for it's GID array before calling setgroups(). This is probably - * unnecessary scalage, so it's undefined by default. - */ -#undef GR_DYNAMIC_GROUP_LIST - -#ifndef GR_DYNAMIC_GROUP_LIST -/* - * GR_MAX_GROUPS is the size of the static array initgroups() uses for - * its static GID array if GR_DYNAMIC_GROUP_LIST isn't defined. - */ -#define GR_MAX_GROUPS 64 - -#endif /* !GR_DYNAMIC_GROUP_LIST */ - - -/* - * This is the core group-file read function. It behaves exactly like - * getgrent() except that it is passed a file descriptor. getgrent() - * is just a wrapper for this function. - */ -struct group *bb_getgrent(int grp_fd) -{ -#ifndef GR_SCALE_DYNAMIC - static char line_buff[GR_MAX_LINE_LEN]; - static char *members[GR_MAX_MEMBERS]; -#else - static char *line_buff = NULL; - static char **members = NULL; - short line_index; - short buff_size; -#endif - static struct group group; - register char *ptr; - char *field_begin; - short member_num; - char *endptr; - int line_len; - - - /* We use the restart label to handle malformatted lines */ - restart: -#ifdef GR_SCALE_DYNAMIC - line_index = 0; - buff_size = 256; -#endif - -#ifndef GR_SCALE_DYNAMIC - /* Read the line into the static buffer */ - if ((line_len = read(grp_fd, line_buff, GR_MAX_LINE_LEN)) <= 0) - return NULL; - field_begin = strchr(line_buff, '\n'); - if (field_begin != NULL) - lseek(grp_fd, (long) (1 + field_begin - (line_buff + line_len)), - SEEK_CUR); - else { /* The line is too long - skip it :-\ */ - - do { - if ((line_len = read(grp_fd, line_buff, GR_MAX_LINE_LEN)) <= 0) - return NULL; - } while (!(field_begin = strchr(line_buff, '\n'))); - lseek(grp_fd, (long) ((field_begin - line_buff) - line_len + 1), - SEEK_CUR); - goto restart; - } - if (*line_buff == '#' || *line_buff == ' ' || *line_buff == '\n' || - *line_buff == '\t') - goto restart; - *field_begin = '\0'; - -#else /* !GR_SCALE_DYNAMIC */ - line_buff = realloc(line_buff, buff_size); - while (1) { - if ((line_len = read(grp_fd, line_buff + line_index, - buff_size - line_index)) <= 0) - return NULL; - field_begin = strchr(line_buff, '\n'); - if (field_begin != NULL) { - lseek(grp_fd, - (long) (1 + field_begin - - (line_len + line_index + line_buff)), SEEK_CUR); - *field_begin = '\0'; - if (*line_buff == '#' || *line_buff == ' ' - || *line_buff == '\n' || *line_buff == '\t') - goto restart; - break; - } else { /* Allocate some more space */ - - line_index = buff_size; - buff_size += 256; - line_buff = realloc(line_buff, buff_size); - } - } -#endif /* GR_SCALE_DYNAMIC */ - - /* Now parse the line */ - group.gr_name = line_buff; - ptr = strchr(line_buff, ':'); - if (ptr == NULL) - goto restart; - *ptr++ = '\0'; - - group.gr_passwd = ptr; - ptr = strchr(ptr, ':'); - if (ptr == NULL) - goto restart; - *ptr++ = '\0'; - - field_begin = ptr; - ptr = strchr(ptr, ':'); - if (ptr == NULL) - goto restart; - *ptr++ = '\0'; - - group.gr_gid = (gid_t) strtoul(field_begin, &endptr, 10); - if (*endptr != '\0') - goto restart; - - member_num = 0; - field_begin = ptr; - -#ifndef GR_SCALE_DYNAMIC - while ((ptr = strchr(ptr, ',')) != NULL) { - *ptr = '\0'; - ptr++; - members[member_num] = field_begin; - field_begin = ptr; - member_num++; - } - if (*field_begin == '\0') - members[member_num] = NULL; - else { - members[member_num] = field_begin; - members[member_num + 1] = NULL; - } -#else /* !GR_SCALE_DYNAMIC */ - free(members); - members = (char **) malloc((member_num + 1) * sizeof(char *)); - for ( ; field_begin && *field_begin != '\0'; field_begin = ptr) { - if ((ptr = strchr(field_begin, ',')) != NULL) - *ptr++ = '\0'; - members[member_num++] = field_begin; - members = (char **) realloc(members, - (member_num + 1) * sizeof(char *)); - } - members[member_num] = NULL; -#endif /* GR_SCALE_DYNAMIC */ - - group.gr_mem = members; - return &group; -} |