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author | Cameron Katri <me@cameronkatri.com> | 2021-05-09 14:20:58 -0400 |
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committer | Cameron Katri <me@cameronkatri.com> | 2021-05-09 14:20:58 -0400 |
commit | 5fd83771641d15c418f747bd343ba6738d3875f7 (patch) | |
tree | 5abf0f78f680d9837dbd93d4d4c3933bb7509599 /system_cmds/at.tproj/perm.c | |
download | apple_cmds-5fd83771641d15c418f747bd343ba6738d3875f7.tar.gz apple_cmds-5fd83771641d15c418f747bd343ba6738d3875f7.tar.zst apple_cmds-5fd83771641d15c418f747bd343ba6738d3875f7.zip |
Import macOS userland
adv_cmds-176
basic_cmds-55
bootstrap_cmds-116.100.1
developer_cmds-66
diskdev_cmds-667.40.1
doc_cmds-53.60.1
file_cmds-321.40.3
mail_cmds-35
misc_cmds-34
network_cmds-606.40.1
patch_cmds-17
remote_cmds-63
shell_cmds-216.60.1
system_cmds-880.60.2
text_cmds-106
Diffstat (limited to 'system_cmds/at.tproj/perm.c')
-rw-r--r-- | system_cmds/at.tproj/perm.c | 125 |
1 files changed, 125 insertions, 0 deletions
diff --git a/system_cmds/at.tproj/perm.c b/system_cmds/at.tproj/perm.c new file mode 100644 index 0000000..82bab87 --- /dev/null +++ b/system_cmds/at.tproj/perm.c @@ -0,0 +1,125 @@ +/* + * perm.c - check user permission for at(1) + * Copyright (C) 1994 Thomas Koenig + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. The name of the author(s) may not be used to endorse or promote + * products derived from this software without specific prior written + * permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD: src/usr.bin/at/perm.c,v 1.13 2001/12/10 21:13:01 dwmalone Exp $"); + +/* System Headers */ + +#include <sys/types.h> +#include <err.h> +#include <errno.h> +#include <pwd.h> +#include <stddef.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> + +/* Local headers */ + +#include "at.h" +#include "panic.h" +#include "perm.h" +#include "privs.h" + +/* Macros */ + +#define MAXUSERID 10 + +/* Structures and unions */ + +/* Function declarations */ + +static int check_for_user(FILE *fp,const char *name); + +/* Local functions */ + +static int check_for_user(FILE *fp,const char *name) +{ + char *buffer; + int len; + int found = 0; + + len = (int)strlen(name); + if ((buffer = malloc(len+2)) == NULL) + errx(EXIT_FAILURE, "virtual memory exhausted"); + + while(fgets(buffer, len+2, fp) != NULL) + { + if ((strncmp(name, buffer, len) == 0) && + (buffer[len] == '\n')) + { + found = 1; + break; + } + } + fclose(fp); + free(buffer); + return found; +} +/* Global functions */ +int check_permission(void) +{ + FILE *fp; + uid_t uid = geteuid(); + struct passwd *pentry; + + if (uid==0) + return 1; + + if ((pentry = getpwuid(uid)) == NULL) + err(EXIT_FAILURE, "cannot access user database"); + + PRIV_START + + fp=fopen(PERM_PATH "at.allow","r"); + + PRIV_END + + if (fp != NULL) + { + return check_for_user(fp, pentry->pw_name); + } + else if (errno == ENOENT) + { + + PRIV_START + + fp=fopen(PERM_PATH "at.deny", "r"); + + PRIV_END + + if (fp != NULL) + { + return !check_for_user(fp, pentry->pw_name); + } + else if (errno != ENOENT) + warn("at.deny"); + } + else + warn("at.allow"); + return 0; +} |