Adding upstream version 1:4.13+dfsg1.upstream/1%4.13+dfsg1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 340 insertions, 0 deletions

diff --git a/libmisc/prefix_flag.c b/libmisc/prefix_flag.c
new file mode 100644
index 0000000..4eb5154
--- /dev/null
+++ b/libmisc/prefix_flag.c
@@ -0,0 +1,340 @@
+/*
+ * SPDX-FileCopyrightText: 2011       , Julian Pidancet
+ * SPDX-FileCopyrightText: 2011       , Nicolas François
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <config.h>
+
+#ident "$Id$"
+
+#include <stdio.h>
+#include <assert.h>
+#include "defines.h"
+#include "prototypes.h"
+/*@-exitarg@*/
+#include "exitcodes.h"
+#include "groupio.h"
+#include "pwio.h"
+#ifdef	SHADOWGRP
+#include "sgroupio.h"
+#endif
+#include "shadowio.h"
+#ifdef ENABLE_SUBIDS
+#include "subordinateio.h"
+#endif				/* ENABLE_SUBIDS */
+#include "getdef.h"
+#include "shadowlog.h"
+
+static char *passwd_db_file = NULL;
+static char *spw_db_file = NULL;
+static char *group_db_file = NULL;
+static char *sgroup_db_file = NULL;
+static char *suid_db_file = NULL;
+static char *sgid_db_file = NULL;
+static char *def_conf_file = NULL;
+static FILE* fp_pwent = NULL;
+static FILE* fp_grent = NULL;
+
+/*
+ * process_prefix_flag - prefix all paths if given the --prefix option
+ *
+ * This shall be called before accessing the passwd, group, shadow,
+ * gshadow, useradd's default, login.defs files (non exhaustive list)
+ * or authenticating the caller.
+ *
+ * The audit, syslog, or locale files shall be open before
+ */
+extern const char* process_prefix_flag (const char* short_opt, int argc, char **argv)
+{
+	/*
+	 * Parse the command line options.
+	 */
+	int i;
+	const char *prefix = NULL, *val;
+
+	for (i = 0; i < argc; i++) {
+		val = NULL;
+		if (   (strcmp (argv[i], "--prefix") == 0)
+		    || ((strncmp (argv[i], "--prefix=", 9) == 0)
+			&& (val = argv[i] + 9))
+		    || (strcmp (argv[i], short_opt) == 0)) {
+			if (NULL != prefix) {
+				fprintf (log_get_logfd(),
+				         _("%s: multiple --prefix options\n"),
+				         log_get_progname());
+				exit (E_BAD_ARG);
+			}
+
+			if (val) {
+				prefix = val;
+			} else if (i + 1 == argc) {
+				fprintf (log_get_logfd(),
+				         _("%s: option '%s' requires an argument\n"),
+				         log_get_progname(), argv[i]);
+				exit (E_BAD_ARG);
+			} else {
+				prefix = argv[++ i];
+			}
+		}
+	}
+
+
+
+	if (prefix != NULL) {
+		if ( prefix[0] == '\0' || !strcmp(prefix, "/"))
+			return ""; /* if prefix is "/" then we ignore the flag option */
+		/* should we prevent symbolic link from being used as a prefix? */
+
+		if ( prefix[0] != '/') {
+			fprintf (log_get_logfd(),
+				 _("%s: prefix must be an absolute path\n"),
+				 log_get_progname());
+			exit (E_BAD_ARG);
+		}
+		size_t len;
+		len = strlen(prefix) + strlen(PASSWD_FILE) + 2;
+		passwd_db_file = xmalloc(len);
+		snprintf(passwd_db_file, len, "%s/%s", prefix, PASSWD_FILE);
+		pw_setdbname(passwd_db_file);
+
+		len = strlen(prefix) + strlen(GROUP_FILE) + 2;
+		group_db_file = xmalloc(len);
+		snprintf(group_db_file, len, "%s/%s", prefix, GROUP_FILE);
+		gr_setdbname(group_db_file);
+
+#ifdef  SHADOWGRP
+		len = strlen(prefix) + strlen(SGROUP_FILE) + 2;
+		sgroup_db_file = xmalloc(len);
+		snprintf(sgroup_db_file, len, "%s/%s", prefix, SGROUP_FILE);
+		sgr_setdbname(sgroup_db_file);
+#endif
+#ifdef	USE_NIS
+		__setspNIS(0); /* disable NIS for now, at least until it is properly supporting a "prefix" */
+#endif
+
+		len = strlen(prefix) + strlen(SHADOW_FILE) + 2;
+		spw_db_file = xmalloc(len);
+		snprintf(spw_db_file, len, "%s/%s", prefix, SHADOW_FILE);
+		spw_setdbname(spw_db_file);
+
+#ifdef ENABLE_SUBIDS
+		len = strlen(prefix) + strlen("/etc/subuid") + 2;
+		suid_db_file = xmalloc(len);
+		snprintf(suid_db_file, len, "%s/%s", prefix, "/etc/subuid");
+		sub_uid_setdbname(suid_db_file);
+
+		len = strlen(prefix) + strlen("/etc/subgid") + 2;
+		sgid_db_file = xmalloc(len);
+		snprintf(sgid_db_file, len, "%s/%s", prefix, "/etc/subgid");
+		sub_gid_setdbname(sgid_db_file);
+#endif
+
+#ifdef USE_ECONF
+		setdef_config_file(prefix);
+#else
+		len = strlen(prefix) + strlen("/etc/login.defs") + 2;
+		def_conf_file = xmalloc(len);
+		snprintf(def_conf_file, len, "%s/%s", prefix, "/etc/login.defs");
+		setdef_config_file(def_conf_file);
+#endif
+	}
+
+	if (prefix == NULL)
+		return "";
+	return prefix;
+}
+
+
+extern struct group *prefix_getgrnam(const char *name)
+{
+	if (group_db_file) {
+		FILE* fg;
+		struct group * grp = NULL;
+
+		fg = fopen(group_db_file, "rt");
+		if (!fg)
+			return NULL;
+		while ((grp = fgetgrent(fg)) != NULL) {
+			if (!strcmp(name, grp->gr_name))
+				break;
+		}
+		fclose(fg);
+		return grp;
+	}
+
+	return getgrnam(name);
+}
+
+extern struct group *prefix_getgrgid(gid_t gid)
+{
+	if (group_db_file) {
+		FILE* fg;
+		struct group * grp = NULL;
+
+		fg = fopen(group_db_file, "rt");
+		if (!fg)
+			return NULL;
+		while ((grp = fgetgrent(fg)) != NULL) {
+			if (gid == grp->gr_gid)
+				break;
+		}
+		fclose(fg);
+		return grp;
+	}
+
+	return getgrgid(gid);
+}
+
+extern struct passwd *prefix_getpwuid(uid_t uid)
+{
+	if (passwd_db_file) {
+		FILE* fg;
+		struct passwd *pwd = NULL;
+
+		fg = fopen(passwd_db_file, "rt");
+		if (!fg)
+			return NULL;
+		while ((pwd = fgetpwent(fg)) != NULL) {
+			if (uid == pwd->pw_uid)
+				break;
+		}
+		fclose(fg);
+		return pwd;
+	}
+	else {
+		return getpwuid(uid);
+	}
+}
+extern struct passwd *prefix_getpwnam(const char* name)
+{
+	if (passwd_db_file) {
+		FILE* fg;
+		struct passwd *pwd = NULL;
+
+		fg = fopen(passwd_db_file, "rt");
+		if (!fg)
+			return NULL;
+		while ((pwd = fgetpwent(fg)) != NULL) {
+			if (!strcmp(name, pwd->pw_name))
+				break;
+		}
+		fclose(fg);
+		return pwd;
+	}
+	else {
+		return getpwnam(name);
+	}
+}
+extern struct spwd *prefix_getspnam(const char* name)
+{
+	if (spw_db_file) {
+		FILE* fg;
+		struct spwd *sp = NULL;
+
+		fg = fopen(spw_db_file, "rt");
+		if (!fg)
+			return NULL;
+		while ((sp = fgetspent(fg)) != NULL) {
+			if (!strcmp(name, sp->sp_namp))
+				break;
+		}
+		fclose(fg);
+		return sp;
+	}
+	else {
+		return getspnam(name);
+	}
+}
+
+extern void prefix_setpwent(void)
+{
+	if (!passwd_db_file) {
+		setpwent();
+		return;
+	}
+	if (fp_pwent)
+		fclose (fp_pwent);
+
+	fp_pwent = fopen(passwd_db_file, "rt");
+	if (!fp_pwent)
+		return;
+}
+extern struct passwd* prefix_getpwent(void)
+{
+	if (!passwd_db_file) {
+		return getpwent();
+	}
+	if (!fp_pwent) {
+		return NULL;
+	}
+	return fgetpwent(fp_pwent);
+}
+extern void prefix_endpwent(void)
+{
+	if (!passwd_db_file) {
+		endpwent();
+		return;
+	}
+	if (fp_pwent)
+		fclose(fp_pwent);
+	fp_pwent = NULL;
+}
+
+extern void prefix_setgrent(void)
+{
+	if (!group_db_file) {
+		setgrent();
+		return;
+	}
+	if (fp_grent)
+		fclose (fp_grent);
+
+	fp_grent = fopen(group_db_file, "rt");
+	if (!fp_grent)
+		return;
+}
+extern struct group* prefix_getgrent(void)
+{
+	if (!group_db_file) {
+		return getgrent();
+	}
+	return fgetgrent(fp_grent);
+}
+extern void prefix_endgrent(void)
+{
+	if (!group_db_file) {
+		endgrent();
+		return;
+	}
+	if (fp_grent)
+		fclose(fp_grent);
+	fp_grent = NULL;
+}
+
+extern struct group *prefix_getgr_nam_gid(const char *grname)
+{
+	long long int gid;
+	char *endptr;
+	struct group *g;
+
+	if (NULL == grname) {
+		return NULL;
+	}
+
+	if (group_db_file) {
+		errno = 0;
+		gid = strtoll (grname, &endptr, 10);
+		if (   ('\0' != *grname)
+	    	&& ('\0' == *endptr)
+	    	&& (ERANGE != errno)
+	    	&& (gid == (gid_t)gid)) {
+			return prefix_getgrgid ((gid_t) gid);
+		}
+		g = prefix_getgrnam (grname);
+		return g ? __gr_dup(g) : NULL;
+	}
+	else
+		return getgr_nam_gid(grname);
+}