Diff of /trunk/mkinitrd-magellan/busybox/libbb/login.c

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	revision 815 by niro, Sat Sep 1 22:45:15 2007 UTC	revision 816 by niro, Fri Apr 24 18:33:46 2009 UTC
#	Line 10	Line 10
10	*/	*/
11
12	#include <sys/param.h>  /* MAXHOSTNAMELEN */	#include <sys/param.h>  /* MAXHOSTNAMELEN */
	#include <stdio.h>
	#include <unistd.h>
	#include "libbb.h"
13	#include <sys/utsname.h>	#include <sys/utsname.h>
14	#include <time.h>	#include "libbb.h"
15
16	#define LOGIN " login: "	#define LOGIN " login: "
17
18	static const char fmtstr_d[] = "%A, %d %B %Y";	static const char fmtstr_d[] ALIGN1 = "%A, %d %B %Y";
19	static const char fmtstr_t[] = "%H:%M:%S";	static const char fmtstr_t[] ALIGN1 = "%H:%M:%S";
20
21	void print_login_issue(const char *issue_file, const char *tty)	void FAST_FUNC print_login_issue(const char *issue_file, const char *tty)
22	{	{
23	FILE *fd;	FILE *fp;
24	int c;	int c;
25	char buf[256+1];	char buf[256+1];
26	const char *outbuf;	const char *outbuf;
#	Line 36  void print_login_issue(const char *issue	Line 32  void print_login_issue(const char *issue
32
33	puts("\r"); /* start a new line */	puts("\r"); /* start a new line */
34
35	fd = fopen(issue_file, "r");	fp = fopen_for_read(issue_file);
36	if (!fd)	if (!fp)
37	return;	return;
38	while ((c = fgetc(fd)) != EOF) {	while ((c = fgetc(fp)) != EOF) {
39	outbuf = buf;	outbuf = buf;
40	buf[0] = c;	buf[0] = c;
41	buf[1] = '\0';	buf[1] = '\0';
42	if(c == '\n') {	if (c == '\n') {
43	buf[1] = '\r';	buf[1] = '\r';
44	buf[2] = '\0';	buf[2] = '\0';
45	}	}
46	if (c == '\\' || c == '%') {	if (c == '\\' || c == '%') {
47	c = fgetc(fd);	c = fgetc(fp);
48	switch (c) {	switch (c) {
49	case 's':	case 's':
50	outbuf = uts.sysname;	outbuf = uts.sysname;
51	break;	break;
52	case 'n':	case 'n':
53		case 'h':
54	outbuf = uts.nodename;	outbuf = uts.nodename;
55	break;	break;
56	case 'r':	case 'r':
#	Line 67  void print_login_issue(const char *issue	Line 64  void print_login_issue(const char *issue
64	break;	break;
65	case 'D':	case 'D':
66	case 'o':	case 'o':
67	c = getdomainname(buf, sizeof(buf) - 1);	outbuf = uts.domainname;
	buf[c >= 0 ? c : 0] = '\0';
68	break;	break;
69	case 'd':	case 'd':
70	strftime(buf, sizeof(buf), fmtstr_d, localtime(&t));	strftime(buf, sizeof(buf), fmtstr_d, localtime(&t));
#	Line 76  void print_login_issue(const char *issue	Line 72  void print_login_issue(const char *issue
72	case 't':	case 't':
73	strftime(buf, sizeof(buf), fmtstr_t, localtime(&t));	strftime(buf, sizeof(buf), fmtstr_t, localtime(&t));
74	break;	break;
	case 'h':
	gethostname(buf, sizeof(buf) - 1);
	buf[sizeof(buf) - 1] = '\0';
	break;
75	case 'l':	case 'l':
76	outbuf = tty;	outbuf = tty;
77	break;	break;
#	Line 89  void print_login_issue(const char *issue	Line 81  void print_login_issue(const char *issue
81	}	}
82	fputs(outbuf, stdout);	fputs(outbuf, stdout);
83	}	}
84	fclose(fd);	fclose(fp);
85	fflush(stdout);	fflush(stdout);
86	}	}
87
88	void print_login_prompt(void)	void FAST_FUNC print_login_prompt(void)
89	{	{
90	char buf[MAXHOSTNAMELEN+1];	char *hostname = safe_gethostname();
	if (gethostname(buf, MAXHOSTNAMELEN) == 0)
	fputs(buf, stdout);
91
92		fputs(hostname, stdout);
93	fputs(LOGIN, stdout);	fputs(LOGIN, stdout);
94	fflush(stdout);	fflush(stdout);
95		free(hostname);
96		}
97
98		/* Clear dangerous stuff, set PATH */
99		static const char forbid[] ALIGN1 =
100		"ENV" "\0"
101		"BASH_ENV" "\0"
102		"HOME" "\0"
103		"IFS" "\0"
104		"SHELL" "\0"
105		"LD_LIBRARY_PATH" "\0"
106		"LD_PRELOAD" "\0"
107		"LD_TRACE_LOADED_OBJECTS" "\0"
108		"LD_BIND_NOW" "\0"
109		"LD_AOUT_LIBRARY_PATH" "\0"
110		"LD_AOUT_PRELOAD" "\0"
111		"LD_NOWARN" "\0"
112		"LD_KEEPDIR" "\0";
113
114		int FAST_FUNC sanitize_env_if_suid(void)
115		{
116		const char *p;
117
118		if (getuid() == geteuid())
119		return 0;
120
121		p = forbid;
122		do {
123		unsetenv(p);
124		p += strlen(p) + 1;
125		} while (*p);
126		putenv((char*)bb_PATH_root_path);
127
128		return 1; /* we indeed were run by different user! */
129	}	}

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