* Licensed under GPLv2 or later, see file License in this tarball for details.
*/
-#include "busybox.h"
-#include <unistd.h>
-#include <string.h>
#include <assert.h>
+#include "busybox.h"
+
+#define PROTOTYPES
+#include "applets.h"
+#undef PROTOTYPES
+
+
+/* Apparently uclibc defines __GLIBC__ (compat trick?). Oh well. */
+#if ENABLE_STATIC && defined(__GLIBC__) && !defined(__UCLIBC__)
+#warning Static linking against glibc produces buggy executables
+#warning (glibc does not cope well with ld --gc-sections).
+#warning See sources.redhat.com/bugzilla/show_bug.cgi?id=3400
+#warning Note that glibc is unsuitable for static linking anyway.
+#warning If you still want to do it, remove -Wl,--gc-sections
+#warning from top-level Makefile and remove this warning.
+#endif
#if ENABLE_SHOW_USAGE && !ENABLE_FEATURE_COMPRESS_USAGE
static const char usage_messages[] =
static struct BB_applet *applet_using;
-/* The -1 arises because of the {0,NULL,0,-1} entry above. */
-const size_t NUM_APPLETS = (sizeof (applets) / sizeof (struct BB_applet) - 1);
+/* The -1 arises because of the {0,NULL,0,-1} entry. */
+const unsigned short NUM_APPLETS = (sizeof(applets) / sizeof(struct BB_applet) - 1);
-#ifdef CONFIG_FEATURE_SUID_CONFIG
+#if ENABLE_FEATURE_SUID_CONFIG
#include <ctype.h>
-#define CONFIG_FILE "/etc/busybox.conf"
-
/* applets [] is const, so we have to define this "override" structure */
static struct BB_suid_config
{
}
-#define parse_error(x) { err=x; goto pe_label; }
+#define parse_error(x) do { errmsg = x; goto pe_label; } while(0)
/* Don't depend on the tools to combine strings. */
-static const char config_file[] = CONFIG_FILE;
+static const char config_file[] = "/etc/busybox.conf";
/* There are 4 chars + 1 nul for each of user/group/other. */
static const char mode_chars[] = "Ssx-\0Ssx-\0Ttx-";
struct BB_suid_config *sct;
struct BB_applet *applet;
FILE *f;
- char *err;
+ const char *errmsg;
char *s;
char *e;
int i, lc, section;
char buffer[256];
struct stat st;
- assert(!suid_config); /* Should be set to NULL by bss init. */
+ assert(!suid_config); /* Should be set to NULL by bss init. */
- if ((stat(config_file, &st) != 0) /* No config file? */
- || !S_ISREG(st.st_mode) /* Not a regular file? */
- || (st.st_uid != 0) /* Not owned by root? */
- || (st.st_mode & (S_IWGRP | S_IWOTH)) /* Writable by non-root? */
- || !(f = fopen(config_file, "r")) /* Can not open? */
- ) {
+ if ((stat(config_file, &st) != 0) /* No config file? */
+ || !S_ISREG(st.st_mode) /* Not a regular file? */
+ || (st.st_uid != 0) /* Not owned by root? */
+ || (st.st_mode & (S_IWGRP | S_IWOTH)) /* Writable by non-root? */
+ || !(f = fopen(config_file, "r")) /* Cannot open? */
+ ) {
return;
}
/* Trim leading and trailing whitespace, ignoring comments, and
* check if the resulting string is empty. */
- if (!*(s = get_trimmed_slice(s, strchrnul(s, '#')))) {
+ s = get_trimmed_slice(s, strchrnul(s, '#'));
+ if (!*s) {
continue;
}
/* Unlike the old code, we ignore leading and trailing
* whitespace for the section name. We also require that
* there are no stray characters after the closing bracket. */
- if (!(e = strchr(s, ']')) /* Missing right bracket? */
- || e[1] /* Trailing characters? */
- || !*(s = get_trimmed_slice(s+1, e)) /* Missing name? */
- ) {
+ e = strchr(s, ']');
+ if (!e /* Missing right bracket? */
+ || e[1] /* Trailing characters? */
+ || !*(s = get_trimmed_slice(s+1, e)) /* Missing name? */
+ ) {
parse_error("section header");
}
/* Right now we only have one section so just check it.
* where both key and value could contain inner whitespace. */
/* First get the key (an applet name in our case). */
- if (!!(e = strchr(s, '='))) {
+ e = strchr(s, '=');
+ if (e) {
s = get_trimmed_slice(s, e);
}
if (!e || !*s) { /* Missing '=' or empty key. */
* applet is currently built in and ignore it otherwise.
* Note: This can hide config file bugs which only pop
* up when the busybox configuration is changed. */
- if ((applet = find_applet_by_name(s))) {
+ applet = find_applet_by_name(s);
+ if (applet) {
/* Note: We currently don't check for duplicates!
* The last config line for each applet will be the
* one used since we insert at the head of the list.
e = skip_whitespace(e+1);
- for (i=0 ; i < 3 ; i++) {
+ for (i = 0; i < 3; i++) {
const char *q;
- if (!*(q = strchrnul(mode_chars + 5*i, *e++))) {
+ q = strchrnul(mode_chars + 5*i, *e++);
+ if (!*q) {
parse_error("mode");
}
/* Adjust by -i to account for nul. */
if ((s == e) || !(e = strchr(s, '.'))) {
parse_error("<uid>.<gid>");
}
- *e++ = 0;
+ *e++ = '\0';
/* We can't use get_ug_id here since it would exit()
* if a uid or gid was not found. Oh well... */
- {
- char *e2;
-
- sct->m_uid = strtoul(s, &e2, 10);
- if (*e2 || (s == e2)) {
- struct passwd *pwd = getpwnam(s);
- if (!pwd) {
- parse_error("user");
- }
- sct->m_uid = pwd->pw_uid;
+ sct->m_uid = bb_strtoul(s, NULL, 10);
+ if (errno) {
+ struct passwd *pwd = getpwnam(s);
+ if (!pwd) {
+ parse_error("user");
}
+ sct->m_uid = pwd->pw_uid;
+ }
- sct->m_gid = strtoul(e, &e2, 10);
- if (*e2 || (e == e2)) {
- struct group *grp;
- if (!(grp = getgrnam(e))) {
- parse_error("group");
- }
- sct->m_gid = grp->gr_gid;
+ sct->m_gid = bb_strtoul(e, NULL, 10);
+ if (errno) {
+ struct group *grp;
+ grp = getgrnam(e);
+ if (!grp) {
+ parse_error("group");
}
+ sct->m_gid = grp->gr_gid;
}
}
continue;
pe_label:
fprintf(stderr, "Parse error in %s, line %d: %s\n",
- config_file, lc, err);
+ config_file, lc, errmsg);
fclose(f);
/* Release any allocated memory before returning. */
free(sct_head);
sct_head = sct;
}
- return;
}
#else
-#define parse_config_file()
+#define parse_config_file() ((void)0)
#endif /* CONFIG_FEATURE_SUID_CONFIG */
-#ifdef CONFIG_FEATURE_SUID
+#if ENABLE_FEATURE_SUID
static void check_suid(struct BB_applet *applet)
{
uid_t ruid = getuid(); /* real [ug]id */
uid_t rgid = getgid();
-#ifdef CONFIG_FEATURE_SUID_CONFIG
+#if ENABLE_FEATURE_SUID_CONFIG
if (suid_cfg_readable) {
struct BB_suid_config *sct;
+ mode_t m;
for (sct = suid_config; sct; sct = sct->m_next) {
if (sct->m_applet == applet)
- break;
+ goto found;
}
- if (sct) {
- mode_t m = sct->m_mode;
-
- if (sct->m_uid == ruid) /* same uid */
- m >>= 6;
- else if ((sct->m_gid == rgid) || ingroup(ruid, sct->m_gid)) /* same group / in group */
- m >>= 3;
-
- if (!(m & S_IXOTH)) /* is x bit not set ? */
- bb_error_msg_and_die ("You have no permission to run this applet!");
-
- if ((sct->m_mode & (S_ISGID | S_IXGRP)) == (S_ISGID | S_IXGRP)) { /* *both* have to be set for sgid */
+ /* default: drop all privileges */
+ xsetgid(rgid);
+ xsetuid(ruid);
+ return;
+ found:
+ m = sct->m_mode;
+ if (sct->m_uid == ruid)
+ /* same uid */
+ m >>= 6;
+ else if ((sct->m_gid == rgid) || ingroup(ruid, sct->m_gid))
+ /* same group / in group */
+ m >>= 3;
+
+ if (!(m & S_IXOTH)) /* is x bit not set ? */
+ bb_error_msg_and_die("you have no permission to run this applet!");
+
+ if (sct->m_gid != 0) {
+ /* _both_ have to be set for sgid */
+ if ((sct->m_mode & (S_ISGID | S_IXGRP)) == (S_ISGID | S_IXGRP)) {
xsetgid(sct->m_gid);
- } else xsetgid(rgid); /* no sgid -> drop */
-
+ } else xsetgid(rgid); /* no sgid -> drop */
+ }
+ if (sct->m_uid != 0) {
if (sct->m_mode & S_ISUID) xsetuid(sct->m_uid);
- else xsetuid(ruid); /* no suid -> drop */
- } else {
- /* default: drop all privileges */
- xsetgid(rgid);
- xsetuid(ruid);
+ else xsetuid(ruid); /* no suid -> drop */
}
return;
- } else {
-#ifndef CONFIG_FEATURE_SUID_CONFIG_QUIET
- static int onetime = 0;
+ }
+#if !ENABLE_FEATURE_SUID_CONFIG_QUIET
+ {
+ static smallint onetime = 0;
if (!onetime) {
onetime = 1;
fprintf(stderr, "Using fallback suid method\n");
}
-#endif
}
+#endif
#endif
if (applet->need_suid == _BB_SUID_ALWAYS) {
- if (geteuid()) bb_error_msg_and_die("Applet requires root privileges!");
+ if (geteuid())
+ bb_error_msg_and_die("applet requires root privileges!");
} else if (applet->need_suid == _BB_SUID_NEVER) {
xsetgid(rgid); /* drop all privileges */
xsetuid(ruid);
-#ifdef CONFIG_FEATURE_COMPRESS_USAGE
+#if ENABLE_FEATURE_COMPRESS_USAGE
#include "usage_compressed.h"
#include "unarchive.h"
int input[2], output[2], pid;
char *buf;
- if(pipe(input) < 0 || pipe(output) < 0)
+ if (pipe(input) < 0 || pipe(output) < 0)
exit(1);
pid = fork();
format_string = "%s\n\nUsage: %s %s\n\n";
if (*usage_string == '\b')
format_string = "%s\n\nNo help available.\n\n";
- fprintf (stderr, format_string, bb_msg_full_version,
+ fprintf(stderr, format_string, bb_msg_full_version,
applet_using->name, usage_string);
}
return strcmp(name, applet->name);
}
-extern const size_t NUM_APPLETS;
-
struct BB_applet *find_applet_by_name(const char *name)
{
return bsearch(name, applets, NUM_APPLETS, sizeof(struct BB_applet),
void run_applet_by_name(const char *name, int argc, char **argv)
{
- if (ENABLE_FEATURE_SUID_CONFIG) parse_config_file();
+ if (ENABLE_FEATURE_SUID_CONFIG)
+ parse_config_file();
- if (!strncmp(name, "busybox", 7)) busybox_main(argc, argv);
/* Do a binary search to find the applet entry given the name. */
applet_using = find_applet_by_name(name);
if (applet_using) {
applet_name = applet_using->name;
- if(argc==2 && !strcmp(argv[1], "--help")) bb_show_usage();
- if(ENABLE_FEATURE_SUID) check_suid(applet_using);
- exit((*(applet_using->main))(argc, argv));
+ if (argc == 2 && !strcmp(argv[1], "--help"))
+ bb_show_usage();
+ if (ENABLE_FEATURE_SUID)
+ check_suid(applet_using);
+ exit(applet_using->main(argc, argv));
}
+ if (!strncmp(name, "busybox", 7))
+ exit(busybox_main(argc, argv));
}
projects / oweals / busybox.git / blobdiff