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-rw-r--r--runit/chpst.c128
1 files changed, 82 insertions, 46 deletions
diff --git a/runit/chpst.c b/runit/chpst.c
index 87cd8e0..0c26d83 100644
--- a/runit/chpst.c
+++ b/runit/chpst.c
@@ -39,21 +39,43 @@ ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#define OPT_nostdout (option_mask32 & 0x10000)
#define OPT_nostderr (option_mask32 & 0x20000)
-static char *set_user;
-static char *env_user;
-static const char *env_dir;
-static long limitd = -2;
-static long limits = -2;
-static long limitl = -2;
-static long limita = -2;
-static long limito = -2;
-static long limitp = -2;
-static long limitf = -2;
-static long limitc = -2;
-static long limitr = -2;
-static long limitt = -2;
-static int nicelvl;
-static const char *root;
+struct globals {
+ char *set_user;
+ char *env_user;
+ const char *env_dir;
+ const char *root;
+ long limitd; /* limitX are initialized to -2 */
+ long limits;
+ long limitl;
+ long limita;
+ long limito;
+ long limitp;
+ long limitf;
+ long limitc;
+ long limitr;
+ long limitt;
+ int nicelvl;
+};
+#define G (*(struct globals*)&bb_common_bufsiz1)
+#define set_user (G.set_user)
+#define env_user (G.env_user)
+#define env_dir (G.env_dir )
+#define root (G.root )
+#define limitd (G.limitd )
+#define limits (G.limits )
+#define limitl (G.limitl )
+#define limita (G.limita )
+#define limito (G.limito )
+#define limitp (G.limitp )
+#define limitf (G.limitf )
+#define limitc (G.limitc )
+#define limitr (G.limitr )
+#define limitt (G.limitt )
+#define nicelvl (G.nicelvl )
+#define INIT_G() do { \
+ long *p = &limitd; \
+ do *p++ = -2; while (p <= &limitt); \
+} while (0)
static void suidgid(char *user)
{
@@ -100,7 +122,8 @@ static void edir(const char *directory_name)
directory_name);
break;
}
- if (d->d_name[0] == '.') continue;
+ if (d->d_name[0] == '.')
+ continue;
fd = open(d->d_name, O_RDONLY | O_NDELAY);
if (fd < 0) {
if ((errno == EISDIR) && env_dir) {
@@ -129,9 +152,9 @@ static void edir(const char *directory_name)
tail = memchr(buf, '\n', sizeof(buf));
/* skip trailing whitespace */;
while (1) {
- if (tail[0]==' ') tail[0] = '\0';
- if (tail[0]=='\t') tail[0] = '\0';
- if (tail[0]=='\n') tail[0] = '\0';
+ if (tail[0] == ' ') tail[0] = '\0';
+ if (tail[0] == '\t') tail[0] = '\0';
+ if (tail[0] == '\n') tail[0] = '\0';
if (tail == buf) break;
tail--;
}
@@ -139,7 +162,8 @@ static void edir(const char *directory_name)
}
}
closedir(dir);
- if (fchdir(wdir) == -1) bb_perror_msg_and_die("fchdir");
+ if (fchdir(wdir) == -1)
+ bb_perror_msg_and_die("fchdir");
close(wdir);
}
@@ -147,12 +171,14 @@ static void limit(int what, long l)
{
struct rlimit r;
- if (getrlimit(what, &r) == -1) bb_perror_msg_and_die("getrlimit");
+ if (getrlimit(what, &r) == -1)
+ bb_perror_msg_and_die("getrlimit");
if ((l < 0) || (l > r.rlim_max))
r.rlim_cur = r.rlim_max;
else
r.rlim_cur = l;
- if (setrlimit(what, &r) == -1) bb_perror_msg_and_die("setrlimit");
+ if (setrlimit(what, &r) == -1)
+ bb_perror_msg_and_die("setrlimit");
}
static void slimit(void)
@@ -161,24 +187,27 @@ static void slimit(void)
#ifdef RLIMIT_DATA
limit(RLIMIT_DATA, limitd);
#else
- if (OPT_verbose) bb_error_msg("system does not support %s",
- "RLIMIT_DATA");
+ if (OPT_verbose)
+ bb_error_msg("system does not support RLIMIT_%s",
+ "DATA");
#endif
}
if (limits >= -1) {
#ifdef RLIMIT_STACK
limit(RLIMIT_STACK, limits);
#else
- if (OPT_verbose) bb_error_msg("system does not support %s",
- "RLIMIT_STACK");
+ if (OPT_verbose)
+ bb_error_msg("system does not support RLIMIT_%s",
+ "STACK");
#endif
}
if (limitl >= -1) {
#ifdef RLIMIT_MEMLOCK
limit(RLIMIT_MEMLOCK, limitl);
#else
- if (OPT_verbose) bb_error_msg("system does not support %s",
- "RLIMIT_MEMLOCK");
+ if (OPT_verbose)
+ bb_error_msg("system does not support RLIMIT_%s",
+ "MEMLOCK");
#endif
}
if (limita >= -1) {
@@ -189,8 +218,8 @@ static void slimit(void)
limit(RLIMIT_AS, limita);
#else
if (OPT_verbose)
- bb_error_msg("system does not support %s",
- "RLIMIT_VMEM");
+ bb_error_msg("system does not support RLIMIT_%s",
+ "VMEM");
#endif
#endif
}
@@ -202,8 +231,8 @@ static void slimit(void)
limit(RLIMIT_OFILE, limito);
#else
if (OPT_verbose)
- bb_error_msg("system does not support %s",
- "RLIMIT_NOFILE");
+ bb_error_msg("system does not support RLIMIT_%s",
+ "NOFILE");
#endif
#endif
}
@@ -211,53 +240,60 @@ static void slimit(void)
#ifdef RLIMIT_NPROC
limit(RLIMIT_NPROC, limitp);
#else
- if (OPT_verbose) bb_error_msg("system does not support %s",
- "RLIMIT_NPROC");
+ if (OPT_verbose)
+ bb_error_msg("system does not support RLIMIT_%s",
+ "NPROC");
#endif
}
if (limitf >= -1) {
#ifdef RLIMIT_FSIZE
limit(RLIMIT_FSIZE, limitf);
#else
- if (OPT_verbose) bb_error_msg("system does not support %s",
- "RLIMIT_FSIZE");
+ if (OPT_verbose)
+ bb_error_msg("system does not support RLIMIT_%s",
+ "FSIZE");
#endif
}
if (limitc >= -1) {
#ifdef RLIMIT_CORE
limit(RLIMIT_CORE, limitc);
#else
- if (OPT_verbose) bb_error_msg("system does not support %s",
- "RLIMIT_CORE");
+ if (OPT_verbose)
+ bb_error_msg("system does not support RLIMIT_%s",
+ "CORE");
#endif
}
if (limitr >= -1) {
#ifdef RLIMIT_RSS
limit(RLIMIT_RSS, limitr);
#else
- if (OPT_verbose) bb_error_msg("system does not support %s",
- "RLIMIT_RSS");
+ if (OPT_verbose)
+ bb_error_msg("system does not support RLIMIT_%s",
+ "RSS");
#endif
}
if (limitt >= -1) {
#ifdef RLIMIT_CPU
limit(RLIMIT_CPU, limitt);
#else
- if (OPT_verbose) bb_error_msg("system does not support %s",
- "RLIMIT_CPU");
+ if (OPT_verbose)
+ bb_error_msg("system does not support RLIMIT_%s",
+ "CPU");
#endif
}
}
/* argv[0] */
-static void setuidgid(int, char **);
-static void envuidgid(int, char **);
-static void envdir(int, char **);
-static void softlimit(int, char **);
+static void setuidgid(int, char **) ATTRIBUTE_NORETURN;
+static void envuidgid(int, char **) ATTRIBUTE_NORETURN;
+static void envdir(int, char **) ATTRIBUTE_NORETURN;
+static void softlimit(int, char **) ATTRIBUTE_NORETURN;
int chpst_main(int argc, char **argv);
int chpst_main(int argc, char **argv)
{
+ INIT_G();
+
if (applet_name[3] == 'd') envdir(argc, argv);
if (applet_name[1] == 'o') softlimit(argc, argv);
if (applet_name[0] == 's') setuidgid(argc, argv);
generated by cgit v1.1 at 2024-12-27 22:10:44 +0000