libc: open internal file-descriptor with OCEXEC flag
parent
544bca0290
commit
f1e15da8f5
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@ -24,7 +24,7 @@ access(char *name, int mode)
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return 0;
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return 0;
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return -1;
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return -1;
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}
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}
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fd = open(name, omode[mode&7]);
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fd = open(name, omode[mode&7]|OCEXEC);
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if(fd >= 0){
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if(fd >= 0){
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close(fd);
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close(fd);
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return 0;
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return 0;
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@ -18,7 +18,8 @@ getenv(char *name)
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snprint(s, HUNK, "/env/%s", name);
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snprint(s, HUNK, "/env/%s", name);
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n = 0;
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n = 0;
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r = -1;
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r = -1;
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if((f = open(s, OREAD)) >= 0){
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f = open(s, OREAD|OCEXEC);
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if(f >= 0){
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while((r = read(f, s+n, HUNK)) > 0){
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while((r = read(f, s+n, HUNK)) > 0){
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n += r;
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n += r;
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r = -1;
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r = -1;
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@ -13,7 +13,7 @@ getendpoint(char *dir, char *file, char **sysp, char **servp)
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sys = serv = 0;
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sys = serv = 0;
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snprint(buf, sizeof buf, "%s/%s", dir, file);
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snprint(buf, sizeof buf, "%s/%s", dir, file);
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fd = open(buf, OREAD);
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fd = open(buf, OREAD|OCEXEC);
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if(fd >= 0){
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if(fd >= 0){
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n = read(fd, buf, sizeof(buf)-1);
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n = read(fd, buf, sizeof(buf)-1);
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if(n>0){
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if(n>0){
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@ -41,7 +41,6 @@ getnetconninfo(char *dir, int fd)
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NetConnInfo *nci;
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NetConnInfo *nci;
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char *cp;
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char *cp;
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Dir *d;
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Dir *d;
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char spec[10];
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char path[128];
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char path[128];
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char netname[128], *p;
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char netname[128], *p;
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@ -76,10 +75,8 @@ getnetconninfo(char *dir, int fd)
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/* figure out bind spec */
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/* figure out bind spec */
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d = dirstat(nci->dir);
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d = dirstat(nci->dir);
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if(d != nil){
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if(d != nil)
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sprint(spec, "#%C%d", d->type, d->dev);
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nci->spec = smprint("#%C%d", d->type, d->dev);
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nci->spec = strdup(spec);
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}
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if(nci->spec == nil)
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if(nci->spec == nil)
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nci->spec = unknown;
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nci->spec = unknown;
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free(d);
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free(d);
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@ -8,7 +8,7 @@ getppid(void)
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int f;
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int f;
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memset(b, 0, sizeof(b));
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memset(b, 0, sizeof(b));
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f = open("/dev/ppid", 0);
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f = open("/dev/ppid", OREAD|OCEXEC);
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if(f >= 0) {
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if(f >= 0) {
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read(f, b, sizeof(b));
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read(f, b, sizeof(b));
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close(f);
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close(f);
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@ -1,14 +1,12 @@
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#include <u.h>
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#include <u.h>
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#include <libc.h>
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#include <libc.h>
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static char *nsgetwd(char*, int);
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char*
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char*
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getwd(char *buf, int nbuf)
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getwd(char *buf, int nbuf)
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{
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{
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int n, fd;
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int n, fd;
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fd = open(".", OREAD);
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fd = open(".", OREAD|OCEXEC);
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if(fd < 0)
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if(fd < 0)
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return nil;
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return nil;
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n = fd2path(fd, buf, nbuf);
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n = fd2path(fd, buf, nbuf);
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@ -13,7 +13,7 @@ iounit(int fd)
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char buf[128], *args[10];
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char buf[128], *args[10];
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snprint(buf, sizeof buf, "#d/%dctl", fd);
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snprint(buf, sizeof buf, "#d/%dctl", fd);
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cfd = open(buf, OREAD);
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cfd = open(buf, OREAD|OCEXEC);
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if(cfd < 0)
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if(cfd < 0)
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return 0;
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return 0;
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i = read(cfd, buf, sizeof buf-1);
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i = read(cfd, buf, sizeof buf-1);
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@ -4,21 +4,21 @@
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int
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int
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postnote(int group, int pid, char *note)
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postnote(int group, int pid, char *note)
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{
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{
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char file[128];
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char file[32];
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int f, r;
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int f, r;
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switch(group) {
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switch(group) {
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case PNPROC:
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case PNPROC:
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sprint(file, "/proc/%d/note", pid);
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snprint(file, sizeof(file), "/proc/%lud/note", (ulong)pid);
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break;
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break;
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case PNGROUP:
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case PNGROUP:
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sprint(file, "/proc/%d/notepg", pid);
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snprint(file, sizeof(file), "/proc/%lud/notepg", (ulong)pid);
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break;
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break;
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default:
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default:
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return -1;
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return -1;
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}
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}
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f = open(file, OWRITE);
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f = open(file, OWRITE|OCEXEC);
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if(f < 0)
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if(f < 0)
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return -1;
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return -1;
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@ -8,8 +8,9 @@ procsetname(char *fmt, ...)
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char buf[128];
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char buf[128];
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va_list arg;
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va_list arg;
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snprint(buf, sizeof buf, "#p/%lud/args", (ulong)getpid());
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snprint(buf, sizeof buf, "/proc/%lud/args", (ulong)getpid());
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if((fd = open(buf, OWRITE)) < 0)
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fd = open(buf, OWRITE|OCEXEC);
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if(fd < 0)
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return;
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return;
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va_start(arg, fmt);
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va_start(arg, fmt);
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n = vsnprint(buf, sizeof buf, fmt, arg);
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n = vsnprint(buf, sizeof buf, fmt, arg);
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@ -11,7 +11,7 @@ int
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pushssl(int fd, char *alg, char *secin, char *secout, int *cfd)
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pushssl(int fd, char *alg, char *secin, char *secout, int *cfd)
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{
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{
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char buf[8];
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char buf[8];
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char dname[64];
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char dname[32];
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int n, data, ctl;
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int n, data, ctl;
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ctl = open("#D/ssl/clone", ORDWR);
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ctl = open("#D/ssl/clone", ORDWR);
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@ -21,7 +21,7 @@ pushssl(int fd, char *alg, char *secin, char *secout, int *cfd)
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if(n < 0)
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if(n < 0)
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goto error;
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goto error;
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buf[n] = 0;
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buf[n] = 0;
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sprint(dname, "#D/ssl/%s/data", buf);
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snprint(dname, sizeof(dname), "#D/ssl/%s/data", buf);
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data = open(dname, ORDWR);
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data = open(dname, ORDWR);
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if(data < 0)
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if(data < 0)
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goto error;
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goto error;
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@ -42,14 +42,14 @@ int
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pushtls(int fd, char *hashalg, char *encalg, int isclient, char *secret, char *dir)
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pushtls(int fd, char *hashalg, char *encalg, int isclient, char *secret, char *dir)
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{
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{
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char buf[8];
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char buf[8];
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char dname[64];
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char dname[32];
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int n, data, ctl, hand;
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int n, data, ctl, hand;
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// open a new filter; get ctl fd
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// open a new filter; get ctl fd
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data = hand = -1;
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data = hand = -1;
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// /net/tls uses decimal file descriptors to name channels, hence a
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// /net/tls uses decimal file descriptors to name channels, hence a
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// user-level file server can't stand in for #a; may as well hard-code it.
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// user-level file server can't stand in for #a; may as well hard-code it.
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ctl = open("#a/tls/clone", ORDWR);
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ctl = open("#a/tls/clone", ORDWR|OCEXEC);
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if(ctl < 0)
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if(ctl < 0)
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goto error;
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goto error;
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n = read(ctl, buf, sizeof(buf)-1);
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n = read(ctl, buf, sizeof(buf)-1);
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@ -60,14 +60,14 @@ pushtls(int fd, char *hashalg, char *encalg, int isclient, char *secret, char *d
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sprint(dir, "#a/tls/%s", buf);
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sprint(dir, "#a/tls/%s", buf);
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// get application fd
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// get application fd
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sprint(dname, "#a/tls/%s/data", buf);
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snprint(dname, sizeof(dname), "#a/tls/%s/data", buf);
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data = open(dname, ORDWR);
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data = open(dname, ORDWR);
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if(data < 0)
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if(data < 0)
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goto error;
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goto error;
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// get handshake fd
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// get handshake fd
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sprint(dname, "#a/tls/%s/hand", buf);
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snprint(dname, sizeof(dname), "#a/tls/%s/hand", buf);
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hand = open(dname, ORDWR);
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hand = open(dname, ORDWR|OCEXEC);
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if(hand < 0)
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if(hand < 0)
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goto error;
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goto error;
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@ -13,7 +13,7 @@ putenv(char *name, char *val)
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return -1;
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return -1;
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}
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}
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snprint(ename, sizeof(ename), "/env/%s", name);
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snprint(ename, sizeof(ename), "/env/%s", name);
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f = create(ename, OWRITE, 0664);
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f = create(ename, OWRITE|OCEXEC, 0664);
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if(f < 0)
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if(f < 0)
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return -1;
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return -1;
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n = strlen(val);
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n = strlen(val);
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@ -10,7 +10,7 @@ sysname(void)
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if(b[0])
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if(b[0])
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return b;
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return b;
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f = open("#c/sysname", 0);
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f = open("/dev/sysname", OREAD|OCEXEC);
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if(f >= 0) {
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if(f >= 0) {
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n = read(f, b, sizeof(b)-1);
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n = read(f, b, sizeof(b)-1);
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if(n > 0)
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if(n > 0)
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@ -174,11 +174,12 @@ loadzone(Tzone *tz, char *name)
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else
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else
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snprint(path, sizeof(path), "/adm/timezone/%s", name);
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snprint(path, sizeof(path), "/adm/timezone/%s", name);
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memset(buf, 0, sizeof(buf));
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memset(buf, 0, sizeof(buf));
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if((f = open(path, 0)) == -1)
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f = open(path, OREAD|OCEXEC);
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if(f < 0)
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return -1;
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return -1;
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r = read(f, buf, sizeof(buf));
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r = read(f, buf, sizeof(buf));
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close(f);
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close(f);
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if(r == sizeof(buf) || r == -1)
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if(r < 0 || r >= sizeof(buf))
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return -1;
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return -1;
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buf[r] = 0;
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buf[r] = 0;
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p = buf;
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p = buf;
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@ -8,7 +8,7 @@ getuser(void)
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int fd;
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int fd;
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int n;
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int n;
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fd = open("/dev/user", OREAD);
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fd = open("/dev/user", OREAD|OCEXEC);
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if(fd < 0)
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if(fd < 0)
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return "none";
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return "none";
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n = read(fd, user, (sizeof user)-1);
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n = read(fd, user, (sizeof user)-1);
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@ -99,13 +99,13 @@ checkenv(void)
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{
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{
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int n, fd;
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int n, fd;
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char buf[20];
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char buf[20];
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fd = open("/env/MALLOCFD", OREAD);
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fd = open("/env/MALLOCFD", OREAD|OCEXEC);
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if(fd < 0)
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if(fd < 0)
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return -1;
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return -1;
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if((n = read(fd, buf, sizeof buf)) < 0) {
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n = read(fd, buf, sizeof buf);
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close(fd);
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close(fd);
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if(n < 0)
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return -1;
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return -1;
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}
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if(n >= sizeof buf)
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if(n >= sizeof buf)
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n = sizeof(buf)-1;
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n = sizeof(buf)-1;
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buf[n] = 0;
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buf[n] = 0;
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@ -137,7 +137,7 @@ _profdump(void)
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snprint(filename, sizeof filename - 1, "prof.%ld", _tos->prof.pid);
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snprint(filename, sizeof filename - 1, "prof.%ld", _tos->prof.pid);
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else
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else
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snprint(filename, sizeof filename - 1, "prof.out");
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snprint(filename, sizeof filename - 1, "prof.out");
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f = create(filename, 1, 0666);
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f = create(filename, OWRITE|OCEXEC, 0666);
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if(f < 0) {
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if(f < 0) {
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perror("create prof.out");
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perror("create prof.out");
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return;
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return;
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@ -245,7 +245,7 @@ _profmain(void)
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khz = _tos->cyclefreq / 1000; /* Report times in milliseconds */
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khz = _tos->cyclefreq / 1000; /* Report times in milliseconds */
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havecycles = 1;
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havecycles = 1;
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}
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}
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f = open("/env/profsize", OREAD);
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f = open("/env/profsize", OREAD|OCEXEC);
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if(f >= 0) {
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if(f >= 0) {
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memset(ename, 0, sizeof(ename));
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memset(ename, 0, sizeof(ename));
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read(f, ename, sizeof(ename)-1);
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read(f, ename, sizeof(ename)-1);
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@ -253,7 +253,7 @@ _profmain(void)
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n = atol(ename);
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n = atol(ename);
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}
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}
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_tos->prof.what = Profuser;
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_tos->prof.what = Profuser;
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f = open("/env/proftype", OREAD);
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f = open("/env/proftype", OREAD|OCEXEC);
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if(f >= 0) {
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if(f >= 0) {
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memset(ename, 0, sizeof(ename));
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memset(ename, 0, sizeof(ename));
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read(f, ename, sizeof(ename)-1);
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read(f, ename, sizeof(ename)-1);
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