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-rw-r--r--libc/stdlib/Makefile64
-rw-r--r--libc/stdlib/atexit.c117
-rw-r--r--libc/stdlib/bsearch.c46
-rw-r--r--libc/stdlib/getenv.c31
-rw-r--r--libc/stdlib/malloc/Makefile33
-rw-r--r--libc/stdlib/malloc/alloc.c82
-rw-r--r--libc/stdlib/mkstemp.c43
-rw-r--r--libc/stdlib/mktemp.c40
-rw-r--r--libc/stdlib/putenv.c62
-rw-r--r--libc/stdlib/qsort.c166
-rw-r--r--libc/stdlib/rand.c61
-rw-r--r--libc/stdlib/setenv.c73
-rw-r--r--libc/stdlib/strtod.c96
-rw-r--r--libc/stdlib/system.c48
14 files changed, 962 insertions, 0 deletions
diff --git a/libc/stdlib/Makefile b/libc/stdlib/Makefile
new file mode 100644
index 000000000..da8053f1d
--- /dev/null
+++ b/libc/stdlib/Makefile
@@ -0,0 +1,64 @@
+# Copyright (C) 1995,1996 Robert de Bath <rdebath@cix.compulink.co.uk>
+# This file is part of the Linux-8086 C library and is distributed
+# under the GNU Library General Public License.
+
+LIBC=../libc.a
+
+CC=m68k-pic-coff-gcc
+AR=m68k-pic-coff-ar
+RANLIB=m68k-pic-coff-ranlib
+
+CCFLAGS= -O2 -m68000 -msoft-float -fno-builtin -I../include
+
+MSRC=aliases.c
+MOBJ=abs.o remove.o creat.o bcopy.o bzero.o
+# raise.o bcmp.o index.o rindex.o
+
+
+ESRC=atexit.c
+EOBJ=on_exit.o atexit.o __do_exit.o exit.o
+
+GOBJ=atoi.o atol.o ltoa.o ltostr.o \
+ ctype.o qsort.o bsearch.o rand.o lsearch.o getopt.o \
+ itoa.o strtol.o crypt.o sleep.o mkstemp.o mktemp.o
+
+UOBJ=getenv.o putenv.o popen.o system.o getcwd.o setenv.o \
+ execl.o execv.o execlp.o execvp.o execvep.o
+
+
+OBJ=$(MOBJ) $(EOBJ) $(GOBJ) $(UOBJ)
+
+## No ELKS strtod() until BCC does 16 bit FP...
+#ifneq ($(LIB_CPU),i86)
+#OBJ+=strtod.o
+#endif
+
+CFLAGS=$(ARCH) $(CCFLAGS) $(DEFS)
+
+all: $(LIBC)
+ @$(RM) $(OBJ)
+
+$(LIBC): $(LIBC)($(OBJ))
+
+$(LIBC)($(MOBJ)): $(MSRC)
+ $(CC) $(CFLAGS) -DL_$* $< -c -o $*.o
+ $(AR) $(ARFLAGS) $@ $*.o
+
+$(LIBC)($(EOBJ)): $(ESRC)
+ $(CC) $(CFLAGS) -DL_$* $< -c -o $*.o
+ $(AR) $(ARFLAGS) $@ $*.o
+
+clean:
+ rm -f *.o libc.a
+
+$(LIBC)(strtol.o): strtol.c
+ $(CC) -c -ansi $(ARCH) $(CCFLAGS) $(DEFS) $*.c
+ $(AR) $(ARFLAGS) $@ $*.o
+
+$(LIBC)(strtod.o): strtod.c
+ $(CC) -c -ansi $(ARCH) $(CCFLAGS) $(DEFS) $*.c
+ $(AR) $(ARFLAGS) $@ $*.o
+
+$(LIBC)(crypt.o): crypt.c
+ $(CC) -c -ansi $(ARCH) $(CCFLAGS) $(DEFS) $*.c
+ $(AR) $(ARFLAGS) $@ $*.o
diff --git a/libc/stdlib/atexit.c b/libc/stdlib/atexit.c
new file mode 100644
index 000000000..2a82c6edb
--- /dev/null
+++ b/libc/stdlib/atexit.c
@@ -0,0 +1,117 @@
+/* Copyright (C) 1995,1996 Robert de Bath <rdebath@cix.compulink.co.uk>
+ * This file is part of the Linux-8086 C library and is distributed
+ * under the GNU Library General Public License.
+ */
+
+/*
+ * This deals with both the atexit and on_exit function calls
+ *
+ * Note calls installed with atexit are called with the same args as on_exit
+ * fuctions; the void* is given the NULL value.
+ *
+ */
+
+#include <errno.h>
+
+/* ATEXIT.H */
+#define MAXONEXIT 20 /* AIUI Posix requires 10 */
+
+typedef void (*vfuncp) ();
+
+extern vfuncp __cleanup;
+extern void __do_exit();
+
+extern struct exit_table
+{
+ vfuncp called;
+ void *argument;
+}
+__on_exit_table[MAXONEXIT];
+
+extern int __on_exit_count;
+
+/* End ATEXIT.H */
+
+#ifdef L_atexit
+vfuncp __cleanup;
+
+int
+atexit(ptr)
+vfuncp ptr;
+{
+ if( __on_exit_count < 0 || __on_exit_count >= MAXONEXIT)
+ {
+ errno = ENOMEM;
+ return -1;
+ }
+ __cleanup = __do_exit;
+ if( ptr )
+ {
+ __on_exit_table[__on_exit_count].called = ptr;
+ __on_exit_table[__on_exit_count].argument = 0;
+ __on_exit_count++;
+ }
+ return 0;
+}
+
+#endif
+
+#ifdef L_on_exit
+int
+on_exit(ptr, arg)
+vfuncp ptr;
+void *arg;
+{
+ if( __on_exit_count < 0 || __on_exit_count >= MAXONEXIT)
+ {
+ errno = ENOMEM;
+ return -1;
+ }
+ __cleanup = __do_exit;
+ if( ptr )
+ {
+ __on_exit_table[__on_exit_count].called = ptr;
+ __on_exit_table[__on_exit_count].argument = arg;
+ __on_exit_count++;
+ }
+ return 0;
+}
+
+#endif
+
+#ifdef L___do_exit
+
+int __on_exit_count = 0;
+struct exit_table __on_exit_table[MAXONEXIT];
+
+void
+__do_exit(rv)
+int rv;
+{
+ register int count = __on_exit_count-1;
+ register vfuncp ptr;
+ __on_exit_count = -1; /* ensure no more will be added */
+ __cleanup = 0; /* Calling exit won't re-do this */
+
+ /* In reverse order */
+ for (; count >= 0; count--)
+ {
+ ptr = __on_exit_table[count].called;
+ (*ptr) (rv, __on_exit_table[count].argument);
+ }
+}
+
+#endif
+
+#ifdef L_exit
+
+void
+exit(rv)
+int rv;
+{
+ if (__cleanup)
+ __cleanup();
+ _exit(rv);
+}
+
+#endif
diff --git a/libc/stdlib/bsearch.c b/libc/stdlib/bsearch.c
new file mode 100644
index 000000000..989866743
--- /dev/null
+++ b/libc/stdlib/bsearch.c
@@ -0,0 +1,46 @@
+
+/*
+ * This file lifted in toto from 'Dlibs' on the atari ST (RdeBath)
+ *
+ *
+ * Dale Schumacher 399 Beacon Ave.
+ * (alias: Dalnefre') St. Paul, MN 55104
+ * dal@syntel.UUCP United States of America
+ * "It's not reality that's important, but how you perceive things."
+ */
+#include <stdio.h>
+
+static int _bsearch; /* index of element found, or where to
+ * insert */
+
+char *
+bsearch(key, base, num, size, cmp)
+register char *key; /* item to search for */
+register char *base; /* base address */
+int num; /* number of elements */
+register int size; /* element size in bytes */
+register int (*cmp) (); /* comparison function */
+{
+ register int a, b, c, dir;
+
+ a = 0;
+ b = num - 1;
+ while (a <= b)
+ {
+ c = (a + b) >> 1; /* == ((a + b) / 2) */
+ if (dir = (*cmp) ((base + (c * size)), key))
+ {
+ if (dir > 0)
+ b = c - 1;
+ else /* (dir < 0) */
+ a = c + 1;
+ }
+ else
+ {
+ _bsearch = c;
+ return (base + (c * size));
+ }
+ }
+ _bsearch = b;
+ return (NULL);
+}
diff --git a/libc/stdlib/getenv.c b/libc/stdlib/getenv.c
new file mode 100644
index 000000000..1ed83a622
--- /dev/null
+++ b/libc/stdlib/getenv.c
@@ -0,0 +1,31 @@
+/* Copyright (C) 1995,1996 Robert de Bath <rdebath@cix.compulink.co.uk>
+ * This file is part of the Linux-8086 C library and is distributed
+ * under the GNU Library General Public License.
+ */
+#include <string.h>
+#include <stdlib.h>
+#include <malloc.h>
+
+extern char ** environ;
+
+char *
+getenv(var)
+const char * var;
+{
+ char **p;
+ int len;
+
+ len = strlen(var);
+
+ if (!environ)
+ return 0;
+
+ for(p=environ; *p; p++)
+ {
+ if( memcmp(var, *p, len) == 0 && (*p)[len] == '=' )
+ return *p + len + 1;
+ }
+ return 0;
+}
+
+
diff --git a/libc/stdlib/malloc/Makefile b/libc/stdlib/malloc/Makefile
new file mode 100644
index 000000000..36872c301
--- /dev/null
+++ b/libc/stdlib/malloc/Makefile
@@ -0,0 +1,33 @@
+# Copyright (C) 1996 Robert de Bath <robert@mayday.compulink.co.uk>
+# This file is part of the Linux-8086 C library and is distributed
+# under the GNU Library General Public License.
+
+LIBC=../libc.a
+
+CC=m68k-pic-coff-gcc
+AR=m68k-pic-coff-ar
+RANLIB=m68k-pic-coff-ranlib
+
+CCFLAGS= -O2 -m68000 -msoft-float -I../include
+
+
+MSRC=alloc.c
+MOBJ=malloc.o free.o calloc.o malloc_dbg.o free_dbg.o calloc_dbg.o
+
+OBJ=$(MOBJ)
+
+CFLAGS=$(ARCH) $(CCFLAGS) $(DEFS)
+
+all: $(LIBC)
+ @$(RM) $(OBJ)
+
+$(LIBC): $(LIBC)($(OBJ))
+
+$(LIBC)($(MOBJ)): $(MSRC)
+ $(CC) $(CFLAGS) -DL_$* $< -c -o $*.o
+ $(AR) $(ARFLAGS) $@ $*.o
+
+clean:
+ rm -f *.o libc.a
+
+
diff --git a/libc/stdlib/malloc/alloc.c b/libc/stdlib/malloc/alloc.c
new file mode 100644
index 000000000..b92cb7c69
--- /dev/null
+++ b/libc/stdlib/malloc/alloc.c
@@ -0,0 +1,82 @@
+#include <unistd.h>
+#include <sys/mman.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#ifdef L_calloc_dbg
+
+void *
+calloc_dbg(size_t num, size_t size, char * function, char * file, int line)
+{
+ void * ptr;
+ fprintf(stderr, "calloc of %d bytes at %s @%s:%d = ", num*size, function, file, line);
+ ptr = calloc(num,size);
+ fprtinf(stderr, "%p\n", ptr);
+ return ptr;
+}
+
+#endif
+
+#ifdef L_malloc_dbg
+
+void *
+malloc_dbg(size_t len, char * function, char * file, int line)
+{
+ void * result;
+ fprintf(stderr, "malloc of %d bytes at %s @%s:%d = ", len, function, file, line);
+ result = malloc(len);
+ fprintf(stderr, "%p\n", result);
+ return result;
+}
+
+#endif
+
+#ifdef L_free_dbg
+
+void
+free_dbg(void * ptr, char * function, char * file, int line)
+{
+ fprintf(stderr, "free of %p at %s @%s:%d\n", ptr, function, file, line);
+ free(ptr);
+}
+
+#endif
+
+
+#ifdef L_calloc
+
+void *
+calloc(size_t num, size_t size)
+{
+ void * ptr = malloc(num*size);
+ if (ptr)
+ memset(ptr, 0, num*size);
+ return ptr;
+}
+
+#endif
+
+#ifdef L_malloc
+
+void *
+malloc(size_t len)
+{
+ void * result = mmap((void *)0, len, PROT_READ | PROT_WRITE,
+ MAP_SHARED | MAP_ANONYMOUS, 0, 0);
+ if (result == (void*)-1)
+ return 0;
+
+ return result;
+}
+
+#endif
+
+#ifdef L_free
+
+void
+free(void * ptr)
+{
+ munmap(ptr, 0);
+}
+
+#endif
diff --git a/libc/stdlib/mkstemp.c b/libc/stdlib/mkstemp.c
new file mode 100644
index 000000000..d65ada4f7
--- /dev/null
+++ b/libc/stdlib/mkstemp.c
@@ -0,0 +1,43 @@
+
+#include <features.h>
+#include <unistd.h>
+#include <fcntl.h>
+
+int mkstemp(template)
+char * template;
+{
+ int i;
+ int num; /* UNINITIALIZED */
+ int n2;
+ int l = strlen(template);
+
+ if (l<6) {
+ errno = EINVAL;
+ return -1;
+ }
+
+ for(i=l-6;i<l;i++)
+ if (template[i] != 'X') {
+ errno = EINVAL;
+ return -1;
+ }
+
+again:
+ n2 = num;
+ for(i=l-1;i>=l-6;i--) {
+ template[i] = '0' + n2 % 10;
+ n2 /= 10;
+ }
+
+ i = open(template, O_RDWR|O_EXCL|O_CREAT, 0666);
+
+ if (i==-1) {
+ if (errno == EEXIST) {
+ num++;
+ goto again;
+ } else
+ return -1;
+ }
+
+ return i;
+}
diff --git a/libc/stdlib/mktemp.c b/libc/stdlib/mktemp.c
new file mode 100644
index 000000000..08b356710
--- /dev/null
+++ b/libc/stdlib/mktemp.c
@@ -0,0 +1,40 @@
+
+#include <features.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/stat.h>
+
+char * mktemp(template)
+char * template;
+{
+ int i;
+ int num; /* UNINITIALIZED */
+ int n2;
+ int l = strlen(template);
+ struct stat stbuf;
+
+ if (l<6) {
+ errno = EINVAL;
+ return 0;
+ }
+
+ for(i=l-6;i<l;i++)
+ if (template[i] != 'X') {
+ errno = EINVAL;
+ return 0;
+ }
+
+again:
+ n2 = num;
+ for(i=l-1;i>=l-6;i--) {
+ template[i] = '0' + n2 % 10;
+ n2 /= 10;
+ }
+
+ if (stat(template, &stbuf) == 0) {
+ num++;
+ goto again;
+ }
+
+ return template;
+}
diff --git a/libc/stdlib/putenv.c b/libc/stdlib/putenv.c
new file mode 100644
index 000000000..a7a453d5f
--- /dev/null
+++ b/libc/stdlib/putenv.c
@@ -0,0 +1,62 @@
+/* Copyright (C) 1995,1996 Robert de Bath <rdebath@cix.compulink.co.uk>
+ * This file is part of the Linux-8086 C library and is distributed
+ * under the GNU Library General Public License.
+ */
+#include <string.h>
+#include <stdlib.h>
+#include <malloc.h>
+
+extern char ** environ;
+#define ADD_NUM 4
+
+int
+putenv(var)
+const char * var;
+{
+static char ** mall_env = 0;
+static int extras = 0;
+ char **p, **d;
+ char * r;
+ int len;
+
+ r = strchr(var, '=');
+ if( r == 0 ) len = strlen(var);
+ else len = r-var;
+
+ if (!environ) {
+ environ = (char**)malloc(ADD_NUM * sizeof(char*));
+ memset(environ, 0, sizeof(char*)*ADD_NUM);
+ extras = ADD_NUM;
+ }
+
+ for(p=environ; *p; p++)
+ {
+ if( memcmp(var, *p, len) == 0 && (*p)[len] == '=' )
+ {
+ while( p[0] = p[1] ) p++;
+ extras++;
+ break;
+ }
+ }
+ if( r == 0 ) return 0;
+ if( extras <= 0 ) /* Need more space */
+ {
+ d = malloc((p-environ+1+ADD_NUM)*sizeof(char*));
+ if( d == 0 ) return -1;
+
+ memcpy((void*) d, (void*) environ, (p-environ+1)*sizeof(char*));
+ p = d + (p-environ);
+ extras=ADD_NUM;
+
+ if( mall_env ) free(mall_env);
+ environ = d;
+ mall_env = d;
+ }
+ *p++ = strdup((char*)var);
+ *p = '\0';
+ extras--;
+
+ return 0;
+}
+
+
diff --git a/libc/stdlib/qsort.c b/libc/stdlib/qsort.c
new file mode 100644
index 000000000..cee53c398
--- /dev/null
+++ b/libc/stdlib/qsort.c
@@ -0,0 +1,166 @@
+/*
+ * This file lifted in toto from 'Dlibs' on the atari ST (RdeBath)
+ *
+ *
+ * Dale Schumacher 399 Beacon Ave.
+ * (alias: Dalnefre') St. Paul, MN 55104
+ * dal@syntel.UUCP United States of America
+ * "It's not reality that's important, but how you perceive things."
+ */
+#include <string.h>
+
+char *_qbuf = 0; /* pointer to storage for qsort() */
+
+#define PIVOT ((i+j)>>1)
+#define moveitem(dst,src,size) if(dst != src) memcpy(dst, src, size)
+
+static
+_wqsort(base, lo, hi, cmp)
+register int *base;
+register int lo;
+register int hi;
+register int (*cmp) ();
+{
+ int k;
+ register int i, j, t;
+ register int *p = &k;
+
+ while (hi > lo)
+ {
+ i = lo;
+ j = hi;
+ t = PIVOT;
+ *p = base[t];
+ base[t] = base[i];
+ base[i] = *p;
+ while (i < j)
+ {
+ while (((*cmp) ((base + j), p)) > 0)
+ --j;
+ base[i] = base[j];
+ while ((i < j) && (((*cmp) ((base + i), p)) <= 0))
+ ++i;
+ base[j] = base[i];
+ }
+ base[i] = *p;
+ if ((i - lo) < (hi - i))
+ {
+ _wqsort(base, lo, (i - 1), cmp);
+ lo = i + 1;
+ }
+ else
+ {
+ _wqsort(base, (i + 1), hi, cmp);
+ hi = i - 1;
+ }
+ }
+}
+
+static
+_lqsort(base, lo, hi, cmp)
+register long *base;
+register int lo;
+register int hi;
+register int (*cmp) ();
+{
+ long k;
+ register int i, j, t;
+ register long *p = &k;
+
+ while (hi > lo)
+ {
+ i = lo;
+ j = hi;
+ t = PIVOT;
+ *p = base[t];
+ base[t] = base[i];
+ base[i] = *p;
+ while (i < j)
+ {
+ while (((*cmp) ((base + j), p)) > 0)
+ --j;
+ base[i] = base[j];
+ while ((i < j) && (((*cmp) ((base + i), p)) <= 0))
+ ++i;
+ base[j] = base[i];
+ }
+ base[i] = *p;
+ if ((i - lo) < (hi - i))
+ {
+ _lqsort(base, lo, (i - 1), cmp);
+ lo = i + 1;
+ }
+ else
+ {
+ _lqsort(base, (i + 1), hi, cmp);
+ hi = i - 1;
+ }
+ }
+}
+
+static
+_nqsort(base, lo, hi, size, cmp)
+register char *base;
+register int lo;
+register int hi;
+register int size;
+register int (*cmp) ();
+{
+ register int i, j;
+ register char *p = _qbuf;
+
+ while (hi > lo)
+ {
+ i = lo;
+ j = hi;
+ p = (base + size * PIVOT);
+ moveitem(_qbuf, p, size);
+ moveitem(p, (base + size * i), size);
+ moveitem((base + size * i), _qbuf, size);
+ p = _qbuf;
+ while (i < j)
+ {
+ while (((*cmp) ((base + size * j), p)) > 0)
+ --j;
+ moveitem((base + size * i), (base + size * j), size);
+ while ((i < j) && (((*cmp) ((base + size * i), p)) <= 0))
+ ++i;
+ moveitem((base + size * j), (base + size * i), size);
+ }
+ moveitem((base + size * i), p, size);
+ if ((i - lo) < (hi - i))
+ {
+ _nqsort(base, lo, (i - 1), size, cmp);
+ lo = i + 1;
+ }
+ else
+ {
+ _nqsort(base, (i + 1), hi, size, cmp);
+ hi = i - 1;
+ }
+ }
+}
+
+qsort(base, num, size, cmp)
+char *base;
+int num;
+int size;
+int (*cmp) ();
+{
+ char _qtemp[128];
+
+ if (_qbuf == 0)
+ {
+ if (size > sizeof(_qtemp))/* records too large! */
+ return;
+ _qbuf = _qtemp;
+ }
+ if (size == 2)
+ _wqsort(base, 0, num - 1, cmp);
+ else if (size == 4)
+ _lqsort(base, 0, num - 1, cmp);
+ else
+ _nqsort(base, 0, num - 1, size, cmp);
+ if (_qbuf == _qtemp)
+ _qbuf = 0;
+}
diff --git a/libc/stdlib/rand.c b/libc/stdlib/rand.c
new file mode 100644
index 000000000..4eb07894b
--- /dev/null
+++ b/libc/stdlib/rand.c
@@ -0,0 +1,61 @@
+#ifdef ZX81_RNG
+/*
+ * This is my favorite tiny RNG, If you had a ZX81 you may recognise it :-)
+ * (RdeBath)
+ */
+
+#include <stdlib.h>
+
+#define MAXINT (((unsigned)-1)>>1)
+
+static unsigned int sseed = 0;
+
+int rand()
+{
+ return ( sseed = (((sseed+1L)*75L)%65537L)-1 ) & MAXINT;
+}
+
+void srand(seed)
+unsigned int seed;
+{
+ sseed=seed;
+}
+
+#else
+
+/*
+ * This generator is a combination of three linear congruential generators
+ * with periods or 2^15-405, 2^15-1041 and 2^15-1111. It has a period that
+ * is the product of these three numbers.
+ */
+
+static int seed1 = 1;
+static int seed2 = 1;
+static int seed3 = 1;
+#define MAXINT (((unsigned)-1)>>1)
+
+#define CRANK(a,b,c,m,s) \
+ q = s/a; \
+ s = b*(s-a*q) - c*q; \
+ if(s<0) s+=m;
+
+int rand()
+{
+ register int q, z;
+ CRANK(206, 157, 31, 32363, seed1);
+ CRANK(217, 146, 45, 31727, seed2);
+ CRANK(222, 142, 133, 31657, seed3);
+
+ return seed1^seed2^seed3;
+}
+
+void srand(seed)
+unsigned int seed;
+{
+ seed &= MAXINT;
+ seed1= seed%32362 + 1;
+ seed2= seed%31726 + 1;
+ seed3= seed%31656 + 1;
+}
+
+#endif
diff --git a/libc/stdlib/setenv.c b/libc/stdlib/setenv.c
new file mode 100644
index 000000000..0990fdec2
--- /dev/null
+++ b/libc/stdlib/setenv.c
@@ -0,0 +1,73 @@
+/* Copyright (C) 1995,1996 Robert de Bath <rdebath@cix.compulink.co.uk>
+ * This file is part of the Linux-8086 C library and is distributed
+ * under the GNU Library General Public License.
+ */
+#include <string.h>
+#include <stdlib.h>
+#include <malloc.h>
+
+extern char ** environ;
+#define ADD_NUM 4
+
+int
+setenv(var, value, overwrite)
+const char * var;
+const char * value;
+int overwrite;
+{
+static char ** mall_env = 0;
+static int extras = 0;
+ char **p, **d;
+ char * t;
+ int len;
+
+ len = strlen(var);
+
+ if (!environ) {
+ environ = (char**)malloc(ADD_NUM * sizeof(char*));
+ memset(environ, 0, sizeof(char*)*ADD_NUM);
+ extras = ADD_NUM;
+ }
+
+ for(p=environ; *p; p++)
+ {
+ if( memcmp(var, *p, len) == 0 && (*p)[len] == '=' )
+ {
+ if (!overwrite)
+ return -1;
+ while( p[0] = p[1] ) p++;
+ extras++;
+ break;
+ }
+ }
+
+ if( extras <= 0 ) /* Need more space */
+ {
+ d = malloc((p-environ+1+ADD_NUM)*sizeof(char*));
+ if( d == 0 ) return -1;
+
+ memcpy((void*) d, (void*) environ, (p-environ+1)*sizeof(char*));
+ p = d + (p-environ);
+ extras=ADD_NUM;
+
+ if( mall_env ) free(mall_env);
+ environ = d;
+ mall_env = d;
+ }
+
+ t = malloc(len + 1 + strlen(value) + 1);
+ if (!t)
+ return -1;
+
+ strcpy(t, var);
+ strcat(t, "=");
+ strcat(t, value);
+
+ *p++ = (char*)t;
+ *p = '\0';
+ extras--;
+
+ return 0;
+}
+
+
diff --git a/libc/stdlib/strtod.c b/libc/stdlib/strtod.c
new file mode 100644
index 000000000..0d3bb790a
--- /dev/null
+++ b/libc/stdlib/strtod.c
@@ -0,0 +1,96 @@
+/*
+ * strtod.c - This file is part of the libc-8086 package for ELKS,
+ * Copyright (C) 1995, 1996 Nat Friedman <ndf@linux.mit.edu>.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the Free
+ * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ */
+#include <stdlib.h>
+#include <ctype.h>
+
+float
+strtod(const char *nptr, char ** endptr)
+{
+ unsigned short negative;
+ float number;
+ float fp_part;
+ int exponent;
+ unsigned short exp_negative;
+
+ /* advance beyond any leading whitespace */
+ while (isspace(*nptr))
+ nptr++;
+
+ /* check for optional '+' or '-' */
+ negative=0;
+ if (*nptr=='-')
+ {
+ negative=1;
+ nptr++;
+ }
+ else
+ if (*nptr=='+')
+ nptr++;
+
+ number=0;
+ while (isdigit(*nptr))
+ {
+ number=number*10+(*nptr-'0');
+ nptr++;
+ }
+
+ if (*nptr=='.')
+ {
+ nptr++;
+ fp_part=0;
+ while (isdigit(*nptr))
+ {
+ fp_part=fp_part/10.0 + (*nptr-'0')/10.0;
+ nptr++;
+ }
+ number+=fp_part;
+ }
+
+ if (*nptr=='e' || *nptr=='E')
+ {
+ nptr++;
+ exp_negative=0;
+ if (*nptr=='-')
+ {
+ exp_negative=1;
+ nptr++;
+ }
+ else
+ if (*nptr=='+')
+ nptr++;
+
+ exponent=0;
+ while (isdigit(*nptr))
+ {
+ exponent=exponent*10+(*nptr-'0');
+ exponent++;
+ }
+ }
+
+ while (exponent)
+ {
+ if (exp_negative)
+ number/=10;
+ else
+ number*=10;
+ exponent--;
+ }
+ return (negative ? -number:number);
+}
diff --git a/libc/stdlib/system.c b/libc/stdlib/system.c
new file mode 100644
index 000000000..b764613be
--- /dev/null
+++ b/libc/stdlib/system.c
@@ -0,0 +1,48 @@
+
+#include <stddef.h>
+#include <signal.h>
+#include <unistd.h>
+
+int
+system(command)
+char * command;
+{
+ int wait_val, wait_ret, pid;
+ __sighandler_t save_quit, save_int, save_chld;
+
+ if( command == 0 ) return 1;
+
+ save_quit = signal(SIGQUIT, SIG_IGN);
+ save_int = signal(SIGINT, SIG_IGN);
+ save_chld = signal(SIGCHLD, SIG_DFL);
+
+ if( (pid=vfork()) < 0 )
+ {
+ signal(SIGQUIT, save_quit);
+ signal(SIGINT, save_int);
+ signal(SIGCHLD, save_chld);
+ return -1;
+ }
+ if( pid == 0 )
+ {
+ signal(SIGQUIT, SIG_DFL);
+ signal(SIGINT, SIG_DFL);
+ signal(SIGCHLD, SIG_DFL);
+
+ execl("/bin/sh", "sh", "-c", command, (char*)0);
+ _exit(127);
+ }
+ /* Signals are not absolutly guarenteed with vfork */
+ signal(SIGQUIT, SIG_IGN);
+ signal(SIGINT, SIG_IGN);
+
+ printf("Waiting for child %d\n", pid);
+
+ if (wait4(pid, &wait_val, 0, 0) == -1)
+ wait_val = -1;
+
+ signal(SIGQUIT, save_quit);
+ signal(SIGINT, save_int);
+ signal(SIGCHLD, save_chld);
+ return wait_val;
+}
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