klibc is not thread-safe. Consequently, clone() or any of the
pthreads functions are not included.
+
+bsd_signal vs sysv_signal:
+--------------------------
+
+There is no signal() call, because you never know if you want
+Linux/SysV semantics (SA_RESETHAND) or GNU/BSD semantics (SA_RESTART).
+The best, in *any* circumstances, is to never use signal() and instead
+use sigaction(), but in order to simplify porting you can use either
+sysv_signal() or bsd_signal(), depending on what you actually want.
+
SRCROOT = ..
include ../MCONFIG
+include ../MRULES
WARNFLAGS = -W -Wall -Wpointer-arith -Wwrite-strings -Wstrict-prototypes -Winline
CFLAGS = -Wp,-MD,$(dir $*).$(notdir $*).d $(OPTFLAGS) $(REQFLAGS) $(WARNFLAGS)
SOFLAGS = -fPIC
-
-.SUFFIXES: .c .o .a .so .lo .i .S .s .ls .ss .lss
-
-.c.o:
- $(CC) $(CFLAGS) -c -o $@ $<
-
-.c.i:
- $(CC) $(CFLAGS) -E -o $@ $<
-
-.c.s:
- $(CC) $(CFLAGS) -S -o $@ $<
-
-.S.o:
- $(CC) $(CFLAGS) -D__ASSEMBLY__ -c -o $@ $<
-
-.S.s:
- $(CC) $(CFLAGS) -D__ASSEMBLY__ -E -o $@ $<
-
-.S.lo:
- $(CC) $(CFLAGS) $(SOFLAGS) -D__ASSEMBLY__ -c -o $@ $<
-
-.S.ls:
- $(CC) $(CFLAGS) $(SOFLAGS) -D__ASSEMBLY__ -E -o $@ $<
-
-.s.o:
- $(CC) $(CFLAGS) -x assembler -c -o $@ $<
-
-.ls.lo:
- $(CC) $(CFLAGS) $(SOFLAGS) -x assembler -c -o $@ $<
-
-.c.lo:
- $(CC) $(CFLAGS) $(SOFLAGS) -c -o $@ $<
-
-.c.ls:
- $(CC) $(CFLAGS) $(SOFLAGS) -S -o $@ $<
-
-
fopen.o fread.o fread2.o fgetc.o fgets.o \
fwrite.o fwrite2.o fputc.o fputs.o puts.o \
sleep.o usleep.o raise.o abort.o assert.o alarm.o pause.o \
- __signal.o signal.o bsd_signal.o siglist.o siglongjmp.o \
+ __signal.o sysv_signal.o bsd_signal.o siglist.o siglongjmp.o \
sigaction.o sigpending.o sigprocmask.o sigsuspend.o \
brk.o sbrk.o malloc.o realloc.o calloc.o mmap.o getpagesize.o \
memcpy.o memcmp.o memset.o memccpy.o memmem.o memswap.o \
strsep.o strtok.o \
gethostname.o getdomainname.o getcwd.o \
seteuid.o setegid.o setresuid.o setresgid.o \
- getenv.o setenv.o unsetenv.o getopt.o readdir.o \
+ getenv.o setenv.o putenv.o __put_env.o unsetenv.o \
+ getopt.o readdir.o \
syslog.o closelog.o pty.o isatty.o reboot.o \
time.o utime.o fdatasync.o llseek.o select.o nice.o getpriority.o \
qsort.o lrand48.o srand48.o seed48.o \
a) In the source root directory (the directory above the one in which
this file is found) create a symlink called "linux" pointing to a
- reasonably recent Linux kernel tree (2.4 or 2.5 should be OK.)
+ reasonably recent Linux kernel tree (2.4 or 2.6 should be OK.)
This tree must have the include/asm symlink set up for the
architecture you're compiling for, and include/linux/autoconf.h
must exist. The easiest way to make sure of all of these is to do
a "make config" or any of its variants on the kernel tree is
- question, followed by a "make dep".
+ question, followed by a "make dep" (2.4) or "make prepare" (2.6).
b) If you're cross-compiling, change ARCH in the main MCONFIG file to
the appropriate architecture, and set CROSS to your toolchain
The following is the last known status of various architectures:
- Known to work: alpha arm ia64 i386 s390 s390x sparc
+ Known to work: alpha arm ia64 i386 ppc s390 s390x sparc
sparc64 x86_64*
Works static, not shared: mips* arm-thumb sh*
- Might work: ppc ppc64
+ Might work: ppc64
Need porting work: cris m68k mips64 parisc
x86_64: requires a kernel header patch (to be created)
mips, sh: linker problem; might work with fixed linker
- Shared library support for sparc/sparc64 requires binutils 2.13.90.0.4.
+ Shared library support requires binutils 2.13.90.0.4 or later on
+ many architectures.
Note that even the "known to work" ones likely have bugs. Please
report them if you run into them.
d) Try the test programs in the tests/ directory. They should run...
-Contact me at <hpa@zytor.com> for more info.
+Contact the klibc mailing list:
+
+ http://www.zytor.com/mailman/listinfo/klibc
+
+... for more info.
-hpa
--- /dev/null
+/*
+ * __put_env.c - common code for putenv() and setenv()
+ */
+
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+/* Initialized to zero, meaning "not malloc'd" */
+static size_t __environ_size;
+
+/* str should be a duplicated version of the input string;
+ len is the length of the key including the = sign */
+int __put_env(char *str, size_t len, int overwrite)
+{
+ char **p, *q;
+ char **newenv;
+ size_t n;
+
+ n = 1; /* Include space for final NULL */
+ for ( p = environ ; (q = *p) ; p++ ) {
+ n++;
+ if ( !strncmp(q,str,len) ) {
+ if ( !overwrite )
+ free(str);
+ else
+ *p = str; /* Possible memory leak... */
+ return 0;
+ }
+ }
+
+ /* Need to extend the environment */
+ if ( n < __environ_size ) {
+ p[1] = NULL;
+ *p = str;
+ return 0;
+ } else {
+ if ( __environ_size ) {
+ newenv = realloc(environ, (__environ_size << 1)*sizeof(char *));
+ if ( !newenv )
+ return -1;
+
+ __environ_size <<= 1;
+ } else {
+ /* Make a reasonable guess how much more space we need */
+ size_t newsize = n+32;
+ newenv = malloc(newsize*sizeof(char *));
+ if ( !newenv )
+ return -1;
+
+ memcpy(newenv, environ, n*sizeof(char *));
+ __environ_size = newsize;
+ }
+ newenv[n-1] = str; /* Old NULL position */
+ newenv[n] = NULL;
+ environ = newenv;
+ }
+ return 0;
+}
#ifndef _KLIBC_ARCHSYS_H
#define _KLIBC_ARCHSYS_H
-/* x86-64 seems to miss _syscall6() from its headers */
+/* The x86-64 syscall headers are needlessly inefficient */
-#ifndef _syscall6
+#undef _syscall0
+#undef _syscall1
+#undef _syscall2
+#undef _syscall3
+#undef _syscall4
+#undef _syscall5
+#undef _syscall6
+
+#define _syscall0(type,name) \
+type name (void) \
+{ \
+long __res; \
+__asm__ volatile (__syscall \
+ : "=a" (__res) \
+ : "0" (__NR_##name) \
+ : __syscall_clobber); \
+__syscall_return(type,__res); \
+}
+
+#define _syscall1(type,name,type1,arg1) \
+type name (type1 arg1) \
+{ \
+long __res; \
+__asm__ volatile (__syscall \
+ : "=a" (__res) \
+ : "0" (__NR_##name),"D" (arg1) \
+ : __syscall_clobber); \
+__syscall_return(type,__res); \
+}
+
+#define _syscall2(type,name,type1,arg1,type2,arg2) \
+type name (type1 arg1,type2 arg2) \
+{ \
+long __res; \
+__asm__ volatile (__syscall \
+ : "=a" (__res) \
+ : "0" (__NR_##name),"D" (arg1),"S" (arg2) \
+ : __syscall_clobber); \
+__syscall_return(type,__res); \
+}
+
+#define _syscall3(type,name,type1,arg1,type2,arg2,type3,arg3) \
+type name (type1 arg1,type2 arg2,type3 arg3) \
+{ \
+long __res; \
+__asm__ volatile (__syscall \
+ : "=a" (__res) \
+ : "0" (__NR_##name),"D" (arg1),"S" (arg2), \
+ "d" (arg3) \
+ : __syscall_clobber); \
+__syscall_return(type,__res); \
+}
+
+#define _syscall4(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4) \
+type name (type1 arg1,type2 arg2,type3 arg3,type4 arg4) \
+{ \
+long __res; \
+register type4 __r10 asm("%r10") = arg4; \
+__asm__ volatile (__syscall \
+ : "=a" (__res) \
+ : "0" (__NR_##name),"D" (arg1),"S" (arg2), \
+ "d" (arg3),"r" (__r10) \
+ : __syscall_clobber); \
+__syscall_return(type,__res); \
+}
+
+#define _syscall5(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4, \
+ type5,arg5) \
+type name (type1 arg1,type2 arg2,type3 arg3,type4 arg4,type5 arg5) \
+{ \
+long __res; \
+register type4 __r10 asm("%r10") = arg4; \
+register type5 __r8 asm("%r8") = arg5; \
+__asm__ volatile (__syscall \
+ : "=a" (__res) \
+ : "0" (__NR_##name),"D" (arg1),"S" (arg2), \
+ "d" (arg3),"r" (__r10),"r" (__r8) \
+ : __syscall_clobber); \
+__syscall_return(type,__res); \
+}
#define _syscall6(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4, \
type5,arg5,type6,arg6) \
__syscall_return(type,__res); \
}
-#endif /* _syscall6 missing */
-
#endif /* _KLIBC_ARCHSYS_H */
#ifndef _ELF_H
#define _ELF_H
-#include <sys/types.h>
-#include <linux/elf.h>
+#include <sys/elf32.h>
+#include <sys/elf64.h>
#endif /* _ELF_H */
}
__extern __sighandler_t __signal(int, __sighandler_t, int);
-__extern __sighandler_t signal(int, __sighandler_t);
+__extern __sighandler_t sysv_signal(int, __sighandler_t);
__extern __sighandler_t bsd_signal(int, __sighandler_t);
__extern int sigaction(int, const struct sigaction *, struct sigaction *);
__extern int sigprocmask(int, const sigset_t *, sigset_t *);
#endif
+/* Keep the kernel from trying to define these types... */
+#define __BIT_TYPES_DEFINED__
+
#endif /* _STDINT_H */
--- /dev/null
+/*
+ * sys/elf32.h
+ */
+
+#ifndef _SYS_ELF32_H
+#define _SYS_ELF32_H
+
+#include <sys/elfcommon.h>
+
+/* ELF standard typedefs (yet more proof that <stdint.h> was way overdue) */
+typedef uint16_t Elf32_Half;
+typedef int16_t Elf32_SHalf;
+typedef uint32_t Elf32_Word;
+typedef int32_t Elf32_Sword;
+typedef uint64_t Elf32_Xword;
+typedef int64_t Elf32_Sxword;
+
+typedef uint32_t Elf32_Off;
+typedef uint32_t Elf32_Addr;
+typedef uint16_t Elf32_Section;
+
+/* Dynamic header */
+
+typedef struct elf32_dyn {
+ Elf32_Sword d_tag;
+ union{
+ Elf32_Sword d_val;
+ Elf32_Addr d_ptr;
+ } d_un;
+} Elf32_Dyn;
+
+/* Relocations */
+
+#define ELF32_R_SYM(x) ((x) >> 8)
+#define ELF32_R_TYPE(x) ((x) & 0xff)
+
+typedef struct elf32_rel {
+ Elf32_Addr r_offset;
+ Elf32_Word r_info;
+} Elf32_Rel;
+
+typedef struct elf32_rela {
+ Elf32_Addr r_offset;
+ Elf32_Word r_info;
+ Elf32_Sword r_addend;
+} Elf32_Rela;
+
+/* Symbol */
+
+typedef struct elf32_sym {
+ Elf32_Word st_name;
+ Elf32_Addr st_value;
+ Elf32_Word st_size;
+ unsigned char st_info;
+ unsigned char st_other;
+ Elf32_Half st_shndx;
+} Elf32_Sym;
+
+/* Main file header */
+
+typedef struct elf32_hdr {
+ unsigned char e_ident[EI_NIDENT];
+ Elf32_Half e_type;
+ Elf32_Half e_machine;
+ Elf32_Word e_version;
+ Elf32_Addr e_entry;
+ Elf32_Off e_phoff;
+ Elf32_Off e_shoff;
+ Elf32_Word e_flags;
+ Elf32_Half e_ehsize;
+ Elf32_Half e_phentsize;
+ Elf32_Half e_phnum;
+ Elf32_Half e_shentsize;
+ Elf32_Half e_shnum;
+ Elf32_Half e_shstrndx;
+} Elf32_Ehdr;
+
+/* Program header */
+
+typedef struct elf32_phdr {
+ Elf32_Word p_type;
+ Elf32_Off p_offset;
+ Elf32_Addr p_vaddr;
+ Elf32_Addr p_paddr;
+ Elf32_Word p_filesz;
+ Elf32_Word p_memsz;
+ Elf32_Word p_flags;
+ Elf32_Word p_align;
+} Elf32_Phdr;
+
+
+/* Section header */
+
+typedef struct elf32_shdr {
+ Elf32_Word sh_name;
+ Elf32_Word sh_type;
+ Elf32_Word sh_flags;
+ Elf32_Addr sh_addr;
+ Elf32_Off sh_offset;
+ Elf32_Word sh_size;
+ Elf32_Word sh_link;
+ Elf32_Word sh_info;
+ Elf32_Word sh_addralign;
+ Elf32_Word sh_entsize;
+} Elf32_Shdr;
+
+/* Note header */
+typedef struct elf32_note {
+ Elf32_Word n_namesz; /* Name size */
+ Elf32_Word n_descsz; /* Content size */
+ Elf32_Word n_type; /* Content type */
+} Elf32_Nhdr;
+
+#endif /* _SYS_ELF32_H */
+
--- /dev/null
+/*
+ * sys/elf64.h
+ */
+
+#ifndef _SYS_ELF64_H
+#define _SYS_ELF64_H
+
+#include <sys/elfcommon.h>
+
+/* ELF standard typedefs (yet more proof that <stdint.h> was way overdue) */
+typedef uint16_t Elf64_Half;
+typedef int16_t Elf64_SHalf;
+typedef uint32_t Elf64_Word;
+typedef int32_t Elf64_Sword;
+typedef uint64_t Elf64_Xword;
+typedef int64_t Elf64_Sxword;
+
+typedef uint64_t Elf64_Off;
+typedef uint64_t Elf64_Addr;
+typedef uint16_t Elf64_Section;
+
+/* Dynamic header */
+
+typedef struct elf64_dyn {
+ Elf64_Sxword d_tag;
+ union{
+ Elf64_Xword d_val;
+ Elf64_Addr d_ptr;
+ } d_un;
+} Elf64_Dyn;
+
+/* Relocations */
+
+#define ELF64_R_SYM(x) ((x) >> 32)
+#define ELF64_R_TYPE(x) ((x) & 0xffffffff)
+
+typedef struct elf64_rel {
+ Elf64_Addr r_offset;
+ Elf64_Xword r_info;
+} Elf64_Rel;
+
+typedef struct elf64_rela {
+ Elf64_Addr r_offset;
+ Elf64_Xword r_info;
+ Elf64_Sxword r_addend;
+} Elf64_Rela;
+
+/* Symbol */
+
+typedef struct elf64_sym {
+ Elf64_Word st_name;
+ unsigned char st_info;
+ unsigned char st_other;
+ Elf64_Half st_shndx;
+ Elf64_Addr st_value;
+ Elf64_Xword st_size;
+} Elf64_Sym;
+
+/* Main file header */
+
+typedef struct elf64_hdr {
+ unsigned char e_ident[EI_NIDENT];
+ Elf64_Half e_type;
+ Elf64_Half e_machine;
+ Elf64_Word e_version;
+ Elf64_Addr e_entry;
+ Elf64_Off e_phoff;
+ Elf64_Off e_shoff;
+ Elf64_Word e_flags;
+ Elf64_Half e_ehsize;
+ Elf64_Half e_phentsize;
+ Elf64_Half e_phnum;
+ Elf64_Half e_shentsize;
+ Elf64_Half e_shnum;
+ Elf64_Half e_shstrndx;
+} Elf64_Ehdr;
+
+/* Program header */
+
+typedef struct elf64_phdr {
+ Elf64_Word p_type;
+ Elf64_Word p_flags;
+ Elf64_Off p_offset;
+ Elf64_Addr p_vaddr;
+ Elf64_Addr p_paddr;
+ Elf64_Xword p_filesz;
+ Elf64_Xword p_memsz;
+ Elf64_Xword p_align;
+} Elf64_Phdr;
+
+
+/* Section header */
+
+typedef struct elf64_shdr {
+ Elf64_Word sh_name;
+ Elf64_Word sh_type;
+ Elf64_Xword sh_flags;
+ Elf64_Addr sh_addr;
+ Elf64_Off sh_offset;
+ Elf64_Xword sh_size;
+ Elf64_Word sh_link;
+ Elf64_Word sh_info;
+ Elf64_Xword sh_addralign;
+ Elf64_Xword sh_entsize;
+} Elf64_Shdr;
+
+/* Note header */
+typedef struct elf64_note {
+ Elf64_Word n_namesz; /* Name size */
+ Elf64_Word n_descsz; /* Content size */
+ Elf64_Word n_type; /* Content type */
+} Elf64_Nhdr;
+
+#endif /* _SYS_ELF64_H */
+
--- /dev/null
+/*
+ * sys/elfcommon.h
+ */
+
+#ifndef _SYS_ELFCOMMON_H
+#define _SYS_ELFCOMMON_H
+
+/* Segment types */
+#define PT_NULL 0
+#define PT_LOAD 1
+#define PT_DYNAMIC 2
+#define PT_INTERP 3
+#define PT_NOTE 4
+#define PT_SHLIB 5
+#define PT_PHDR 6
+#define PT_LOOS 0x60000000
+#define PT_HIOS 0x6fffffff
+#define PT_LOPROC 0x70000000
+#define PT_HIPROC 0x7fffffff
+#define PT_GNU_EH_FRAME 0x6474e550 /* Extension, eh? */
+
+/* ELF file types */
+#define ET_NONE 0
+#define ET_REL 1
+#define ET_EXEC 2
+#define ET_DYN 3
+#define ET_CORE 4
+#define ET_LOPROC 0xff00
+#define ET_HIPROC 0xffff
+
+/* ELF machine types */
+#define EM_NONE 0
+#define EM_M32 1
+#define EM_SPARC 2
+#define EM_386 3
+#define EM_68K 4
+#define EM_88K 5
+#define EM_486 6 /* Not used in Linux at least */
+#define EM_860 7
+#define EM_MIPS 8 /* R3k, bigendian(?) */
+#define EM_MIPS_RS4_BE 10 /* R4k BE */
+#define EM_PARISC 15
+#define EM_SPARC32PLUS 18
+#define EM_PPC 20
+#define EM_PPC64 21
+#define EM_S390 22
+#define EM_SH 42
+#define EM_SPARCV9 43 /* v9 = SPARC64 */
+#define EM_H8_300H 47
+#define EM_H8S 48
+#define EM_IA_64 50 /* Itanic */
+#define EM_X86_64 62
+#define EM_CRIS 76
+#define EM_V850 87
+#define EM_ALPHA 0x9026 /* Interrim Alpha that stuck around */
+#define EM_CYGNUS_V850 0x9080 /* Old v850 ID used by Cygnus */
+#define EM_S390_OLD 0xA390 /* Obsolete interrim value for S/390 */
+
+/* Dynamic type values */
+#define DT_NULL 0
+#define DT_NEEDED 1
+#define DT_PLTRELSZ 2
+#define DT_PLTGOT 3
+#define DT_HASH 4
+#define DT_STRTAB 5
+#define DT_SYMTAB 6
+#define DT_RELA 7
+#define DT_RELASZ 8
+#define DT_RELAENT 9
+#define DT_STRSZ 10
+#define DT_SYMENT 11
+#define DT_INIT 12
+#define DT_FINI 13
+#define DT_SONAME 14
+#define DT_RPATH 15
+#define DT_SYMBOLIC 16
+#define DT_REL 17
+#define DT_RELSZ 18
+#define DT_RELENT 19
+#define DT_PLTREL 20
+#define DT_DEBUG 21
+#define DT_TEXTREL 22
+#define DT_JMPREL 23
+#define DT_LOPROC 0x70000000
+#define DT_HIPROC 0x7fffffff
+
+/* Auxilliary table entries */
+#define AT_NULL 0 /* end of vector */
+#define AT_IGNORE 1 /* entry should be ignored */
+#define AT_EXECFD 2 /* file descriptor of program */
+#define AT_PHDR 3 /* program headers for program */
+#define AT_PHENT 4 /* size of program header entry */
+#define AT_PHNUM 5 /* number of program headers */
+#define AT_PAGESZ 6 /* system page size */
+#define AT_BASE 7 /* base address of interpreter */
+#define AT_FLAGS 8 /* flags */
+#define AT_ENTRY 9 /* entry point of program */
+#define AT_NOTELF 10 /* program is not ELF */
+#define AT_UID 11 /* real uid */
+#define AT_EUID 12 /* effective uid */
+#define AT_GID 13 /* real gid */
+#define AT_EGID 14 /* effective gid */
+#define AT_PLATFORM 15 /* string identifying CPU for optimizations */
+#define AT_HWCAP 16 /* arch dependent hints at CPU capabilities */
+#define AT_CLKTCK 17 /* frequency at which times() increments */
+/* 18..22 = ? */
+#define AT_SECURE 23 /* secure mode boolean */
+
+/* Program header permission flags */
+#define PF_X 0x1
+#define PF_W 0x2
+#define PF_R 0x4
+
+/* Section header types */
+#define SHT_NULL 0
+#define SHT_PROGBITS 1
+#define SHT_SYMTAB 2
+#define SHT_STRTAB 3
+#define SHT_RELA 4
+#define SHT_HASH 5
+#define SHT_DYNAMIC 6
+#define SHT_NOTE 7
+#define SHT_NOBITS 8
+#define SHT_REL 9
+#define SHT_SHLIB 10
+#define SHT_DYNSYM 11
+#define SHT_NUM 12
+#define SHT_LOPROC 0x70000000
+#define SHT_HIPROC 0x7fffffff
+#define SHT_LOUSER 0x80000000
+#define SHT_HIUSER 0xffffffff
+
+/* Section header flags */
+#define SHF_WRITE 0x1
+#define SHF_ALLOC 0x2
+#define SHF_EXECINSTR 0x4
+#define SHF_MASKPROC 0xf0000000
+
+/* Special section numbers */
+#define SHN_UNDEF 0
+#define SHN_LORESERVE 0xff00
+#define SHN_LOPROC 0xff00
+#define SHN_HIPROC 0xff1f
+#define SHN_ABS 0xfff1
+#define SHN_COMMON 0xfff2
+#define SHN_HIRESERVE 0xffff
+
+/* Lenght of magic at the start of a file */
+#define EI_NIDENT 16
+
+/* Magic number constants... */
+#define EI_MAG0 0 /* e_ident[] indexes */
+#define EI_MAG1 1
+#define EI_MAG2 2
+#define EI_MAG3 3
+#define EI_CLASS 4
+#define EI_DATA 5
+#define EI_VERSION 6
+#define EI_OSABI 7
+#define EI_PAD 8
+
+#define ELFMAG0 0x7f /* EI_MAG */
+#define ELFMAG1 'E'
+#define ELFMAG2 'L'
+#define ELFMAG3 'F'
+#define ELFMAG "\177ELF"
+#define SELFMAG 4
+
+#define ELFCLASSNONE 0 /* EI_CLASS */
+#define ELFCLASS32 1
+#define ELFCLASS64 2
+#define ELFCLASSNUM 3
+
+#define ELFDATANONE 0 /* e_ident[EI_DATA] */
+#define ELFDATA2LSB 1
+#define ELFDATA2MSB 2
+
+#define EV_NONE 0 /* e_version, EI_VERSION */
+#define EV_CURRENT 1
+#define EV_NUM 2
+
+#define ELFOSABI_NONE 0
+#define ELFOSABI_LINUX 3
+
+#endif /* _SYS_ELFCOMMON_H */
+
--- /dev/null
+/*
+ * sys/sysmacros.h
+ *
+ * Constructs to create and pick apart dev_t. This applies to the Linux 2.6
+ * 32-bit dev_t format.
+ */
+
+#ifndef _SYS_SYSMACROS_H
+#define _SYS_SYSMACROS_H
+
+#ifndef _SYS_TYPES_H
+# include <sys/types.h>
+#endif
+
+static __inline__ int major(dev_t __d)
+{
+ return (__d >> 8) & 0xfff;
+}
+
+static __inline__ int minor(dev_t __d)
+{
+ return (__d & 0xff) | ((__d >> 12) & 0xfff00);
+}
+
+static __inline__ dev_t makedev(int __ma, int __mi)
+{
+ return ((__ma & 0xfff) << 8) | (__mi & 0xff) | ((__mi & 0xfff00) << 12);
+}
+
+#endif /* _SYS_SYSMACROS_H */
+
#define _SYS_TIME_H
#include <klibc/extern.h>
+#include <sys/types.h>
#include <linux/time.h>
__extern int gettimeofday(struct timeval *, struct timezone *);
/*
* sys/types.h
- *
- * This is a bastardized version of linux/types.h, since that file
- * is broken w.r.t. <stdint.h> definitions.
*/
#ifndef _SYS_TYPES_H
typedef __kernel_ino_t ino_t;
typedef __kernel_mode_t mode_t;
typedef __kernel_nlink_t nlink_t;
-typedef __kernel_off_t off_t;
+typedef __kernel_off_t off_t; /* Should become __kernel_loff_t... */
typedef __kernel_pid_t pid_t;
typedef __kernel_daddr_t daddr_t;
typedef __kernel_key_t key_t;
typedef unsigned int uint;
typedef unsigned long ulong;
-#ifndef __BIT_TYPES_DEFINED__
-#define __BIT_TYPES_DEFINED__
-
-typedef __u8 u_int8_t;
-typedef __u16 u_int16_t;
-typedef __u32 u_int32_t;
-typedef __u64 u_int64_t;
-
-#endif /* !(__BIT_TYPES_DEFINED__) */
+/* Linux-specific? */
+typedef uint8_t u_int8_t;
+typedef uint16_t u_int16_t;
+typedef uint32_t u_int32_t;
+typedef uint64_t u_int64_t;
/*
* transition to 64-bit sector_t, possibly making it an option...
char f_fpack[6];
};
+/*
+ * Some apps want this in <sys/types.h>
+ */
+#include <sys/sysmacros.h>
+
#endif
#include <linux/wait.h>
+#define WEXITSTATUS(s) (((s) & 0xff00) >> 8)
+#define WTERMSIG(s) ((s) & 0x7f)
+#define WIFEXITED(s) (WTERMSIG(s) == 0)
+#define WIFSTOPPED(s) (WTERMSIG(s) == 0x7f)
+/* Ugly hack to avoid multiple evaluation of "s" */
+#define WIFSIGNALED(s) (WTERMSIG((s)+1) >= 2)
+#define WCOREDUMP(s) ((s) & 0x80)
+#define WSTOPSIG(s) WEXITSTATUS(s)
+
__extern pid_t wait(int *);
__extern pid_t waitpid(pid_t, int *, int);
__extern pid_t wait3(int *, int, struct rusage *);
__extern int getfsuid(uid_t);
__extern int setfsuid(uid_t);
+/* Macros for access() */
+#define R_OK 4 /* Read */
+#define W_OK 2 /* Write */
+#define X_OK 1 /* Execute */
+#define F_OK 0 /* Existence */
+
__extern int access(const char *, int);
__extern int link(const char *, const char *);
__extern int unlink(const char *);
--- /dev/null
+/*
+ * putenv.c
+ */
+
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+/* str should be a duplicated version of the input string;
+ len is the length of the key including the = sign */
+int __put_env(char *str, size_t len, int overwrite);
+
+int putenv(const char *str)
+{
+ char *s;
+ const char *e, *z;
+
+ if ( !str ) {
+ errno = EINVAL;
+ return -1;
+ }
+
+ e = NULL;
+ for ( z = str ; *z ; z++ ) {
+ if ( *z == '=' )
+ e = z;
+ }
+
+ if ( !e ) {
+ errno = EINVAL;
+ return -1;
+ }
+
+ s = strdup(str);
+ if ( !s )
+ return -1;
+
+ return __put_env(s, e-str, 1);
+}
#include <string.h>
#include <unistd.h>
-/* Initialized to zero, meaning "not malloc'd" */
-static size_t __environ_size;
-
/* str should be a duplicated version of the input string;
len is the length of the key including the = sign */
-static int _putenv(char *str, size_t len, int overwrite)
-{
- char **p, *q;
- char **newenv;
- size_t n;
-
- n = 1; /* Include space for final NULL */
- for ( p = environ ; (q = *p) ; p++ ) {
- n++;
- if ( !strncmp(q,str,len) ) {
- if ( overwrite )
- free(str);
- else
- *p = str; /* Memory leak... */
- return 0;
- }
- }
-
- /* Need to extend the environment */
- if ( n < __environ_size ) {
- p[1] = NULL;
- *p = str;
- return 0;
- } else {
- if ( __environ_size ) {
- newenv = realloc(environ, (__environ_size << 1)*sizeof(char *));
- if ( !newenv )
- return -1;
-
- __environ_size <<= 1;
- } else {
- /* Make a reasonable guess how much more space we need */
- size_t newsize = n+32;
- newenv = malloc(newsize*sizeof(char *));
- if ( !newenv )
- return -1;
-
- memcpy(newenv, environ, n*sizeof(char *));
- __environ_size = newsize;
- }
- newenv[n+1] = NULL;
- newenv[n] = str;
- environ = newenv;
- }
- return 0;
-}
-
-int putenv(const char *str)
-{
- char *s;
- const char *e, *z;
- size_t len;
-
- if ( !str ) {
- errno = EINVAL;
- return -1;
- }
-
- len = 0; e = NULL;
- for ( z = str ; *z ; z++ ) {
- len++;
- if ( *z == '=' )
- e = z;
- }
-
- if ( !e ) {
- errno = EINVAL;
- return -1;
- }
-
- s = strdup(str);
- if ( !s )
- return -1;
-
- return _putenv(s, len, 1);
-}
+int __put_env(char *str, size_t len, int overwrite);
int setenv(const char *name, const char *val, int overwrite)
{
memcpy(s, name, l1);
s[l1] = '=';
- memcpy(s+l1+1, val, l2);
- s[l1+l2+1] = '\0';
+ memcpy(s+l1+1, val, l2+1);
- return _putenv(s, l1+1, overwrite);
+ return __put_env(s, l1+1, overwrite);
}
/*
- * signal.c
+ * sysv_signal.c
*/
#include <signal.h>
-__sighandler_t signal(int signum, __sighandler_t handler)
+__sighandler_t sysv_signal(int signum, __sighandler_t handler)
{
/* Linux/SysV signal() semantics */
return __signal(signum, handler, SA_RESETHAND);
}
/* Test environ */
- printf("PATH = %s\n", getenv("PATH"));
- printf("HOME = %s\n", getenv("HOME"));
- printf("TERM = %s\n", getenv("TERM"));
- printf("USER = %s\n", getenv("USER"));
+ for ( i = 0 ; envp[i] ; i++ )
+ printf("%s\n", envp[i]);
return 0;
}
int n;
int fd;
- signal(SIGALRM, timeout);
+ sysv_signal(SIGALRM, timeout);
fd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
if (fd < 0)
goto Esocket;
--- /dev/null
+#include <stdlib.h>
+#include <stdio.h>
+#include <unistd.h>
+
+int main(int argc, char *argv[])
+{
+ (void)argc; (void)argv;
+
+ /* Set SETENV */
+ setenv("SETENV", "setenv", 1);
+
+ /* Set PUTENV */
+ putenv("PUTENV=putenv");
+
+ /* Print the results... */
+ printf("SETENV = %s\n", getenv("SETENV"));
+ printf("PUTENV = %s\n", getenv("PUTENV"));
+
+ /* Override tests */
+ setenv("SETENV", "setenv_good", 1);
+ putenv("PUTENV=putenv_good");
+ printf("SETENV = %s\n", getenv("SETENV"));
+ printf("PUTENV = %s\n", getenv("PUTENV"));
+
+ /* Non-override test */
+ setenv("SETENV", "setenv_bad", 0);
+ setenv("NEWENV", "newenv_good", 0);
+ printf("SETENV = %s\n", getenv("SETENV"));
+ printf("NEWENV = %s\n", getenv("NEWENV"));
+
+ /* Undef test */
+ unsetenv("SETENV");
+ unsetenv("NEWENV");
+ printf("SETENV = %s\n", getenv("SETENV"));
+ printf("NEWENV = %s\n", getenv("NEWENV"));
+
+ return 0;
+}
~ianmdlvl / elogind.git / commitdiff