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consistently use the internal name __environ for environ 

patch by Jens Gustedt.
previously, the intended policy was to use __environ in code that must
conform to the ISO C namespace requirements, and environ elsewhere.
this policy was not followed in practice anyway, making things
confusing. on top of that, Jens reported that certain combinations of
link-time optimization options were breaking with the inconsistent
references; this seems to be a compiler or linker bug, but having it
go away is a nice side effect of the changes made here.
This commit is contained in:
Rich Felker 2013-02-17 14:24:39 -05:00
parent cac872957e
commit 23ccb80fcb
3 changed files with 4 additions and 5 deletions
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1
src/internal/libc.h
View File

@ -57,7 +57,6 @@ void __synccall(void (*)(void *), void *);
int __setxid(int, int, int, int);
extern char **__environ;
#define environ __environ
#undef weak_alias
#define weak_alias(old, new) \

4
src/process/execvp.c
View File

@ -4,7 +4,7 @@
#include <errno.h>
#include <limits.h>
extern char **environ;
extern char **__environ;
int __execvpe(const char *file, char *const argv[], char *const envp[])
{
@ -45,5 +45,5 @@ int __execvpe(const char *file, char *const argv[], char *const envp[])
int execvp(const char *file, char *const argv[])
{
return __execvpe(file, argv, environ);
return __execvpe(file, argv, __environ);
}

4
src/process/system.c
View File

@ -13,7 +13,7 @@ static void dummy_0()
weak_alias(dummy_0, __acquire_ptc);
weak_alias(dummy_0, __release_ptc);
extern char **environ;
extern char **__environ;
int system(const char *cmd)
{
@ -40,7 +40,7 @@ int system(const char *cmd)
posix_spawnattr_setsigdefault(&attr, &reset);
posix_spawnattr_setflags(&attr, POSIX_SPAWN_SETSIGDEF|POSIX_SPAWN_SETSIGMASK);
ret = posix_spawn(&pid, "/bin/sh", 0, &attr,
(char *[]){"sh", "-c", (char *)cmd, 0}, environ);
(char *[]){"sh", "-c", (char *)cmd, 0}, __environ);
posix_spawnattr_destroy(&attr);
if (!ret) while (waitpid(pid, &status, 0)<0 && errno == EINTR);