diff options
Diffstat (limited to 'winsup/cygwin/environ.cc')
| -rw-r--r-- | winsup/cygwin/environ.cc | 1004 |
1 files changed, 0 insertions, 1004 deletions
diff --git a/winsup/cygwin/environ.cc b/winsup/cygwin/environ.cc deleted file mode 100644 index 2b109e226..000000000 --- a/winsup/cygwin/environ.cc +++ /dev/null @@ -1,1004 +0,0 @@ -/* environ.cc: Cygwin-adopted functions from newlib to manipulate - process's environment. - - Copyright 1997, 1998, 1999, 2000, 2001, 2002 Red Hat, Inc. - -This software is a copyrighted work licensed under the terms of the -Cygwin license. Please consult the file "CYGWIN_LICENSE" for -details. */ - -#include "winsup.h" -#include <errno.h> -#include <stdlib.h> -#include <stddef.h> -#include <ctype.h> -#include <assert.h> -#include <sys/cygwin.h> -#include <cygwin/version.h> -#include "pinfo.h" -#include "perprocess.h" -#include "security.h" -#include "fhandler.h" -#include "path.h" -#include "cygerrno.h" -#include "dtable.h" -#include "cygheap.h" -#include "registry.h" -#include "environ.h" -#include "child_info.h" - -extern BOOL allow_daemon; -extern BOOL allow_glob; -extern bool ignore_case_with_glob; -extern BOOL allow_ntea; -extern BOOL allow_smbntsec; -extern BOOL allow_winsymlinks; -extern BOOL strip_title_path; -extern int pcheck_case; -extern int subauth_id; -BOOL reset_com = FALSE; -static BOOL envcache = TRUE; - -static char **lastenviron; - -#define ENVMALLOC \ - (CYGWIN_VERSION_DLL_MAKE_COMBINED (user_data->api_major, user_data->api_minor) \ - <= CYGWIN_VERSION_DLL_MALLOC_ENV) - -#define NL(x) x, (sizeof (x) - 1) -/* List of names which are converted from dos to unix - on the way in and back again on the way out. - - PATH needs to be here because CreateProcess uses it and gdb uses - CreateProcess. HOME is here because most shells use it and would be - confused by Windows style path names. */ -static int return_MAX_PATH (const char *) {return MAX_PATH;} -static NO_COPY win_env conv_envvars[] = - { - {NL ("PATH="), NULL, NULL, cygwin_win32_to_posix_path_list, - cygwin_posix_to_win32_path_list, - cygwin_win32_to_posix_path_list_buf_size, - cygwin_posix_to_win32_path_list_buf_size}, - {NL ("HOME="), NULL, NULL, cygwin_conv_to_full_posix_path, - cygwin_conv_to_full_win32_path, return_MAX_PATH, return_MAX_PATH}, - {NL ("LD_LIBRARY_PATH="), NULL, NULL, cygwin_conv_to_full_posix_path, - cygwin_conv_to_full_win32_path, return_MAX_PATH, return_MAX_PATH}, - {NL ("TMPDIR="), NULL, NULL, cygwin_conv_to_full_posix_path, - cygwin_conv_to_full_win32_path, return_MAX_PATH, return_MAX_PATH}, - {NL ("TMP="), NULL, NULL, cygwin_conv_to_full_posix_path, - cygwin_conv_to_full_win32_path, return_MAX_PATH, return_MAX_PATH}, - {NL ("TEMP="), NULL, NULL, cygwin_conv_to_full_posix_path, - cygwin_conv_to_full_win32_path, return_MAX_PATH, return_MAX_PATH}, - {NULL, 0, NULL, NULL, NULL, NULL, 0, 0} - }; - -static unsigned char conv_start_chars[256] = {0}; - -void -win_env::add_cache (const char *in_posix, const char *in_native) -{ - MALLOC_CHECK; - posix = (char *) realloc (posix, strlen (in_posix) + 1); - strcpy (posix, in_posix); - if (in_native) - { - native = (char *) realloc (native, namelen + 1 + strlen (in_native)); - (void) strcpy (native, name); - (void) strcpy (native + namelen, in_native); - } - else - { - native = (char *) realloc (native, namelen + 1 + win32_len (in_posix)); - (void) strcpy (native, name); - towin32 (in_posix, native + namelen); - } - MALLOC_CHECK; - debug_printf ("posix %s", posix); - debug_printf ("native %s", native); -} - - -/* Check for a "special" environment variable name. *env is the pointer - to the beginning of the environment variable name. *in_posix is any - known posix value for the environment variable. Returns a pointer to - the appropriate conversion structure. */ -win_env * __stdcall -getwinenv (const char *env, const char *in_posix) -{ - if (!conv_start_chars[(unsigned char)*env]) - return NULL; - - for (int i = 0; conv_envvars[i].name != NULL; i++) - if (strncmp (env, conv_envvars[i].name, conv_envvars[i].namelen) == 0) - { - win_env * const we = conv_envvars + i; - const char *val; - if (!cur_environ () || !(val = in_posix ?: getenv (we->name))) - debug_printf ("can't set native for %s since no environ yet", - we->name); - else if (!envcache || !we->posix || strcmp (val, we->posix) != 0) - we->add_cache (val); - return we; - } - return NULL; -} - -/* Convert windows path specs to POSIX, if appropriate. - */ -static void __stdcall -posify (char **here, const char *value) -{ - char *src = *here; - win_env *conv; - - if (!(conv = getwinenv (src))) - return; - - int len = strcspn (src, "=") + 1; - - /* Turn all the items from c:<foo>;<bar> into their - mounted equivalents - if there is one. */ - - char *outenv = (char *) malloc (1 + len + conv->posix_len (value)); - memcpy (outenv, src, len); - conv->toposix (value, outenv + len); - conv->add_cache (outenv + len, *value != '/' ? value : NULL); - - debug_printf ("env var converted to %s", outenv); - *here = outenv; - free (src); - MALLOC_CHECK; -} - -/* - * my_findenv -- - * Returns pointer to value associated with name, if any, else NULL. - * Sets offset to be the offset of the name/value combination in the - * environment array, for use by setenv(3) and unsetenv(3). - * Explicitly removes '=' in argument name. - */ - -static char * __stdcall -my_findenv (const char *name, int *offset) -{ - register int len; - register char **p; - const char *c; - - c = name; - len = 0; - while (*c && *c != '=') - { - c++; - len++; - } - - for (p = cur_environ (); *p; ++p) - if (!strncmp (*p, name, len)) - if (*(c = *p + len) == '=') - { - *offset = p - cur_environ (); - return (char *) (++c); - } - MALLOC_CHECK; - return NULL; -} - -/* - * getenv -- - * Returns ptr to value associated with name, if any, else NULL. - */ - -extern "C" char * -getenv (const char *name) -{ - int offset; - - return my_findenv (name, &offset); -} - -static int __stdcall -envsize (const char * const *in_envp) -{ - const char * const *envp; - for (envp = in_envp; *envp; envp++) - continue; - return (1 + envp - in_envp) * sizeof (const char *); -} - -/* Takes similar arguments to setenv except that overwrite is - either -1, 0, or 1. 0 or 1 signify that the function should - perform similarly to setenv. Otherwise putenv is assumed. */ -static int __stdcall -_addenv (const char *name, const char *value, int overwrite) -{ - int issetenv = overwrite >= 0; - int offset; - char *p; - - unsigned int valuelen = strlen (value); - if ((p = my_findenv (name, &offset))) - { /* Already exists. */ - if (!overwrite) /* Ok to overwrite? */ - return 0; /* No. Wanted to add new value. FIXME: Right return value? */ - - /* We've found the offset into environ. If this is a setenv call and - there is room in the current environment entry then just overwrite it. - Otherwise handle this case below. */ - if (issetenv && strlen (p) >= valuelen) - { - strcpy (p, value); - return 0; - } - } - else - { /* Create new slot. */ - int sz = envsize (cur_environ ()); - int allocsz = sz + (2 * sizeof (char *)); - - offset = (sz - 1) / sizeof (char *); - - /* Allocate space for additional element plus terminating NULL. */ - if (cur_environ () == lastenviron) - lastenviron = __cygwin_environ = (char **) realloc (cur_environ (), - allocsz); - else if ((lastenviron = (char **) malloc (allocsz)) != NULL) - __cygwin_environ = (char **) memcpy ((char **) lastenviron, - __cygwin_environ, sz); - - if (!__cygwin_environ) - { -#ifdef DEBUGGING - try_to_debug (); -#endif - return -1; /* Oops. No more memory. */ - } - - __cygwin_environ[offset + 1] = NULL; /* NULL terminate. */ - update_envptrs (); /* Update any local copies of 'environ'. */ - } - - char *envhere; - if (!issetenv) - /* Not setenv. Just overwrite existing. */ - envhere = cur_environ ()[offset] = (char *) (ENVMALLOC ? strdup (name) : name); - else - { /* setenv */ - /* Look for an '=' in the name and ignore anything after that if found. */ - for (p = (char *) name; *p && *p != '='; p++) - continue; - - int namelen = p - name; /* Length of name. */ - /* Allocate enough space for name + '=' + value + '\0' */ - envhere = cur_environ ()[offset] = (char *) malloc (namelen + valuelen + 2); - if (!envhere) - return -1; /* Oops. No more memory. */ - - /* Put name '=' value into current slot. */ - strncpy (envhere, name, namelen); - envhere[namelen] = '='; - strcpy (envhere + namelen + 1, value); - } - - /* Update cygwin's cache, if appropriate */ - win_env *spenv; - if ((spenv = getwinenv (envhere))) - spenv->add_cache (value); - - MALLOC_CHECK; - return 0; -} - -/* putenv Sets an environment variable */ -extern "C" int -putenv (const char *str) -{ - int res; - if ((res = check_null_empty_str (str))) - { - if (res == ENOENT) - return 0; - set_errno (res); - return -1; - } - char *eq = strchr (str, '='); - if (eq) - return _addenv (str, eq + 1, -1); - - /* Remove str from the environment. */ - unsetenv (str); - return 0; -} - -/* setenv -- Set the value of the environment variable "name" to be - "value". If overwrite is set, replace any current value. */ -extern "C" int -setenv (const char *name, const char *value, int overwrite) -{ - int res; - if ((res = check_null_empty_str (value)) == EFAULT) - { - set_errno (res); - return -1; - } - if ((res = check_null_empty_str (name))) - { - if (res == ENOENT) - return 0; - set_errno (res); - return -1; - } - if (*value == '=') - value++; - return _addenv (name, value, !!overwrite); -} - -/* unsetenv(name) -- Delete environment variable "name". */ -extern "C" void -unsetenv (const char *name) -{ - register char **e; - int offset; - - while (my_findenv (name, &offset)) /* if set multiple times */ - /* Move up the rest of the array */ - for (e = cur_environ () + offset; ; e++) - if (!(*e = *(e + 1))) - break; -} - -/* Turn environment variable part of a=b string into uppercase. */ -static __inline__ void -ucenv (char *p, char *eq) -{ - /* Amazingly, NT has a case sensitive environment name list, - but only sometimes. - It's normal to have NT set your "Path" to something. - Later, you set "PATH" to something else. This alters "Path". - But if you try and do a naive getenv on "PATH" you'll get nothing. - - So we upper case the labels here to prevent confusion later but - we only do it for the first process in a session group. */ - for (; p < eq; p++) - if (islower (*p)) - *p = cyg_toupper (*p); -} - -/* Parse CYGWIN options */ - -static NO_COPY BOOL export_settings = false; - -enum settings - { - justset, - isfunc, - setbit, - set_process_state, - }; - -/* When BUF is: - null or empty: disables globbing - "ignorecase": enables case-insensitive globbing - anything else: enables case-sensitive globbing */ -static void -glob_init (const char *buf) -{ - if (!buf || !*buf) - { - allow_glob = FALSE; - ignore_case_with_glob = FALSE; - } - else if (strncasematch (buf, "ignorecase", 10)) - { - allow_glob = TRUE; - ignore_case_with_glob = TRUE; - } - else - { - allow_glob = TRUE; - ignore_case_with_glob = FALSE; - } -} - -static void -check_case_init (const char *buf) -{ - if (!buf || !*buf) - return; - - if (strncmp (buf, "relax", 5)== 0) - { - pcheck_case = PCHECK_RELAXED; - debug_printf ("File case checking set to RELAXED"); - } - else if (strcasematch (buf, "adjust")) - { - pcheck_case = PCHECK_ADJUST; - debug_printf ("File case checking set to ADJUST"); - } - else if (strcasematch (buf, "strict")) - { - pcheck_case = PCHECK_STRICT; - debug_printf ("File case checking set to STRICT"); - } - else - { - debug_printf ("Wrong case checking name: %s", buf); - } -} - -void -set_file_api_mode (codepage_type cp) -{ - if (cp == oem_cp) - { - SetFileApisToOEM (); - debug_printf ("File APIs set to OEM"); - } - else if (cp == ansi_cp) - { - SetFileApisToANSI (); - debug_printf ("File APIs set to ANSI"); - } -} - -static void -codepage_init (const char *buf) -{ - if (!buf || !*buf) - return; - - if (strcasematch (buf, "oem")) - { - current_codepage = oem_cp; - set_file_api_mode (current_codepage); - } - else if (strcasematch (buf, "ansi")) - { - current_codepage = ansi_cp; - set_file_api_mode (current_codepage); - } - else - debug_printf ("Wrong codepage name: %s", buf); -} - -static void -subauth_id_init (const char *buf) -{ - if (!buf || !*buf) - return; - - int i = strtol (buf, NULL, 0); - - /* 0..127 are reserved by Microsoft, 132 is IIS subauthentication. */ - if (i > 127 && i != 132 && i <= 255) - subauth_id = i; -} - -static void -set_chunksize (const char *buf) -{ - wincap.set_chunksize (strtol (buf, NULL, 0)); -} - -/* The structure below is used to set up an array which is used to - parse the CYGWIN environment variable or, if enabled, options from - the registry. */ -static struct parse_thing - { - const char *name; - union parse_setting - { - BOOL *b; - DWORD *x; - int *i; - void (*func)(const char *); - } setting; - - enum settings disposition; - char *remember; - union parse_values - { - DWORD i; - const char *s; - } values[2]; - } known[] NO_COPY = -{ - {"binmode", {x: &binmode}, justset, NULL, {{O_TEXT}, {O_BINARY}}}, - {"check_case", {func: &check_case_init}, isfunc, NULL, {{0}, {0}}}, - {"codepage", {func: &codepage_init}, isfunc, NULL, {{0}, {0}}}, - {"daemon", {&allow_daemon}, justset, NULL, {{FALSE}, {TRUE}}}, - {"envcache", {&envcache}, justset, NULL, {{TRUE}, {FALSE}}}, - {"error_start", {func: &error_start_init}, isfunc, NULL, {{0}, {0}}}, - {"export", {&export_settings}, justset, NULL, {{FALSE}, {TRUE}}}, - {"forkchunk", {func: set_chunksize}, isfunc, NULL, {{0}, {0}}}, - {"glob", {func: &glob_init}, isfunc, NULL, {{0}, {s: "normal"}}}, - {"ntea", {&allow_ntea}, justset, NULL, {{FALSE}, {TRUE}}}, - {"ntsec", {&allow_ntsec}, justset, NULL, {{FALSE}, {TRUE}}}, - {"smbntsec", {&allow_smbntsec}, justset, NULL, {{FALSE}, {TRUE}}}, - {"reset_com", {&reset_com}, justset, NULL, {{FALSE}, {TRUE}}}, - {"strip_title", {&strip_title_path}, justset, NULL, {{FALSE}, {TRUE}}}, - {"subauth_id", {func: &subauth_id_init}, isfunc, NULL, {{0}, {0}}}, - {"title", {&display_title}, justset, NULL, {{FALSE}, {TRUE}}}, - {"tty", {NULL}, set_process_state, NULL, {{0}, {PID_USETTY}}}, - {"winsymlinks", {&allow_winsymlinks}, justset, NULL, {{FALSE}, {TRUE}}}, - {NULL, {0}, justset, 0, {{0}, {0}}} -}; - -/* Parse a string of the form "something=stuff somethingelse=more-stuff", - silently ignoring unknown "somethings". */ -static void __stdcall -parse_options (char *buf) -{ - int istrue; - char *p, *lasts; - parse_thing *k; - - if (buf == NULL) - { - char newbuf[MAX_PATH + 7]; - newbuf[0] = '\0'; - for (k = known; k->name != NULL; k++) - if (k->remember) - { - strcat (strcat (newbuf, " "), k->remember); - free (k->remember); - k->remember = NULL; - } - - if (export_settings) - { - debug_printf ("%s", newbuf + 1); - setenv ("CYGWIN", newbuf + 1, 1); - } - return; - } - - buf = strcpy ((char *) alloca (strlen (buf) + 1), buf); - for (p = strtok_r (buf, " \t", &lasts); - p != NULL; - p = strtok_r (NULL, " \t", &lasts)) - { - char *keyword_here = p; - if (!(istrue = !strncasematch (p, "no", 2))) - p += 2; - else if (!(istrue = *p != '-')) - p++; - - char ch, *eq; - if ((eq = strchr (p, '=')) != NULL || (eq = strchr (p, ':')) != NULL) - ch = *eq, *eq++ = '\0'; - else - ch = 0; - - for (parse_thing *k = known; k->name != NULL; k++) - if (strcasematch (p, k->name)) - { - switch (k->disposition) - { - case isfunc: - k->setting.func ((!eq || !istrue) ? - k->values[istrue].s : eq); - debug_printf ("%s (called func)", k->name); - break; - case justset: - if (!istrue || !eq) - *k->setting.x = k->values[istrue].i; - else - *k->setting.x = strtol (eq, NULL, 0); - debug_printf ("%s %d", k->name, *k->setting.x); - break; - case set_process_state: - k->setting.x = &myself->process_state; - /* fall through */ - case setbit: - *k->setting.x &= ~k->values[istrue].i; - if (istrue || (eq && strtol (eq, NULL, 0))) - *k->setting.x |= k->values[istrue].i; - debug_printf ("%s %x", k->name, *k->setting.x); - break; - } - - if (eq) - *--eq = ch; - - int n = eq - p; - p = strdup (keyword_here); - if (n > 0) - p[n] = ':'; - k->remember = p; - break; - } - } - debug_printf ("returning"); - return; -} - -/* Set options from the registry. */ -static bool __stdcall -regopt (const char *name) -{ - bool parsed_something = false; - /* FIXME: should not be under mount */ - reg_key r (KEY_READ, CYGWIN_INFO_PROGRAM_OPTIONS_NAME, NULL); - char buf[MAX_PATH]; - char lname[strlen (name) + 1]; - strlwr (strcpy (lname, name)); - - if (r.get_string (lname, buf, sizeof (buf) - 1, "") == ERROR_SUCCESS) - { - parse_options (buf); - parsed_something = true; - } - else - { - reg_key r1 (HKEY_LOCAL_MACHINE, KEY_READ, "SOFTWARE", - CYGWIN_INFO_CYGNUS_REGISTRY_NAME, - CYGWIN_INFO_CYGWIN_REGISTRY_NAME, - CYGWIN_INFO_PROGRAM_OPTIONS_NAME, NULL); - if (r1.get_string (lname, buf, sizeof (buf) - 1, "") == ERROR_SUCCESS) - { - parse_options (buf); - parsed_something = true; - } - } - MALLOC_CHECK; - return parsed_something; -} - -/* Initialize the environ array. Look for the CYGWIN environment - environment variable and set appropriate options from it. */ -void -environ_init (char **envp, int envc) -{ - char *rawenv; - int i; - char *p; - char *newp; - int sawTERM = 0; - bool envp_passed_in; - bool got_something_from_registry; - static char NO_COPY cygterm[] = "TERM=cygwin"; - - static int initted; - if (!initted) - { - for (int i = 0; conv_envvars[i].name != NULL; i++) - { - conv_start_chars[(int) cyg_tolower (conv_envvars[i].name[0])] = 1; - conv_start_chars[(int) cyg_toupper (conv_envvars[i].name[0])] = 1; - } - initted = 1; - } - - got_something_from_registry = regopt ("default"); - if (myself->progname[0]) - got_something_from_registry = regopt (myself->progname) || got_something_from_registry; - - /* Set ntsec explicit as default, if NT is running */ - if (wincap.has_security ()) - allow_ntsec = TRUE; - - if (!envp) - envp_passed_in = 0; - else - { - envc++; - envc *= sizeof (char *); - char **newenv = (char **) malloc (envc); - memcpy (newenv, envp, envc); - cfree (envp); - - /* Older applications relied on the fact that cygwin malloced elements of the - environment list. */ - envp = newenv; - if (ENVMALLOC) - for (char **e = newenv; *e; e++) - { - char *p = *e; - *e = strdup (p); - cfree (p); - } - envp_passed_in = 1; - goto out; - } - - /* Allocate space for environment + trailing NULL + CYGWIN env. */ - lastenviron = envp = (char **) malloc ((4 + (envc = 100)) * sizeof (char *)); - rawenv = GetEnvironmentStrings (); - - /* Current directory information is recorded as variables of the - form "=X:=X:\foo\bar; these must be changed into something legal - (we could just ignore them but maybe an application will - eventually want to use them). */ - for (i = 0, p = rawenv; *p != '\0'; p = strchr (p, '\0') + 1, i++) - { - newp = strdup (p); - if (i >= envc) - envp = (char **) realloc (envp, (4 + (envc += 100)) * sizeof (char *)); - envp[i] = newp; - if (*newp == '=') - *newp = '!'; - char *eq; - if ((eq = strchr (newp, '=')) == NULL) - eq = strchr (newp, '\0'); - if (!child_proc_info) - ucenv (newp, eq); - if (*newp == 'T' && strncmp (newp, "TERM=", 5) == 0) - sawTERM = 1; - if (*newp == 'C' && strncmp (newp, "CYGWIN=", sizeof ("CYGWIN=") - 1) == 0) - parse_options (newp + sizeof ("CYGWIN=") - 1); - if (*eq && conv_start_chars[(unsigned char)envp[i][0]]) - posify (envp + i, *++eq ? eq : --eq); - debug_printf ("%p: %s", envp[i], envp[i]); - } - - if (!sawTERM) - envp[i++] = cygterm; - envp[i] = NULL; - FreeEnvironmentStrings (rawenv); - -out: - __cygwin_environ = envp; - update_envptrs (); - if (envp_passed_in) - { - p = getenv ("CYGWIN"); - if (p) - parse_options (p); - } - - if (got_something_from_registry) - parse_options (NULL); /* possibly export registry settings to - environment */ - MALLOC_CHECK; -} - -/* Function called by qsort to sort environment strings. */ -static int -env_sort (const void *a, const void *b) -{ - const char **p = (const char **) a; - const char **q = (const char **) b; - - return strcmp (*p, *q); -} - -char * __stdcall -getwinenveq (const char *name, size_t namelen, int x) -{ - char dum[1]; - char name0[namelen - 1]; - memcpy (name0, name, namelen - 1); - name0[namelen - 1] = '\0'; - int totlen = GetEnvironmentVariable (name0, dum, 0); - if (totlen > 0) - { - totlen++; - if (x == HEAP_1_STR) - totlen += namelen; - else - namelen = 0; - char *p = (char *) cmalloc ((cygheap_types) x, totlen); - if (namelen) - strcpy (p, name); - if (GetEnvironmentVariable (name0, p + namelen, totlen)) - { - debug_printf ("using value from GetEnvironmentVariable for '%s'", - name0); - return p; - } - else - cfree (p); - } - - debug_printf ("warning: %s not present in environment", name); - return NULL; -} - -struct spenv -{ - const char *name; - size_t namelen; - const char * (cygheap_user::*from_cygheap) (const char *, size_t); - char *retrieve (bool, const char * const = NULL) - __attribute__ ((regparm (3))); -}; - -#define env_dontadd almost_null - -/* Keep this list in upper case and sorted */ -static NO_COPY spenv spenvs[] = -{ - {NL ("HOMEDRIVE="), &cygheap_user::env_homedrive}, - {NL ("HOMEPATH="), &cygheap_user::env_homepath}, - {NL ("LOGONSERVER="), &cygheap_user::env_logsrv}, - {NL ("SYSTEMDRIVE="), NULL}, - {NL ("SYSTEMROOT="), NULL}, - {NL ("USERDOMAIN="), &cygheap_user::env_domain}, - {NL ("USERNAME="), &cygheap_user::env_name}, - {NL ("USERPROFILE="), &cygheap_user::env_userprofile}, -}; - -char * -spenv::retrieve (bool no_envblock, const char *const envname) -{ - if (envname && !strncasematch (envname, name, namelen)) - return NULL; - - debug_printf ("no_envblock %d", no_envblock); - - if (from_cygheap) - { - const char *p; - if (envname && !cygheap->user.issetuid ()) - { - debug_printf ("duping existing value for '%s'", name); - return cstrdup1 (envname); /* Don't really care what it's set to - if we're calling a cygwin program */ - } - - /* Calculate (potentially) value for given environment variable. */ - p = (cygheap->user.*from_cygheap) (name, namelen); - if (!p || (no_envblock && !envname) || (p == env_dontadd)) - return env_dontadd; - char *s = (char *) cmalloc (HEAP_1_STR, namelen + strlen (p) + 1); - strcpy (s, name); - (void) strcpy (s + namelen, p); - debug_printf ("using computed value for '%s'", name); - return s; - } - - if (envname) - return cstrdup1 (envname); - - return getwinenveq (name, namelen, HEAP_1_STR); -} - -#define SPENVS_SIZE (sizeof (spenvs) / sizeof (spenvs[0])) - -/* Create a Windows-style environment block, i.e. a typical character buffer - filled with null terminated strings, terminated by double null characters. - Converts environment variables noted in conv_envvars into win32 form - prior to placing them in the string. */ -char ** __stdcall -build_env (const char * const *envp, char *&envblock, int &envc, - bool no_envblock) -{ - int len, n; - const char * const *srcp; - char **dstp; - bool saw_spenv[SPENVS_SIZE] = {0}; - - debug_printf ("envp %p", envp); - - /* How many elements? */ - for (n = 0; envp[n]; n++) - continue; - - /* Allocate a new "argv-style" environ list with room for extra stuff. */ - char **newenv = (char **) cmalloc (HEAP_1_ARGV, sizeof (char *) * - (n + SPENVS_SIZE + 1)); - - int tl = 0; - /* Iterate over input list, generating a new environment list and refreshing - "special" entries, if necessary. */ - for (srcp = envp, dstp = newenv; *srcp; srcp++) - { - /* Look for entries that require special attention */ - for (unsigned i = 0; i < SPENVS_SIZE; i++) - if (!saw_spenv[i] && (*dstp = spenvs[i].retrieve (no_envblock, *srcp))) - { - saw_spenv[i] = 1; - if (*dstp == env_dontadd) - goto next1; - goto next0; - } - - /* Add entry to new environment */ - *dstp = cstrdup1 (*srcp); - - next0: - /* If necessary, calculate rough running total for envblock size */ - if (!no_envblock) - tl += strlen (*dstp) + 1; - dstp++; - next1: - continue; - } - - assert ((srcp - envp) == n); - /* Fill in any required-but-missing environment variables. */ - for (unsigned i = 0; i < SPENVS_SIZE; i++) - if (!saw_spenv[i]) - { - *dstp = spenvs[i].retrieve (no_envblock); - if (*dstp && !no_envblock && *dstp != env_dontadd) - { - tl += strlen (*dstp) + 1; - dstp++; - } - } - - envc = dstp - newenv; /* Number of entries in newenv */ - assert ((size_t) envc <= (n + SPENVS_SIZE)); - *dstp = NULL; /* Terminate */ - - if (no_envblock) - envblock = NULL; - else - { - debug_printf ("env count %d, bytes %d", envc, tl); - - /* Windows programs expect the environment block to be sorted. */ - qsort (newenv, envc, sizeof (char *), env_sort); - - /* Create an environment block suitable for passing to CreateProcess. */ - char *s; - envblock = (char *) malloc (2 + tl); - int new_tl = 0; - for (srcp = newenv, s = envblock; *srcp; srcp++) - { - const char *p; - win_env *conv; - len = strcspn (*srcp, "=") + 1; - - /* See if this entry requires posix->win32 conversion. */ - conv = getwinenv (*srcp, *srcp + len); - if (conv) - p = conv->native; /* Use win32 path */ - else - p = *srcp; /* Don't worry about it */ - - len = strlen (p); - new_tl += len + 1; /* Keep running total of block length so far */ - - /* See if we need to increase the size of the block. */ - if (new_tl > tl) - { - tl = new_tl + 100; - char *new_envblock = - (char *) realloc (envblock, 2 + tl); - /* If realloc moves the block, move `s' with it. */ - if (new_envblock != envblock) - { - s += new_envblock - envblock; - envblock = new_envblock; - } - } - - memcpy (s, p, len + 1); - - /* See if environment variable is "special" in a Windows sense. - Under NT, the current directories for visited drives are stored - as =C:=\bar. Cygwin converts the '=' to '!' for hopefully obvious - reasons. We need to convert it back when building the envblock */ - if (s[0] == '!' && (isdrive (s + 1) || (s[1] == ':' && s[2] == ':')) - && s[3] == '=') - *s = '='; - s += len + 1; - } - *s = '\0'; /* Two null bytes at the end */ - assert ((s - envblock) <= tl); /* Detect if we somehow ran over end - of buffer */ - } - - debug_printf ("envp %p, envc %d", newenv, envc); - return newenv; -} - -/* This idiocy is necessary because the early implementers of cygwin - did not seem to know about importing data variables from the DLL. - So, we have to synchronize cygwin's idea of the environment with the - main program's with each reference to the environment. */ -extern "C" char ** __stdcall -cur_environ () -{ - if (*main_environ != __cygwin_environ) - { - __cygwin_environ = *main_environ; - update_envptrs (); - } - - return __cygwin_environ; -} |