return prog;
}
-static int env_compare(const void *a, const void *b)
+static int do_putenv(char **env, const char *name, int size, int free_old);
+
+/* used number of elements of environ array, including terminating NULL */
+static int environ_size = 0;
+/* allocated size of environ array, in bytes */
+static int environ_alloc = 0;
+
+/*
+ * Create environment block suitable for CreateProcess. Merges current
+ * process environment and the supplied environment changes.
+ */
+static wchar_t *make_environment_block(char **deltaenv)
{
- char *const *ea = a;
- char *const *eb = b;
- return strcasecmp(*ea, *eb);
+ wchar_t *wenvblk = NULL;
+ char **tmpenv;
+ int i = 0, size = environ_size, wenvsz = 0, wenvpos = 0;
+
+ while (deltaenv && deltaenv[i])
+ i++;
+
+ /* copy the environment, leaving space for changes */
+ tmpenv = xmalloc((size + i) * sizeof(char*));
+ memcpy(tmpenv, environ, size * sizeof(char*));
+
+ /* merge supplied environment changes into the temporary environment */
+ for (i = 0; deltaenv && deltaenv[i]; i++)
+ size = do_putenv(tmpenv, deltaenv[i], size, 0);
+
+ /* create environment block from temporary environment */
+ for (i = 0; tmpenv[i]; i++) {
+ size = 2 * strlen(tmpenv[i]) + 2; /* +2 for final \0 */
+ ALLOC_GROW(wenvblk, (wenvpos + size) * sizeof(wchar_t), wenvsz);
+ wenvpos += xutftowcs(&wenvblk[wenvpos], tmpenv[i], size) + 1;
+ }
+ /* add final \0 terminator */
+ wenvblk[wenvpos] = 0;
+ free(tmpenv);
+ return wenvblk;
}
struct pinfo_t {
static struct pinfo_t *pinfo = NULL;
CRITICAL_SECTION pinfo_cs;
-static pid_t mingw_spawnve_fd(const char *cmd, const char **argv, char **env,
+static pid_t mingw_spawnve_fd(const char *cmd, const char **argv, char **deltaenv,
const char *dir,
int prepend_cmd, int fhin, int fhout, int fherr)
{
xutftowcs(wargs, args.buf, 2 * args.len + 1);
strbuf_release(&args);
- if (env) {
- int count = 0;
- char **e, **sorted_env;
- int size = 0, wenvsz = 0, wenvpos = 0;
-
- for (e = env; *e; e++)
- count++;
-
- /* environment must be sorted */
- sorted_env = xmalloc(sizeof(*sorted_env) * (count + 1));
- memcpy(sorted_env, env, sizeof(*sorted_env) * (count + 1));
- qsort(sorted_env, count, sizeof(*sorted_env), env_compare);
-
- /* create environment block from temporary environment */
- for (e = sorted_env; *e; e++) {
- size = 2 * strlen(*e) + 2; /* +2 for final \0 */
- ALLOC_GROW(wenvblk, (wenvpos + size) * sizeof(wchar_t), wenvsz);
- wenvpos += xutftowcs(&wenvblk[wenvpos], *e, size) + 1;
- }
- /* add final \0 terminator */
- wenvblk[wenvpos] = 0;
- free(sorted_env);
- }
+ wenvblk = make_environment_block(deltaenv);
memset(&pi, 0, sizeof(pi));
ret = CreateProcessW(wcmd, wargs, NULL, NULL, TRUE, flags,
static pid_t mingw_spawnv(const char *cmd, const char **argv, int prepend_cmd)
{
- return mingw_spawnve_fd(cmd, argv, environ, NULL, prepend_cmd, 0, 1, 2);
+ return mingw_spawnve_fd(cmd, argv, NULL, NULL, prepend_cmd, 0, 1, 2);
}
-pid_t mingw_spawnvpe(const char *cmd, const char **argv, char **env,
+pid_t mingw_spawnvpe(const char *cmd, const char **argv, char **deltaenv,
const char *dir,
int fhin, int fhout, int fherr)
{
pid = -1;
}
else {
- pid = mingw_spawnve_fd(iprog, argv, env, dir, 1,
+ pid = mingw_spawnve_fd(iprog, argv, deltaenv, dir, 1,
fhin, fhout, fherr);
free(iprog);
}
argv[0] = argv0;
}
else
- pid = mingw_spawnve_fd(prog, argv, env, dir, 0,
+ pid = mingw_spawnve_fd(prog, argv, deltaenv, dir, 0,
fhin, fhout, fherr);
free(prog);
}
return -1;
}
-static char **copy_environ(void)
-{
- char **env;
- int i = 0;
- while (environ[i])
- i++;
- env = xmalloc((i+1)*sizeof(*env));
- for (i = 0; environ[i]; i++)
- env[i] = xstrdup(environ[i]);
- env[i] = NULL;
- return env;
-}
-
-void free_environ(char **env)
-{
- int i;
- for (i = 0; env[i]; i++)
- free(env[i]);
- free(env);
+/*
+ * Compare environment entries by key (i.e. stopping at '=' or '\0').
+ */
+static int compareenv(const void *v1, const void *v2)
+{
+ const char *e1 = *(const char**)v1;
+ const char *e2 = *(const char**)v2;
+
+ for (;;) {
+ int c1 = *e1++;
+ int c2 = *e2++;
+ c1 = (c1 == '=') ? 0 : tolower(c1);
+ c2 = (c2 == '=') ? 0 : tolower(c2);
+ if (c1 > c2)
+ return 1;
+ if (c1 < c2)
+ return -1;
+ if (c1 == 0)
+ return 0;
+ }
}
-static int lookup_env(char **env, const char *name, size_t nmln)
+static int bsearchenv(char **env, const char *name, size_t size)
{
- int i;
-
- for (i = 0; env[i]; i++) {
- if (0 == strncmp(env[i], name, nmln)
- && '=' == env[i][nmln])
- /* matches */
- return i;
+ unsigned low = 0, high = size;
+ while (low < high) {
+ unsigned mid = low + ((high - low) >> 1);
+ int cmp = compareenv(&env[mid], &name);
+ if (cmp < 0)
+ low = mid + 1;
+ else if (cmp > 0)
+ high = mid;
+ else
+ return mid;
}
- return -1;
+ return ~low; /* not found, return 1's complement of insert position */
}
/*
* If name contains '=', then sets the variable, otherwise it unsets it
+ * Size includes the terminating NULL. Env must have room for size + 1 entries
+ * (in case of insert). Returns the new size. Optionally frees removed entries.
*/
-static char **env_setenv(char **env, const char *name)
+static int do_putenv(char **env, const char *name, int size, int free_old)
{
- char *eq = strchrnul(name, '=');
- int i = lookup_env(env, name, eq-name);
+ int i = bsearchenv(env, name, size - 1);
- if (i < 0) {
- if (*eq) {
- for (i = 0; env[i]; i++)
- ;
- env = xrealloc(env, (i+2)*sizeof(*env));
- env[i] = xstrdup(name);
- env[i+1] = NULL;
- }
- }
- else {
+ /* optionally free removed / replaced entry */
+ if (i >= 0 && free_old)
free(env[i]);
- if (*eq)
- env[i] = xstrdup(name);
- else
- for (; env[i]; i++)
- env[i] = env[i+1];
- }
- return env;
-}
-
-/*
- * Copies global environ and adjusts variables as specified by vars.
- */
-char **make_augmented_environ(const char *const *vars)
-{
- char **env = copy_environ();
- while (*vars)
- env = env_setenv(env, *vars++);
- return env;
+ if (strchr(name, '=')) {
+ /* if new value ('key=value') is specified, insert or replace entry */
+ if (i < 0) {
+ i = ~i;
+ memmove(&env[i + 1], &env[i], (size - i) * sizeof(char*));
+ size++;
+ }
+ env[i] = (char*) name;
+ } else if (i >= 0) {
+ /* otherwise ('key') remove existing entry */
+ size--;
+ memmove(&env[i], &env[i + 1], (size - i) * sizeof(char*));
+ }
+ return size;
}
-#undef getenv
char *mingw_getenv(const char *name)
{
- char *result = getenv(name);
- if (!result && !strcmp(name, "TMPDIR")) {
- /* on Windows it is TMP and TEMP */
- result = getenv("TMP");
- if (!result)
- result = getenv("TEMP");
- }
- return result;
+ char *value;
+ int pos = bsearchenv(environ, name, environ_size - 1);
+ if (pos < 0)
+ return NULL;
+ value = strchr(environ[pos], '=');
+ return value ? &value[1] : NULL;
}
int mingw_putenv(const char *namevalue)
{
- environ = env_setenv(environ, namevalue);
+ ALLOC_GROW(environ, (environ_size + 1) * sizeof(char*), environ_alloc);
+ environ_size = do_putenv(environ, namevalue, environ_size, 1);
return 0;
}
else
ai->ai_canonname = NULL;
- sin = xmalloc(ai->ai_addrlen);
- memset(sin, 0, ai->ai_addrlen);
+ sin = xcalloc(1, ai->ai_addrlen);
sin->sin_family = AF_INET;
/* Note: getaddrinfo is supposed to allow service to be a string,
* which should be looked up using getservbyname. This is
exit(128);
}
+static void *malloc_startup(size_t size)
+{
+ void *result = malloc(size);
+ if (!result)
+ die_startup();
+ return result;
+}
+
+static char *wcstoutfdup_startup(char *buffer, const wchar_t *wcs, size_t len)
+{
+ len = xwcstoutf(buffer, wcs, len) + 1;
+ return memcpy(malloc_startup(len), buffer, len);
+}
+
void mingw_startup()
{
- int i, len, maxlen, argc;
+ int i, maxlen, argc;
char *buffer;
wchar_t **wenv, **wargv;
_startupinfo si;
for (i = 0; wenv[i]; i++)
maxlen = max(maxlen, wcslen(wenv[i]));
- /* nedmalloc can't free CRT memory, allocate resizable environment list */
- environ = xcalloc(i + 1, sizeof(char*));
+ /*
+ * nedmalloc can't free CRT memory, allocate resizable environment
+ * list. Note that xmalloc / xmemdupz etc. call getenv, so we cannot
+ * use it while initializing the environment itself.
+ */
+ environ_size = i + 1;
+ environ_alloc = alloc_nr(environ_size * sizeof(char*));
+ environ = malloc_startup(environ_alloc);
/* allocate buffer (wchar_t encodes to max 3 UTF-8 bytes) */
maxlen = 3 * maxlen + 1;
- buffer = xmalloc(maxlen);
+ buffer = malloc_startup(maxlen);
/* convert command line arguments and environment to UTF-8 */
- len = xwcstoutf(buffer, _wpgmptr, maxlen);
- __argv[0] = xmemdupz(buffer, len);
- for (i = 1; i < argc; i++) {
- len = xwcstoutf(buffer, wargv[i], maxlen);
- __argv[i] = xmemdupz(buffer, len);
- }
- for (i = 0; wenv[i]; i++) {
- len = xwcstoutf(buffer, wenv[i], maxlen);
- environ[i] = xmemdupz(buffer, len);
- }
+ __argv[0] = wcstoutfdup_startup(buffer, _wpgmptr, maxlen);
+ for (i = 1; i < argc; i++)
+ __argv[i] = wcstoutfdup_startup(buffer, wargv[i], maxlen);
+ for (i = 0; wenv[i]; i++)
+ environ[i] = wcstoutfdup_startup(buffer, wenv[i], maxlen);
+ environ[i] = NULL;
free(buffer);
+ /* sort environment for O(log n) getenv / putenv */
+ qsort(environ, i, sizeof(char*), compareenv);
+
+ /* fix Windows specific environment settings */
+
+ /* on Windows it is TMP and TEMP */
+ if (!mingw_getenv("TMPDIR")) {
+ const char *tmp = mingw_getenv("TMP");
+ if (!tmp)
+ tmp = mingw_getenv("TEMP");
+ if (tmp)
+ setenv("TMPDIR", tmp, 1);
+ }
+
+ /* simulate TERM to enable auto-color (see color.c) */
+ if (!getenv("TERM"))
+ setenv("TERM", "cygwin", 1);
+
/* initialize critical section for waitpid pinfo_t list */
InitializeCriticalSection(&pinfo_cs);