* Various trivial helper wrappers around standard functions
*/
#include "cache.h"
-
-static void do_nothing(size_t size)
-{
-}
-
-static void (*try_to_free_routine)(size_t size) = do_nothing;
+#include "config.h"
static int memory_limit_check(size_t size, int gentle)
{
return 0;
}
-try_to_free_t set_try_to_free_routine(try_to_free_t routine)
-{
- try_to_free_t old = try_to_free_routine;
- if (!routine)
- routine = do_nothing;
- try_to_free_routine = routine;
- return old;
-}
-
char *xstrdup(const char *str)
{
char *ret = strdup(str);
- if (!ret) {
- try_to_free_routine(strlen(str) + 1);
- ret = strdup(str);
- if (!ret)
- die("Out of memory, strdup failed");
- }
+ if (!ret)
+ die("Out of memory, strdup failed");
return ret;
}
if (!ret && !size)
ret = malloc(1);
if (!ret) {
- try_to_free_routine(size);
- ret = malloc(size);
- if (!ret && !size)
- ret = malloc(1);
- if (!ret) {
- if (!gentle)
- die("Out of memory, malloc failed (tried to allocate %lu bytes)",
- (unsigned long)size);
- else {
- error("Out of memory, malloc failed (tried to allocate %lu bytes)",
- (unsigned long)size);
- return NULL;
- }
+ if (!gentle)
+ die("Out of memory, malloc failed (tried to allocate %lu bytes)",
+ (unsigned long)size);
+ else {
+ error("Out of memory, malloc failed (tried to allocate %lu bytes)",
+ (unsigned long)size);
+ return NULL;
}
}
#ifdef XMALLOC_POISON
ret = realloc(ptr, size);
if (!ret && !size)
ret = realloc(ptr, 1);
- if (!ret) {
- try_to_free_routine(size);
- ret = realloc(ptr, size);
- if (!ret && !size)
- ret = realloc(ptr, 1);
- if (!ret)
- die("Out of memory, realloc failed");
- }
+ if (!ret)
+ die("Out of memory, realloc failed");
return ret;
}
ret = calloc(nmemb, size);
if (!ret && (!nmemb || !size))
ret = calloc(1, 1);
- if (!ret) {
- try_to_free_routine(nmemb * size);
- ret = calloc(nmemb, size);
- if (!ret && (!nmemb || !size))
- ret = calloc(1, 1);
- if (!ret)
- die("Out of memory, calloc failed");
- }
+ if (!ret)
+ die("Out of memory, calloc failed");
return ret;
}
return ret;
}
-int xmkstemp(char *template)
+static void warn_on_inaccessible(const char *path)
+{
+ warning_errno(_("unable to access '%s'"), path);
+}
+
+int warn_on_fopen_errors(const char *path)
+{
+ if (errno != ENOENT && errno != ENOTDIR) {
+ warn_on_inaccessible(path);
+ return -1;
+ }
+
+ return 0;
+}
+
+FILE *fopen_or_warn(const char *path, const char *mode)
+{
+ FILE *fp = fopen(path, mode);
+
+ if (fp)
+ return fp;
+
+ warn_on_fopen_errors(path);
+ return NULL;
+}
+
+int xmkstemp(char *filename_template)
{
int fd;
char origtemplate[PATH_MAX];
- strlcpy(origtemplate, template, sizeof(origtemplate));
+ strlcpy(origtemplate, filename_template, sizeof(origtemplate));
- fd = mkstemp(template);
+ fd = mkstemp(filename_template);
if (fd < 0) {
int saved_errno = errno;
const char *nonrelative_template;
- if (strlen(template) != strlen(origtemplate))
- template = origtemplate;
+ if (strlen(filename_template) != strlen(origtemplate))
+ filename_template = origtemplate;
- nonrelative_template = absolute_path(template);
+ nonrelative_template = absolute_path(filename_template);
errno = saved_errno;
die_errno("Unable to create temporary file '%s'",
nonrelative_template);
static const int num_letters = 62;
uint64_t value;
struct timeval tv;
- char *template;
+ char *filename_template;
size_t len;
int fd, count;
* Try TMP_MAX different filenames.
*/
gettimeofday(&tv, NULL);
- value = ((size_t)(tv.tv_usec << 16)) ^ tv.tv_sec ^ getpid();
- template = &pattern[len - 6 - suffix_len];
+ value = ((uint64_t)tv.tv_usec << 16) ^ tv.tv_sec ^ getpid();
+ filename_template = &pattern[len - 6 - suffix_len];
for (count = 0; count < TMP_MAX; ++count) {
uint64_t v = value;
/* Fill in the random bits. */
- template[0] = letters[v % num_letters]; v /= num_letters;
- template[1] = letters[v % num_letters]; v /= num_letters;
- template[2] = letters[v % num_letters]; v /= num_letters;
- template[3] = letters[v % num_letters]; v /= num_letters;
- template[4] = letters[v % num_letters]; v /= num_letters;
- template[5] = letters[v % num_letters]; v /= num_letters;
+ filename_template[0] = letters[v % num_letters]; v /= num_letters;
+ filename_template[1] = letters[v % num_letters]; v /= num_letters;
+ filename_template[2] = letters[v % num_letters]; v /= num_letters;
+ filename_template[3] = letters[v % num_letters]; v /= num_letters;
+ filename_template[4] = letters[v % num_letters]; v /= num_letters;
+ filename_template[5] = letters[v % num_letters]; v /= num_letters;
fd = open(pattern, O_CREAT | O_EXCL | O_RDWR, mode);
if (fd >= 0)
return git_mkstemps_mode(pattern, 0, mode);
}
-int xmkstemp_mode(char *template, int mode)
+int xmkstemp_mode(char *filename_template, int mode)
{
int fd;
char origtemplate[PATH_MAX];
- strlcpy(origtemplate, template, sizeof(origtemplate));
+ strlcpy(origtemplate, filename_template, sizeof(origtemplate));
- fd = git_mkstemp_mode(template, mode);
+ fd = git_mkstemp_mode(filename_template, mode);
if (fd < 0) {
int saved_errno = errno;
const char *nonrelative_template;
- if (!template[0])
- template = origtemplate;
+ if (!filename_template[0])
+ filename_template = origtemplate;
- nonrelative_template = absolute_path(template);
+ nonrelative_template = absolute_path(filename_template);
errno = saved_errno;
die_errno("Unable to create temporary file '%s'",
nonrelative_template);
if (!rc || errno == ENOENT)
return 0;
err = errno;
- warning_errno("unable to %s %s", op, file);
+ warning_errno("unable to %s '%s'", op, file);
errno = err;
return rc;
}
if (!rc || errno == ENOENT)
return 0;
- strbuf_addf(err, "unable to unlink %s: %s",
+ strbuf_addf(err, "unable to unlink '%s': %s",
file, strerror(errno));
return -1;
}
return S_ISGITLINK(mode) ? rmdir_or_warn(file) : unlink_or_warn(file);
}
-void warn_on_inaccessible(const char *path)
-{
- warning_errno(_("unable to access '%s'"), path);
-}
-
static int access_error_is_ok(int err, unsigned flag)
{
- return err == ENOENT || err == ENOTDIR ||
- ((flag & ACCESS_EACCES_OK) && err == EACCES);
+ return (is_missing_file_error(err) ||
+ ((flag & ACCESS_EACCES_OK) && err == EACCES));
}
int access_or_warn(const char *path, int mode, unsigned flag)
va_end(ap);
if (len < 0)
- die("BUG: your snprintf is broken");
+ BUG("your snprintf is broken");
if (len >= max)
- die("BUG: attempt to snprintf into too-small buffer");
+ BUG("attempt to snprintf into too-small buffer");
return len;
}
void write_file_buf(const char *path, const char *buf, size_t len)
{
int fd = xopen(path, O_WRONLY | O_CREAT | O_TRUNC, 0666);
- if (write_in_full(fd, buf, len) != len)
- die_errno(_("could not write to %s"), path);
+ if (write_in_full(fd, buf, len) < 0)
+ die_errno(_("could not write to '%s'"), path);
if (close(fd))
- die_errno(_("could not close %s"), path);
+ die_errno(_("could not close '%s'"), path);
}
void write_file(const char *path, const char *fmt, ...)
{
poll(NULL, 0, millisec);
}
+
+int xgethostname(char *buf, size_t len)
+{
+ /*
+ * If the full hostname doesn't fit in buf, POSIX does not
+ * specify whether the buffer will be null-terminated, so to
+ * be safe, do it ourselves.
+ */
+ int ret = gethostname(buf, len);
+ if (!ret)
+ buf[len - 1] = 0;
+ return ret;
+}
+
+int is_empty_or_missing_file(const char *filename)
+{
+ struct stat st;
+
+ if (stat(filename, &st) < 0) {
+ if (errno == ENOENT)
+ return 1;
+ die_errno(_("could not stat %s"), filename);
+ }
+
+ return !st.st_size;
+}