| #ifndef GIT_COMPAT_UTIL_H |
| #define GIT_COMPAT_UTIL_H |
| |
| #if __STDC_VERSION__ - 0 < 199901L |
| /* |
| * Git is in a testing period for mandatory C99 support in the compiler. If |
| * your compiler is reasonably recent, you can try to enable C99 support (or, |
| * for MSVC, C11 support). If you encounter a problem and can't enable C99 |
| * support with your compiler (such as with "-std=gnu99") and don't have access |
| * to one with this support, such as GCC or Clang, you can remove this #if |
| * directive, but please report the details of your system to |
| * git@vger.kernel.org. |
| */ |
| #error "Required C99 support is in a test phase. Please see git-compat-util.h for more details." |
| #endif |
| |
| #ifdef USE_MSVC_CRTDBG |
| /* |
| * For these to work they must appear very early in each |
| * file -- before most of the standard header files. |
| */ |
| #include <stdlib.h> |
| #include <crtdbg.h> |
| #endif |
| |
| #define _FILE_OFFSET_BITS 64 |
| |
| |
| /* Derived from Linux "Features Test Macro" header |
| * Convenience macros to test the versions of gcc (or |
| * a compatible compiler). |
| * Use them like this: |
| * #if GIT_GNUC_PREREQ (2,8) |
| * ... code requiring gcc 2.8 or later ... |
| * #endif |
| */ |
| #if defined(__GNUC__) && defined(__GNUC_MINOR__) |
| # define GIT_GNUC_PREREQ(maj, min) \ |
| ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min)) |
| #else |
| #define GIT_GNUC_PREREQ(maj, min) 0 |
| #endif |
| |
| |
| #ifndef FLEX_ARRAY |
| /* |
| * See if our compiler is known to support flexible array members. |
| */ |
| |
| /* |
| * Check vendor specific quirks first, before checking the |
| * __STDC_VERSION__, as vendor compilers can lie and we need to be |
| * able to work them around. Note that by not defining FLEX_ARRAY |
| * here, we can fall back to use the "safer but a bit wasteful" one |
| * later. |
| */ |
| #if defined(__SUNPRO_C) && (__SUNPRO_C <= 0x580) |
| #elif defined(__GNUC__) |
| # if (__GNUC__ >= 3) |
| # define FLEX_ARRAY /* empty */ |
| # else |
| # define FLEX_ARRAY 0 /* older GNU extension */ |
| # endif |
| #elif defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) |
| # define FLEX_ARRAY /* empty */ |
| #endif |
| |
| /* |
| * Otherwise, default to safer but a bit wasteful traditional style |
| */ |
| #ifndef FLEX_ARRAY |
| # define FLEX_ARRAY 1 |
| #endif |
| #endif |
| |
| |
| /* |
| * BUILD_ASSERT_OR_ZERO - assert a build-time dependency, as an expression. |
| * @cond: the compile-time condition which must be true. |
| * |
| * Your compile will fail if the condition isn't true, or can't be evaluated |
| * by the compiler. This can be used in an expression: its value is "0". |
| * |
| * Example: |
| * #define foo_to_char(foo) \ |
| * ((char *)(foo) \ |
| * + BUILD_ASSERT_OR_ZERO(offsetof(struct foo, string) == 0)) |
| */ |
| #define BUILD_ASSERT_OR_ZERO(cond) \ |
| (sizeof(char [1 - 2*!(cond)]) - 1) |
| |
| #if GIT_GNUC_PREREQ(3, 1) |
| /* &arr[0] degrades to a pointer: a different type from an array */ |
| # define BARF_UNLESS_AN_ARRAY(arr) \ |
| BUILD_ASSERT_OR_ZERO(!__builtin_types_compatible_p(__typeof__(arr), \ |
| __typeof__(&(arr)[0]))) |
| #else |
| # define BARF_UNLESS_AN_ARRAY(arr) 0 |
| #endif |
| /* |
| * ARRAY_SIZE - get the number of elements in a visible array |
| * @x: the array whose size you want. |
| * |
| * This does not work on pointers, or arrays declared as [], or |
| * function parameters. With correct compiler support, such usage |
| * will cause a build error (see the build_assert_or_zero macro). |
| */ |
| #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]) + BARF_UNLESS_AN_ARRAY(x)) |
| |
| #define bitsizeof(x) (CHAR_BIT * sizeof(x)) |
| |
| #define maximum_signed_value_of_type(a) \ |
| (INTMAX_MAX >> (bitsizeof(intmax_t) - bitsizeof(a))) |
| |
| #define maximum_unsigned_value_of_type(a) \ |
| (UINTMAX_MAX >> (bitsizeof(uintmax_t) - bitsizeof(a))) |
| |
| /* |
| * Signed integer overflow is undefined in C, so here's a helper macro |
| * to detect if the sum of two integers will overflow. |
| * |
| * Requires: a >= 0, typeof(a) equals typeof(b) |
| */ |
| #define signed_add_overflows(a, b) \ |
| ((b) > maximum_signed_value_of_type(a) - (a)) |
| |
| #define unsigned_add_overflows(a, b) \ |
| ((b) > maximum_unsigned_value_of_type(a) - (a)) |
| |
| /* |
| * Returns true if the multiplication of "a" and "b" will |
| * overflow. The types of "a" and "b" must match and must be unsigned. |
| * Note that this macro evaluates "a" twice! |
| */ |
| #define unsigned_mult_overflows(a, b) \ |
| ((a) && (b) > maximum_unsigned_value_of_type(a) / (a)) |
| |
| /* |
| * Returns true if the left shift of "a" by "shift" bits will |
| * overflow. The type of "a" must be unsigned. |
| */ |
| #define unsigned_left_shift_overflows(a, shift) \ |
| ((shift) < bitsizeof(a) && \ |
| (a) > maximum_unsigned_value_of_type(a) >> (shift)) |
| |
| #ifdef __GNUC__ |
| #define TYPEOF(x) (__typeof__(x)) |
| #else |
| #define TYPEOF(x) |
| #endif |
| |
| #define MSB(x, bits) ((x) & TYPEOF(x)(~0ULL << (bitsizeof(x) - (bits)))) |
| #define HAS_MULTI_BITS(i) ((i) & ((i) - 1)) /* checks if an integer has more than 1 bit set */ |
| |
| #define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d)) |
| |
| /* Approximation of the length of the decimal representation of this type. */ |
| #define decimal_length(x) ((int)(sizeof(x) * 2.56 + 0.5) + 1) |
| |
| #ifdef __MINGW64__ |
| #define _POSIX_C_SOURCE 1 |
| #elif defined(__sun__) |
| /* |
| * On Solaris, when _XOPEN_EXTENDED is set, its header file |
| * forces the programs to be XPG4v2, defeating any _XOPEN_SOURCE |
| * setting to say we are XPG5 or XPG6. Also on Solaris, |
| * XPG6 programs must be compiled with a c99 compiler, while |
| * non XPG6 programs must be compiled with a pre-c99 compiler. |
| */ |
| # if __STDC_VERSION__ - 0 >= 199901L |
| # define _XOPEN_SOURCE 600 |
| # else |
| # define _XOPEN_SOURCE 500 |
| # endif |
| #elif !defined(__APPLE__) && !defined(__FreeBSD__) && !defined(__USLC__) && \ |
| !defined(_M_UNIX) && !defined(__sgi) && !defined(__DragonFly__) && \ |
| !defined(__TANDEM) && !defined(__QNX__) && !defined(__MirBSD__) && \ |
| !defined(__CYGWIN__) |
| #define _XOPEN_SOURCE 600 /* glibc2 and AIX 5.3L need 500, OpenBSD needs 600 for S_ISLNK() */ |
| #define _XOPEN_SOURCE_EXTENDED 1 /* AIX 5.3L needs this */ |
| #endif |
| #define _ALL_SOURCE 1 |
| #define _GNU_SOURCE 1 |
| #define _BSD_SOURCE 1 |
| #define _DEFAULT_SOURCE 1 |
| #define _NETBSD_SOURCE 1 |
| #define _SGI_SOURCE 1 |
| |
| #if defined(WIN32) && !defined(__CYGWIN__) /* Both MinGW and MSVC */ |
| # if !defined(_WIN32_WINNT) |
| # define _WIN32_WINNT 0x0600 |
| # endif |
| #define WIN32_LEAN_AND_MEAN /* stops windows.h including winsock.h */ |
| #include <winsock2.h> |
| #ifndef NO_UNIX_SOCKETS |
| #include <afunix.h> |
| #endif |
| #include <windows.h> |
| #define GIT_WINDOWS_NATIVE |
| #endif |
| |
| #include <unistd.h> |
| #include <stdio.h> |
| #include <sys/stat.h> |
| #include <fcntl.h> |
| #include <stddef.h> |
| #include <stdlib.h> |
| #include <stdarg.h> |
| #include <string.h> |
| #ifdef HAVE_STRINGS_H |
| #include <strings.h> /* for strcasecmp() */ |
| #endif |
| #include <errno.h> |
| #include <limits.h> |
| #ifdef NEEDS_SYS_PARAM_H |
| #include <sys/param.h> |
| #endif |
| #include <sys/types.h> |
| #include <dirent.h> |
| #include <sys/time.h> |
| #include <time.h> |
| #include <signal.h> |
| #include <assert.h> |
| #include <regex.h> |
| #include <utime.h> |
| #include <syslog.h> |
| #if !defined(NO_POLL_H) |
| #include <poll.h> |
| #elif !defined(NO_SYS_POLL_H) |
| #include <sys/poll.h> |
| #else |
| /* Pull the compat stuff */ |
| #include <poll.h> |
| #endif |
| #ifdef HAVE_BSD_SYSCTL |
| #include <sys/sysctl.h> |
| #endif |
| |
| #if defined(__CYGWIN__) |
| #include "compat/win32/path-utils.h" |
| #endif |
| #if defined(__MINGW32__) |
| /* pull in Windows compatibility stuff */ |
| #include "compat/win32/path-utils.h" |
| #include "compat/mingw.h" |
| #elif defined(_MSC_VER) |
| #include "compat/win32/path-utils.h" |
| #include "compat/msvc.h" |
| #else |
| #include <sys/utsname.h> |
| #include <sys/wait.h> |
| #include <sys/resource.h> |
| #include <sys/socket.h> |
| #include <sys/ioctl.h> |
| #include <termios.h> |
| #ifndef NO_SYS_SELECT_H |
| #include <sys/select.h> |
| #endif |
| #include <netinet/in.h> |
| #include <netinet/tcp.h> |
| #include <arpa/inet.h> |
| #include <netdb.h> |
| #include <pwd.h> |
| #include <sys/un.h> |
| #ifndef NO_INTTYPES_H |
| #include <inttypes.h> |
| #else |
| #include <stdint.h> |
| #endif |
| #ifdef HAVE_ARC4RANDOM_LIBBSD |
| #include <bsd/stdlib.h> |
| #endif |
| #ifdef HAVE_GETRANDOM |
| #include <sys/random.h> |
| #endif |
| #ifdef NO_INTPTR_T |
| /* |
| * On I16LP32, ILP32 and LP64 "long" is the safe bet, however |
| * on LLP86, IL33LLP64 and P64 it needs to be "long long", |
| * while on IP16 and IP16L32 it is "int" (resp. "short") |
| * Size needs to match (or exceed) 'sizeof(void *)'. |
| * We can't take "long long" here as not everybody has it. |
| */ |
| typedef long intptr_t; |
| typedef unsigned long uintptr_t; |
| #endif |
| #undef _ALL_SOURCE /* AIX 5.3L defines a struct list with _ALL_SOURCE. */ |
| #include <grp.h> |
| #define _ALL_SOURCE 1 |
| #endif |
| |
| /* used on Mac OS X */ |
| #ifdef PRECOMPOSE_UNICODE |
| #include "compat/precompose_utf8.h" |
| #else |
| static inline const char *precompose_argv_prefix(int argc, const char **argv, const char *prefix) |
| { |
| return prefix; |
| } |
| static inline const char *precompose_string_if_needed(const char *in) |
| { |
| return in; |
| } |
| |
| #define probe_utf8_pathname_composition() |
| #endif |
| |
| #ifdef MKDIR_WO_TRAILING_SLASH |
| #define mkdir(a,b) compat_mkdir_wo_trailing_slash((a),(b)) |
| int compat_mkdir_wo_trailing_slash(const char*, mode_t); |
| #endif |
| |
| #ifdef NO_STRUCT_ITIMERVAL |
| struct itimerval { |
| struct timeval it_interval; |
| struct timeval it_value; |
| }; |
| #endif |
| |
| #ifdef NO_SETITIMER |
| static inline int setitimer(int which, const struct itimerval *value, struct itimerval *newvalue) { |
| return 0; /* pretend success */ |
| } |
| #endif |
| |
| #ifndef NO_LIBGEN_H |
| #include <libgen.h> |
| #else |
| #define basename gitbasename |
| char *gitbasename(char *); |
| #define dirname gitdirname |
| char *gitdirname(char *); |
| #endif |
| |
| #ifndef NO_ICONV |
| #include <iconv.h> |
| #endif |
| |
| #ifndef NO_OPENSSL |
| #ifdef __APPLE__ |
| #define __AVAILABILITY_MACROS_USES_AVAILABILITY 0 |
| #include <AvailabilityMacros.h> |
| #undef DEPRECATED_ATTRIBUTE |
| #define DEPRECATED_ATTRIBUTE |
| #undef __AVAILABILITY_MACROS_USES_AVAILABILITY |
| #endif |
| #include <openssl/ssl.h> |
| #include <openssl/err.h> |
| #endif |
| |
| #ifdef HAVE_SYSINFO |
| # include <sys/sysinfo.h> |
| #endif |
| |
| /* On most systems <netdb.h> would have given us this, but |
| * not on some systems (e.g. z/OS). |
| */ |
| #ifndef NI_MAXHOST |
| #define NI_MAXHOST 1025 |
| #endif |
| |
| #ifndef NI_MAXSERV |
| #define NI_MAXSERV 32 |
| #endif |
| |
| /* On most systems <limits.h> would have given us this, but |
| * not on some systems (e.g. GNU/Hurd). |
| */ |
| #ifndef PATH_MAX |
| #define PATH_MAX 4096 |
| #endif |
| |
| typedef uintmax_t timestamp_t; |
| #define PRItime PRIuMAX |
| #define parse_timestamp strtoumax |
| #define TIME_MAX UINTMAX_MAX |
| #define TIME_MIN 0 |
| |
| #ifndef PATH_SEP |
| #define PATH_SEP ':' |
| #endif |
| |
| #ifdef HAVE_PATHS_H |
| #include <paths.h> |
| #endif |
| #ifndef _PATH_DEFPATH |
| #define _PATH_DEFPATH "/usr/local/bin:/usr/bin:/bin" |
| #endif |
| |
| #ifndef platform_core_config |
| static inline int noop_core_config(const char *var, const char *value, void *cb) |
| { |
| return 0; |
| } |
| #define platform_core_config noop_core_config |
| #endif |
| |
| int lstat_cache_aware_rmdir(const char *path); |
| #if !defined(__MINGW32__) && !defined(_MSC_VER) |
| #define rmdir lstat_cache_aware_rmdir |
| #endif |
| |
| #ifndef has_dos_drive_prefix |
| static inline int git_has_dos_drive_prefix(const char *path) |
| { |
| return 0; |
| } |
| #define has_dos_drive_prefix git_has_dos_drive_prefix |
| #endif |
| |
| #ifndef skip_dos_drive_prefix |
| static inline int git_skip_dos_drive_prefix(char **path) |
| { |
| return 0; |
| } |
| #define skip_dos_drive_prefix git_skip_dos_drive_prefix |
| #endif |
| |
| #ifndef is_dir_sep |
| static inline int git_is_dir_sep(int c) |
| { |
| return c == '/'; |
| } |
| #define is_dir_sep git_is_dir_sep |
| #endif |
| |
| #ifndef offset_1st_component |
| static inline int git_offset_1st_component(const char *path) |
| { |
| return is_dir_sep(path[0]); |
| } |
| #define offset_1st_component git_offset_1st_component |
| #endif |
| |
| #ifndef is_valid_path |
| #define is_valid_path(path) 1 |
| #endif |
| |
| #ifndef find_last_dir_sep |
| static inline char *git_find_last_dir_sep(const char *path) |
| { |
| return strrchr(path, '/'); |
| } |
| #define find_last_dir_sep git_find_last_dir_sep |
| #endif |
| |
| #ifndef has_dir_sep |
| static inline int git_has_dir_sep(const char *path) |
| { |
| return !!strchr(path, '/'); |
| } |
| #define has_dir_sep(path) git_has_dir_sep(path) |
| #endif |
| |
| #ifndef query_user_email |
| #define query_user_email() NULL |
| #endif |
| |
| #ifdef __TANDEM |
| #include <floss.h(floss_execl,floss_execlp,floss_execv,floss_execvp)> |
| #include <floss.h(floss_getpwuid)> |
| #ifndef NSIG |
| /* |
| * NonStop NSE and NSX do not provide NSIG. SIGGUARDIAN(99) is the highest |
| * known, by detective work using kill -l as a list is all signals |
| * instead of signal.h where it should be. |
| */ |
| # define NSIG 100 |
| #endif |
| #endif |
| |
| #if defined(__HP_cc) && (__HP_cc >= 61000) |
| #define NORETURN __attribute__((noreturn)) |
| #define NORETURN_PTR |
| #elif defined(__GNUC__) && !defined(NO_NORETURN) |
| #define NORETURN __attribute__((__noreturn__)) |
| #define NORETURN_PTR __attribute__((__noreturn__)) |
| #elif defined(_MSC_VER) |
| #define NORETURN __declspec(noreturn) |
| #define NORETURN_PTR |
| #else |
| #define NORETURN |
| #define NORETURN_PTR |
| #ifndef __GNUC__ |
| #ifndef __attribute__ |
| #define __attribute__(x) |
| #endif |
| #endif |
| #endif |
| |
| /* The sentinel attribute is valid from gcc version 4.0 */ |
| #if defined(__GNUC__) && (__GNUC__ >= 4) |
| #define LAST_ARG_MUST_BE_NULL __attribute__((sentinel)) |
| #else |
| #define LAST_ARG_MUST_BE_NULL |
| #endif |
| |
| #define MAYBE_UNUSED __attribute__((__unused__)) |
| |
| #include "compat/bswap.h" |
| |
| #include "wildmatch.h" |
| |
| struct strbuf; |
| |
| /* General helper functions */ |
| NORETURN void usage(const char *err); |
| NORETURN void usagef(const char *err, ...) __attribute__((format (printf, 1, 2))); |
| NORETURN void die(const char *err, ...) __attribute__((format (printf, 1, 2))); |
| NORETURN void die_errno(const char *err, ...) __attribute__((format (printf, 1, 2))); |
| int die_message(const char *err, ...) __attribute__((format (printf, 1, 2))); |
| int die_message_errno(const char *err, ...) __attribute__((format (printf, 1, 2))); |
| int error(const char *err, ...) __attribute__((format (printf, 1, 2))); |
| int error_errno(const char *err, ...) __attribute__((format (printf, 1, 2))); |
| void warning(const char *err, ...) __attribute__((format (printf, 1, 2))); |
| void warning_errno(const char *err, ...) __attribute__((format (printf, 1, 2))); |
| |
| #ifndef NO_OPENSSL |
| #ifdef APPLE_COMMON_CRYPTO |
| #include "compat/apple-common-crypto.h" |
| #else |
| #include <openssl/evp.h> |
| #include <openssl/hmac.h> |
| #endif /* APPLE_COMMON_CRYPTO */ |
| #include <openssl/x509v3.h> |
| #endif /* NO_OPENSSL */ |
| |
| #ifdef HAVE_OPENSSL_CSPRNG |
| #include <openssl/rand.h> |
| #endif |
| |
| /* |
| * Let callers be aware of the constant return value; this can help |
| * gcc with -Wuninitialized analysis. We restrict this trick to gcc, though, |
| * because other compilers may be confused by this. |
| */ |
| #if defined(__GNUC__) |
| static inline int const_error(void) |
| { |
| return -1; |
| } |
| #define error(...) (error(__VA_ARGS__), const_error()) |
| #define error_errno(...) (error_errno(__VA_ARGS__), const_error()) |
| #endif |
| |
| typedef void (*report_fn)(const char *, va_list params); |
| |
| void set_die_routine(NORETURN_PTR report_fn routine); |
| report_fn get_die_message_routine(void); |
| void set_error_routine(report_fn routine); |
| report_fn get_error_routine(void); |
| void set_warn_routine(report_fn routine); |
| report_fn get_warn_routine(void); |
| void set_die_is_recursing_routine(int (*routine)(void)); |
| |
| int starts_with(const char *str, const char *prefix); |
| int istarts_with(const char *str, const char *prefix); |
| |
| /* |
| * If the string "str" begins with the string found in "prefix", return 1. |
| * The "out" parameter is set to "str + strlen(prefix)" (i.e., to the point in |
| * the string right after the prefix). |
| * |
| * Otherwise, return 0 and leave "out" untouched. |
| * |
| * Examples: |
| * |
| * [extract branch name, fail if not a branch] |
| * if (!skip_prefix(ref, "refs/heads/", &branch) |
| * return -1; |
| * |
| * [skip prefix if present, otherwise use whole string] |
| * skip_prefix(name, "refs/heads/", &name); |
| */ |
| static inline int skip_prefix(const char *str, const char *prefix, |
| const char **out) |
| { |
| do { |
| if (!*prefix) { |
| *out = str; |
| return 1; |
| } |
| } while (*str++ == *prefix++); |
| return 0; |
| } |
| |
| /* |
| * If the string "str" is the same as the string in "prefix", then the "arg" |
| * parameter is set to the "def" parameter and 1 is returned. |
| * If the string "str" begins with the string found in "prefix" and then a |
| * "=" sign, then the "arg" parameter is set to "str + strlen(prefix) + 1" |
| * (i.e., to the point in the string right after the prefix and the "=" sign), |
| * and 1 is returned. |
| * |
| * Otherwise, return 0 and leave "arg" untouched. |
| * |
| * When we accept both a "--key" and a "--key=<val>" option, this function |
| * can be used instead of !strcmp(arg, "--key") and then |
| * skip_prefix(arg, "--key=", &arg) to parse such an option. |
| */ |
| int skip_to_optional_arg_default(const char *str, const char *prefix, |
| const char **arg, const char *def); |
| |
| static inline int skip_to_optional_arg(const char *str, const char *prefix, |
| const char **arg) |
| { |
| return skip_to_optional_arg_default(str, prefix, arg, ""); |
| } |
| |
| /* |
| * Like skip_prefix, but promises never to read past "len" bytes of the input |
| * buffer, and returns the remaining number of bytes in "out" via "outlen". |
| */ |
| static inline int skip_prefix_mem(const char *buf, size_t len, |
| const char *prefix, |
| const char **out, size_t *outlen) |
| { |
| size_t prefix_len = strlen(prefix); |
| if (prefix_len <= len && !memcmp(buf, prefix, prefix_len)) { |
| *out = buf + prefix_len; |
| *outlen = len - prefix_len; |
| return 1; |
| } |
| return 0; |
| } |
| |
| /* |
| * If buf ends with suffix, return 1 and subtract the length of the suffix |
| * from *len. Otherwise, return 0 and leave *len untouched. |
| */ |
| static inline int strip_suffix_mem(const char *buf, size_t *len, |
| const char *suffix) |
| { |
| size_t suflen = strlen(suffix); |
| if (*len < suflen || memcmp(buf + (*len - suflen), suffix, suflen)) |
| return 0; |
| *len -= suflen; |
| return 1; |
| } |
| |
| /* |
| * If str ends with suffix, return 1 and set *len to the size of the string |
| * without the suffix. Otherwise, return 0 and set *len to the size of the |
| * string. |
| * |
| * Note that we do _not_ NUL-terminate str to the new length. |
| */ |
| static inline int strip_suffix(const char *str, const char *suffix, size_t *len) |
| { |
| *len = strlen(str); |
| return strip_suffix_mem(str, len, suffix); |
| } |
| |
| static inline int ends_with(const char *str, const char *suffix) |
| { |
| size_t len; |
| return strip_suffix(str, suffix, &len); |
| } |
| |
| #define SWAP(a, b) do { \ |
| void *_swap_a_ptr = &(a); \ |
| void *_swap_b_ptr = &(b); \ |
| unsigned char _swap_buffer[sizeof(a)]; \ |
| memcpy(_swap_buffer, _swap_a_ptr, sizeof(a)); \ |
| memcpy(_swap_a_ptr, _swap_b_ptr, sizeof(a) + \ |
| BUILD_ASSERT_OR_ZERO(sizeof(a) == sizeof(b))); \ |
| memcpy(_swap_b_ptr, _swap_buffer, sizeof(a)); \ |
| } while (0) |
| |
| #if defined(NO_MMAP) || defined(USE_WIN32_MMAP) |
| |
| #ifndef PROT_READ |
| #define PROT_READ 1 |
| #define PROT_WRITE 2 |
| #define MAP_PRIVATE 1 |
| #endif |
| |
| #define mmap git_mmap |
| #define munmap git_munmap |
| void *git_mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset); |
| int git_munmap(void *start, size_t length); |
| |
| #else /* NO_MMAP || USE_WIN32_MMAP */ |
| |
| #include <sys/mman.h> |
| |
| #endif /* NO_MMAP || USE_WIN32_MMAP */ |
| |
| #ifdef NO_MMAP |
| |
| /* This value must be multiple of (pagesize * 2) */ |
| #define DEFAULT_PACKED_GIT_WINDOW_SIZE (1 * 1024 * 1024) |
| |
| #else /* NO_MMAP */ |
| |
| /* This value must be multiple of (pagesize * 2) */ |
| #define DEFAULT_PACKED_GIT_WINDOW_SIZE \ |
| (sizeof(void*) >= 8 \ |
| ? 1 * 1024 * 1024 * 1024 \ |
| : 32 * 1024 * 1024) |
| |
| #endif /* NO_MMAP */ |
| |
| #ifndef MAP_FAILED |
| #define MAP_FAILED ((void *)-1) |
| #endif |
| |
| #ifdef NO_ST_BLOCKS_IN_STRUCT_STAT |
| #define on_disk_bytes(st) ((st).st_size) |
| #else |
| #define on_disk_bytes(st) ((st).st_blocks * 512) |
| #endif |
| |
| #ifdef NEEDS_MODE_TRANSLATION |
| #undef S_IFMT |
| #undef S_IFREG |
| #undef S_IFDIR |
| #undef S_IFLNK |
| #undef S_IFBLK |
| #undef S_IFCHR |
| #undef S_IFIFO |
| #undef S_IFSOCK |
| #define S_IFMT 0170000 |
| #define S_IFREG 0100000 |
| #define S_IFDIR 0040000 |
| #define S_IFLNK 0120000 |
| #define S_IFBLK 0060000 |
| #define S_IFCHR 0020000 |
| #define S_IFIFO 0010000 |
| #define S_IFSOCK 0140000 |
| #ifdef stat |
| #undef stat |
| #endif |
| #define stat(path, buf) git_stat(path, buf) |
| int git_stat(const char *, struct stat *); |
| #ifdef fstat |
| #undef fstat |
| #endif |
| #define fstat(fd, buf) git_fstat(fd, buf) |
| int git_fstat(int, struct stat *); |
| #ifdef lstat |
| #undef lstat |
| #endif |
| #define lstat(path, buf) git_lstat(path, buf) |
| int git_lstat(const char *, struct stat *); |
| #endif |
| |
| #define DEFAULT_PACKED_GIT_LIMIT \ |
| ((1024L * 1024L) * (size_t)(sizeof(void*) >= 8 ? (32 * 1024L * 1024L) : 256)) |
| |
| #ifdef NO_PREAD |
| #define pread git_pread |
| ssize_t git_pread(int fd, void *buf, size_t count, off_t offset); |
| #endif |
| /* |
| * Forward decl that will remind us if its twin in cache.h changes. |
| * This function is used in compat/pread.c. But we can't include |
| * cache.h there. |
| */ |
| ssize_t read_in_full(int fd, void *buf, size_t count); |
| |
| #ifdef NO_SETENV |
| #define setenv gitsetenv |
| int gitsetenv(const char *, const char *, int); |
| #endif |
| |
| #ifdef NO_MKDTEMP |
| #define mkdtemp gitmkdtemp |
| char *gitmkdtemp(char *); |
| #endif |
| |
| #ifdef NO_UNSETENV |
| #define unsetenv gitunsetenv |
| int gitunsetenv(const char *); |
| #endif |
| |
| #ifdef NO_STRCASESTR |
| #define strcasestr gitstrcasestr |
| char *gitstrcasestr(const char *haystack, const char *needle); |
| #endif |
| |
| #ifdef NO_STRLCPY |
| #define strlcpy gitstrlcpy |
| size_t gitstrlcpy(char *, const char *, size_t); |
| #endif |
| |
| #ifdef NO_STRTOUMAX |
| #define strtoumax gitstrtoumax |
| uintmax_t gitstrtoumax(const char *, char **, int); |
| #define strtoimax gitstrtoimax |
| intmax_t gitstrtoimax(const char *, char **, int); |
| #endif |
| |
| #ifdef NO_HSTRERROR |
| #define hstrerror githstrerror |
| const char *githstrerror(int herror); |
| #endif |
| |
| #ifdef NO_MEMMEM |
| #define memmem gitmemmem |
| void *gitmemmem(const void *haystack, size_t haystacklen, |
| const void *needle, size_t needlelen); |
| #endif |
| |
| #ifdef OVERRIDE_STRDUP |
| #ifdef strdup |
| #undef strdup |
| #endif |
| #define strdup gitstrdup |
| char *gitstrdup(const char *s); |
| #endif |
| |
| #ifdef NO_GETPAGESIZE |
| #define getpagesize() sysconf(_SC_PAGESIZE) |
| #endif |
| |
| #ifndef O_CLOEXEC |
| #define O_CLOEXEC 0 |
| #endif |
| |
| #ifdef FREAD_READS_DIRECTORIES |
| # if !defined(SUPPRESS_FOPEN_REDEFINITION) |
| # ifdef fopen |
| # undef fopen |
| # endif |
| # define fopen(a,b) git_fopen(a,b) |
| # endif |
| FILE *git_fopen(const char*, const char*); |
| #endif |
| |
| #ifdef SNPRINTF_RETURNS_BOGUS |
| #ifdef snprintf |
| #undef snprintf |
| #endif |
| #define snprintf git_snprintf |
| int git_snprintf(char *str, size_t maxsize, |
| const char *format, ...); |
| #ifdef vsnprintf |
| #undef vsnprintf |
| #endif |
| #define vsnprintf git_vsnprintf |
| int git_vsnprintf(char *str, size_t maxsize, |
| const char *format, va_list ap); |
| #endif |
| |
| #ifdef OPEN_RETURNS_EINTR |
| #undef open |
| #define open git_open_with_retry |
| int git_open_with_retry(const char *path, int flag, ...); |
| #endif |
| |
| #ifdef __GLIBC_PREREQ |
| #if __GLIBC_PREREQ(2, 1) |
| #define HAVE_STRCHRNUL |
| #endif |
| #endif |
| |
| #ifndef HAVE_STRCHRNUL |
| #define strchrnul gitstrchrnul |
| static inline char *gitstrchrnul(const char *s, int c) |
| { |
| while (*s && *s != c) |
| s++; |
| return (char *)s; |
| } |
| #endif |
| |
| #ifdef NO_INET_PTON |
| int inet_pton(int af, const char *src, void *dst); |
| #endif |
| |
| #ifdef NO_INET_NTOP |
| const char *inet_ntop(int af, const void *src, char *dst, size_t size); |
| #endif |
| |
| #ifdef NO_PTHREADS |
| #define atexit git_atexit |
| int git_atexit(void (*handler)(void)); |
| #endif |
| |
| static inline size_t st_add(size_t a, size_t b) |
| { |
| if (unsigned_add_overflows(a, b)) |
| die("size_t overflow: %"PRIuMAX" + %"PRIuMAX, |
| (uintmax_t)a, (uintmax_t)b); |
| return a + b; |
| } |
| #define st_add3(a,b,c) st_add(st_add((a),(b)),(c)) |
| #define st_add4(a,b,c,d) st_add(st_add3((a),(b),(c)),(d)) |
| |
| static inline size_t st_mult(size_t a, size_t b) |
| { |
| if (unsigned_mult_overflows(a, b)) |
| die("size_t overflow: %"PRIuMAX" * %"PRIuMAX, |
| (uintmax_t)a, (uintmax_t)b); |
| return a * b; |
| } |
| |
| static inline size_t st_sub(size_t a, size_t b) |
| { |
| if (a < b) |
| die("size_t underflow: %"PRIuMAX" - %"PRIuMAX, |
| (uintmax_t)a, (uintmax_t)b); |
| return a - b; |
| } |
| |
| static inline size_t st_left_shift(size_t a, unsigned shift) |
| { |
| if (unsigned_left_shift_overflows(a, shift)) |
| die("size_t overflow: %"PRIuMAX" << %u", |
| (uintmax_t)a, shift); |
| return a << shift; |
| } |
| |
| static inline unsigned long cast_size_t_to_ulong(size_t a) |
| { |
| if (a != (unsigned long)a) |
| die("object too large to read on this platform: %" |
| PRIuMAX" is cut off to %lu", |
| (uintmax_t)a, (unsigned long)a); |
| return (unsigned long)a; |
| } |
| |
| #ifdef HAVE_ALLOCA_H |
| # include <alloca.h> |
| # define xalloca(size) (alloca(size)) |
| # define xalloca_free(p) do {} while (0) |
| #else |
| # define xalloca(size) (xmalloc(size)) |
| # define xalloca_free(p) (free(p)) |
| #endif |
| char *xstrdup(const char *str); |
| void *xmalloc(size_t size); |
| void *xmallocz(size_t size); |
| void *xmallocz_gently(size_t size); |
| void *xmemdupz(const void *data, size_t len); |
| char *xstrndup(const char *str, size_t len); |
| void *xrealloc(void *ptr, size_t size); |
| void *xcalloc(size_t nmemb, size_t size); |
| void xsetenv(const char *name, const char *value, int overwrite); |
| void *xmmap(void *start, size_t length, int prot, int flags, int fd, off_t offset); |
| const char *mmap_os_err(void); |
| void *xmmap_gently(void *start, size_t length, int prot, int flags, int fd, off_t offset); |
| int xopen(const char *path, int flags, ...); |
| ssize_t xread(int fd, void *buf, size_t len); |
| ssize_t xwrite(int fd, const void *buf, size_t len); |
| ssize_t xpread(int fd, void *buf, size_t len, off_t offset); |
| int xdup(int fd); |
| FILE *xfopen(const char *path, const char *mode); |
| FILE *xfdopen(int fd, const char *mode); |
| int xmkstemp(char *temp_filename); |
| int xmkstemp_mode(char *temp_filename, int mode); |
| char *xgetcwd(void); |
| FILE *fopen_for_writing(const char *path); |
| FILE *fopen_or_warn(const char *path, const char *mode); |
| |
| /* |
| * Like strncmp, but only return zero if s is NUL-terminated and exactly len |
| * characters long. If it is not, consider it greater than t. |
| */ |
| int xstrncmpz(const char *s, const char *t, size_t len); |
| |
| /* |
| * FREE_AND_NULL(ptr) is like free(ptr) followed by ptr = NULL. Note |
| * that ptr is used twice, so don't pass e.g. ptr++. |
| */ |
| #define FREE_AND_NULL(p) do { free(p); (p) = NULL; } while (0) |
| |
| #define ALLOC_ARRAY(x, alloc) (x) = xmalloc(st_mult(sizeof(*(x)), (alloc))) |
| #define CALLOC_ARRAY(x, alloc) (x) = xcalloc((alloc), sizeof(*(x))) |
| #define REALLOC_ARRAY(x, alloc) (x) = xrealloc((x), st_mult(sizeof(*(x)), (alloc))) |
| |
| #define COPY_ARRAY(dst, src, n) copy_array((dst), (src), (n), sizeof(*(dst)) + \ |
| BUILD_ASSERT_OR_ZERO(sizeof(*(dst)) == sizeof(*(src)))) |
| static inline void copy_array(void *dst, const void *src, size_t n, size_t size) |
| { |
| if (n) |
| memcpy(dst, src, st_mult(size, n)); |
| } |
| |
| #define MOVE_ARRAY(dst, src, n) move_array((dst), (src), (n), sizeof(*(dst)) + \ |
| BUILD_ASSERT_OR_ZERO(sizeof(*(dst)) == sizeof(*(src)))) |
| static inline void move_array(void *dst, const void *src, size_t n, size_t size) |
| { |
| if (n) |
| memmove(dst, src, st_mult(size, n)); |
| } |
| |
| /* |
| * These functions help you allocate structs with flex arrays, and copy |
| * the data directly into the array. For example, if you had: |
| * |
| * struct foo { |
| * int bar; |
| * char name[FLEX_ARRAY]; |
| * }; |
| * |
| * you can do: |
| * |
| * struct foo *f; |
| * FLEX_ALLOC_MEM(f, name, src, len); |
| * |
| * to allocate a "foo" with the contents of "src" in the "name" field. |
| * The resulting struct is automatically zero'd, and the flex-array field |
| * is NUL-terminated (whether the incoming src buffer was or not). |
| * |
| * The FLEXPTR_* variants operate on structs that don't use flex-arrays, |
| * but do want to store a pointer to some extra data in the same allocated |
| * block. For example, if you have: |
| * |
| * struct foo { |
| * char *name; |
| * int bar; |
| * }; |
| * |
| * you can do: |
| * |
| * struct foo *f; |
| * FLEXPTR_ALLOC_STR(f, name, src); |
| * |
| * and "name" will point to a block of memory after the struct, which will be |
| * freed along with the struct (but the pointer can be repointed anywhere). |
| * |
| * The *_STR variants accept a string parameter rather than a ptr/len |
| * combination. |
| * |
| * Note that these macros will evaluate the first parameter multiple |
| * times, and it must be assignable as an lvalue. |
| */ |
| #define FLEX_ALLOC_MEM(x, flexname, buf, len) do { \ |
| size_t flex_array_len_ = (len); \ |
| (x) = xcalloc(1, st_add3(sizeof(*(x)), flex_array_len_, 1)); \ |
| memcpy((void *)(x)->flexname, (buf), flex_array_len_); \ |
| } while (0) |
| #define FLEXPTR_ALLOC_MEM(x, ptrname, buf, len) do { \ |
| size_t flex_array_len_ = (len); \ |
| (x) = xcalloc(1, st_add3(sizeof(*(x)), flex_array_len_, 1)); \ |
| memcpy((x) + 1, (buf), flex_array_len_); \ |
| (x)->ptrname = (void *)((x)+1); \ |
| } while(0) |
| #define FLEX_ALLOC_STR(x, flexname, str) \ |
| FLEX_ALLOC_MEM((x), flexname, (str), strlen(str)) |
| #define FLEXPTR_ALLOC_STR(x, ptrname, str) \ |
| FLEXPTR_ALLOC_MEM((x), ptrname, (str), strlen(str)) |
| |
| static inline char *xstrdup_or_null(const char *str) |
| { |
| return str ? xstrdup(str) : NULL; |
| } |
| |
| static inline size_t xsize_t(off_t len) |
| { |
| if (len < 0 || (uintmax_t) len > SIZE_MAX) |
| die("Cannot handle files this big"); |
| return (size_t) len; |
| } |
| |
| __attribute__((format (printf, 3, 4))) |
| int xsnprintf(char *dst, size_t max, const char *fmt, ...); |
| |
| #ifndef HOST_NAME_MAX |
| #define HOST_NAME_MAX 256 |
| #endif |
| |
| int xgethostname(char *buf, size_t len); |
| |
| /* in ctype.c, for kwset users */ |
| extern const unsigned char tolower_trans_tbl[256]; |
| |
| /* Sane ctype - no locale, and works with signed chars */ |
| #undef isascii |
| #undef isspace |
| #undef isdigit |
| #undef isalpha |
| #undef isalnum |
| #undef isprint |
| #undef islower |
| #undef isupper |
| #undef tolower |
| #undef toupper |
| #undef iscntrl |
| #undef ispunct |
| #undef isxdigit |
| |
| extern const unsigned char sane_ctype[256]; |
| #define GIT_SPACE 0x01 |
| #define GIT_DIGIT 0x02 |
| #define GIT_ALPHA 0x04 |
| #define GIT_GLOB_SPECIAL 0x08 |
| #define GIT_REGEX_SPECIAL 0x10 |
| #define GIT_PATHSPEC_MAGIC 0x20 |
| #define GIT_CNTRL 0x40 |
| #define GIT_PUNCT 0x80 |
| #define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0) |
| #define isascii(x) (((x) & ~0x7f) == 0) |
| #define isspace(x) sane_istest(x,GIT_SPACE) |
| #define isdigit(x) sane_istest(x,GIT_DIGIT) |
| #define isalpha(x) sane_istest(x,GIT_ALPHA) |
| #define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT) |
| #define isprint(x) ((x) >= 0x20 && (x) <= 0x7e) |
| #define islower(x) sane_iscase(x, 1) |
| #define isupper(x) sane_iscase(x, 0) |
| #define is_glob_special(x) sane_istest(x,GIT_GLOB_SPECIAL) |
| #define is_regex_special(x) sane_istest(x,GIT_GLOB_SPECIAL | GIT_REGEX_SPECIAL) |
| #define iscntrl(x) (sane_istest(x,GIT_CNTRL)) |
| #define ispunct(x) sane_istest(x, GIT_PUNCT | GIT_REGEX_SPECIAL | \ |
| GIT_GLOB_SPECIAL | GIT_PATHSPEC_MAGIC) |
| #define isxdigit(x) (hexval_table[(unsigned char)(x)] != -1) |
| #define tolower(x) sane_case((unsigned char)(x), 0x20) |
| #define toupper(x) sane_case((unsigned char)(x), 0) |
| #define is_pathspec_magic(x) sane_istest(x,GIT_PATHSPEC_MAGIC) |
| |
| static inline int sane_case(int x, int high) |
| { |
| if (sane_istest(x, GIT_ALPHA)) |
| x = (x & ~0x20) | high; |
| return x; |
| } |
| |
| static inline int sane_iscase(int x, int is_lower) |
| { |
| if (!sane_istest(x, GIT_ALPHA)) |
| return 0; |
| |
| if (is_lower) |
| return (x & 0x20) != 0; |
| else |
| return (x & 0x20) == 0; |
| } |
| |
| /* |
| * Like skip_prefix, but compare case-insensitively. Note that the comparison |
| * is done via tolower(), so it is strictly ASCII (no multi-byte characters or |
| * locale-specific conversions). |
| */ |
| static inline int skip_iprefix(const char *str, const char *prefix, |
| const char **out) |
| { |
| do { |
| if (!*prefix) { |
| *out = str; |
| return 1; |
| } |
| } while (tolower(*str++) == tolower(*prefix++)); |
| return 0; |
| } |
| |
| static inline int strtoul_ui(char const *s, int base, unsigned int *result) |
| { |
| unsigned long ul; |
| char *p; |
| |
| errno = 0; |
| /* negative values would be accepted by strtoul */ |
| if (strchr(s, '-')) |
| return -1; |
| ul = strtoul(s, &p, base); |
| if (errno || *p || p == s || (unsigned int) ul != ul) |
| return -1; |
| *result = ul; |
| return 0; |
| } |
| |
| static inline int strtol_i(char const *s, int base, int *result) |
| { |
| long ul; |
| char *p; |
| |
| errno = 0; |
| ul = strtol(s, &p, base); |
| if (errno || *p || p == s || (int) ul != ul) |
| return -1; |
| *result = ul; |
| return 0; |
| } |
| |
| void git_stable_qsort(void *base, size_t nmemb, size_t size, |
| int(*compar)(const void *, const void *)); |
| #ifdef INTERNAL_QSORT |
| #define qsort git_stable_qsort |
| #endif |
| |
| #define QSORT(base, n, compar) sane_qsort((base), (n), sizeof(*(base)), compar) |
| static inline void sane_qsort(void *base, size_t nmemb, size_t size, |
| int(*compar)(const void *, const void *)) |
| { |
| if (nmemb > 1) |
| qsort(base, nmemb, size, compar); |
| } |
| |
| #define STABLE_QSORT(base, n, compar) \ |
| git_stable_qsort((base), (n), sizeof(*(base)), compar) |
| |
| #ifndef HAVE_ISO_QSORT_S |
| int git_qsort_s(void *base, size_t nmemb, size_t size, |
| int (*compar)(const void *, const void *, void *), void *ctx); |
| #define qsort_s git_qsort_s |
| #endif |
| |
| #define QSORT_S(base, n, compar, ctx) do { \ |
| if (qsort_s((base), (n), sizeof(*(base)), compar, ctx)) \ |
| BUG("qsort_s() failed"); \ |
| } while (0) |
| |
| #ifndef REG_STARTEND |
| #error "Git requires REG_STARTEND support. Compile with NO_REGEX=NeedsStartEnd" |
| #endif |
| |
| static inline int regexec_buf(const regex_t *preg, const char *buf, size_t size, |
| size_t nmatch, regmatch_t pmatch[], int eflags) |
| { |
| assert(nmatch > 0 && pmatch); |
| pmatch[0].rm_so = 0; |
| pmatch[0].rm_eo = size; |
| return regexec(preg, buf, nmatch, pmatch, eflags | REG_STARTEND); |
| } |
| |
| #ifndef DIR_HAS_BSD_GROUP_SEMANTICS |
| # define FORCE_DIR_SET_GID S_ISGID |
| #else |
| # define FORCE_DIR_SET_GID 0 |
| #endif |
| |
| #ifdef NO_NSEC |
| #undef USE_NSEC |
| #define ST_CTIME_NSEC(st) 0 |
| #define ST_MTIME_NSEC(st) 0 |
| #else |
| #ifdef USE_ST_TIMESPEC |
| #define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctimespec.tv_nsec)) |
| #define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtimespec.tv_nsec)) |
| #else |
| #define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctim.tv_nsec)) |
| #define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtim.tv_nsec)) |
| #endif |
| #endif |
| |
| #ifdef UNRELIABLE_FSTAT |
| #define fstat_is_reliable() 0 |
| #else |
| #define fstat_is_reliable() 1 |
| #endif |
| |
| #ifndef va_copy |
| /* |
| * Since an obvious implementation of va_list would be to make it a |
| * pointer into the stack frame, a simple assignment will work on |
| * many systems. But let's try to be more portable. |
| */ |
| #ifdef __va_copy |
| #define va_copy(dst, src) __va_copy(dst, src) |
| #else |
| #define va_copy(dst, src) ((dst) = (src)) |
| #endif |
| #endif |
| |
| /* usage.c: only to be used for testing BUG() implementation (see test-tool) */ |
| extern int BUG_exit_code; |
| |
| __attribute__((format (printf, 3, 4))) NORETURN |
| void BUG_fl(const char *file, int line, const char *fmt, ...); |
| #define BUG(...) BUG_fl(__FILE__, __LINE__, __VA_ARGS__) |
| |
| #ifdef __APPLE__ |
| #define FSYNC_METHOD_DEFAULT FSYNC_METHOD_WRITEOUT_ONLY |
| #else |
| #define FSYNC_METHOD_DEFAULT FSYNC_METHOD_FSYNC |
| #endif |
| |
| enum fsync_action { |
| FSYNC_WRITEOUT_ONLY, |
| FSYNC_HARDWARE_FLUSH |
| }; |
| |
| /* |
| * Issues an fsync against the specified file according to the specified mode. |
| * |
| * FSYNC_WRITEOUT_ONLY attempts to use interfaces available on some operating |
| * systems to flush the OS cache without issuing a flush command to the storage |
| * controller. If those interfaces are unavailable, the function fails with |
| * ENOSYS. |
| * |
| * FSYNC_HARDWARE_FLUSH does an OS writeout and hardware flush to ensure that |
| * changes are durable. It is not expected to fail. |
| */ |
| int git_fsync(int fd, enum fsync_action action); |
| |
| /* |
| * Writes out trace statistics for fsync using the trace2 API. |
| */ |
| void trace_git_fsync_stats(void); |
| |
| /* |
| * Preserves errno, prints a message, but gives no warning for ENOENT. |
| * Returns 0 on success, which includes trying to unlink an object that does |
| * not exist. |
| */ |
| int unlink_or_warn(const char *path); |
| /* |
| * Tries to unlink file. Returns 0 if unlink succeeded |
| * or the file already didn't exist. Returns -1 and |
| * appends a message to err suitable for |
| * 'error("%s", err->buf)' on error. |
| */ |
| int unlink_or_msg(const char *file, struct strbuf *err); |
| /* |
| * Preserves errno, prints a message, but gives no warning for ENOENT. |
| * Returns 0 on success, which includes trying to remove a directory that does |
| * not exist. |
| */ |
| int rmdir_or_warn(const char *path); |
| /* |
| * Calls the correct function out of {unlink,rmdir}_or_warn based on |
| * the supplied file mode. |
| */ |
| int remove_or_warn(unsigned int mode, const char *path); |
| |
| /* |
| * Call access(2), but warn for any error except "missing file" |
| * (ENOENT or ENOTDIR). |
| */ |
| #define ACCESS_EACCES_OK (1U << 0) |
| int access_or_warn(const char *path, int mode, unsigned flag); |
| int access_or_die(const char *path, int mode, unsigned flag); |
| |
| /* Warn on an inaccessible file if errno indicates this is an error */ |
| int warn_on_fopen_errors(const char *path); |
| |
| /* |
| * Open with O_NOFOLLOW, or equivalent. Note that the fallback equivalent |
| * may be racy. Do not use this as protection against an attacker who can |
| * simultaneously create paths. |
| */ |
| int open_nofollow(const char *path, int flags); |
| |
| #ifndef SHELL_PATH |
| # define SHELL_PATH "/bin/sh" |
| #endif |
| |
| #ifndef _POSIX_THREAD_SAFE_FUNCTIONS |
| static inline void flockfile(FILE *fh) |
| { |
| ; /* nothing */ |
| } |
| static inline void funlockfile(FILE *fh) |
| { |
| ; /* nothing */ |
| } |
| #define getc_unlocked(fh) getc(fh) |
| #endif |
| |
| #ifdef FILENO_IS_A_MACRO |
| int git_fileno(FILE *stream); |
| # ifndef COMPAT_CODE_FILENO |
| # undef fileno |
| # define fileno(p) git_fileno(p) |
| # endif |
| #endif |
| |
| #ifdef NEED_ACCESS_ROOT_HANDLER |
| int git_access(const char *path, int mode); |
| # ifndef COMPAT_CODE_ACCESS |
| # ifdef access |
| # undef access |
| # endif |
| # define access(path, mode) git_access(path, mode) |
| # endif |
| #endif |
| |
| /* |
| * Our code often opens a path to an optional file, to work on its |
| * contents when we can successfully open it. We can ignore a failure |
| * to open if such an optional file does not exist, but we do want to |
| * report a failure in opening for other reasons (e.g. we got an I/O |
| * error, or the file is there, but we lack the permission to open). |
| * |
| * Call this function after seeing an error from open() or fopen() to |
| * see if the errno indicates a missing file that we can safely ignore. |
| */ |
| static inline int is_missing_file_error(int errno_) |
| { |
| return (errno_ == ENOENT || errno_ == ENOTDIR); |
| } |
| |
| int cmd_main(int, const char **); |
| |
| /* |
| * Intercept all calls to exit() and route them to trace2 to |
| * optionally emit a message before calling the real exit(). |
| */ |
| int trace2_cmd_exit_fl(const char *file, int line, int code); |
| #define exit(code) exit(trace2_cmd_exit_fl(__FILE__, __LINE__, (code))) |
| |
| /* |
| * You can mark a stack variable with UNLEAK(var) to avoid it being |
| * reported as a leak by tools like LSAN or valgrind. The argument |
| * should generally be the variable itself (not its address and not what |
| * it points to). It's safe to use this on pointers which may already |
| * have been freed, or on pointers which may still be in use. |
| * |
| * Use this _only_ for a variable that leaks by going out of scope at |
| * program exit (so only from cmd_* functions or their direct helpers). |
| * Normal functions, especially those which may be called multiple |
| * times, should actually free their memory. This is only meant as |
| * an annotation, and does nothing in non-leak-checking builds. |
| */ |
| #ifdef SUPPRESS_ANNOTATED_LEAKS |
| void unleak_memory(const void *ptr, size_t len); |
| #define UNLEAK(var) unleak_memory(&(var), sizeof(var)) |
| #else |
| #define UNLEAK(var) do {} while (0) |
| #endif |
| |
| #define z_const |
| #include <zlib.h> |
| |
| #if ZLIB_VERNUM < 0x1290 |
| /* |
| * This is uncompress2, which is only available in zlib >= 1.2.9 |
| * (released as of early 2017). See compat/zlib-uncompress2.c. |
| */ |
| int uncompress2(Bytef *dest, uLongf *destLen, const Bytef *source, |
| uLong *sourceLen); |
| #endif |
| |
| /* |
| * This include must come after system headers, since it introduces macros that |
| * replace system names. |
| */ |
| #include "banned.h" |
| |
| /* |
| * container_of - Get the address of an object containing a field. |
| * |
| * @ptr: pointer to the field. |
| * @type: type of the object. |
| * @member: name of the field within the object. |
| */ |
| #define container_of(ptr, type, member) \ |
| ((type *) ((char *)(ptr) - offsetof(type, member))) |
| |
| /* |
| * helper function for `container_of_or_null' to avoid multiple |
| * evaluation of @ptr |
| */ |
| static inline void *container_of_or_null_offset(void *ptr, size_t offset) |
| { |
| return ptr ? (char *)ptr - offset : NULL; |
| } |
| |
| /* |
| * like `container_of', but allows returned value to be NULL |
| */ |
| #define container_of_or_null(ptr, type, member) \ |
| (type *)container_of_or_null_offset(ptr, offsetof(type, member)) |
| |
| /* |
| * like offsetof(), but takes a pointer to a variable of type which |
| * contains @member, instead of a specified type. |
| * @ptr is subject to multiple evaluation since we can't rely on __typeof__ |
| * everywhere. |
| */ |
| #if defined(__GNUC__) /* clang sets this, too */ |
| #define OFFSETOF_VAR(ptr, member) offsetof(__typeof__(*ptr), member) |
| #else /* !__GNUC__ */ |
| #define OFFSETOF_VAR(ptr, member) \ |
| ((uintptr_t)&(ptr)->member - (uintptr_t)(ptr)) |
| #endif /* !__GNUC__ */ |
| |
| void sleep_millisec(int millisec); |
| |
| /* |
| * Generate len bytes from the system cryptographically secure PRNG. |
| * Returns 0 on success and -1 on error, setting errno. The inability to |
| * satisfy the full request is an error. |
| */ |
| int csprng_bytes(void *buf, size_t len); |
| |
| #endif |