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compat: add a mkstemps() compatibility function
mkstemps() is a BSD extension so provide an implementation for cross-platform use. Signed-off-by: David Aguilar <davvid@gmail.com> Tested-by: Johannes Sixt <j6t@kdbg.org> (Windows) Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
David Aguilar
Junio C Hamano
parent
33fd7169ed
commit
0620b39b3b
19
Makefile
19
Makefile
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@ -52,6 +52,8 @@ all::
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#
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# Define NO_MKDTEMP if you don't have mkdtemp in the C library.
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#
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# Define NO_MKSTEMPS if you don't have mkstemps in the C library.
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#
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# Define NO_SYS_SELECT_H if you don't have sys/select.h.
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#
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# Define NO_SYMLINK_HEAD if you never want .git/HEAD to be a symbolic link.
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@ -636,10 +638,12 @@ EXTLIBS =
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ifeq ($(uname_S),Linux)
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NO_STRLCPY = YesPlease
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NO_MKSTEMPS = YesPlease
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THREADED_DELTA_SEARCH = YesPlease
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endif
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ifeq ($(uname_S),GNU/kFreeBSD)
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NO_STRLCPY = YesPlease
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NO_MKSTEMPS = YesPlease
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THREADED_DELTA_SEARCH = YesPlease
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endif
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ifeq ($(uname_S),UnixWare)
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@ -651,6 +655,7 @@ ifeq ($(uname_S),UnixWare)
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SHELL_PATH = /usr/local/bin/bash
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NO_IPV6 = YesPlease
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NO_HSTRERROR = YesPlease
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NO_MKSTEMPS = YesPlease
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BASIC_CFLAGS += -Kthread
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BASIC_CFLAGS += -I/usr/local/include
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BASIC_LDFLAGS += -L/usr/local/lib
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@ -674,6 +679,7 @@ ifeq ($(uname_S),SCO_SV)
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SHELL_PATH = /usr/bin/bash
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NO_IPV6 = YesPlease
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NO_HSTRERROR = YesPlease
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NO_MKSTEMPS = YesPlease
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BASIC_CFLAGS += -I/usr/local/include
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BASIC_LDFLAGS += -L/usr/local/lib
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NO_STRCASESTR = YesPlease
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@ -702,6 +708,7 @@ ifeq ($(uname_S),SunOS)
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NO_MEMMEM = YesPlease
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NO_HSTRERROR = YesPlease
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NO_MKDTEMP = YesPlease
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NO_MKSTEMPS = YesPlease
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OLD_ICONV = UnfortunatelyYes
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ifeq ($(uname_R),5.8)
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NO_UNSETENV = YesPlease
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@ -724,6 +731,7 @@ ifeq ($(uname_O),Cygwin)
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NO_D_INO_IN_DIRENT = YesPlease
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NO_STRCASESTR = YesPlease
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NO_MEMMEM = YesPlease
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NO_MKSTEMPS = YesPlease
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NO_SYMLINK_HEAD = YesPlease
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NEEDS_LIBICONV = YesPlease
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NO_FAST_WORKING_DIRECTORY = UnfortunatelyYes
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@ -767,11 +775,13 @@ ifeq ($(uname_S),NetBSD)
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BASIC_LDFLAGS += -L/usr/pkg/lib $(CC_LD_DYNPATH)/usr/pkg/lib
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THREADED_DELTA_SEARCH = YesPlease
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USE_ST_TIMESPEC = YesPlease
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NO_MKSTEMPS = YesPlease
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endif
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ifeq ($(uname_S),AIX)
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NO_STRCASESTR=YesPlease
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NO_MEMMEM = YesPlease
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NO_MKDTEMP = YesPlease
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NO_MKSTEMPS = YesPlease
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NO_STRLCPY = YesPlease
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NO_NSEC = YesPlease
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FREAD_READS_DIRECTORIES = UnfortunatelyYes
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@ -787,12 +797,14 @@ endif
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ifeq ($(uname_S),GNU)
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# GNU/Hurd
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NO_STRLCPY=YesPlease
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NO_MKSTEMPS = YesPlease
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endif
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ifeq ($(uname_S),IRIX64)
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NO_IPV6=YesPlease
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NO_SETENV=YesPlease
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NO_STRCASESTR=YesPlease
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NO_MEMMEM = YesPlease
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NO_MKSTEMPS = YesPlease
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NO_STRLCPY = YesPlease
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NO_SOCKADDR_STORAGE=YesPlease
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SHELL_PATH=/usr/gnu/bin/bash
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@ -805,6 +817,7 @@ ifeq ($(uname_S),HP-UX)
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NO_SETENV=YesPlease
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NO_STRCASESTR=YesPlease
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NO_MEMMEM = YesPlease
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NO_MKSTEMPS = YesPlease
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NO_STRLCPY = YesPlease
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NO_MKDTEMP = YesPlease
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NO_UNSETENV = YesPlease
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@ -834,6 +847,7 @@ ifneq (,$(findstring MINGW,$(uname_S)))
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NO_C99_FORMAT = YesPlease
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NO_STRTOUMAX = YesPlease
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NO_MKDTEMP = YesPlease
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NO_MKSTEMPS = YesPlease
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SNPRINTF_RETURNS_BOGUS = YesPlease
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NO_SVN_TESTS = YesPlease
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NO_PERL_MAKEMAKER = YesPlease
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@ -853,6 +867,7 @@ ifneq (,$(findstring MINGW,$(uname_S)))
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endif
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ifneq (,$(findstring arm,$(uname_M)))
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ARM_SHA1 = YesPlease
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NO_MKSTEMPS = YesPlease
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endif
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-include config.mak.autogen
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@ -1011,6 +1026,10 @@ ifdef NO_MKDTEMP
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COMPAT_CFLAGS += -DNO_MKDTEMP
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COMPAT_OBJS += compat/mkdtemp.o
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endif
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ifdef NO_MKSTEMPS
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COMPAT_CFLAGS += -DNO_MKSTEMPS
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COMPAT_OBJS += compat/mkstemps.o
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endif
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ifdef NO_UNSETENV
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COMPAT_CFLAGS += -DNO_UNSETENV
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COMPAT_OBJS += compat/unsetenv.o
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@ -0,0 +1,70 @@
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#include "../git-compat-util.h"
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/* Adapted from libiberty's mkstemp.c. */
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#undef TMP_MAX
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#define TMP_MAX 16384
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int gitmkstemps(char *pattern, int suffix_len)
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{
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static const char letters[] =
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"abcdefghijklmnopqrstuvwxyz"
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"ABCDEFGHIJKLMNOPQRSTUVWXYZ"
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"0123456789";
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static const int num_letters = 62;
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uint64_t value;
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struct timeval tv;
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char *template;
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size_t len;
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int fd, count;
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len = strlen(pattern);
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if (len < 6 + suffix_len) {
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errno = EINVAL;
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return -1;
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}
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if (strncmp(&pattern[len - 6 - suffix_len], "XXXXXX", 6)) {
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errno = EINVAL;
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return -1;
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}
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/*
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* Replace pattern's XXXXXX characters with randomness.
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* Try TMP_MAX different filenames.
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*/
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gettimeofday(&tv, NULL);
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value = ((size_t)(tv.tv_usec << 16)) ^ tv.tv_sec ^ getpid();
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template = &pattern[len - 6 - suffix_len];
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for (count = 0; count < TMP_MAX; ++count) {
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uint64_t v = value;
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/* Fill in the random bits. */
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template[0] = letters[v % num_letters]; v /= num_letters;
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template[1] = letters[v % num_letters]; v /= num_letters;
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template[2] = letters[v % num_letters]; v /= num_letters;
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template[3] = letters[v % num_letters]; v /= num_letters;
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template[4] = letters[v % num_letters]; v /= num_letters;
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template[5] = letters[v % num_letters]; v /= num_letters;
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fd = open(pattern, O_CREAT | O_EXCL | O_RDWR, 0600);
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if (fd > 0)
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return fd;
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/*
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* Fatal error (EPERM, ENOSPC etc).
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* It doesn't make sense to loop.
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*/
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if (errno != EEXIST)
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break;
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/*
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* This is a random value. It is only necessary that
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* the next TMP_MAX values generated by adding 7777 to
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* VALUE are different with (module 2^32).
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*/
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value += 7777;
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}
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/* We return the null string if we can't find a unique file name. */
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pattern[0] = '\0';
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errno = EINVAL;
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return -1;
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}
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@ -46,6 +46,7 @@ NO_STRTOUMAX=@NO_STRTOUMAX@
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NO_SETENV=@NO_SETENV@
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NO_UNSETENV=@NO_UNSETENV@
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NO_MKDTEMP=@NO_MKDTEMP@
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NO_MKSTEMPS=@NO_MKSTEMPS@
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NO_ICONV=@NO_ICONV@
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OLD_ICONV=@OLD_ICONV@
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NO_DEFLATE_BOUND=@NO_DEFLATE_BOUND@
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@ -677,6 +677,13 @@ GIT_CHECK_FUNC(mkdtemp,
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[NO_MKDTEMP=YesPlease])
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AC_SUBST(NO_MKDTEMP)
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#
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# Define NO_MKSTEMPS if you don't have mkstemps in the C library.
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GIT_CHECK_FUNC(mkstemps,
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[NO_MKSTEMPS=],
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[NO_MKSTEMPS=YesPlease])
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AC_SUBST(NO_MKSTEMPS)
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#
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#
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# Define NO_MMAP if you want to avoid mmap.
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#
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# Define NO_ICONV if your libc does not properly support iconv.
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@ -232,6 +232,11 @@ extern int gitsetenv(const char *, const char *, int);
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extern char *gitmkdtemp(char *);
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#endif
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#ifdef NO_MKSTEMPS
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#define mkstemps gitmkstemps
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extern int gitmkstemps(char *, int);
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#endif
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#ifdef NO_UNSETENV
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#define unsetenv gitunsetenv
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extern void gitunsetenv(const char *);
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