--- locale/programs/c.h | 407 ++++++++++++++++++++++ locale/programs/cross-localedef-hardlink.c | 528 +++++++++++++++++++++++++++++ locale/programs/xalloc.h | 129 +++++++ localedef/Makefile.in | 8 4 files changed, 1071 insertions(+), 1 deletion(-) --- /dev/null +++ b/locale/programs/cross-localedef-hardlink.c @@ -0,0 +1,528 @@ +/* + * hardlink - consolidate duplicate files via hardlinks + * + * Copyright (C) 2018 Red Hat, Inc. All rights reserved. + * Written by Jakub Jelinek + * + * Copyright (C) 2019 Karel Zak + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it would be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#ifdef HAVE_PCRE +# define PCRE2_CODE_UNIT_WIDTH 8 +# include +#endif + +#include "c.h" +#include "xalloc.h" +#include "nls.h" +#include "closestream.h" + +#define NHASH (1<<17) /* Must be a power of 2! */ +#define NBUF 64 + +struct hardlink_file; + +struct hardlink_hash { + struct hardlink_hash *next; + struct hardlink_file *chain; + off_t size; + time_t mtime; +}; + +struct hardlink_dir { + struct hardlink_dir *next; + char name[]; +}; + +struct hardlink_file { + struct hardlink_file *next; + ino_t ino; + dev_t dev; + unsigned int cksum; + char name[]; +}; + +struct hardlink_dynstr { + char *buf; + size_t alloc; +}; + +struct hardlink_ctl { + struct hardlink_dir *dirs; + struct hardlink_hash *hps[NHASH]; + char iobuf1[BUFSIZ]; + char iobuf2[BUFSIZ]; + /* summary counters */ + unsigned long long ndirs; + unsigned long long nobjects; + unsigned long long nregfiles; + unsigned long long ncomp; + unsigned long long nlinks; + unsigned long long nsaved; + /* current device */ + dev_t dev; + /* flags */ + unsigned int verbose; + unsigned int + no_link:1, + content_only:1, + force:1; +}; +/* ctl is in global scope due use in atexit() */ +struct hardlink_ctl global_ctl; + +__attribute__ ((always_inline)) +static inline unsigned int hash(off_t size, time_t mtime) +{ + return (size ^ mtime) & (NHASH - 1); +} + +__attribute__ ((always_inline)) +static inline int stcmp(struct stat *st1, struct stat *st2, int content_scope) +{ + if (content_scope) + return st1->st_size != st2->st_size; + + return st1->st_mode != st2->st_mode + || st1->st_uid != st2->st_uid + || st1->st_gid != st2->st_gid + || st1->st_size != st2->st_size + || st1->st_mtime != st2->st_mtime; +} + +static void print_summary(void) +{ + struct hardlink_ctl const *const ctl = &global_ctl; + + if (!ctl->verbose) + return; + + if (ctl->verbose > 1 && ctl->nlinks) + fputc('\n', stdout); + + printf(_("Directories: %9lld\n"), ctl->ndirs); + printf(_("Objects: %9lld\n"), ctl->nobjects); + printf(_("Regular files: %9lld\n"), ctl->nregfiles); + printf(_("Comparisons: %9lld\n"), ctl->ncomp); + printf( "%s%9lld\n", (ctl->no_link ? + _("Would link: ") : + _("Linked: ")), ctl->nlinks); + printf( "%s %9lld\n", (ctl->no_link ? + _("Would save: ") : + _("Saved: ")), ctl->nsaved); +} + +static void __attribute__((__noreturn__)) usage(void) +{ + fputs(USAGE_HEADER, stdout); + printf(_(" %s [options] directory...\n"), program_invocation_short_name); + + fputs(USAGE_SEPARATOR, stdout); + puts(_("Consolidate duplicate files using hardlinks.")); + + fputs(USAGE_OPTIONS, stdout); + puts(_(" -c, --content compare only contents, ignore permission, etc.")); + puts(_(" -n, --dry-run don't actually link anything")); + puts(_(" -v, --verbose print summary after hardlinking")); + puts(_(" -vv print every hardlinked file and summary")); + puts(_(" -f, --force force hardlinking across filesystems")); + puts(_(" -x, --exclude exclude files matching pattern")); + + fputs(USAGE_SEPARATOR, stdout); + printf(USAGE_HELP_OPTIONS(16)); /* char offset to align option descriptions */ + printf(USAGE_MAN_TAIL("hardlink(1)")); + exit(EXIT_SUCCESS); +} + +__attribute__ ((always_inline)) +static inline size_t add2(size_t a, size_t b) +{ + size_t sum = a + b; + + if (sum < a) + errx(EXIT_FAILURE, _("integer overflow")); + return sum; +} + +__attribute__ ((always_inline)) +static inline size_t add3(size_t a, size_t b, size_t c) +{ + return add2(add2(a, b), c); +} + +static void growstr(struct hardlink_dynstr *str, size_t newlen) +{ + if (newlen < str->alloc) + return; + str->buf = xrealloc(str->buf, str->alloc = add2(newlen, 1)); +} + +static void process_path(struct hardlink_ctl *ctl, const char *name) +{ + struct stat st, st2, st3; + const size_t namelen = strlen(name); + + ctl->nobjects++; + if (lstat(name, &st)) + return; + + if (st.st_dev != ctl->dev && !ctl->force) { + if (ctl->dev) + errx(EXIT_FAILURE, + _("%s is on different filesystem than the rest " + "(use -f option to override)."), name); + ctl->dev = st.st_dev; + } + if (S_ISDIR(st.st_mode)) { + struct hardlink_dir *dp = xmalloc(add3(sizeof(*dp), namelen, 1)); + memcpy(dp->name, name, namelen + 1); + dp->next = ctl->dirs; + ctl->dirs = dp; + + } else if (S_ISREG(st.st_mode)) { + int fd, i; + struct hardlink_file *fp, *fp2; + struct hardlink_hash *hp; + const char *n1, *n2; + unsigned int buf[NBUF]; + int cksumsize = sizeof(buf); + unsigned int cksum; + time_t mtime = ctl->content_only ? 0 : st.st_mtime; + unsigned int hsh = hash(st.st_size, mtime); + off_t fsize; + + ctl->nregfiles++; + if (ctl->verbose > 1) + printf("%s\n", name); + + fd = open(name, O_RDONLY); + if (fd < 0) + return; + + if ((size_t)st.st_size < sizeof(buf)) { + cksumsize = st.st_size; + memset(((char *)buf) + cksumsize, 0, + (sizeof(buf) - cksumsize) % sizeof(buf[0])); + } + if (read(fd, buf, cksumsize) != cksumsize) { + close(fd); + return; + } + cksumsize = (cksumsize + sizeof(buf[0]) - 1) / sizeof(buf[0]); + for (i = 0, cksum = 0; i < cksumsize; i++) { + if (cksum + buf[i] < cksum) + cksum += buf[i] + 1; + else + cksum += buf[i]; + } + for (hp = ctl->hps[hsh]; hp; hp = hp->next) { + if (hp->size == st.st_size && hp->mtime == mtime) + break; + } + if (!hp) { + hp = xmalloc(sizeof(*hp)); + hp->size = st.st_size; + hp->mtime = mtime; + hp->chain = NULL; + hp->next = ctl->hps[hsh]; + ctl->hps[hsh] = hp; + } + for (fp = hp->chain; fp; fp = fp->next) { + if (fp->cksum == cksum) + break; + } + for (fp2 = fp; fp2 && fp2->cksum == cksum; fp2 = fp2->next) { + if (fp2->ino == st.st_ino && fp2->dev == st.st_dev) { + close(fd); + return; + } + } + for (fp2 = fp; fp2 && fp2->cksum == cksum; fp2 = fp2->next) { + + if (!lstat(fp2->name, &st2) && S_ISREG(st2.st_mode) && + !stcmp(&st, &st2, ctl->content_only) && + st2.st_ino != st.st_ino && + st2.st_dev == st.st_dev) { + + int fd2 = open(fp2->name, O_RDONLY); + if (fd2 < 0) + continue; + + if (fstat(fd2, &st2) || !S_ISREG(st2.st_mode) + || st2.st_size == 0) { + close(fd2); + continue; + } + ctl->ncomp++; + lseek(fd, 0, SEEK_SET); + + for (fsize = st.st_size; fsize > 0; + fsize -= (off_t)sizeof(ctl->iobuf1)) { + ssize_t xsz; + ssize_t rsize = fsize > (ssize_t) sizeof(ctl->iobuf1) ? + (ssize_t) sizeof(ctl->iobuf1) : fsize; + + if ((xsz = read(fd, ctl->iobuf1, rsize)) != rsize) + warn(_("cannot read %s"), name); + else if ((xsz = read(fd2, ctl->iobuf2, rsize)) != rsize) + warn(_("cannot read %s"), fp2->name); + + if (xsz != rsize) { + close(fd); + close(fd2); + return; + } + if (memcmp(ctl->iobuf1, ctl->iobuf2, rsize)) + break; + } + close(fd2); + if (fsize > 0) + continue; + if (lstat(name, &st3)) { + warn(_("cannot stat %s"), name); + close(fd); + return; + } + st3.st_atime = st.st_atime; + if (stcmp(&st, &st3, 0)) { + warnx(_("file %s changed underneath us"), name); + close(fd); + return; + } + n1 = fp2->name; + n2 = name; + + if (!ctl->no_link) { + const char *suffix = + ".$$$___cleanit___$$$"; + const size_t suffixlen = strlen(suffix); + size_t n2len = strlen(n2); + struct hardlink_dynstr nam2 = { NULL, 0 }; + + growstr(&nam2, add2(n2len, suffixlen)); + memcpy(nam2.buf, n2, n2len); + memcpy(&nam2.buf[n2len], suffix, + suffixlen + 1); + /* First create a temporary link to n1 under a new name */ + if (link(n1, nam2.buf)) { + warn(_("failed to hardlink %s to %s (create temporary link as %s failed)"), + n1, n2, nam2.buf); + free(nam2.buf); + continue; + } + /* Then rename into place over the existing n2 */ + if (rename(nam2.buf, n2)) { + warn(_("failed to hardlink %s to %s (rename temporary link to %s failed)"), + n1, n2, n2); + /* Something went wrong, try to remove the now redundant temporary link */ + if (unlink(nam2.buf)) + warn(_("failed to remove temporary link %s"), nam2.buf); + free(nam2.buf); + continue; + } + free(nam2.buf); + } + ctl->nlinks++; + if (st3.st_nlink > 1) { + /* We actually did not save anything this time, since the link second argument + had some other links as well. */ + if (ctl->verbose > 1) + printf(_(" %s %s to %s\n"), + (ctl->no_link ? _("Would link") : _("Linked")), + n1, n2); + } else { + ctl->nsaved += ((st.st_size + 4095) / 4096) * 4096; + if (ctl->verbose > 1) + printf(_(" %s %s to %s, %s %jd\n"), + (ctl->no_link ? _("Would link") : _("Linked")), + n1, n2, + (ctl->no_link ? _("would save") : _("saved")), + (intmax_t)st.st_size); + } + close(fd); + return; + } + } + fp2 = xmalloc(add3(sizeof(*fp2), namelen, 1)); + close(fd); + fp2->ino = st.st_ino; + fp2->dev = st.st_dev; + fp2->cksum = cksum; + memcpy(fp2->name, name, namelen + 1); + + if (fp) { + fp2->next = fp->next; + fp->next = fp2; + } else { + fp2->next = hp->chain; + hp->chain = fp2; + } + return; + } +} + +int main(int argc, char **argv) +{ + int ch; + int i; +#ifdef HAVE_PCRE + int errornumber; + PCRE2_SIZE erroroffset; + pcre2_code *re = NULL; + PCRE2_SPTR exclude_pattern = NULL; + pcre2_match_data *match_data = NULL; +#endif + struct hardlink_dynstr nam1 = { NULL, 0 }; + struct hardlink_ctl *ctl = &global_ctl; + + static const struct option longopts[] = { + { "content", no_argument, NULL, 'c' }, + { "dry-run", no_argument, NULL, 'n' }, + { "exclude", required_argument, NULL, 'x' }, + { "force", no_argument, NULL, 'f' }, + { "help", no_argument, NULL, 'h' }, + { "verbose", no_argument, NULL, 'v' }, + { "version", no_argument, NULL, 'V' }, + { NULL, 0, NULL, 0 }, + }; + + setlocale(LC_ALL, ""); + bindtextdomain(PACKAGE, LOCALEDIR); + textdomain(PACKAGE); + close_stdout_atexit(); + + while ((ch = getopt_long(argc, argv, "cnvfx:Vh", longopts, NULL)) != -1) { + switch (ch) { + case 'n': + ctl->no_link = 1; + break; + case 'v': + ctl->verbose++; + break; + case 'c': + ctl->content_only = 1; + break; + case 'f': + ctl->force = 1; + break; + case 'x': +#ifdef HAVE_PCRE + exclude_pattern = (PCRE2_SPTR) optarg; +#else + errx(EXIT_FAILURE, + _("option --exclude not supported (built without pcre2)")); +#endif + break; + case 'V': + print_version(EXIT_SUCCESS); + case 'h': + usage(); + default: + errtryhelp(EXIT_FAILURE); + } + } + + if (optind == argc) { + warnx(_("no directory specified")); + errtryhelp(EXIT_FAILURE); + } + +#ifdef HAVE_PCRE + if (exclude_pattern) { + re = pcre2_compile(exclude_pattern, /* the pattern */ + PCRE2_ZERO_TERMINATED, /* indicates pattern is zero-terminate */ + 0, /* default options */ + &errornumber, &erroroffset, NULL); /* use default compile context */ + if (!re) { + PCRE2_UCHAR buffer[256]; + pcre2_get_error_message(errornumber, buffer, + sizeof(buffer)); + errx(EXIT_FAILURE, _("pattern error at offset %d: %s"), + (int)erroroffset, buffer); + } + match_data = pcre2_match_data_create_from_pattern(re, NULL); + } +#endif + atexit(print_summary); + + for (i = optind; i < argc; i++) + process_path(ctl, argv[i]); + + while (ctl->dirs) { + DIR *dh; + struct dirent *di; + struct hardlink_dir *dp = ctl->dirs; + size_t nam1baselen = strlen(dp->name); + + ctl->dirs = dp->next; + growstr(&nam1, add2(nam1baselen, 1)); + memcpy(nam1.buf, dp->name, nam1baselen); + free(dp); + nam1.buf[nam1baselen++] = '/'; + nam1.buf[nam1baselen] = 0; + dh = opendir(nam1.buf); + + if (dh == NULL) + continue; + ctl->ndirs++; + + while ((di = readdir(dh)) != NULL) { + if (!di->d_name[0]) + continue; + if (di->d_name[0] == '.') { + if (!di->d_name[1] || !strcmp(di->d_name, "..")) + continue; + } +#ifdef HAVE_PCRE + if (re && pcre2_match(re, /* compiled regex */ + (PCRE2_SPTR) di->d_name, strlen(di->d_name), 0, /* start at offset 0 */ + 0, /* default options */ + match_data, /* block for storing the result */ + NULL) /* use default match context */ + >=0) { + if (ctl->verbose) { + nam1.buf[nam1baselen] = 0; + printf(_("Skipping %s%s\n"), nam1.buf, di->d_name); + } + continue; + } +#endif + { + size_t subdirlen; + growstr(&nam1, + add2(nam1baselen, subdirlen = + strlen(di->d_name))); + memcpy(&nam1.buf[nam1baselen], di->d_name, + add2(subdirlen, 1)); + } + process_path(ctl, nam1.buf); + } + closedir(dh); + } + + return 0; +} --- a/localedef/Makefile.in +++ b/localedef/Makefile.in @@ -40,6 +40,8 @@ WARNFLAGS = -Wall -Wno-format FULLCC = $(CC) $(CPPFLAGS) $(CFLAGS) \ $(DEFINES) $(INCLUDES) $(WARNFLAGS) +CROSS_LOCALEDEF_HARDLINK_OBJS = cross-localedef-hardlink.o + LOCALEDEF_OBJS = charmap.o charmap-dir.o ld-address.o ld-collate.o \ ld-ctype.o ld-identification.o ld-measurement.o \ ld-messages.o ld-monetary.o ld-name.o ld-numeric.o \ @@ -54,11 +56,14 @@ LOCALEDEF_OBJS = charmap.o charmap-dir.o asprintf.o getdelim.o localedef_extra.o \ obstack_printf.o vasprintf.o -all: localedef$(EXEEXT) +all: localedef$(EXEEXT) cross-localedef-hardlink$(EXEEXT) localedef$(EXEEXT): $(LOCALEDEF_OBJS) $(CC) -o $@ $(LOCALEDEF_OBJS) $(LIBS) +cross-localedef-hardlink$(EXEEXT): $(CROSS_LOCALEDEF_HARDLINK_OBJS) + $(CC) -o $@ $(CROSS_LOCALEDEF_HARDLINK_OBJS) $(LIBS) + clean: rm -f locale$(EXEEXT) $(LOCALEDEF_OBJS) @@ -77,6 +82,7 @@ clean: %.o: $(srcdir)/%.c $(FULLCC) -c -o $@ $< +cross-localedef-hardlink.o: glibc/locale/programs/cross-localedef-hardlink.c charmap.o: glibc/locale/programs/charmap.c charmap-dir.o: glibc/locale/programs/charmap-dir.c ld-address.o: glibc/locale/programs/ld-address.c --- /dev/null +++ b/locale/programs/c.h @@ -0,0 +1,407 @@ +/* + * Fundamental C definitions. + */ + +#ifndef UTIL_LINUX_C_H +#define UTIL_LINUX_C_H + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include + +#ifdef HAVE_ERR_H +# include +#endif + +#ifdef HAVE_SYS_SYSMACROS_H +# include /* for major, minor */ +#endif + +#ifndef LOGIN_NAME_MAX +# define LOGIN_NAME_MAX 256 +#endif + +#ifndef NAME_MAX +# define NAME_MAX PATH_MAX +#endif + +/* + * __GNUC_PREREQ is deprecated in favour of __has_attribute() and + * __has_feature(). The __has macros are supported by clang and gcc>=5. + */ +#ifndef __GNUC_PREREQ +# if defined __GNUC__ && defined __GNUC_MINOR__ +# define __GNUC_PREREQ(maj, min) \ + ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min)) +# else +# define __GNUC_PREREQ(maj, min) 0 +# endif +#endif + +#ifdef __GNUC__ + +/* &a[0] degrades to a pointer: a different type from an array */ +# define __must_be_array(a) \ + UL_BUILD_BUG_ON_ZERO(__builtin_types_compatible_p(__typeof__(a), __typeof__(&a[0]))) + +# define ignore_result(x) __extension__ ({ \ + __typeof__(x) __dummy __attribute__((__unused__)) = (x); (void) __dummy; \ +}) + +#else /* !__GNUC__ */ +# define __must_be_array(a) 0 +# define __attribute__(_arg_) +# define ignore_result(x) ((void) (x)) +#endif /* !__GNUC__ */ + +/* + * It evaluates to 1 if the attribute/feature is supported by the current + * compilation targed. Fallback for old compilers. + */ +#ifndef __has_attribute + #define __has_attribute(x) 0 +#endif + +#ifndef __has_feature + #define __has_feature(x) 0 +#endif + +/* + * Function attributes + */ +#ifndef __ul_alloc_size +# if (__has_attribute(alloc_size) && __has_attribute(warn_unused_result)) || __GNUC_PREREQ (4, 3) +# define __ul_alloc_size(s) __attribute__((alloc_size(s), warn_unused_result)) +# else +# define __ul_alloc_size(s) +# endif +#endif + +#ifndef __ul_calloc_size +# if (__has_attribute(alloc_size) && __has_attribute(warn_unused_result)) || __GNUC_PREREQ (4, 3) +# define __ul_calloc_size(n, s) __attribute__((alloc_size(n, s), warn_unused_result)) +# else +# define __ul_calloc_size(n, s) +# endif +#endif + +#if __has_attribute(returns_nonnull) || __GNUC_PREREQ (4, 9) +# define __ul_returns_nonnull __attribute__((returns_nonnull)) +#else +# define __ul_returns_nonnull +#endif + +/* + * Force a compilation error if condition is true, but also produce a + * result (of value 0 and type size_t), so the expression can be used + * e.g. in a structure initializer (or wherever else comma expressions + * aren't permitted). + */ +#define UL_BUILD_BUG_ON_ZERO(e) __extension__ (sizeof(struct { int:-!!(e); })) +#define BUILD_BUG_ON_NULL(e) ((void *)sizeof(struct { int:-!!(e); })) + +#ifndef ARRAY_SIZE +# define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]) + __must_be_array(arr)) +#endif + +#ifndef PATH_MAX +# define PATH_MAX 4096 +#endif + +#ifndef TRUE +# define TRUE 1 +#endif + +#ifndef FALSE +# define FALSE 0 +#endif + +#ifndef min +# define min(x, y) __extension__ ({ \ + __typeof__(x) _min1 = (x); \ + __typeof__(y) _min2 = (y); \ + (void) (&_min1 == &_min2); \ + _min1 < _min2 ? _min1 : _min2; }) +#endif + +#ifndef max +# define max(x, y) __extension__ ({ \ + __typeof__(x) _max1 = (x); \ + __typeof__(y) _max2 = (y); \ + (void) (&_max1 == &_max2); \ + _max1 > _max2 ? _max1 : _max2; }) +#endif + +#ifndef cmp_numbers +# define cmp_numbers(x, y) __extension__ ({ \ + __typeof__(x) _a = (x); \ + __typeof__(y) _b = (y); \ + (void) (&_a == &_b); \ + _a == _b ? 0 : _a > _b ? 1 : -1; }) +#endif + +#ifndef offsetof +#define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER) +#endif + +/* + * container_of - cast a member of a structure out to the containing structure + * @ptr: the pointer to the member. + * @type: the type of the container struct this is embedded in. + * @member: the name of the member within the struct. + */ +#ifndef container_of +#define container_of(ptr, type, member) __extension__ ({ \ + const __typeof__( ((type *)0)->member ) *__mptr = (ptr); \ + (type *)( (char *)__mptr - offsetof(type,member) );}) +#endif + +#ifndef HAVE_PROGRAM_INVOCATION_SHORT_NAME +# ifdef HAVE___PROGNAME +extern char *__progname; +# define program_invocation_short_name __progname +# else +# ifdef HAVE_GETEXECNAME +# define program_invocation_short_name \ + prog_inv_sh_nm_from_file(getexecname(), 0) +# else +# define program_invocation_short_name \ + prog_inv_sh_nm_from_file(__FILE__, 1) +# endif +static char prog_inv_sh_nm_buf[256]; +static inline char * +prog_inv_sh_nm_from_file(char *f, char stripext) +{ + char *t; + + if ((t = strrchr(f, '/')) != NULL) + t++; + else + t = f; + + strncpy(prog_inv_sh_nm_buf, t, sizeof(prog_inv_sh_nm_buf) - 1); + prog_inv_sh_nm_buf[sizeof(prog_inv_sh_nm_buf) - 1] = '\0'; + + if (stripext && (t = strrchr(prog_inv_sh_nm_buf, '.')) != NULL) + *t = '\0'; + + return prog_inv_sh_nm_buf; +} +# endif +#endif + + +#ifndef HAVE_ERR_H +static inline void +errmsg(char doexit, int excode, char adderr, const char *fmt, ...) +{ + fprintf(stderr, "%s: ", program_invocation_short_name); + if (fmt != NULL) { + va_list argp; + va_start(argp, fmt); + vfprintf(stderr, fmt, argp); + va_end(argp); + if (adderr) + fprintf(stderr, ": "); + } + if (adderr) + fprintf(stderr, "%m"); + fprintf(stderr, "\n"); + if (doexit) + exit(excode); +} + +#ifndef HAVE_ERR +# define err(E, FMT...) errmsg(1, E, 1, FMT) +#endif + +#ifndef HAVE_ERRX +# define errx(E, FMT...) errmsg(1, E, 0, FMT) +#endif + +#ifndef HAVE_WARN +# define warn(FMT...) errmsg(0, 0, 1, FMT) +#endif + +#ifndef HAVE_WARNX +# define warnx(FMT...) errmsg(0, 0, 0, FMT) +#endif +#endif /* !HAVE_ERR_H */ + + +/* Don't use inline function to avoid '#include "nls.h"' in c.h + */ +#define errtryhelp(eval) __extension__ ({ \ + fprintf(stderr, _("Try '%s --help' for more information.\n"), \ + program_invocation_short_name); \ + exit(eval); \ +}) + +/* After failed execvp() */ +#define EX_EXEC_FAILED 126 /* Program located, but not usable. */ +#define EX_EXEC_ENOENT 127 /* Could not find program to exec. */ +#define errexec(name) err(errno == ENOENT ? EX_EXEC_ENOENT : EX_EXEC_FAILED, \ + _("failed to execute %s"), name) + + +static inline __attribute__((const)) int is_power_of_2(unsigned long num) +{ + return (num != 0 && ((num & (num - 1)) == 0)); +} + +#ifndef HAVE_LOFF_T +typedef int64_t loff_t; +#endif + +#if !defined(HAVE_DIRFD) && (!defined(HAVE_DECL_DIRFD) || HAVE_DECL_DIRFD == 0) && defined(HAVE_DIR_DD_FD) +#include +#include +static inline int dirfd(DIR *d) +{ + return d->dd_fd; +} +#endif + +/* + * Fallback defines for old versions of glibc + */ +#include + +#ifdef O_CLOEXEC +#define UL_CLOEXECSTR "e" +#else +#define UL_CLOEXECSTR "" +#endif + +#ifndef O_CLOEXEC +#define O_CLOEXEC 0 +#endif + +#ifdef __FreeBSD_kernel__ +#ifndef F_DUPFD_CLOEXEC +#define F_DUPFD_CLOEXEC 17 /* Like F_DUPFD, but FD_CLOEXEC is set */ +#endif +#endif + + +#ifndef AI_ADDRCONFIG +#define AI_ADDRCONFIG 0x0020 +#endif + +#ifndef IUTF8 +#define IUTF8 0040000 +#endif + +/* + * MAXHOSTNAMELEN replacement + */ +static inline size_t get_hostname_max(void) +{ + long len = sysconf(_SC_HOST_NAME_MAX); + + if (0 < len) + return len; + +#ifdef MAXHOSTNAMELEN + return MAXHOSTNAMELEN; +#elif HOST_NAME_MAX + return HOST_NAME_MAX; +#endif + return 64; +} + + +/* + * Constant strings for usage() functions. For more info see + * Documentation/{howto-usage-function.txt,boilerplate.c} + */ +#define USAGE_HEADER ("\nUsage:\n") +#define USAGE_OPTIONS ("\nOptions:\n") +#define USAGE_FUNCTIONS ("\nFunctions:\n") +#define USAGE_COMMANDS ("\nCommands:\n") +#define USAGE_COLUMNS ("\nAvailable output columns:\n") +#define USAGE_SEPARATOR "\n" + +#define USAGE_OPTSTR_HELP ("display this help") +#define USAGE_OPTSTR_VERSION ("display version") + +#define USAGE_HELP_OPTIONS(marg_dsc) \ + "%-" #marg_dsc "s%s\n" \ + "%-" #marg_dsc "s%s\n" \ + , " -h, --help", USAGE_OPTSTR_HELP \ + , " -V, --version", USAGE_OPTSTR_VERSION + +#define USAGE_MAN_TAIL(_man) ("\nFor more details see %s.\n"), _man + +#define UTIL_LINUX_VERSION ("%s from %s\n"), program_invocation_short_name, PACKAGE_STRING + +#define print_version(eval) __extension__ ({ \ + printf(UTIL_LINUX_VERSION); \ + exit(eval); \ +}) + +/* + * scanf modifiers for "strings allocation" + */ +#ifdef HAVE_SCANF_MS_MODIFIER +#define UL_SCNsA "%ms" +#elif defined(HAVE_SCANF_AS_MODIFIER) +#define UL_SCNsA "%as" +#endif + +/* + * seek stuff + */ +#ifndef SEEK_DATA +# define SEEK_DATA 3 +#endif +#ifndef SEEK_HOLE +# define SEEK_HOLE 4 +#endif + + +/* + * Macros to convert #define'itions to strings, for example + * #define XYXXY 42 + * printf ("%s=%s\n", stringify(XYXXY), stringify_value(XYXXY)); + */ +#define stringify_value(s) stringify(s) +#define stringify(s) #s + +/* + * UL_ASAN_BLACKLIST is a macro to tell AddressSanitizer (a compile-time + * instrumentation shipped with Clang and GCC) to not instrument the + * annotated function. Furthermore, it will prevent the compiler from + * inlining the function because inlining currently breaks the blacklisting + * mechanism of AddressSanitizer. + */ +#if __has_feature(address_sanitizer) && __has_attribute(no_sanitize_memory) && __has_attribute(no_sanitize_address) +# define UL_ASAN_BLACKLIST __attribute__((noinline)) __attribute__((no_sanitize_memory)) __attribute__((no_sanitize_address)) +#else +# define UL_ASAN_BLACKLIST /* nothing */ +#endif + +/* + * Note that sysconf(_SC_GETPW_R_SIZE_MAX) returns *initial* suggested size for + * pwd buffer and in some cases it is not large enough. See POSIX and + * getpwnam_r man page for more details. + */ +#define UL_GETPW_BUFSIZ (16 * 1024) + +/* + * Darwin or other BSDs may only have MAP_ANON. To get it on Darwin we must + * define _DARWIN_C_SOURCE before including sys/mman.h. We do this in config.h. + */ +#if !defined MAP_ANONYMOUS && defined MAP_ANON +# define MAP_ANONYMOUS (MAP_ANON) +#endif + +#endif /* UTIL_LINUX_C_H */ --- /dev/null +++ b/locale/programs/xalloc.h @@ -0,0 +1,129 @@ +/* + * Copyright (C) 2010 Davidlohr Bueso + * + * This file may be redistributed under the terms of the + * GNU Lesser General Public License. + * + * General memory allocation wrappers for malloc, realloc, calloc and strdup + */ + +#ifndef UTIL_LINUX_XALLOC_H +#define UTIL_LINUX_XALLOC_H + +#include +#include + +#include "c.h" + +#ifndef XALLOC_EXIT_CODE +# define XALLOC_EXIT_CODE EXIT_FAILURE +#endif + +static inline void __attribute__((__noreturn__)) +__err_oom(const char *file, unsigned int line) +{ + err(XALLOC_EXIT_CODE, "%s: %u: cannot allocate memory", file, line); +} + +#define err_oom() __err_oom(__FILE__, __LINE__) + +static inline __ul_alloc_size(1) __ul_returns_nonnull +void *xmalloc(const size_t size) +{ + void *ret = malloc(size); + + if (!ret && size) + err(XALLOC_EXIT_CODE, "cannot allocate %zu bytes", size); + return ret; +} + +static inline __ul_alloc_size(2) __ul_returns_nonnull +void *xrealloc(void *ptr, const size_t size) +{ + void *ret = realloc(ptr, size); + + if (!ret && size) + err(XALLOC_EXIT_CODE, "cannot allocate %zu bytes", size); + return ret; +} + +static inline __ul_calloc_size(1, 2) __ul_returns_nonnull +void *xcalloc(const size_t nelems, const size_t size) +{ + void *ret = calloc(nelems, size); + + if (!ret && size && nelems) + err(XALLOC_EXIT_CODE, "cannot allocate %zu bytes", size); + return ret; +} + +static inline char __attribute__((warn_unused_result)) __ul_returns_nonnull +*xstrdup(const char *str) +{ + char *ret; + + if (!str) + return NULL; + + ret = strdup(str); + + if (!ret) + err(XALLOC_EXIT_CODE, "cannot duplicate string"); + return ret; +} + +static inline char * __attribute__((warn_unused_result)) __ul_returns_nonnull +xstrndup(const char *str, size_t size) +{ + char *ret; + + if (!str) + return NULL; + + ret = strndup(str, size); + + if (!ret) + err(XALLOC_EXIT_CODE, "cannot duplicate string"); + return ret; +} + + +static inline int __attribute__ ((__format__(printf, 2, 3))) + xasprintf(char **strp, const char *fmt, ...) +{ + int ret; + va_list args; + va_start(args, fmt); + ret = vasprintf(&(*strp), fmt, args); + va_end(args); + if (ret < 0) + err(XALLOC_EXIT_CODE, "cannot allocate string"); + return ret; +} + +static inline int __attribute__ ((__format__(printf, 2, 0))) +xvasprintf(char **strp, const char *fmt, va_list ap) +{ + int ret = vasprintf(&(*strp), fmt, ap); + if (ret < 0) + err(XALLOC_EXIT_CODE, "cannot allocate string"); + return ret; +} + + +static inline char * __attribute__((warn_unused_result)) xgethostname(void) +{ + char *name; + size_t sz = get_hostname_max() + 1; + + name = xmalloc(sizeof(char) * sz); + + if (gethostname(name, sz) != 0) { + free(name); + return NULL; + } + name[sz - 1] = '\0'; + return name; +} + +#endif