X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=lib%2Freadline%2Fhistfile.c;h=60a91251b7aec1a754ce02ca0623e7bde4c6b8fb;hb=7117c2d221b2aed4ede8600f6a36b7c1454b4f55;hp=ab3c6c1dc79e4ec02d7afd0b51c0dc3c0ba57b43;hpb=f73dda092b33638d2d5e9c35375f687a607b5403;p=platform%2Fupstream%2Fbash.git diff --git a/lib/readline/histfile.c b/lib/readline/histfile.c index ab3c6c1..60a9125 100644 --- a/lib/readline/histfile.c +++ b/lib/readline/histfile.c @@ -48,12 +48,26 @@ # include #endif -#if defined (HAVE_STRING_H) -# include -#else -# include -#endif /* !HAVE_STRING_H */ +#if defined (__EMX__) || defined (__CYGWIN__) +# undef HAVE_MMAP +#endif +#ifdef HAVE_MMAP +# include + +# ifdef MAP_FILE +# define MAP_RFLAGS (MAP_FILE|MAP_PRIVATE) +# define MAP_WFLAGS (MAP_FILE|MAP_SHARED) +# else +# define MAP_RFLAGS MAP_PRIVATE +# define MAP_WFLAGS MAP_SHARED +# endif + +# ifndef MAP_FAILED +# define MAP_FAILED ((void *)-1) +# endif + +#endif /* HAVE_MMAP */ /* If we're compiling for __EMX__ (OS/2) or __CYGWIN__ (cygwin32 environment on win 95/98/nt), we want to open files with O_BINARY mode so that there @@ -137,8 +151,8 @@ read_history_range (filename, from, to) const char *filename; int from, to; { - register int line_start, line_end; - char *input, *buffer; + register char *line_start, *line_end; + char *input, *buffer, *bufend; int file, current_line, chars_read; struct stat finfo; size_t file_size; @@ -157,23 +171,39 @@ read_history_range (filename, from, to) { #if defined (EFBIG) errno = EFBIG; +#elif defined (EOVERFLOW) + errno = EOVERFLOW; #endif goto error_and_exit; } - buffer = (char *)xmalloc (file_size + 1); +#ifdef HAVE_MMAP + /* We map read/write and private so we can change newlines to NULs without + affecting the underlying object. */ + buffer = (char *)mmap (0, file_size, PROT_READ|PROT_WRITE, MAP_RFLAGS, file, 0); + if ((void *)buffer == MAP_FAILED) + goto error_and_exit; + chars_read = file_size; +#else + buffer = (char *)malloc (file_size + 1); + if (buffer == 0) + goto error_and_exit; chars_read = read (file, buffer, file_size); +#endif if (chars_read < 0) { error_and_exit: + chars_read = errno; if (file >= 0) close (file); FREE (input); +#ifndef HAVE_MMAP FREE (buffer); +#endif - return (errno); + return (chars_read); } close (file); @@ -183,29 +213,25 @@ read_history_range (filename, from, to) to = chars_read; /* Start at beginning of file, work to end. */ - line_start = line_end = current_line = 0; + bufend = buffer + chars_read; + current_line = 0; /* Skip lines until we are at FROM. */ - while (line_start < chars_read && current_line < from) - { - for (line_end = line_start; line_end < chars_read; line_end++) - if (buffer[line_end] == '\n') - { - current_line++; - line_start = line_end + 1; - if (current_line == from) - break; - } - } + for (line_start = line_end = buffer; line_end < bufend && current_line < from; line_end++) + if (*line_end == '\n') + { + current_line++; + line_start = line_end + 1; + } /* If there are lines left to gobble, then gobble them now. */ - for (line_end = line_start; line_end < chars_read; line_end++) - if (buffer[line_end] == '\n') + for (line_end = line_start; line_end < bufend; line_end++) + if (*line_end == '\n') { - buffer[line_end] = '\0'; + *line_end = '\0'; - if (buffer[line_start]) - add_history (buffer + line_start); + if (*line_start) + add_history (line_start); current_line++; @@ -216,7 +242,11 @@ read_history_range (filename, from, to) } FREE (input); +#ifndef HAVE_MMAP FREE (buffer); +#else + munmap (buffer, file_size); +#endif return (0); } @@ -229,9 +259,8 @@ history_truncate_file (fname, lines) const char *fname; int lines; { - register int i; + char *buffer, *filename, *bp; int file, chars_read, rv; - char *buffer, *filename; struct stat finfo; size_t file_size; @@ -276,7 +305,13 @@ history_truncate_file (fname, lines) goto truncate_exit; } - buffer = (char *)xmalloc (file_size + 1); + buffer = (char *)malloc (file_size + 1); + if (buffer == 0) + { + close (file); + goto truncate_exit; + } + chars_read = read (file, buffer, file_size); close (file); @@ -288,9 +323,9 @@ history_truncate_file (fname, lines) /* Count backwards from the end of buffer until we have passed LINES lines. */ - for (i = chars_read - 1; lines && i; i--) + for (bp = buffer + chars_read - 1; lines && bp > buffer; bp--) { - if (buffer[i] == '\n') + if (*bp == '\n') lines--; } @@ -299,22 +334,22 @@ history_truncate_file (fname, lines) anything. It's the first line if we don't find a newline between the current value of i and 0. Otherwise, write from the start of this line until the end of the buffer. */ - for ( ; i; i--) - if (buffer[i] == '\n') + for ( ; bp > buffer; bp--) + if (*bp == '\n') { - i++; + bp++; break; } /* Write only if there are more lines in the file than we want to truncate to. */ - if (i && ((file = open (filename, O_WRONLY|O_TRUNC|O_BINARY, 0600)) != -1)) + if (bp > buffer && ((file = open (filename, O_WRONLY|O_TRUNC|O_BINARY, 0600)) != -1)) { - write (file, buffer + i, chars_read - i); + write (file, bp, chars_read - (bp - buffer)); #if defined (__BEOS__) /* BeOS ignores O_TRUNC. */ - ftruncate (file, chars_read - i); + ftruncate (file, chars_read - (bp - buffer)); #endif close (file); @@ -339,8 +374,13 @@ history_do_write (filename, nelements, overwrite) register int i; char *output; int file, mode, rv; + size_t cursize; +#ifdef HAVE_MMAP + mode = overwrite ? O_RDWR|O_CREAT|O_TRUNC|O_BINARY : O_RDWR|O_APPEND|O_BINARY; +#else mode = overwrite ? O_WRONLY|O_CREAT|O_TRUNC|O_BINARY : O_WRONLY|O_APPEND|O_BINARY; +#endif output = history_filename (filename); rv = 0; @@ -350,6 +390,10 @@ history_do_write (filename, nelements, overwrite) return (errno); } +#ifdef HAVE_MMAP + cursize = overwrite ? 0 : lseek (file, 0, SEEK_END); +#endif + if (nelements > history_length) nelements = history_length; @@ -367,7 +411,28 @@ history_do_write (filename, nelements, overwrite) buffer_size += 1 + strlen (the_history[i]->line); /* Allocate the buffer, and fill it. */ - buffer = (char *)xmalloc (buffer_size); +#ifdef HAVE_MMAP + if (ftruncate (file, buffer_size+cursize) == -1) + goto mmap_error; + buffer = (char *)mmap (0, buffer_size, PROT_READ|PROT_WRITE, MAP_WFLAGS, file, cursize); + if ((void *)buffer == MAP_FAILED) + { +mmap_error: + rv = errno; + FREE (output); + close (file); + return rv; + } +#else + buffer = (char *)malloc (buffer_size); + if (buffer == 0) + { + rv = errno; + FREE (output); + close (file); + return rv; + } +#endif for (j = 0, i = history_length - nelements; i < history_length; i++) { @@ -376,9 +441,14 @@ history_do_write (filename, nelements, overwrite) buffer[j++] = '\n'; } +#ifdef HAVE_MMAP + if (msync (buffer, buffer_size, 0) != 0 || munmap (buffer, buffer_size) != 0) + rv = errno; +#else if (write (file, buffer, buffer_size) < 0) rv = errno; free (buffer); +#endif } close (file);