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sscanf/strtoul: parse integers robustly

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* builtin-grep.c (strtoul_ui): Move function definition from here, to...
* git-compat-util.h (strtoul_ui): ...here, with an added "base" parameter.
* builtin-grep.c (cmd_grep): Update use of strtoul_ui to include base, "10".
* builtin-update-index.c (read_index_info): Diagnose an invalid mode integer
that is out of range or merely larger than INT_MAX.
(cmd_update_index): Use strtoul_ui, not sscanf.
* convert-objects.c (write_subdirectory): Likewise.

Signed-off-by: Jim Meyering <jim@meyering.net>
Signed-off-by: Junio C Hamano <junkio@cox.net>
This commit is contained in:
Jim Meyering
2007-04-10 01:01:44 +02:00
committed by Junio C Hamano
parent e94b4d2f2a
commit 61d6ed139f
4 changed files with 22 additions and 18 deletions
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10
builtin-update-index.c
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@ -227,6 +227,7 @@ static void read_index_info(int line_termination)
char *path_name;
unsigned char sha1[20];
unsigned int mode;
unsigned long ul;
int stage;
/* This reads lines formatted in one of three formats:
@ -249,9 +250,12 @@ static void read_index_info(int line_termination)
if (buf.eof)
break;
mode = strtoul(buf.buf, &ptr, 8);
if (ptr == buf.buf || *ptr != ' ')
errno = 0;
ul = strtoul(buf.buf, &ptr, 8);
if (ptr == buf.buf || *ptr != ' '
|| errno || (unsigned int) ul != ul)
goto bad_line;
mode = ul;
tab = strchr(ptr, '\t');
if (!tab || tab - ptr < 41)
@ -547,7 +551,7 @@ int cmd_update_index(int argc, const char **argv, const char *prefix)
if (i+3 >= argc)
die("git-update-index: --cacheinfo <mode> <sha1> <path>");
if ((sscanf(argv[i+1], "%o", &mode) != 1) ||
if ((strtoul_ui(argv[i+1], 8, &mode) != 1) ||
get_sha1_hex(argv[i+2], sha1) ||
add_cacheinfo(mode, sha1, argv[i+3], 0))
die("git-update-index: --cacheinfo"