From e9a910b33c7837b4b868e3abda18eb4810df7f02 Mon Sep 17 00:00:00 2001 From: Leah Rowe Date: Sat, 4 Oct 2025 09:14:33 +0100 Subject: config/git: import suckless sbase i currently use the output of sha512sum in several places of xbmk, which is a bit unreliable in case output changes. other cases where i use util outputs in variables are probably reliable, because i'm using mostly posix utilities in those. to mitigate this, i now import suckless sbase, which has a reasonable sha512sum implementation. *every* binary it builds is being placed in build.list, because i'll probably start using more of them. for example, i may start modifying the "date" implementation, adding the GNU-specific options that i need as mentioned on init.sh i'm importing it in util/ because the sha512sum util is needed for verifying project sources, so if sbase itself is a "project source", that means we can into a chicken and egg bootstrapping problem. this is sbase at revision: 055cc1ae1b3a13c3d8f25af0a4a3316590efcd48 Signed-off-by: Leah Rowe --- util/sbase/libutil/parseoffset.c | 61 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 61 insertions(+) create mode 100644 util/sbase/libutil/parseoffset.c (limited to 'util/sbase/libutil/parseoffset.c') diff --git a/util/sbase/libutil/parseoffset.c b/util/sbase/libutil/parseoffset.c new file mode 100644 index 00000000..362a7829 --- /dev/null +++ b/util/sbase/libutil/parseoffset.c @@ -0,0 +1,61 @@ +/* See LICENSE file for copyright and license details. */ +#include +#include +#include +#include +#include + +#include "../util.h" + +off_t +parseoffset(const char *str) +{ + off_t res, scale = 1; + char *end; + + /* strictly check what strtol() usually would let pass */ + if (!str || !*str || isspace(*str) || *str == '+' || *str == '-') { + weprintf("parseoffset %s: invalid value\n", str); + return -1; + } + + errno = 0; + res = strtol(str, &end, 0); + if (errno) { + weprintf("parseoffset %s: invalid value\n", str); + return -1; + } + if (res < 0) { + weprintf("parseoffset %s: negative value\n", str); + return -1; + } + + /* suffix */ + if (*end) { + switch (toupper((int)*end)) { + case 'B': + scale = 512L; + break; + case 'K': + scale = 1024L; + break; + case 'M': + scale = 1024L * 1024L; + break; + case 'G': + scale = 1024L * 1024L * 1024L; + break; + default: + weprintf("parseoffset %s: invalid suffix '%s'\n", str, end); + return -1; + } + } + + /* prevent overflow */ + if (res > (SSIZE_MAX / scale)) { + weprintf("parseoffset %s: out of range\n", str); + return -1; + } + + return res * scale; +} -- cgit v1.2.1