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Avoid APE fork bomb

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This change addresses a $PATH resolution issue where APE depends on
uname and uname is an APE program. So sorry to anyone this impacted
we'll get a release out soon.
This commit is contained in:
Justine Tunney 2023-11-08 11:34:10 -08:00
parent cc3e3de044
commit 5330442d85
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GPG key ID: BE714B4575D6E328
2 changed files with 27 additions and 24 deletions
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27
tool/build/apelink.c
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@ -1944,7 +1944,8 @@ int main(int argc, char *argv[]) {
}
// otherwise this is a fresh install so consider the platform
p = stpcpy(p, "m=$(uname -m)\n");
p = stpcpy(p, "m=\"$(/bin/uname -m >/dev/null)\" || "
"m=\"$(/usr/bin/uname -m)\"\n");
if (support_vector & _HOSTXNU) {
p = stpcpy(p, "if [ ! -d /Applications ]; then\n");
}
@ -2044,7 +2045,7 @@ int main(int argc, char *argv[]) {
p = stpcpy(p, "if [ x\"$1\" = x--assimilate ]; then\n");
}
p = GenerateScriptIfMachine(p, in);
p = stpcpy(p, "dd if=\"$o\" of=\"$o\" bs=1");
p = stpcpy(p, "/bin/dd if=\"$o\" of=\"$o\" bs=1");
p = stpcpy(p, " skip=");
in->ddarg_macho_skip = p;
p = GenerateDecimalOffsetRelocation(p);
@ -2070,8 +2071,8 @@ int main(int argc, char *argv[]) {
if ((loader = GetLoader(in->elf->e_machine, _HOSTXNU))) {
loader->used = true;
p = GenerateScriptIfMachine(p, in); // <if-machine>
p = stpcpy(p, "mkdir -p \"${t%/*}\" ||exit\n"
"dd if=\"$o\"");
p = stpcpy(p, "/bin/mkdir -p \"${t%/*}\" ||exit\n"
"/bin/dd if=\"$o\"");
p = stpcpy(p, " skip=");
loader->ddarg_skip1 = p;
p = GenerateDecimalOffsetRelocation(p);
@ -2080,15 +2081,15 @@ int main(int argc, char *argv[]) {
p = GenerateDecimalOffsetRelocation(p);
p = stpcpy(p, " bs=1 2>/dev/null | gzip -dc >\"$t.$$\" ||exit\n");
if (loader->macho_offset) {
p = stpcpy(p, "dd if=\"$t.$$\" of=\"$t.$$\"");
p = stpcpy(p, "/bin/dd if=\"$t.$$\" of=\"$t.$$\"");
p = stpcpy(p, " skip=");
p = FormatInt32(p, loader->macho_offset / 64);
p = stpcpy(p, " count=");
p = FormatInt32(p, ROUNDUP(loader->macho_length, 64) / 64);
p = stpcpy(p, " bs=64 conv=notrunc 2>/dev/null ||exit\n");
}
p = stpcpy(p, "chmod 755 \"$t.$$\" ||exit\n"
"mv -f \"$t.$$\" \"$t\" ||exit\n");
p = stpcpy(p, "/bin/chmod 755 \"$t.$$\" ||exit\n"
"/bin/mv -f \"$t.$$\" \"$t\" ||exit\n");
p = stpcpy(p, "exec \"$t\" \"$o\" \"$@\"\n"
"fi\n"); // </if-machine>
gotsome = true;
@ -2107,8 +2108,8 @@ int main(int argc, char *argv[]) {
"echo \"$0: please run: xcode-select --install\" >&2\n"
"exit 1\n"
"fi\n"
"mkdir -p \"${t%/*}\" ||exit\n"
"dd if=\"$o\"");
"/bin/mkdir -p \"${t%/*}\" ||exit\n"
"/bin/dd if=\"$o\"");
p = stpcpy(p, " skip=");
macos_silicon_loader_source_ddarg_skip = p;
p = GenerateDecimalOffsetRelocation(p);
@ -2142,8 +2143,8 @@ int main(int argc, char *argv[]) {
if ((loader = GetLoader(in->elf->e_machine, ~_HOSTXNU))) {
loader->used = true;
p = GenerateScriptIfMachine(p, in);
p = stpcpy(p, "mkdir -p \"${t%/*}\" ||exit\n"
"dd if=\"$o\"");
p = stpcpy(p, "/bin/mkdir -p \"${t%/*}\" ||exit\n"
"/bin/dd if=\"$o\"");
p = stpcpy(p, " skip=");
loader->ddarg_skip2 = p;
p = GenerateDecimalOffsetRelocation(p);
@ -2151,8 +2152,8 @@ int main(int argc, char *argv[]) {
loader->ddarg_size2 = p;
p = GenerateDecimalOffsetRelocation(p);
p = stpcpy(p, " bs=1 2>/dev/null | gzip -dc >\"$t.$$\" ||exit\n"
"chmod 755 \"$t.$$\" ||exit\n"
"mv -f \"$t.$$\" \"$t\" ||exit\n");
"/bin/chmod 755 \"$t.$$\" ||exit\n"
"/bin/mv -f \"$t.$$\" \"$t\" ||exit\n");
p = stpcpy(p, "exec \"$t\" \"$o\" \"$@\"\n"
"fi\n");
}