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Mint APE Loader v1.5

Browse source 
This change ports APE Loader to Linux AARCH64, so that Raspberry Pi
users can run programs like redbean, without the executable needing
to modify itself. Progress has also slipped into this change on the
issue of making progress better conforming to user expectations and
industry standards regarding which symbols we're allowed to declare
This commit is contained in:
Justine Tunney 2023-07-26 13:54:49 -07:00
parent 6843150e0c
commit 7e0a09feec
No known key found for this signature in database
GPG key ID: BE714B4575D6E328
510 changed files with 1783 additions and 1483 deletions
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69
libc/runtime/cocmd.c
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@ -137,7 +137,7 @@ static void UnsetEnv(char **p, const char *k) {
}
static void Append(int c) {
_npassert(q + 1 < argbuf + sizeof(argbuf));
npassert(q + 1 < argbuf + sizeof(argbuf));
*q++ = c;
}
@ -234,6 +234,54 @@ static int Echo(void) {
return 0;
}
static int Cat(void) {
int i, fd;
ssize_t rc;
char buf[512];
if (n < 2) {
for (;;) {
rc = read(0, buf, sizeof(buf));
if (rc == -1) {
perror("read");
return 1;
}
if (!rc) break;
rc = write(1, buf, rc);
if (rc == -1) {
perror("write");
return 1;
}
}
} else {
for (i = 1; i < n; ++i) {
if ((fd = open(args[i], O_RDONLY)) == -1) {
perror(args[i]);
return 1;
}
for (;;) {
rc = read(fd, buf, sizeof(buf));
if (rc == -1) {
perror(args[i]);
close(fd);
return 1;
}
if (!rc) break;
rc = write(1, buf, rc);
if (rc == -1) {
perror("write");
close(fd);
return 1;
}
}
if (close(fd)) {
perror(args[i]);
return 1;
}
}
}
return 0;
}
static int Read(void) {
unsigned char c;
int i, j, rc = 1;
@ -522,6 +570,7 @@ static int TryBuiltin(void) {
if (!strcmp(args[0], "cd")) return Cd();
if (!strcmp(args[0], "rm")) return Rm();
if (!strcmp(args[0], "[")) return Test();
if (!strcmp(args[0], "cat")) return Cat();
if (!strcmp(args[0], "env")) return Env();
if (!strcmp(args[0], "exec")) return Exec();
if (!strcmp(args[0], "wait")) return Wait();
@ -562,14 +611,14 @@ static void Pipe(void) {
_Exit(127);
}
if (!pid) {
_unassert(dup2(pfds[1], 1) == 1);
unassert(dup2(pfds[1], 1) == 1);
// we can't rely on cloexec because builtins
if (pfds[0] != 1) _unassert(!close(pfds[0]));
if (pfds[1] != 1) _unassert(!close(pfds[1]));
if (pfds[0] != 1) unassert(!close(pfds[0]));
if (pfds[1] != 1) unassert(!close(pfds[1]));
_Exit(ShellExec());
}
_unassert(!dup2(pfds[0], 0));
if (pfds[1]) _unassert(!close(pfds[1]));
unassert(!dup2(pfds[0], 0));
if (pfds[1]) unassert(!close(pfds[1]));
n = 0;
}
@ -619,7 +668,7 @@ static const char *GetVar(const char *key) {
} else if (key[0] == '?' && !key[1]) {
return IntToStr(exitstatus);
} else if (!strcmp(key, "PWD")) {
_npassert(getcwd(vbuf, sizeof(vbuf)));
npassert(getcwd(vbuf, sizeof(vbuf)));
return vbuf;
} else if (!strcmp(key, "UID")) {
FormatInt32(vbuf, getuid());
@ -644,14 +693,14 @@ static bool CopyVar(void) {
size_t j;
const char *s;
if (IsVarName(*p)) {
_npassert(vari + 1 < sizeof(var));
npassert(vari + 1 < sizeof(var));
var[vari++] = *p;
var[vari] = 0;
return false;
}
if ((s = GetVar(var))) {
if ((j = strlen(s))) {
_npassert(q + j < argbuf + sizeof(argbuf));
npassert(q + j < argbuf + sizeof(argbuf));
q = mempcpy(q, s, j);
}
}
@ -855,7 +904,7 @@ int _cocmd(int argc, char **argv, char **envp) {
int envi = 0;
if (envp) {
for (; envp[envi]; ++envi) {
_npassert(envi + 1 < ARRAYLEN(envs));
npassert(envi + 1 < ARRAYLEN(envs));
envs[envi] = envp[envi];
}
}