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Add execve / fexecve support to ZIpOS (#727)

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Gavin Hayes 2023-02-24 14:48:24 -05:00 • committed by GitHub
parent 0312898979
commit 5923d483a4
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GPG key ID: 4AEE18F83AFDEB23
5 changed files with 143 additions and 22 deletions
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28
libc/calls/execve.c
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@ -32,6 +32,7 @@
#include "libc/log/libfatal.internal.h"
#include "libc/sysv/consts/o.h"
#include "libc/sysv/errfuns.h"
#include "libc/zipos/zipos.internal.h"
/**
* Replaces current process with program.
@ -51,6 +52,7 @@
* @vforksafe
*/
int execve(const char *prog, char *const argv[], char *const envp[]) {
struct ZiposUri uri;
int rc;
size_t i;
if (!prog || !argv || !envp ||
@ -61,16 +63,26 @@ int execve(const char *prog, char *const argv[], char *const envp[]) {
} else {
STRACE("execve(%#s, %s, %s) → ...", prog, DescribeStringList(argv),
DescribeStringList(envp));
if (!IsWindows()) {
rc = 0;
if (IsLinux() && __execpromises && _weaken(sys_pledge_linux)) {
rc = _weaken(sys_pledge_linux)(__execpromises, __pledge_mode);
}
if (!rc) {
rc = 0;
if (IsLinux() && __execpromises && _weaken(sys_pledge_linux)) {
rc = _weaken(sys_pledge_linux)(__execpromises, __pledge_mode);
}
if (!rc) {
if (_weaken(__zipos_parseuri) &&
(_weaken(__zipos_parseuri)(prog, &uri) != -1)) {
rc = _weaken(__zipos_open)(&uri, O_RDONLY | O_CLOEXEC, 0);
if (rc != -1) {
const int zipFD = rc;
strace_enabled(-1);
rc = fexecve(zipFD, argv, envp);
close(zipFD);
strace_enabled(+1);
}
} else if (!IsWindows()) {
rc = sys_execve(prog, argv, envp);
} else {
rc = sys_execve_nt(prog, argv, envp);
}
} else {
rc = sys_execve_nt(prog, argv, envp);
}
}
STRACE("execve(%#s) failed %d% m", prog, rc);