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scrut(1): adds support for pledge(2) and unveil(2)

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Emma Tebibyte 2024-08-10 17:17:42 -06:00
parent 0ddfa6e474
commit 42010596de
Signed by: emma
GPG Key ID: 06FA419A1698C270
1 changed files with 20 additions and 3 deletions
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23
src/scrut.c
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@ -20,8 +20,9 @@
#include <stdio.h> /* fprintf(3), stderr, NULL */
#include <stdlib.h> /* EXIT_FAILURE, EXIT_SUCCESS */
#include <string.h> /* memset(3), strchr(3) */
#include <sysexits.h> /* EX_USAGE */
#include <unistd.h> /* access(3), getopt(3), F_OK, R_OK, W_OK, X_OK */
#include <sysexits.h> /* EX_OSERR, EX_USAGE */
#include <unistd.h> /* access(3), getopt(3), pledge(2), unveil(2), F_OK, R_OK,
* W_OK, X_OK */
#include <sys/stat.h> /* lstat(3), stat struct, S_ISBLK, S_ISCHR, S_ISDIR,
* S_ISFIFO, S_ISGID, S_ISREG, S_ISLNK, S_ISSOCK,
* S_ISUID, S_ISVTX */
@ -40,7 +41,16 @@ usage(char *argv0) {
int main(int argc, char *argv[]) {
char sel[(sizeof opts) / (sizeof *opts)];
if (argc < 2) { return usage(argv[0] == NULL ? program_name : argv[0]); }
program_name = argv[0] == NULL ? program_name : argv[0];
#ifdef __OpenBSD__
if (pledge("rpath stdio unveil", NULL) == -1) {
perror(program_name);
return EX_OSERR;
}
#endif
if (argc < 2) { return usage(program_name); }
{ /* option parsing */
char *p;
@ -66,6 +76,13 @@ int main(int argc, char *argv[]) {
for (argv += optind ; *argv != NULL; ++argv) {
struct stat buf;
#ifdef __OpenBSD__
if (unveil(*argv, "r") == -1) {
perror(program_name);
return EX_OSERR;
}
#endif
if(access(*argv, F_OK) != 0 || lstat(*argv, &buf) == -1) {
return EXIT_FAILURE; /* doesn't exist or isn't stattable */
}