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/* SPDX-License-Identifier: ISC */
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include "servicecmd.h"
#include "service.h"
static service_t *try_load(const char *directory, const char *filename)
{
int dirfd, type;
struct stat sb;
service_t *svc;
dirfd = open(directory, O_RDONLY | O_DIRECTORY);
if (dirfd < 0) {
perror(directory);
return NULL;
}
if (fstatat(dirfd, filename, &sb, AT_SYMLINK_NOFOLLOW)) {
fprintf(stderr, "stat %s/%s: %s\n",
directory, filename, strerror(errno));
close(dirfd);
return NULL;
}
type = (sb.st_mode & S_IFMT);
if (type != S_IFREG && type != S_IFLNK)
return NULL;
svc = rdsvc(dirfd, filename, 0);
close(dirfd);
return svc;
}
enum {
NEED_QUOTES = 0x01,
NEED_ESCAPE = 0x02,
};
static int check_str(const char *str)
{
int ret = 0;
while (*str != '\0') {
if (isspace(*str))
ret |= NEED_QUOTES;
if (!isascii(*str) || !isprint(*str))
ret |= NEED_ESCAPE | NEED_QUOTES;
if (*str == '\\' || *str == '"' || *str == '\n')
ret |= NEED_ESCAPE | NEED_QUOTES;
++str;
}
return ret;
}
static void print_str(const char *str)
{
int flags = check_str(str);
if (flags & NEED_QUOTES)
fputc('"', stdout);
if (flags & NEED_ESCAPE) {
while (*str != '\0') {
switch (*str) {
case '\a': fputs("\\a", stdout); break;
case '\b': fputs("\\b", stdout); break;
case '\f': fputs("\\f", stdout); break;
case '\r': fputs("\\r", stdout); break;
case '\t': fputs("\\t", stdout); break;
case '\n': fputs("\\n", stdout); break;
case '\\':
case '"':
fprintf(stdout, "\\%c", *str);
break;
default:
if (!isascii(*str) || !isprint(*str)) {
fprintf(stdout, "\\x%02X", *str);
} else {
fputc(*str, stdout);
}
break;
}
++str;
}
} else {
fputs(str, stdout);
}
if (flags & NEED_QUOTES)
fputc('"', stdout);
}
static int cmd_dumpscript(int argc, char **argv)
{
char *filename, *ptr;
service_t *svc;
size_t len;
exec_t *e;
int i;
if (check_arguments(argv[0], argc, 2, 3))
return EXIT_FAILURE;
for (len = 1, i = 1; i < argc; ++i)
len += strlen(argv[i]) + 1;
filename = alloca(len);
filename[0] = '\0';
for (i = 1; i < argc; ++i) {
if (i > 1)
strcat(filename, "@");
strcat(filename, argv[i]);
}
svc = try_load(SVCDIR, filename);
if (svc == NULL) {
fprintf(stderr, "Could not load service '%s'\n", filename);
return EXIT_FAILURE;
}
fprintf(stdout, "#\n# commands executed for serice '%s'\n#\n",
filename);
for (e = svc->exec; e != NULL; e = e->next) {
ptr = e->args;
for (i = 0; i < e->argc; ++i) {
if (i)
fputc(' ', stdout);
print_str(ptr);
ptr += strlen(ptr) + 1;
}
putchar('\n');
}
delsvc(svc);
return EXIT_SUCCESS;
}
static command_t dumpscript = {
.cmd = "dumpscript",
.usage = "<name> [arguments]",
.s_desc = "print commands executed for a service",
.l_desc = "This parses a service file from " SVCDIR " and "
"produces a pseudo-shell-script containing the "
"exact commands after argument expansion that init "
"runs when starting the service.",
.run_cmd = cmd_dumpscript,
};
REGISTER_COMMAND(dumpscript)
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