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libcsupport: Avoid TOCTOU and format errors

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This commit is contained in:
Sebastian Huber
2014-11-14 11:30:50 +01:00
parent 80055514bb
commit 6935428a29
7 changed files with 200 additions and 20 deletions
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42
cpukit/libcsupport/src/pwdgrp.c
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@@ -39,40 +39,42 @@
static pthread_once_t pwdgrp_once = PTHREAD_ONCE_INIT;
static void init_file(const char *name, const char *content)
{
FILE *fp = fopen(name, "wx");
if (fp != NULL) {
fputs(content, fp);
fclose(fp);
}
}
/**
* Initialize useable but dummy databases
*/
static void pwdgrp_init(void)
{
FILE *fp;
mkdir("/etc", 0777);
/*
* Initialize /etc/passwd
*/
if ((fp = fopen("/etc/passwd", "r")) != NULL) {
fclose(fp);
}
else if ((fp = fopen("/etc/passwd", "w")) != NULL) {
fprintf(fp, "root:*:0:0:root::/:/bin/sh\n"
"rtems:*:1:1:RTEMS Application::/:/bin/sh\n"
"tty:!:2:2:tty owner::/:/bin/false\n" );
fclose(fp);
}
init_file(
"/etc/passwd",
"root:*:0:0:root::/:/bin/sh\n"
"rtems:*:1:1:RTEMS Application::/:/bin/sh\n"
"tty:!:2:2:tty owner::/:/bin/false\n"
);
/*
* Initialize /etc/group
*/
if ((fp = fopen("/etc/group", "r")) != NULL) {
fclose(fp);
}
else if ((fp = fopen("/etc/group", "w")) != NULL) {
fprintf( fp, "root:x:0:root\n"
"rtems:x:1:rtems\n"
"tty:x:2:tty\n" );
fclose(fp);
}
init_file(
"/etc/group",
"root:x:0:root\n"
"rtems:x:1:rtems\n"
"tty:x:2:tty\n"
);
}
void _libcsupport_pwdgrp_init(void)