zig/lib/libc/musl/src/legacy/getusershell.c
Andrew Kelley 49d1a4c562 move lib dirs to lib subdir
also start prefering NtDll API. so far:
 * NtQueryInformationFile
 * NtClose

adds a performance workaround for windows unicode conversion. but that
should probably be removed before merging
2019-07-15 17:54:50 -04:00

33 lines
565 B
C
Vendored

#define _GNU_SOURCE
#include <stdio.h>
#include <unistd.h>
static const char defshells[] = "/bin/sh\n/bin/csh\n";
static char *line;
static size_t linesize;
static FILE *f;
void endusershell(void)
{
if (f) fclose(f);
f = 0;
}
void setusershell(void)
{
if (!f) f = fopen("/etc/shells", "rbe");
if (!f) f = fmemopen((void *)defshells, sizeof defshells - 1, "rb");
}
char *getusershell(void)
{
ssize_t l;
if (!f) setusershell();
if (!f) return 0;
l = getline(&line, &linesize, f);
if (l <= 0) return 0;
if (line[l-1]=='\n') line[l-1]=0;
return line;
}