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Check setreuid() return value to eliminate warnings. Update makefile

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AK6DN 2017-10-15 21:15:17 -07:00
parent ee01f9eefd
commit 5a83ea113c
2 changed files with 6 additions and 5 deletions
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7
makefile
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@ -9,25 +9,26 @@ ifeq ($(OPSYS),Darwin)
# mac: UNIX comms model, but on MACOSX
OPTIONS = -DMACOSX
LFLAGS = -lpthread
BINDIR = /usr/local/bin
else ifeq ($(OPSYS:CYGWIN%=CYGWIN),CYGWIN)
# win: WINDOWS comms model under CYGWIN (any version)
OPTIONS = -DCYGWIN -DWINCOMM
LFLAGS = -lpthread -lrt
BINDIR = /cygdrive/e/DEC/tools/exe
else ifeq ($(OPSYS),Linux)
# unix: UNIX comms model under LINUX, use PARMRK serial mode
OPTIONS = -DLINUX -DUSE_PARMRK
LFLAGS = -lpthread -lrt
BINDIR = /usr/local/bin
else # unknown environment
OPTIONS =
LFLAGS = -lpthread -lrt
BINDIR = /usr/local/bin
endif
# default program name, redefine PROG=xxx on command line if wanted
PROG = tu58em
# put your binary installation directory here...
BINDIR = /cygdrive/e/DEC/tools/exe
# compiler flags and libraries
CC = gcc
CFLAGS = -I. -O3 -Wall -c $(OPTIONS)

4
serial.c
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@ -586,10 +586,10 @@ void devinit (char *port,
// open serial port
int32_t euid = geteuid();
int32_t uid = getuid();
setreuid(euid, -1);
if (setreuid(euid, -1)) fatal("setreuid(euid,-1) failed");
if (sscanf(port, "%u", &n) == 1) sprintf(name, "/dev/ttyS%u", n-1); else strcpy(name, port);
if ((device = open(name, O_RDWR|O_NDELAY|O_NOCTTY)) < 0) fatal("no serial line [%s]", name);
setreuid(uid, euid);
if (setreuid(uid, euid)) fatal("setreuid(uid,euid) failed");
// get current line params, error if not a serial port
if (tcgetattr(device, &lineSave)) fatal("not a serial device [%s]", name);