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output: deduplicate file closing code

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Signed-off-by: Sami Kerola <kerolasa@iki.fi>
This commit is contained in:
Sami Kerola 2017-11-11 23:09:33 +00:00
parent 7575294c36
commit 3dda0a77a5
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GPG key ID: A9553245FDE9B739
1 changed files with 40 additions and 130 deletions
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170
src/output.c
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@ -143,6 +143,33 @@ static int start_color(struct output_helper_t *oh, FILE *outfile)
}
return 0;
}
static FILE *open_outfile(void)
{
FILE *outfile;
if (config.output_file[0]) {
outfile = fopen(config.output_file, "w+");
if (outfile == NULL) {
error(EXIT_FAILURE, errno, "open_outfile: %s", config.output_file);
}
} else {
outfile = stdout;
}
return outfile;
}
static void close_outfile(FILE *outfile)
{
if (outfile == stdout) {
if (fflush(stdout))
error(EXIT_FAILURE, errno, "close_outfile: fflush");
} else {
if (close_stream(outfile))
error(EXIT_FAILURE, errno, "close_outfile: fclose");
}
}
/*! \brief Text output format, which is the default. */
static int output_txt(void)
{
@ -150,7 +177,6 @@ static int output_txt(void)
struct range_t *range_p;
struct shared_network_t *shared_p;
struct output_helper_t oh;
int ret;
FILE *outfile;
int max_ipaddr_length = config.ip_version == IPv6 ? 39 : 16;
@ -158,15 +184,7 @@ static int output_txt(void)
config.color_mode = color_on;
}
if (config.output_file[0]) {
outfile = fopen(config.output_file, "w+");
if (outfile == NULL) {
error(EXIT_FAILURE, errno, "output_txt: %s", config.output_file);
}
} else {
outfile = stdout;
}
outfile = open_outfile();
range_p = ranges;
shared_p = shared_networks;
@ -301,18 +319,7 @@ static int output_txt(void)
fputs(COLOR_RESET, outfile);
fprintf(outfile, "\n");
}
if (outfile == stdout) {
ret = fflush(stdout);
if (ret) {
error(EXIT_FAILURE, errno, "output_txt: fflush");
}
} else {
ret = close_stream(outfile);
if (ret) {
error(EXIT_FAILURE, errno, "output_txt: fclose");
}
}
close_outfile(outfile);
return 0;
}
@ -323,18 +330,9 @@ static int output_xml(const int print_mac_addreses)
struct range_t *range_p;
struct shared_network_t *shared_p;
struct output_helper_t oh;
int ret;
FILE *outfile;
if (config.output_file[0]) {
outfile = fopen(config.output_file, "w+");
if (outfile == NULL) {
error(EXIT_FAILURE, errno, "output_xml: %s", config.output_file);
}
} else {
outfile = stdout;
}
outfile = open_outfile();
range_p = ranges;
shared_p = shared_networks;
@ -410,18 +408,7 @@ static int output_xml(const int print_mac_addreses)
}
fprintf(outfile, "</dhcpstatus>\n");
if (outfile == stdout) {
ret = fflush(stdout);
if (ret) {
error(EXIT_FAILURE, errno, "output_xml: fflush");
}
} else {
ret = close_stream(outfile);
if (ret) {
error(EXIT_FAILURE, errno, "output_xml: fclose");
}
}
close_outfile(outfile);
return 0;
}
@ -432,19 +419,10 @@ static int output_json(const int print_mac_addreses)
struct range_t *range_p;
struct shared_network_t *shared_p;
struct output_helper_t oh;
int ret;
FILE *outfile;
unsigned int sep;
if (config.output_file[0]) {
outfile = fopen(config.output_file, "w+");
if (outfile == NULL) {
error(EXIT_FAILURE, errno, "output_json: %s", config.output_file);
}
} else {
outfile = stdout;
}
outfile = open_outfile();
range_p = ranges;
shared_p = shared_networks;
sep = 0;
@ -587,20 +565,8 @@ static int output_json(const int print_mac_addreses)
fprintf(outfile, " \"status\":%d\n", oh.status);
fprintf(outfile, " }"); /* end of summary */
}
fprintf(outfile, "\n}\n");
if (outfile == stdout) {
ret = fflush(stdout);
if (ret) {
error(EXIT_FAILURE, errno, "output_json: fflush");
}
} else {
ret = close_stream(outfile);
if (ret) {
error(EXIT_FAILURE, errno, "output_json: fclose");
}
}
close_outfile(outfile);
return 0;
}
@ -753,18 +719,9 @@ static int output_html(void)
struct range_t *range_p;
struct shared_network_t *shared_p;
struct output_helper_t oh;
int ret;
FILE *outfile;
if (config.output_file[0]) {
outfile = fopen(config.output_file, "w+");
if (outfile == NULL) {
error(EXIT_FAILURE, errno, "output_html: %s", config.output_file);
}
} else {
outfile = stdout;
}
outfile = open_outfile();
range_p = ranges;
shared_p = shared_networks;
html_header(outfile);
@ -903,17 +860,7 @@ static int output_html(void)
}
table_end(outfile);
html_footer(outfile);
if (outfile == stdout) {
ret = fflush(stdout);
if (ret) {
error(EXIT_FAILURE, errno, "output_html: fflush");
}
} else {
ret = close_stream(outfile);
if (ret) {
error(EXIT_FAILURE, errno, "output_html: fclose");
}
}
close_outfile(outfile);
return 0;
}
@ -925,17 +872,8 @@ static int output_csv(void)
struct shared_network_t *shared_p;
struct output_helper_t oh;
FILE *outfile;
int ret;
if (config.output_file[0]) {
outfile = fopen(config.output_file, "w+");
if (outfile == NULL) {
error(EXIT_FAILURE, errno, "output_csv: %s", config.output_file);
}
} else {
outfile = stdout;
}
outfile = open_outfile();
range_p = ranges;
shared_p = shared_networks;
if (config.header_limit & R_BIT) {
@ -1043,17 +981,7 @@ static int output_csv(void)
}
fprintf(outfile, "\n");
}
if (outfile == stdout) {
ret = fflush(stdout);
if (ret) {
error(EXIT_FAILURE, errno, "output_cvs: fflush");
}
} else {
ret = close_stream(outfile);
if (ret) {
error(EXIT_FAILURE, errno, "output_cvs: fclose");
}
}
close_outfile(outfile);
return 0;
}
@ -1067,21 +995,13 @@ static int output_alarming(void)
struct output_helper_t oh;
unsigned int i;
int rw = 0, rc = 0, ro = 0, ri = 0, sw = 0, sc = 0, so = 0, si = 0;
int ret_val, ret;
int ret_val;
outfile = open_outfile();
range_p = ranges;
range_size = get_range_size(range_p);
shared_p = shared_networks;
if (config.output_file[0]) {
outfile = fopen(config.output_file, "w+");
if (outfile == NULL) {
error(EXIT_FAILURE, errno, "output_alarming: %s", config.output_file);
}
} else {
outfile = stdout;
}
if (config.number_limit & R_BIT) {
for (i = 0; i < num_ranges; i++) {
range_output_helper(&oh, range_p);
@ -1221,17 +1141,7 @@ static int output_alarming(void)
}
}
fprintf(outfile, "\n");
if (outfile == stdout) {
ret = fflush(stdout);
if (ret) {
error(EXIT_FAILURE, errno, "output_alarming: fflush");
}
} else {
ret = close_stream(outfile);
if (ret) {
error(EXIT_FAILURE, errno, "output_alarming: fclose");
}
}
close_outfile(outfile);
return ret_val;
}