hellerve/cd_check
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Added usage

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This commit is contained in:
Veit Heller
2015-01-25 12:38:28 +01:00
parent a98a5c9a23
commit 8c243e8320
4 changed files with 36 additions and 0 deletions
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9
src/cd_check_capabilities.c
View File

@@ -13,12 +13,21 @@ static inline void die(int code, const char* message, int fd){
exit(code); exit(code);
} }
static inline void print_usage(){
printf("Usage: %s [-h]\n\t-h\tdisplays this help message.\n\t\
Calling the program with no arguments will check the CD \
tray and its' capabilities.", program_name);
die(127);
}
int main(int argc, char** argv){ int main(int argc, char** argv){
register int fd, caps; register int fd, caps;
if(!argv) die(127, "How did you do that? No argv?", -1); if(!argv) die(127, "How did you do that? No argv?", -1);
program_name = argv[0]; program_name = argv[0];
if(argc > 1) print_usage();
if((fd = open("/dev/cdrom", O_RDONLY | O_NONBLOCK)) == -1) if((fd = open("/dev/cdrom", O_RDONLY | O_NONBLOCK)) == -1)
die(127, "Cannot open /dev/cdrom", fd); die(127, "Cannot open /dev/cdrom", fd);

9
src/cd_check_eject.c
View File

@@ -13,12 +13,21 @@ static inline void die(int code, const char* message, int fd){
exit(code); exit(code);
} }
static inline void print_usage(){
printf("Usage: %s [-h]\n\t-h\tdisplays this help message.\n\t\
Calling the program with no arguments will open the CD \
tray.", program_name);
die(127);
}
int main(int argc, char** argv){ int main(int argc, char** argv){
register int fd; register int fd;
if(!argv) die(127, "How did you do that? No argv?", -1); if(!argv) die(127, "How did you do that? No argv?", -1);
program_name = argv[0]; program_name = argv[0];
if(argc > 1) print_usage();
if((fd = open("/dev/cdrom", O_RDONLY | O_NONBLOCK)) == -1) if((fd = open("/dev/cdrom", O_RDONLY | O_NONBLOCK)) == -1)
die(127, "Cannot open /dev/cdrom", fd); die(127, "Cannot open /dev/cdrom", fd);

9
src/cd_check_read.c
View File

@@ -14,6 +14,13 @@ static inline void die(int code, const char* message, int fd){
exit(code); exit(code);
} }
static inline void print_usage(){
printf("Usage: %s [-h]\n\t-h\tdisplays this help message.\n\t\
Calling the program with no arguments will read the \
CD lying in the tray and play it.", program_name);
die(127);
}
int main(int argc, char** argv){ int main(int argc, char** argv){
register int fd; register int fd;
struct cdrom_tocentry toc_entry; struct cdrom_tocentry toc_entry;
@@ -22,6 +29,8 @@ int main(int argc, char** argv){
if(!argv) die(127, "How did you do that? No argv?", -1); if(!argv) die(127, "How did you do that? No argv?", -1);
program_name = argv[0]; program_name = argv[0];
if(argc > 1) print_usage();
if((fd = open("/dev/cdrom", O_RDONLY)) == -1){ if((fd = open("/dev/cdrom", O_RDONLY)) == -1){
if(errno == ENOMEDIUM) if(errno == ENOMEDIUM)
die(127, "No CD in drive", fd); die(127, "No CD in drive", fd);

9
src/cd_check_read_toc.c
View File

@@ -14,6 +14,13 @@ static inline void die(int code, const char* message, int fd){
exit(code); exit(code);
} }
static inline void print_usage(){
printf("Usage: %s [-h]\n\t-h\tdisplays this help message.\n\t\
Calling the program with no arguments will read the \
table of contents of the CD lying in the tray.", program_name);
die(127);
}
int main(int argc, char** argv){ int main(int argc, char** argv){
register int fd; register int fd;
register unsigned char i; register unsigned char i;
@@ -23,6 +30,8 @@ int main(int argc, char** argv){
if(!argv) die(127, "How did you do that? No argv?", -1); if(!argv) die(127, "How did you do that? No argv?", -1);
program_name = argv[0]; program_name = argv[0];
if(argc > 1) print_usage();
if((fd = open("/dev/cdrom", O_RDONLY)) == -1){ if((fd = open("/dev/cdrom", O_RDONLY)) == -1){
if(errno == ENOMEDIUM) if(errno == ENOMEDIUM)
die(127, "No CD in drive", fd); die(127, "No CD in drive", fd);