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cirosantillicirosantilli
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posix: continue breaking up main
1 parent dc11b3c commit c1c8d15

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Lines changed: 123 additions & 248 deletions

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‎posix/README.md‎

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1. semaphore_unnamed.c TODO
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1. semaphore_named.c TODO. https://stackoverflow.com/questions/16400820/c-how-to-use-posix-semaphores-on-forked-processes
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1. [mmap](mmap.c)
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1. [shm_open](shm_open.c)
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1. [MAP_PRIVATE](map_private.c)
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1. Shared memory
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1. [shm_open](shm_open.c)
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1. [shmget](shmget.c)
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1. [syslog](syslog.c)
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1. [getrusage](getrusage.c)
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1. [pthread](pthread.md)
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1. Signal
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1. [Kill](kill.c)
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1. Interactive
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1. [signal_sleep](interactive/signal_sleep.c)
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1. [sigint](interactive/sigint.c)
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1. [signal_fork](interactive/signal_fork.c)
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1. setpgid
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1. [setpgid.md](interactive/setpgid.md)
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1. [setpgid.c](interactive/setpgid.c)
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1. [alarm](interactive/alarm.c)
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1. [alarm](interactive/alarm.c)
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1. [signal_sleep](interactive/signal_sleep.c)
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1. [sigint](interactive/sigint.c)
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1. [signal_fork](interactive/signal_fork.c)
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1. Interactive
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1. [getlogin](interactive/getlogin.c)
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1. [poll](interactive/poll.c)
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1. [pthread_work](interactive/pthread_work.c)
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1. [sleep cout](interactive/sleep_count.c)
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1. [sleep_1](interactive/sleep_1.c)
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1. [pthread_work](interactive/pthread_work.c)
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1. [poll](interactive/poll.c)
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1. [uname](interactive/uname.c)
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1. Process information
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1. [getcwd](interactive/uname.c)
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1. setpgid
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1. [setpgid.md](interactive/setpgid.md)
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1. [setpgid.c](interactive/setpgid.c)
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1. [Biblography](bibliography.md)

‎posix/interactive/getcwd.c‎

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/* A pwd implementation. */
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#include "common.h"
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int main(void) {
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/* TODO don't hardcode. */
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enum Constexpr { N = 1 << 10 };
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char buf[N];
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if (getcwd(buf, N) == NULL) {
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perror("getcwd");
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exit(EXIT_FAILURE);
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}
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printf("%s\n", buf);
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return EXIT_SUCCESS;
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}

‎posix/interactive/getlogin.c‎

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/* # getlogin
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*
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* Get login name of controlling terminal
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*
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* This is different from `getuid` since it looks at the controlling terminal,
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* and not at processes specific information.
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*
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* Observe the difference with:
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*
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* sudo ./getlogin.out
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*
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* Which outputs the username of the non-sudo user.
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*/
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#include "common.h"
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int main(void) {
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char *login;
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login = getlogin();
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if (login == NULL) {
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perror("getlogin");
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} else {
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printf("%s\n", login);
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}
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return EXIT_SUCCESS;
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}

‎posix/interactive/uname.c‎

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/* # uname
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*
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* Get information about the current computer using `uname`.
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*
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* Unsurprisingly, it is the same information given by the POSIX utility `uname`.
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* https://unix.stackexchange.com/questions/136959/where-does-uname-get-its-information-from/485962#485962
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*/
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#include "common.h"
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int main(void) {
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struct utsname info;
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if (uname(&info) == -1) {
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perror("uname");
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exit(EXIT_FAILURE);
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}
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printf("sysname = %s\n", info.sysname );
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printf("nodename = %s\n", info.nodename);
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printf("release = %s\n", info.release );
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printf("version = %s\n", info.version );
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printf("machine = %s\n", info.machine );
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return EXIT_SUCCESS;
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}

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