diff options
| -rw-r--r-- | LICENSE | 21 | ||||
| -rw-r--r-- | Makefile | 14 | ||||
| -rw-r--r-- | README.md | 3 | ||||
| -rw-r--r-- | nm.c | 113 |
4 files changed, 151 insertions, 0 deletions
@@ -0,0 +1,21 @@ +MIT License + +Copyright (c) 2026 czjstmax <jstmaxlol at disroot dot org> + +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in all +copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +SOFTWARE. diff --git a/Makefile b/Makefile new file mode 100644 index 0000000..88c9e3a --- /dev/null +++ b/Makefile @@ -0,0 +1,14 @@ +CC = gcc +IN = nm.c +OUT = nshm +LIBS = +OPTS = -O0 -g -Wall -Wextra -pedantic + +all: + $(CC) -o$(OUT) $(LIBS) $(OPTS) $(IN) + +run: all + ./$(OUT) + +clean: + rm $(OUT) diff --git a/README.md b/README.md new file mode 100644 index 0000000..6ee2c73 --- /dev/null +++ b/README.md @@ -0,0 +1,3 @@ +# noshmore - noshell more +an extended version of the [nosh minimal POSIX C shell](https://github.com/jstmaxlol/nosh), still for \*NIX dudes! + @@ -0,0 +1,113 @@ +/* noshmore + * an extended version of nosh, + * the minimal POSIX C shell. + * -> generally: adds some functionality. + * + * von czjstmax, <jstmaxlol at disroot dot org> + */ + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> +#include <signal.h> +#include <stdbool.h> +#include <wordexp.h> +#include <sys/wait.h> + +void handlecc(int sig); +void FreeAll(int n); + +char *line = NULL; +size_t len = 0; +wordexp_t p; + +int main(void) +{ + signal(SIGINT, handlecc); + + while (true) { + printf("$ "); + getline(&line, &len, stdin); + + line[strcspn(line, "\n")] = '\0'; + + wordexp(line, &p, 0); + + if (strlen(line) == 0) { + FreeAll(1); + continue; + } + if (strcmp(p.we_wordv[0], ":q") == 0 || strcmp(p.we_wordv[0], "exit") == 0) { + FreeAll(0); + return 0; + } + else if (strcmp(p.we_wordv[0], "echo") == 0) { + for (size_t i = 1; i < p.we_wordc; i++) + printf("%s ", p.we_wordv[i]); + if (p.we_wordc >= 2) { + if (strcmp(p.we_wordv[1], "-c") != 0) + printf("\n"); + else continue; + } + } + else if (strcmp(p.we_wordv[0], "cd") == 0) { + if (p.we_wordc <= 1) { + printf("nsh+! cd: no arguments were given.\n"); + FreeAll(1); + continue; + } + if (chdir(p.we_wordv[1])) + perror("nsh+! ERROR: failed to change directory"); + } + else if (strcmp(p.we_wordv[0], "clear") == 0) { + printf("\033[2J\033[H\033[3J"); + fflush(stdout); + } + else if (strcmp(p.we_wordv[0], "help") == 0) { + printf( + "noshmore\n" + "an extended version of nosh, the minimal POSIX C shell.\n" + "\n" + "built-ins:\n" + "echo -> outputs a string of text, doesn't need \" enclosure.\n" + " supports '-c' for output without '\\n'" + "clear -> clears screen (and scrollback)\n" + "cd -> change working directory\n" + "help -> prints this screen\n" + "\ngithub repo: github.com/jstmaxlol/noshmore\n" + ); + } + else { + pid_t pid = fork(); + char **argv = p.we_wordv; // pray with me now + if (pid == 0) { + execvp(p.we_wordv[0], argv); + perror("nsh+! ERROR: failed to execvp()"); + FreeAll(0); + _exit(1); + } + else if (pid > 0) { + int status; + waitpid(pid, &status, 0); + } + else { + printf("nsh+! couldn't open %s", p.we_wordv[0]); + } + } + } +} + +void handlecc(int sig) +{ + printf("\nnsh+! %d caught.\nfreeing stuff before quitting.\n", sig); + FreeAll(0); + exit(0); +} + +void FreeAll(int n) +{ + wordfree(&p); + if (n == 0) + free(line); +} |