77 lines
1.4 KiB
C
77 lines
1.4 KiB
C
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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static void usage (void) __attribute__ ((unused));
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int
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main (int argc, char *argv[], char *envp[])
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{
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if (argc < 3)
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{
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usage();
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return EXIT_FAILURE;
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}
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int i = 1;
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while (i < argc)
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{
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char *endptr;
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long count = strtol (argv[i], &endptr, 10);
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if (*endptr != '\0' || count <= 0)
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{
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usage();
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return EXIT_FAILURE;
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}
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i++;
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if (i >= argc)
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{
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usage();
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return EXIT_FAILURE;
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}
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char *var = argv[i];
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char *val = NULL;
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int x = 0;
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while (envp[x] != NULL)
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{
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if (strstr(envp[x], var) == envp[x])
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{
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val = envp[x];
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break;
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}
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x++;
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}
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if (val == NULL)
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{
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val = "";
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for (long j = 0; j < count; j++)
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{
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printf("%s=%s\n", var, val);
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}
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val = "";
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}
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else
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{
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for (long j = 0; j < count; j++)
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{
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printf("%s\n", val);
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}
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}
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i++;
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}
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return EXIT_SUCCESS;
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}
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static void
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usage (void)
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{
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printf ("repeat, a tool for printing repeated environment variables\n");
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printf ("usage: repeat N VAR ...\n");
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printf ("each N must be a positive integer\n");
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printf ("N VAR can be repeated, but each repetition must have both\n");
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}
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